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| Open AccessThe synergistic effect of Hf-O-Ru bonds and oxygen vacancies in Ru/HfO2 for enhanced hydrogen evolution
Although ruthenium nanomaterials have proven to be effective catalysts for H2 evolution, there is still room for activity improvements. Here, authors develop an efficient Ru/HfO2 electrocatalyst with tuned Ru-O-Hf bonds and oxygen vacancies that shows high activities for alkaline H2 evolution.
- Guangkai Li
- , Haeseong Jang
- & Jaephil Cho
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Article
| Open AccessHydrogen spillover in complex oxide multifunctional sites improves acidic hydrogen evolution electrocatalysis
While renewable H2 production offers a promising route for clean energy production, there is an urgent need to improve catalyst performances. Here, authors design a Pt-containing complex oxide that utilizes atomic-scale hydrogen spillover to promote H2 evolution electrocatalysis in acidic media.
- Jie Dai
- , Yinlong Zhu
- & Zongping Shao
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| Open AccessSingle-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56%
In this work, the highly dispersed and large loading amount (>1 wt%) of copper single-atoms were achieved on TiO2, resulting into an apparent quantum efficiency of 56% at 365 nm, in addition to an excellent thermal stability as proved after storing 380 days.
- Yumin Zhang
- , Jianhong Zhao
- & Qingju Liu
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| Open AccessA durable and pH-universal self-standing MoC–Mo2C heterojunction electrode for efficient hydrogen evolution reaction
Scalable fabrication of Low-cost hydrogen evolution reaction (HER) catalysts that can operate at industry-relevant conditions is highly needed for efficient water electrolyzers. Here the authors show a scalable synthesis of a MoC-Mo2C heterojunction electrode with efficient HER activity and high stability at industrial conditions.
- Wei Liu
- , Xiting Wang
- & Dihua Wang
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| Open AccessBoride-derived oxygen-evolution catalysts
Metal borides/borates are promising candidates to become high-performance alkaline oxygen evolution reaction catalysts. This study reports an in-situ phase composition modulation approach to fabricate boride/borate-based catalysts.
- Ning Wang
- , Aoni Xu
- & Hongyan Liang
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| Open AccessWS2 moiré superlattices derived from mechanical flexibility for hydrogen evolution reaction
Expanding the available materials with moiré superlattices is interesting but also challenging. Here the authors use a one-step hydrothermal approach to synthesis WS2 moiré superlattices with high catalytic activity for hydrogen evolution reaction
- Lingbin Xie
- , Longlu Wang
- & Qiang Zhao
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Article
| Open AccessHighly efficient and robust noble-metal free bifunctional water electrolysis catalyst achieved via complementary charge transfer
While water electrolysis offers a renewable means to obtain H2, it is necessary to understand the roles adopted by catalytic components. Here, authors explore a heterostructured MoSe2/perovskite oxide catalyst that shows multidirectional charge transfer to boost electrocatalytic water splitting.
- Nam Khen Oh
- , Jihyung Seo
- & Hyesung Park
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| Open AccessModifying redox properties and local bonding of Co3O4 by CeO2 enhances oxygen evolution catalysis in acid
Developing efficient and stable earth-abundant electrocatalysts for acidic oxygen evolution reaction is challenging. Here, the authors modify the local bonding environment of Co3O4 by CeO2 nanocrystallites to regulate the redox properties, thus enhance the catalytic activity.
- Jinzhen Huang
- , Hongyuan Sheng
- & Song Jin
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Article
| Open AccessOn the limitations in assessing stability of oxygen evolution catalysts using aqueous model electrochemical cells
Dissolution of Ir catalysts varies widely between PEM water electrolysers and aqueous electrolytes. Here, we systematically investigate this finding and propose that stabilization of the catalysts over time and overestimated ionomer acidity are the main contributors to the dissolution discrepancy.
