Ultrafine ordered L12-Pt-Co-Mn ternary intermetallic nanoparticles as high-performance oxygen-reduction electrocatalysts for practical fuel cells

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外文摘要：The long-range periodically ordered atomic structures in intermetallic nanoparticles(INPs)can signifi-cantly enhance both the electrocatalytic activity and electrochemical stability toward the oxygen reduc-tion reaction(ORR)compared to the disordered atomic structures in ordinary solid-solution alloy NPs.Accordingly,through a facile and scalable synthetic method,a series of carbon-supported ultrafine Pt3CoxMn1-x ternary INPs are prepared in this work,which possess the"skin-like"ultrathin Pt shells,the ordered L12 atomic structure,and the high-even dispersion on supports(L12-Pt3CoxMn1-x/sPt INPs/C).Electrochemical results present that the composition-optimized L12-Pt3Co0.7Mn0.3/sPt INPs/C exhibits the highest electrocatalytic activity among the series,which are also much better than those of the pris-tine ultrafine Pt/C.Besides,it also has a greatly enhanced electrochemical stability.In addition,the effects of annealing temperature and time are further investigated.More importantly,such superior ORR elec-trocatalytic performance of L12-Pt3Co0.7Mn03/sPt INPs/C are also well demonstrated in practical fuel cells.Physicochemical characterization analyses further reveal the major origins of the greatly enhanced ORR electrocatalytic performance:the Pt-Co-Mn alloy-induced geometric and ligand effects as well as the extremely high L12 atomic-ordering degree.This work not only successfully develops a highly active and stable ordered ternary intermetallic ORR electrocatalyst,but also elucidates the corresponding"structure-function"relationship,which can be further applied in designing other intermetallic(electro)catalysts.

外文关键词：

PlatinumCobaltManganeseOxygen reduction reactionOrdered intermetallicL12 atomic structureProton-exchange membrane fuel cell

作者：

Enping Wang、Liuxuan Luo、Yong Feng、Aiming Wu、Huiyuan Li、Xiashuang Luo、Yangge Guo、Zehao Tan、Fengjuan Zhu、Xiaohui Yan、Qi Kang、Zechao Zhuang、Daihui Yang、Shuiyun Shen、Junliang Zhang

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作者单位：

China-UK Low Carbon College,Shanghai Jiao Tong University,Shanghai 201306,China

Institute of Fuel Cells,Key Laboratory for Power Machinery and Engineering of MOE,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

State Key Laboratory of Advanced Chemical Power Sources,Guizhou Meiling Power Sources Co.,Ltd.,Zunyi 563003,Guizhou,China

School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China

Shanghai Tangfeng Energy Technology Co.Ltd.,Shanghai 201306,China

Institute of New Energy for Vehicles,School of Materials Science and Engineering,Tongji University,Shanghai 201804,China

Department of Chemical Engineering,Columbia University,NY 10027,USA

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基金：

National Key Research and Development Program of ChinaScience and Technology Commission of Shanghai MunicipalityOceanic Interdisciplinary Program of Shanghai Jiao Tong University

项目编号：

2021YFB400130121DZ1208600SL2021ZD105

出版年：

2024

DOI：

10.1016/j.jechem.2024.01.054

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.93(6)

参考文献量64