High-performance transition metal-doped Pt3Ni octahedra for oxygen reduction reaction

被引：1710

作者：

Huang, Xiaoqing ^{[1
,2
]}

Zhao, Zipeng ^{[1
,2
]}

Cao, Liang ^{[3
]}

Chen, Yu ^{[1
,2
]}

Zhu, Enbo ^{[1
,2
]}

Lin, Zhaoyang ^{[4
]}

Li, Mufan ^{[4
]}

Yan, Aiming ^{[5
,6
,7
,8
,9
]}

Zettl, Alex ^{[5
,6
,7
,8
,9
]}

Wang, Y. Morris ^{[10
]}

Duan, Xiangfeng ^{[2
,4
]}

Mueller, Tim ^{[11
]}

Huang, Yu ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Calif NanoSyst Inst CNSI, Los Angeles, CA 90095 USA

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[5] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[6] Univ Calif Berkeley, Ctr Integrated Nanomech Syst, Berkeley, CA 94720 USA

[7] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[8] Univ Calif Berkeley, Kavli Energy NanoSci Inst, Berkeley, CA 94720 USA

[9] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[10] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA

[11] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

来源：

SCIENCE | 2015年 / 348卷 / 6240期

基金：

美国国家科学基金会;

关键词：

ALLOY NANOPARTICLES; PLATINUM; NANOCRYSTALS; NI; CATALYSIS; STRATEGY;

D O I：

10.1126/science.aaa8765

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Bimetallic platinum-nickel (Pt-Ni) nanostructures represent an emerging class of electrocatalysts for oxygen reduction reaction (ORR) in fuel cells, but practical applications have been limited by catalytic activity and durability. We surface-doped Pt3Ni octahedra supported on carbon with transition metals, termed M-Pt3Ni/C, where M is vanadium, chromium, manganese, iron, cobalt, molybdenum (Mo), tungsten, or rhenium. The Mo-Pt3Ni/C showed the best ORR performance, with a specific activity of 10.3 mA/cm(2) and mass activity of 6.98 A/mg(Pt), which are 81- and 73-fold enhancements compared with the commercial Pt/C catalyst (0.127 mA/cm(2) and 0.096 A/mg(Pt)). Theoretical calculations suggest that Mo prefers subsurface positions near the particle edges in vacuum and surface vertex/edge sites in oxidizing conditions, where it enhances both the performance and the stability of the Pt3Ni catalyst.

引用

页码：1230 / 1234

页数：5

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