Featured
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Perspective |
Designing the next generation of proton-exchange membrane fuel cells
This Perspective reviews the recent technical developments in the components of the fuel cell stack in proton-exchange membrane fuel cell vehicles and outlines the road towards large-scale commercialization of such vehicles.
- Kui Jiao
- , Jin Xuan
- & Michael D. Guiver
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Article |
Thermal-expansion offset for high-performance fuel cell cathodes
Highly active but durable perovskite-based solid oxide fuel cell cathodes are realized using a thermal-expansion offset, achieving full thermo-mechanical compatibility between the cathode and other cell components.
- Yuan Zhang
- , Bin Chen
- & Zongping Shao
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Article |
A stable low-temperature H2-production catalyst by crowding Pt on α-MoC
A stable, low-temperature water–gas shift catalyst is achieved by crowding platinum atoms and clusters on α-molybdenum carbide; the crowding protects the support from oxidation that would cause catalyst deactivation.
- Xiao Zhang
- , Mengtao Zhang
- & Ding Ma
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Letter |
Velocity-resolved kinetics of site-specific carbon monoxide oxidation on platinum surfaces
The catalytic oxidation of carbon monoxide over platinum proceeds through two distinct channels: it is dominated at low temperatures by the more active step sites and at high temperatures by the more abundant terrace sites of the platinum surface.
- Jannis Neugebohren
- , Dmitriy Borodin
- & Theofanis N. Kitsopoulos
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Letter |
Highly durable, coking and sulfur tolerant, fuel-flexible protonic ceramic fuel cells
Tests on a versatile protonic ceramic fuel cell resistant to carbon deposition and sulfur poisoning show that its durability and the wide range of fuels it can accept make it suitable for use in industry in the near future.
- Chuancheng Duan
- , Robert J. Kee
- & Ryan O’Hayre
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Letter |
Switching on electrocatalytic activity in solid oxide cells
A new way of activating the electrodes in solid oxide cells involves applying an electrical potential to trigger the exsolution of metal catalysts to the electrode surface; the success of this technique raises the possibility of regenerating the electrodes during operation.
- Jae-ha Myung
- , Dragos Neagu
- & John T. S. Irvine
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Letter |
Strongly correlated perovskite fuel cells
A fundamentally different approach to designing solid oxide electrolytes is presented, using a phase transition to suppress electronic conduction in a correlated perovskite nickelate; this yields ionic conductivity comparable to the best-performing solid electrolytes in the same temperature range.
- You Zhou
- , Xiaofei Guan
- & Shriram Ramanathan
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Letter |
Nanocrack-regulated self-humidifying membranes
Nanometre-scale cracks in a hydrophobic surface coating applied to hydrocarbon proton-exchange fuel-cell membranes work as tiny valves, delaying water desorption and maintaining ion conductivity in the membrane on dehumidification.
- Chi Hoon Park
- , So Young Lee
- & Young Moo Lee
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Review Article |
Electrocatalyst approaches and challenges for automotive fuel cells
Although automotive fuel-cell catalyst development has come a long way in the past fifteen years, more research is needed for oxygen reduction electrocatalysts to be successfully commercialized.
- Mark K. Debe
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News Feature |
Hydrogen vehicles: Fuel of the future?
Hydrogen fuel-cell vehicles, largely forgotten as attention turned to biofuels and batteries, are staging a comeback. Jeff Tollefson investigates.
- Jeff Tollefson
Revitalizing interface in protonic ceramic cells by acid etch