High-Performance Anion Exchange Membrane Fuel Cells Enabled by Nitrogen Configuration Optimization in Graphene-Coated Nickel for Enhanced Hydrogen Oxidation

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外文摘要：Anion exchange membrane fuel cell(AEMFC)technology is attracting intensive attention,due to its great potential by using non-precious-metal catalysts(NPMCs)in the cathode and cheap bipolar plate materials in alkaline media.However,in such case,the kinetics of hydrogen oxidation reaction(HOR)in the anode is two orders of magnitude sluggish than that of acidic electrolytes,which is recognized as the grand challenge in this field.Herein,we report the rationally designed Ni nanoparticles encapsulated by N-doped graphene layers(Ni@NG)using a facile pyrolysis strategy.Based on the density functional theory calculations and electrochemical performance analysis,it is witnessed that the rich Pyridinic-N within the graphene shell optimizes the binding energy of the intermediates,thus enabling the fundamentally enhanced activity for HOR with robust stability.As a proof of concept,the resultant Ni@NG sample as the anode with a low loading(1.8 mg cm-2)in AEMFCs delivers a high peak power density of 500 mW cm-2,outperforming all of those of NPMC-based analogs ever reported.

外文关键词：

anion-exchange-membrane fuel cellsdensity functional calculationshydrogen oxidation reactionNi-based non-precious-metal catalystspyridinic N-doped graphene

作者：

Pan Li、Jiang Zhong、Yanqing Fu、Zhentao Du、Lan Jiang、Yi Han、Jan Luxa、Bing Wu、Zdenek Sofer、Qiliang Wei、Weiyou Yang

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作者单位：

School of Resources,Environment and Materials,State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University,Nanning 530004,China

Institute of Micro/Nano Materials and Devices,Ningbo University of Technology,Ningbo 315211,China

Department of Inorganic Chemistry,University of Chemistry and Technology Prague,Technická 5,166 28,Prague 6,Czech Republic

基金：

Natural Science Foundation of NingboNingbo Yongjiang Talent Introduction ProgrammeNational Natural Science Foundation of ChinaScientific and Technological Bases and Talents of GuangxiNational Natural Science Foundation of Chinaspecial fund for"Guangxi Bagui Scholars."ERC-CZ program from the Ministry of Education Youth and Sports(MEYS)project Advanced Functional Nanorobots financed by the EFRR

项目编号：

2022J1392022A-227-G51972178Guike AD2107505112174075LL2101CZ.02.1.01/0.0/0.0/15_003/0000444

出版年：

2024

DOI：

10.1002/eem2.12716

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(5)