Results 41 to 50 of about 38,234 (262)

Simultaneously Promoting Proton Conductivity and Mechanical Stability of SPEEK Membrane by Incorporating Porous g–C₃N₄

Membranes
Proton exchange membranes are widely used in environmentally friendly applications such as fuel cells and electrochemical hydrogen compression. In these applications, an ideal proton exchange membrane should have both excellent proton conductivity and ...
Xiaoyao Wang, Benbing Shi
doaj   +1 more source

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source

Effect of environmental condition on essential work of fracture of proton exchange membranes

Mechanical Engineering Journal, 2015
The essential work of fracture (EWF) is a key property in understanding the fracture resistance in polymer membranes. As such, it is a promising approach when investigating the fracture resistance of proton exchange membrane in fuel cells.
Thibaud VERMOT DES ROCHES, Yuki ARAI, Masaki OMIYA   +2 more
doaj   +1 more source

Low Pt loading for high-performance fuel cell electrodes enabled by hydrogen-bonding microporous polymer binders

Nature Communications, 2022
Lowering the Pt loading while maintaining high fuel-cell performance is an important but difficult task. Here the authors report modified polymers with intrinsic microporosity as binder for preferential retention of phosphoric acid in the catalyst layer,
Hongying Tang, Kang Geng, David Aili, Qing Ju, Ji Pan, Ge Chao, Xi Yin, Xiang Guo, Qingfeng Li, Nanwen Li   +9 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Performance Assessment and Parametric Design of a Combined System Consisting of High-Temperature Proton Exchange Membrane Fuel Cell and Absorption Refrigerator

International Journal of Electrochemical Science, 2019
A theoretical model of a combined system composed of a high-temperature proton exchange membrane fuel cell (HT-PEMFC), a regenerator and an absorption refrigerator (APR) is established, where the APR is used to absorber the waste heat from HT-PEMFC for ...
Yuan Han, Xinru Guo, Houcheng Zhang, Ziyang Hu, Shujin Hou   +4 more
doaj   +1 more source

Sulfonated poly (fluorenyl ether ketone nitrile) membranes used for high temperature PEM fuel cell

Heliyon, 2020
A series of sulfonated poly (fluorenyl ether ketone nitrile)s with different equivalent weights (EW) ranging from 681 to 369 g mequiv.−1 were used to assemble a series of single proton exchange membrane fuel cells (PEMFC) in their turns.
Yingnan Zou, Mei Yang, Guoqing Liu, Chungang Xu   +3 more
doaj   +1 more source

Protic ionic liquid-grafted polybenzimidazole as proton conducting catalyst binder for high-temperature proton exchange membrane fuel cells

Polymer Testing, 2021
Development of suitable catalyst binder with reasonable proton conductivity is of great importance for improving catalytic performance of oxygen reduction reactions of platinum-based catalysts. Herein, we report that polybenzimidazole grafted with protic
Jingjing Guo, Ailian Wang, Wenxi Ji, Taoyi Zhang, Haolin Tang, Haining Zhang   +5 more
doaj   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Reevaluating the Activity of ZIF‐8 Based FeNCs for Electrochemical Ammonia Production

Advanced Functional Materials, EarlyView.
Though receiving much attention, the field of electrochemical nitrogen reduction reaction (eNRR) to ammonia is marked by doubts about whether this reaction is possible in aqueous media. This work sheds light on this question for iron single‐atom on N‐doped carbon (FeNC) catalysts—a class of well‐known catalysts that is also worth testing for the sister
Caroline Schneider, S. Esmael Balaghi, Niklas Ortlieb, Patrick Elsaesser, Sima Heidari, Christopher S. Allen, Anna Fischer   +6 more
wiley   +1 more source