Featured
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| Open AccessFunction-oriented design of robust metal cocatalyst for photocatalytic hydrogen evolution on metal/titania composites
Photocatalytic performances require both active catalytic surfaces and efficient electron transfer steps. Here the authors introduce a function-oriented catalyst design strategy optimizing both aspects and generalize an effective electron transfer descriptor on metal/oxide catalysts.
- Dong Wang
- & Xue-Qing Gong
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Article
| Open AccessA cooperative biphasic MoOx–MoPx promoter enables a fast-charging lithium-ion battery
Fast-charging of lithium-ion batteries is hindered by the uncontrollable plating of metallic Li on the graphite anode during cycling. Here, the authors demonstrate the fast chargeability and long cycle lifetimes via surface engineering of graphite with a cooperative biphasic MoOx–MoPx promoter.
- Sang-Min Lee
- , Junyoung Kim
- & Min-Sik Park
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Article
| Open AccessKey activity descriptors of nickel-iron oxygen evolution electrocatalysts in the presence of alkali metal cations
It is commonly accepted that electrolyte alkali metal cations modify the catalytic activity for oxygen evolution reaction. Here the authors challenge this assumption, showing that the activity is actually affected by a change in the electrolyte pH rather than a specific alkali cation.
- Mikaela Görlin
- , Joakim Halldin Stenlid
- & Oscar Diaz-Morales
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Article
| Open AccessDifferential guest location by host dynamics enhances propylene/propane separation in a metal-organic framework
Porous materials acting as molecular sieves for propylene/propane separation are important for the petrochemical industry. Here the authors show an example of how specific guest-host interactions can result in structural changes in the porous host and shut down diffusion of one of the two similar guest molecules.
- Dmytro Antypov
- , Aleksander Shkurenko
- & Matthew S. Dyer
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Article
| Open AccessBayesian learning of chemisorption for bridging the complexity of electronic descriptors
Developing a generalizable model to describe adsorption processes at metal surfaces can be extremely challenging due to complex phenomena involved. Here the authors introduce a Bayesian learning approach based on ab initio data and the d-band model to capture the essential physics of adsorbate–substrate interactions.
- Siwen Wang
- , Hemanth Somarajan Pillai
- & Hongliang Xin
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Article
| Open AccessAtomically dispersed Lewis acid sites boost 2-electron oxygen reduction activity of carbon-based catalysts
H2O2 production via oxygen reduction offers a renewable approach to obtain an often-used oxidant. Here, authors show the incorporation of Lewis acid sites into carbon-based materials to improve H2O2 electrosynthesis.
- Qihao Yang
- , Wenwen Xu
- & Liang Chen
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Article
| Open AccessMachine learning in chemical reaction space
Application of machine-learning approaches to exploring chemical reaction networks is challenging due to need of including open-shell reaction intermediates. Here the authors introduce a density functional theory database of closed and open-shell molecules for machine-learning predictions of reaction energies.
- Sina Stocker
- , Gábor Csányi
- & Johannes T. Margraf
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Article
| Open AccessFast site-to-site electron transfer of high-entropy alloy nanocatalyst driving redox electrocatalysis
The design of nanostructured catalysts plays a key role in the electrocatalytic redox reaction performances. Here, authors prepared uniform and small-sized high-entropy alloy PtNiFeCoCu nanoparticles that showed improved activities for H2 evolution methanol oxidation reactions.
- Hongdong Li
- , Yi Han
- & Lei Wang
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Article
| Open AccessComputational screen-out strategy for electrically pumped organic laser materials
Though the goal of current organic solid-state laser research remains the realization of electrically pumped lasing, identifying organic semiconductors with ideal properties remains a challenge. Here, the authors report a computational strategy for screening electrical pumping lasing molecules.
- Qi Ou
- , Qian Peng
- & Zhigang Shuai
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Article
| Open AccessModulating oxygen coverage of Ti3C2Tx MXenes to boost catalytic activity for HCOOH dehydrogenation
Developing non-noble-metal heterogeneous catalysts with high efficiency in HCOOH dehydrogenation is significant for the acquisition of hydrogen, but remains a great challenge. Here, the authors modulate oxygen coverage of Ti3C2Tx MXenes to boost the catalytic activity toward HCOOH dehydrogenation.