- Julius Knöppel
- , Maximilian Möckl
- & Serhiy Cherevko
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| Open AccessBoosting photocatalytic hydrogen production from water by photothermally induced biphase systems
The solar-driven H2 production from water by particulate photocatalysts is an effective approach to produce H2 fuel. Here, the authors propose an integrated photothermal–photocatalytic biphase system, which lowers the reaction barrier and the delivery resistance of the H2, boosting the catalytic H2 evolution rate.
- Shaohui Guo
- , Xuanhua Li
- & Bingqing Wei
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Article
| Open AccessPhotosynthetic hydrogen production by droplet-based microbial micro-reactors under aerobic conditions
The development of techniques capable of orchestrating the assembly of living cells into multicellular ensembles with synergistic and function is challenge. Here, the authors construct algal or algal/bacterial cells-based core shell-like structure based on aqueous two-phase system for synergic photosynthetic H2 production.
- Zhijun Xu
- , Shengliang Wang
- & Stephen Mann
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Article
| Open AccessGradient tantalum-doped hematite homojunction photoanode improves both photocurrents and turn-on voltage for solar water splitting
Solar-to-fuel conversion represents a renewable means to harvest sunlight, but the most efficient materials are often expensive or rare. Here, authors demonstrate gradient tantalum-doped hematite homojunctions as a method to improve photoelectrochemical water splitting performances.
- Hemin Zhang
- , Dongfeng Li
- & Jae Sung Lee
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Article
| Open AccessBoosting hydrogen evolution on MoS2 via co-confining selenium in surface and cobalt in inner layer
The lack of efficient, inexpensive catalysts hinders large-scale application of hydrogen evolution reaction (HER). Here, the authors report a MoS2 nanofoam catalyst with co-confined Se in the surface and Co in the inner layer, exhibiting high large-current-density HER activity and durability.
- Zhilong Zheng
- , Liang Yu
- & Dehui Deng
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| Open AccessImplanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
Producing H2 from water using electricity and earth-abundant elements is necessary for worldwide renewable fuel production, yet most electrocatalysts have sluggish activities or poor stabilities. Here, authors show vanadium oxide modified copper-doped nickel to enable active and durable H2 evolution.
- Yibing Li
- , Xin Tan
- & Chuan Zhao
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| Open AccessSelf-sustainable protonic ceramic electrochemical cells using a triple conducting electrode for hydrogen and power production
While producing renewable fuel is crucial for a sustainable energy economy, there is still a need for active and durable materials capable of efficient fuel generation and utilization. Here, authors demonstrate a triple-conductive oxide as an oxygen electrode for H2 or electricity production.
- Hanping Ding
- , Wei Wu
- & Dong Ding
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Article
| Open AccessA solution-processable and ultra-permeable conjugated microporous thermoset for selective hydrogen separation
Rigidity, as seen in crosslinked polymers, and plastic processability are mutually exclusive properties. Here, the authors prepare a solution-processable conjugated microporous thermoset with permanent pores and demonstrate its application as a two-dimensional molecular sieving membrane for hydrogen separation.
- Wei Liu
- , Shu-Dong Jiang
- & Kian Ping Loh
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| Open AccessRuthenium anchored on carbon nanotube electrocatalyst for hydrogen production with enhanced Faradaic efficiency
To efficiently produce pure and clean H2 through electrochemical processes, an efficient and durable catalyst is essential. Here, authors report ruthenium nanoparticles anchored on multi-walled carbon nanotubes as an efficient catalyst for H2 evolution in both acidic and alkaline media.
- Do Hyung Kweon
- , Mahmut Sait Okyay
- & Jong-Beom Baek
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| Open AccessReactant friendly hydrogen evolution interface based on di-anionic MoS2 surface
H2 energy as an alternative to fossil fuels requires cost-effective catalysts with fast kinetics for splitting water. Here, authors design MoS2 materials with di-anionic surfaces to improve the electrocatalytic H2 evolution activities.
