Composition tunable ternary Pt–Ni–Co octahedra for optimized oxygen reduction activity

Zipeng Zhao; Miao Feng; Jihan Zhou; Zeyan Liu; Mufan Li; Zheng Fan; Oshton Tsen; Jianwei Miao; Xiangfeng Duan; Yu Huang

doi:10.1039/C6CC06165F

Composition tunable ternary Pt–Ni–Co octahedra for optimized oxygen reduction activity†

Zipeng Zhao,‡^a Miao Feng,

‡^ab Jihan Zhou,^c Zeyan Liu,^a Mufan Li,^e Zheng Fan,^a Oshton Tsen,^a Jianwei Miao,^cd Xiangfeng Duan^de and Yu Huang*^ad

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* Corresponding authors

^a Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA
E-mail: yhuang@seas.ucla.edu

^b College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350116, China

^c Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA

^d California Nanosystems Institute, University of California, Los Angeles, California 90095, USA

^e Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA

Abstract

Herein, we report a one-step synthesis method for octahedral Pt–Ni–Co ternary catalysts with tunable compositions and fixed shapes. Impressively, the composition optimized octahedral PtNi_0.55Co_0.1/C demonstrated a significant improvement in ORR activity compared to those of previously reported Pt–Ni–Co alloy octahedra, showing an outstanding specific activity of 5.05 mA cm⁻² and a mass activity of 2.80 mA μg_Pt⁻¹, which are around 20.2 times and 14.7 times higher than those of the commercial Pt/C catalyst (0.25 mA cm⁻² and 0.19 mA μg_Pt⁻¹).

Chemical Communications

Composition tunable ternary Pt–Ni–Co octahedra for optimized oxygen reduction activity†

Abstract

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Composition tunable ternary Pt–Ni–Co octahedra for optimized oxygen reduction activity

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