- Tingting Hou
- , Qiquan Luo
- & Liangbing Wang
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Article
| Open AccessLattice oxygen activation enabled by high-valence metal sites for enhanced water oxidation
Electrocatalytic water oxidation is facilitated by high valence states, but these are challenging to achieve at low applied potentials. Here, authors report a multicomponent FeCoCrNi alloy with dynamically formed Ni4+ species to offer high catalytic activity via lattice oxygen activation mechanism.
- Ning Zhang
- , Xiaobin Feng
- & Yang Chai
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Article
| Open AccessMachine learning accurate exchange and correlation functionals of the electronic density
Increasing the non-locality of the exchange and correlation functional in DFT theory comes at a steep increase in computational cost. Here, the authors develop NeuralXC, a supervised machine learning approach to generate density functionals close to coupled-cluster level of accuracy yet computationally efficient.
- Sebastian Dick
- & Marivi Fernandez-Serra
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Article
| Open Accessπ covalency in the halogen bond
Current models of halogen bonding describe the σ-symmetric component of this interaction but do not contemplate the possibility of π-covalency. Here the authors provide experimental and computational evidence of π-covalency in halogen bonds involving radical cation halogen bond donors.
- Cameron W. Kellett
- , Pierre Kennepohl
- & Curtis P. Berlinguette
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Article
| Open AccessTuning reactivity of Fischer–Tropsch synthesis by regulating TiOx overlayer over Ru/TiO2 nanocatalysts
The activity of Fischer–Tropsch synthesis (FTS) can be promoted by the reducible oxides, while their role remains elusive. Here, the authors reveal that, by varying the reduction condition to regulate the TiOx overlayer on Ru nanocatalysts, the TiOx overlayer participate in the C–O bond dissociation.
- Yaru Zhang
- , Xiaoli Yang
- & Tao Zhang
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Article
| Open AccessMolecular molds for regularizing Kondo states at atom/metal interfaces
The surrounding environment’s influence on the Kondo states formed around an adsorbed transition metal atom are challenging potential applications. Here, the authors demonstrate, via STM and DFT+HEOM calculations, that a metal phthalocyanine molecule on an Au(111) surface enables a fine tuning of the Kondo characteristics.
- Xiangyang Li
- , Liang Zhu
- & Jinlong Yang
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Article
| Open AccessIn-situ structure and catalytic mechanism of NiFe and CoFe layered double hydroxides during oxygen evolution
NiFe and CoFe layered double hydroxides are among the most active electrocatalysts for the alkaline oxygen evolution reaction. Here, by combining operando experiments and rigorous DFT calculations, the authors unravel their active phase, the reaction center and the catalytic mechanism.
- Fabio Dionigi
- , Zhenhua Zeng
- & Peter Strasser
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Article
| Open AccessSelective electroreduction of CO2 to acetone by single copper atoms anchored on N-doped porous carbon
Efficient electroreduction of CO2 to multi-carbon products is challenging. Here, the single atom Cu encapsulated on N-doped porous carbon catalysts are designed for reducing CO2 to acetone at low overpotentials and the active sites are identified as Cu coordination with four pyrrole-N atoms.
- Kun Zhao
- , Xiaowa Nie
- & Jingguang G. Chen
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Article
| Open AccessBuilding and identifying highly active oxygenated groups in carbon materials for oxygen reduction to H2O2
The identity of catalytic sites for H2O2 generation in carbon-based materials remains controversial with limited experimental evidence to date. Here, the authors decorate various target functional groups on carbon materials and quinone-enriched samples exhibit the highest activity and selectivity.
- Gao-Feng Han
- , Feng Li
- & Jong-Beom Baek
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Article
| Open AccessAutonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab
Synthetic platforms coupled with artificial intelligent algorithms are highly desirable for advancing the discovery of new materials with target properties. Here the authors demonstrate the use of an autonomous laboratory for the discovery of optically active CsPbBr3 inorganic perovskite nanocrystals.
- Jiagen Li
- , Junzi Li
- & Xi Zhu
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Article
| Open AccessVoltage- and time-dependent valence state transition in cobalt oxide catalysts during the oxygen evolution reaction
Determining catalyst electronic structures during electrochemical reactions is crucial to understand mechanisms. Here authors perform in operando soft X-ray spectroscopy on a cobalt oxide catalyst during O2 evolution and observe voltage and time-dependent valence state transitions.
