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.
基金
financially funded by the Natural Science Foundation of Ningbo(No.2022J139)
the Ningbo Yongjiang Talent Introduction Programme(No.2022A-227-G)
the National Natural Science Foundation of China(No.51972178)
the financial support from Scientific and Technological Bases and Talents of Guangxi(Guike AD21075051)
the National Natural Science Foundation of China(12174075)
the special fund for“Guangxi Bagui Scholars”
support by ERC-CZ program(project LL2101)from the Ministry of Education Youth and Sports(MEYS)
by the project Advanced Functional Nanorobots(reg.No.CZ.02.1.01/0.0/0.0/15_003/0000444 financed by the EFRR)
作者简介
Zhentao Du,Dr.,E-mail:zhentaodu@126.com;Jiang Zhong,Dr;Yanqing Fu,Dr;Lan Jiang,Prof;Qiliang Wei,Prof.,E-mail:qiliang.wei@nbut.edu.cn;Weiyou Yang,Prof.,E-mail:weiyouyang@tsinghua.org.cn;Jan Luxa,Prof;Bing Wu,Dr;Zdenek Sofer,Prof.
