Effects of crystal phase and composition on structurally ordered Pt–Co–Ni/C ternary intermetallic electrocatalysts for the formic acid oxidation reaction

Chen, Lingxuan; Zhu, Jing; Xuan, Cuijuan; Xiao, Weiping; Xia, Kedong; Xia, Weiwei; Lai, Chenglong; Xin, Huolin L.; Wang, Deli

doi:10.1039/C7TA11051K

Title: Effects of crystal phase and composition on structurally ordered Pt–Co–Ni/C ternary intermetallic electrocatalysts for the formic acid oxidation reaction

Journal Article · Tue Feb 27 00:00:00 EST 2018 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/C7TA11051K· OSTI ID:1460694

Chen, Lingxuan ^[1]; Zhu, Jing ^[1]; Xuan, Cuijuan ^[1]; Xiao, Weiping ^[1]; Xia, Kedong ^[1]; Xia, Weiwei ^[2]; Lai, Chenglong ^[1]; Xin, Huolin L. ^[3];

^[1]

Huazhong Univ. of Science and Technology, Wuhan (China). Key Lab. of Material Chemistry for Energy Conversion and Storage. Hubei Key Lab. of Material Chemistry and Service Failure. School of Chemistry and Chemical Engineering
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials; Southeast Univ., Nanjing (China). SEU-FEI Nano-Pico Center. Key Lab. of MEMS of the Ministry of Education
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials

In this paper, to enhance the electrocatalytic performance of the formic acid oxidation reaction (FAOR), structurally ordered face-centered tetragonal (fct) Pt–Co–Ni/C intermetallic nanoparticles were synthesized via an impregnation reduction method, followed by post heat-treatment. It was found that an ordered intermetallic PtCo phase prevails rather than PtNi as the principal part for the ternary Pt–Co–Ni alloy after being annealed at high temperature, namely, Ni atoms merely serve as the substitute for Co in the lattice of Pt–Co–Ni intermetallics possessing the same atomic stack as PtCo intermetallics. In addition, there is a limitation for Ni to replace Co for the intermetallic PtCo phase, otherwise, most likely excessive Ni would replace the Pt atoms and damage the atomically ordered structure. Benefiting from the ordered structural features and rational introduction of the third transition metal to modify the distance between Pt and Pt atoms, the Pt–Co–Ni/C ordered intermetallic nanoparticles exhibit an enhancement in catalytic activity for the FAOR compared with Pt/C, the PtNi/C alloy and ordered intermetallic PtCo/C nanoparticles. Furthermore, the presence of Ni in the ordered intermetallic Pt–Co–Ni/C catalyst leads to a noticeable improvement in durability compared with the ordered intermetallic PtCo/C catalyst. Finally, the present work reveals opportunities for the rational design of ternary electrocatalysts with enhanced catalytic performance for fuel cell applications.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States); Huazhong Univ. of Science and Technology, Wuhan (China)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); 1000 Young Talent Program (China); Huazhong Univ. of Science and Technology (China)

Grant/Contract Number:: SC0012704; 21573083; 2017KFYXJJ164

OSTI ID:: 1460694

Report Number(s):: BNL-207823-2018-JAAM

Journal Information:: Journal of Materials Chemistry. A, Vol. 6, Issue 14; ISSN 2050-7488

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 53 works

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