- Jing Zhou
- , Linjuan Zhang
- & Zhiwei Hu
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Article
| Open AccessUnusual KIE and dynamics effects in the Fe-catalyzed hetero-Diels-Alder reaction of unactivated aldehydes and dienes
Recently an iron catalyst was developed to catalyze an oxa-Diels-Alder reaction, whose mechanism is unclear yet. Here the authors combine DFT and molecular dynamics simulations with experimental studies to elucidate the unusual iron effect on kinetic isotope effect and dynamics in this reaction.
- Yuhong Yang
- , Xiaoyong Zhang
- & Lung Wa Chung
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Article
| Open AccessOrigins of fast diffusion of water dimers on surfaces
The experimental observation that water dimers diffuse more rapidly than monomers across materials’ surfaces is yet to be clarified. Here the authors show by ab initio calculations classical and quantum mechanical mechanisms for faster water dimer diffusion on a broad range of metal and non-metal surfaces.
- Wei Fang
- , Ji Chen
- & Angelos Michaelides
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Article
| Open AccessHigh-efficiency direct methane conversion to oxygenates on a cerium dioxide nanowires supported rhodium single-atom catalyst
Direct methane conversion to high value-added products is a promising way for highly-efficient utilization of methane. Here, the authors demonstrate that rhodium single-atom supported on cerium dioxide nanowires can selectively convert methane to oxygenates under mild conditions.
- Shuxing Bai
- , Fangfang Liu
- & Xiaoqing Huang
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Article
| Open AccessCharge transfer as a ubiquitous mechanism in determining the negative charge at hydrophobic interfaces
The accumulation of negative charge at hydrophobic–water interfaces has been a source of debate for a long time. Here the authors use ab initio calculations to show that the charge accumulation at air–water and oil–water interfaces is caused by subtle charge transfer processes.
- Emiliano Poli
- , Kwang H. Jong
- & Ali Hassanali
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Article
| Open AccessArtificial relativistic molecules
Artificial molecules supported on templated surfaces attract enormous interest due to their tunable electronic properties. Here the authors use STM experiments and DFT calculations to show the formation of Pb artificial clusters on a IrTe2 honeycomb template that are maximally stabilized by relativistic effects.
- Jae Whan Park
- , Hyo Sung Kim
- & Han Woong Yeom
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Article
| Open AccessA first principles method to determine speciation of carbonates in supercritical water
The determination of the speciation of ions and molecules in supercritical aqueous fluids under pressure is key to understanding their mass transport in the Earth’s interior. Here the authors present a strategy based on ab-initio molecular dynamics to determine the speciation of carbonates in aqueous fluids.
- Ding Pan
- & Giulia Galli
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Article
| Open AccessReaction scope and mechanistic insights of nickel-catalyzed migratory Suzuki–Miyaura cross-coupling
Migratory cross-coupling reactions are powerful tools to form bonds at predictable positions. Here the authors report a nickel-catalyzed migratory Suzuki–Miyaura cross-coupling of unactivated alkyl electrophiles with aryl and vinyl boron reagents and provide experimental and computational mechanistic evidence.
- Yuqiang Li
- , Yixin Luo
- & Guoyin Yin
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Article
| Open AccessRealization of Lieb lattice in covalent-organic frameworks with tunable topology and magnetism
Although artificial Lieb lattices have been recently synthesized, the realization of a Lieb lattice in a real material is still challenging. Here the authors use tight-binding and first principle calculations to predict tunable topology and magnetism in recently discovered two-dimensional covalent-organic frameworks.
- Bin Cui
- , Xingwen Zheng
- & Bing Huang
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Article
| Open AccessPalladium-bearing intermetallic electride as an efficient and stable catalyst for Suzuki cross-coupling reactions
In Suzuki coupling reactions, excellent catalytic performance require negatively charged Pd species and the avoidance of metal leaching or clustering. Here the authors implanted Pd sites into an intermetallic electride, Y3Pd2, which serves as an efficient and stable catalyst for Suzuki coupling reactions.