- Zhaoyan Luo
- , Hao Zhang
- & Junjie Ge
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Article
| Open AccessPt-O bond as an active site superior to Pt0 in hydrogen evolution reaction
While converting water to H2 with a catalyst offers a renewable means to produce carbon-neutral fuels, understanding the catalytic active sites has proven challenging. Here, authors show a structurally well-defined model complex with Pt-O bonding to enable efficient H2 evolution electrocatalysis.
- Fei-Yang Yu
- , Zhong-Ling Lang
- & Yang-Guang Li
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| Open AccessNickel-molybdenum nitride nanoplate electrocatalysts for concurrent electrolytic hydrogen and formate productions
Hydrogen production by electrocatalytic water splitting is limited by the sluggish evolution kinetics of low value-oxygen. Here, authors show concurrent electrolytic productions of H2 and glycerol oxidation to formate by utilizing Ni-Mo-N/CFC electro-catalyst as both anodic and cathodic catalysts.
- Yan Li
- , Xinfa Wei
- & Mingyuan He
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Article
| Open AccessAtomic layer deposited Pt-Ru dual-metal dimers and identifying their active sites for hydrogen evolution reaction
Atomically precise control over elemental distributions presents a challenge in the preparation of catalytic nanomaterials. Here the authors report Pt-Ru bimetallic dimer structures through atomic layer deposition process and identify the roles of Pt and Ru in hydrogen evolution reaction.
- Lei Zhang
- , Rutong Si
- & Xueliang Sun
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Article
| Open AccessCyclic two-step electrolysis for stable electrochemical conversion of carbon dioxide to formate
Reduction of carbon dioxide is promising for the production of value-added chemicals, but electrocatalysts are hindered by carbon monoxide poisoning. Here, the authors alternate reduction and oxidation potentials to achieve stable and selective long-term electrocatalytic reduction of carbon dioxide to formate.
- Chan Woo Lee
- , Nam Heon Cho
- & Byoung Koun Min
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| Open AccessA broadband and strong visible-light-absorbing photosensitizer boosts hydrogen evolution
Converting solar energy to hydrogen fuel requires light-absorbers that well-match the wavelengths of incoming sunlight. Here, authors prepare a broadband visible-light-absorbing molecular complex that efficiently produces hydrogen from water.
- Ping Wang
- , Song Guo
- & Tong-Bu Lu
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Article
| Open AccessBlack phosphorene as a hole extraction layer boosting solar water splitting of oxygen evolution catalysts
Photoelectrochemical water splitting affords an integrated approach for converting light to fuel, but devices typically suffer poor activities and stabilities. Here, authors incorporate black phosphorene into bismuth vanadate photoanodes to boost hole extraction and device lifetimes.
- Kan Zhang
- , Bingjun Jin
- & Jong Hyeok Park
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| Open AccessNitrogen-plasma treated hafnium oxyhydroxide as an efficient acid-stable electrocatalyst for hydrogen evolution and oxidation reactions
Renewable hydrogen technologies are promising for alternative energy, but are encumbered by the kinetics of electrochemical reactions in harsh conditions. Here, authors report nitrogen-modified hafnium oxyhydroxide for electrocatalysis of hydrogen evolution and oxidation reactions in acidic media.
- Xiaofang Yang
- , Fang Zhao
- & Bruce E. Koel
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Article
| Open AccessBoundary activated hydrogen evolution reaction on monolayer MoS2
While water-splitting electrocatalysts enable energy storage in carbon-neutral fuels, a recent challenge has been the discovery and understanding of catalyst active sites. Here, authors find domain boundaries in MoS2 materials to present high-activity, stable, and scalable sites for H2 evolution.
