CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Local Coordination and Ordering Engineering to Design Efficient Core-Shell Oxygen Reduction Catalysts
Chen, HQ; Zheng, TL; He, QG; Shang, LA; Wang, GJ; Wang, Q; Wang, XJ; Shi, XB; Gu, M; Jiang, Z
2020
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
Volume167Issue:14Pages:-
Subtype期刊论文
AbstractFor most core-shell nanostructured Pt-based alloy electrocatalysts, the local environment and configuration of surface Pt layers are randomly generated, which would hinder the further improvement of the utilization, activity and stability of Pt atoms. Herein, we have selected AuCu alloys with different structural ordering as substrates and deposited a Pt shell on their surface via the precise control of replacing Cu with Pt atoms. Various physical and electrochemical characterizations indicate that the structural ordering of an AuCu core could influence the distribution of surface Pt atoms due to the rearrangement of surface atoms. After optimization, the obtained catalysts displayed a high mass activity (0.75 Amg(Pt)(-1)) and specific activity (0.491 mAcm(Pt)(-2)) for the oxygen reduction reaction (ORR), which were nearly 7.5 times and 3.6 times those of commercial Pt/C, respectively. In addition, the catalysts could also exhibit a high stability with a negligible activity decay after 10,000 cycles of accelerated durability tests (ADTs). The density functional theory (DFT) calculation reveals that the precisely controlled Pt local environment could lower the Gibbs free energy barrier for the rate-determining step of ORR more than a random distribution could, thus enhancing the catalytic performance of the prepared catalysts.
KeywordHIGH-PERFORMANCE PLATINUM ALLOY AUCU ELECTROCATALYSTS NANOPARTICLES CONVERSION STABILIZATION PT3NI SKIN
DOI10.1149/1945-7111/abc1a5
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32979
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China
2.Ningbo Tech Univ, Sch Biol & Chem Engn, Ningbo 315100, Peoples R China
3.Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Zhejiang, Peoples R China
4.Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China
5.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
6.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
Recommended Citation
GB/T 7714
Chen, HQ,Zheng, TL,He, QG,et al. Local Coordination and Ordering Engineering to Design Efficient Core-Shell Oxygen Reduction Catalysts[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2020,167(14):-.
APA Chen, HQ.,Zheng, TL.,He, QG.,Shang, LA.,Wang, GJ.,...&Jiang, Z.(2020).Local Coordination and Ordering Engineering to Design Efficient Core-Shell Oxygen Reduction Catalysts.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,167(14),-.
MLA Chen, HQ,et al."Local Coordination and Ordering Engineering to Design Efficient Core-Shell Oxygen Reduction Catalysts".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 167.14(2020):-.
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