- Tian-Nan Ye
- , Yangfan Lu
- & Hideo Hosono
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Article
| Open AccessRoom-temperature quantum interference in single perovskite quantum dot junctions
Quantum interference effects remain elusive in halide perovskite materials. Here Zheng et al. reveal the atomic origin of the conductance features in the single perovskite quantum dot junctions, and present direct evidence of the room-temperature quantum interference effects.
- Haining Zheng
- , Songjun Hou
- & Wenjing Hong
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Article
| Open AccessSolid-to-liquid phase transitions of sub-nanometer clusters enhance chemical transformation
Understanding the dynamic evolution of the catalysts’ structure under reaction conditions is crucial in heterogeneous catalysis. Here the authors use ab initio molecular dynamics simulations to show an anomalous decrease in reaction free energies and barriers on dynamical sub-nanometer Au clusters supported on MgO(001).
- Juan-Juan Sun
- & Jun Cheng
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Article
| Open AccessUnderstanding carbon dioxide activation and carbon–carbon coupling over nickel
Carbon dioxide is a desired feedstock for platform molecules, such as carbon monoxide and higher hydrocarbons, but needs improved catalysts. Here, the authors use a combined theoretical and experimental approach to tune the activity and selectivity of CO2 conversion over nickel towards desired products.
- Charlotte Vogt
- , Matteo Monai
- & Bert M. Weckhuysen
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Article
| Open AccessEnhancing materials property prediction by leveraging computational and experimental data using deep transfer learning
Machine-learning approaches based on DFT computations can greatly enhance materials discovery. Here the authors leverage existing large DFT-computational data sets and experimental observations by deep transfer learning to predict the formation energy of materials from their elemental compositions with high accuracy.
- Dipendra Jha
- , Kamal Choudhary
- & Ankit Agrawal
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Article
| Open AccessUnifying machine learning and quantum chemistry with a deep neural network for molecular wavefunctions
Machine learning models can accurately predict atomistic chemical properties but do not provide access to the molecular electronic structure. Here the authors use a deep learning approach to predict the quantum mechanical wavefunction at high efficiency from which other ground-state properties can be derived.
- K. T. Schütt
- , M. Gastegger
- & R. J. Maurer
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Article
| Open AccessExact exchange-correlation potentials from ground-state electron densities
The inverse DFT problem of mapping the ground-state density to its exchange correlation potential has been numerically challenging so far. Here, the authors propose an approach for an accurate solution to the inverse DFT problem, enabling the evaluation of exact exchange and correlation potential from an ab initio density.
- Bikash Kanungo
- , Paul M. Zimmerman
- & Vikram Gavini
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Article
| Open AccessUnraveling the coordination structure-performance relationship in Pt1/Fe2O3 single-atom catalyst
In single-atom catalysts (SACs), little is known about how the coordination structure of single atoms affects the catalytic performance. Here, the authors discover that in Pt1/Fe2O3 SAC, the coordination number of the first shell Pt-O is well correlated with the Pt electronic property and the hydrogenation activity.
- Yujing Ren
- , Yan Tang
- & Tao Zhang
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Article
| Open AccessReaction selectivity of homochiral versus heterochiral intermolecular reactions of prochiral terminal alkynes on surfaces
Controlling selectivity between homochiral and heterochiral reaction pathways on surfaces is intriguing but challenging. Here, the authors demonstrate strategies in steering the reactions of prochiral terminal alkynes between the homochiral and heterochiral pathways by tuning the precursor substituents and the kinetic parameters.
- Tao Wang
- , Haifeng Lv
- & Junfa Zhu
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Article
| Open AccessRemarkable active-site dependent H2O promoting effect in CO oxidation
The issue that whether single-atom sites possess similar catalytic properties to the interfacial sites of nanocatalysts remains unresolved. Here, the authors demonstrate a large H2O promotional effect on CO oxidation over Au single-atom sites due to their unique local atomic structure and electronic properties.
- Shu Zhao
- , Fang Chen
- & Tao Zhang
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Article
| Open AccessRevealing the intrinsic nature of the mid-gap defects in amorphous Ge2Sb2Te5
The structural origin of the mid-gap states responsible for the time-dependent resistance drift in phase-change materials is still under debate. Here the authors use machine learning and density functional theory to identify the structural motifs of the mid-gap defects in the prototypical Ge2Sb2Te5 phase-change alloy.