- Jianqi Zhu
- , Zhi-Chang Wang
- & Guangyu Zhang
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| Open AccessAtomically engineering activation sites onto metallic 1T-MoS2 catalysts for enhanced electrochemical hydrogen evolution
While heterogeneous catalysts can act as tangible, efficient materials for energy conversion, understanding the active catalytic sites is challenging. Here, authors engineer specific catalytic sites into molybdenum sulfide to improve and elucidate hydrogen evolution electrocatalysis.
- Yichao Huang
- , Yuanhui Sun
- & Jing Gu
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| Open AccessUnusual synergistic effect in layered Ruddlesden−Popper oxide enables ultrafast hydrogen evolution
Water may serve as a renewable hydrogen fuel source to replace fossil fuels, although such electrolysis requires highly active catalysts. Here, authors explore Ruddlesden−Popper oxides as hydrogen evolution electrocatalysts that feature an unusual synergistic effect to promote high activity.
- Yinlong Zhu
- , Hassan A. Tahini
- & Zongping Shao
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Article
| Open AccessInterfacing nickel nitride and nickel boosts both electrocatalytic hydrogen evolution and oxidation reactions
Efficient hydrogen production and utilization materials will be crucial in order to compete with fossil fuel technologies. Here, authors report nickel and nickel nitride interfaces as effected catalysts for hydrogen evolution and oxidation in water.
- Fuzhan Song
- , Wei Li
- & Yujie Sun
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| Open AccessElectron density modulation of NiCo2S4 nanowires by nitrogen incorporation for highly efficient hydrogen evolution catalysis
The hydrogen evolution reaction is a promising route to produce clean hydrogen fuel; however, its efficient electrolytic generation relies on expensive platinum. Here, the authors show how modulating electron density in a metal sulfide, NiCo2S4, boosts hydrogen desorption to achieve high catalytic activity.
- Yishang Wu
- , Xiaojing Liu
- & Gongming Wang
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| Open AccessElectrochemical generation of sulfur vacancies in the basal plane of MoS2 for hydrogen evolution
In order to fully utilize sulfur vacancies in MoS2 catalysts for industrial applications, a facile and general route for making sulfur vacancies in MoS2 is needed. Here, the authors introduce a scalable route towards generating sulfur vacancies on the MoS2basal plane using electrochemical desulfurization.
- Charlie Tsai
- , Hong Li
- & Frank Abild-Pedersen
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Article
| Open AccessSelf-surface charge exfoliation and electrostatically coordinated 2D hetero-layered hybrids
Synthesis of atomically thin 2D hetero-layered structures remains a challenge. Here, the authors report a scalable approach to fabricating 2D hetero-layered metal chalcogenides of various compositions: self-surface charge exfoliation, followed by electrostatic coupling.
- Min-Quan Yang
- , Yi-Jun Xu
- & Ghim Wei Ho
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| Open AccessCo-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution
Hydrogen evolution by water electrolysis is a promising route to 'green energy', but efficiency is still an issue. Here, the authors make mixed organic/inorganic hierarchical nanostructures with high hydrogen evolution activity, identifying synergic effects in the material contributing to enhanced efficiency.
- Giovanni Valenti
- , Alessandro Boni
- & Francesco Paolucci
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| Open AccessSolar water splitting by photovoltaic-electrolysis with a solar-to-hydrogen efficiency over 30%
In order to be practical for large-scale deployment, the cost of solar hydrogen generation must be significantly reduced. Here, the authors employ a triple-junction solar cell with two series connected polymer electrolyte membrane electrolysers to achieve solar to hydrogen efficiency of 30%.
- Jieyang Jia
- , Linsey C. Seitz
- & Thomas F. Jaramillo
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| Open AccessHybrid bio-photo-electro-chemical cells for solar water splitting
Photoelectrochemical water splitting uses solar power to decompose water to hydrogen and oxygen. Here, the authors integrate thylakoid membranes extracted from spinach into a bio-photo-electro-chemical cell capable of overall water splitting without the need for any sacrificial reagents.
- Roy I. Pinhassi
- , Dan Kallmann
- & Avner Rothschild