- Konstantinos Konstantinou
- , Felix C. Mocanu
- & Stephen R. Elliott
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Article
| Open AccessA Lieb-like lattice in a covalent-organic framework and its Stoner ferromagnetism
While ferromagnetism has been observed in an sp2 covalent-organic framework, its origin remains unclear. Here, by first-principle and tight-binding calculations, the authors identify the Lieb-lattice-like feature of the two-dimensional covalent-organic material and the Stoner mechanism responsible for its magnetic behavior.
- Wei Jiang
- , Huaqing Huang
- & Feng Liu
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Article
| Open AccessVersatile electrification of two-dimensional nanomaterials in water
The origins of the different charging processes observed in graphene and boron-nitride nanofluidics are still under debate. Here, using ab-initio molecular dynamics, the authors show that hydroxide species in water exhibits physisorption on graphene but strong chemisorption on boron-nitride.
- Benoît Grosjean
- , Marie-Laure Bocquet
- & Rodolphe Vuilleumier
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Article
| Open AccessOn-surface light-induced generation of higher acenes and elucidation of their open-shell character
The synthesis of large acenes via traditional solution-chemistry routes is hindered by their poor solubility and high reactivity under ambient conditions. Here, the authors demonstrate the on-surface formation of large acenes, via visible-light-induced photo-dissociation of α-bisdiketone molecular precursors on an Au(111) substrate.
- José I. Urgel
- , Shantanu Mishra
- & Roman Fasel
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Article
| Open AccessTuning and mechanistic insights of metal chalcogenide molecular catalysts for the hydrogen-evolution reaction
While hydrogen offers a potential carbon neutral fuel, its production from water using earth-abundant, heterogeneous materials has proven challenging to understand. Here, authors present a series of molecular electrocatalysts based on molybdenum, sulphur, and oxygen for aqueous hydrogen evolution.
- James McAllister
- , Nuno A. G. Bandeira
- & Haralampos N. Miras
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Article
| Open AccessNon defect-stabilized thermally stable single-atom catalyst
Developing stable single-atom catalysts (SACs) with a high metal loading remains a challenge due to the difficulty of creating high densities of defects on support materials. Here the authors prepare Pt SACs with high Pt loadings by virtue of strong covalent metal-support interaction, rather than support defects.
- Rui Lang
- , Wei Xi
- & Tao Zhang
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Article
| Open AccessDifferentiation between enamines and tautomerizable imines in the oxidation reaction with TEMPO
Tautomerization of imines into enamines is the basis of their similar reactivity; however, minor structural changes may lead to different outcomes. Here, the authors show that the reaction of cyclohexanone and amines in presence of TEMPO affords either α-amino-enones or arylamines depending on the intermediate imine structure.
- Xiaoming Jie
- , Yaping Shang
- & Weiping Su
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Correspondence
| Open AccessThe diamine cation is not a chemical example where density functional theory fails
- Zulfikhar A. Ali
- , Fredy W. Aquino
- & Bryan M. Wong
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Article
| Open AccessDeep neural networks for accurate predictions of crystal stability
Crystal stability prediction is of paramount importance for novel material discovery, with theoretical approaches alternative to expensive standard schemes highly desired. Here the authors develop a deep learning approach which, just using two descriptors, provides crystalline formation energies with very high accuracy.
- Weike Ye
- , Chi Chen
- & Shyue Ping Ong
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Article
| Open AccessAtomic engineering of high-density isolated Co atoms on graphene with proximal-atom controlled reaction selectivity
Controllable synthesis of single atom catalysts with sufficiently high metal loading remains challenging due to the tendency of agglomeration. Here the authors synthesize a series of stable atomically dispersed cobalt atoms on graphene with high Co loadings via the regeneration of active sites by atomic layer deposition.
- Huan Yan
- , Xiaoxu Zhao
- & Jiong Lu
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Article
| Open AccessUnderstanding the apparent fractional charge of protons in the aqueous electrochemical double layer
A detailed atomic-scale description of the electrochemical interface is essential to the understanding of electrochemical energy transformations. Here, the authors investigate the solvated proton at the electrochemical interface and show that it unexpectedly carries a fractional charge.
- Leanne D. Chen
- , Michal Bajdich
- & Jens K. Nørskov