Tuning the electronic structure of PtRu bimetallic nanoparticles for promoting the hydrogen oxidation reaction in alkaline media

Chang Long; Kun Wang; Yanan Shi; Zhongjie Yang; Xiaofei Zhang; Yin Zhang; Jianyu Han; Yini Bao; Lin Chang; Shaoqin Liu; Zhiyong Tang

doi:10.1039/C9QI00942F

Tuning the electronic structure of PtRu bimetallic nanoparticles for promoting the hydrogen oxidation reaction in alkaline media†

Chang Long,

‡^abc Kun Wang,‡^c Yanan Shi,^c Zhongjie Yang,^c Xiaofei Zhang,^abc Yin Zhang,^c Jianyu Han,^c Yini Bao,^d Lin Chang,^c Shaoqin Liu

*^ab and Zhiyong Tang

*^c

Author affiliations

* Corresponding authors

^a School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, P. R. China

^b MOE Key Laboratory of Micro-systems and Micro-structures Manufacturing, Harbin Institute of Technology, Harbin 150080, P. R. China
E-mail: shaoqinliu@hit.edu.cn

^c CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
E-mail: zytang@nanoctr.cn

^d West China Hospital of Stomatology, Sichuan University, Chengdu 610041, PR China

Abstract

Optimization of the hydrogen binding energy by controlling the surface electronic structure of electrocatalysts is of great significance in the hydrogen oxidation reaction (HOR) in alkaline electrolytes. Herein, we demonstrated that the surface electronic structure of PtRu bimetallic nanoparticles could be finely tuned through the alloying degree; this led to enhanced HOR performance in an alkaline solution. The optimized Pt_0.65Ru_0.35 with high alloying degree exhibited the exchange current density of 4.16 A m⁻², which was about 1.5 and 2.2 times those of Pt_0.74Ru_0.26 with a low alloying degree (2.75 A m⁻²) and Pt/C (1.89 A m⁻²), respectively.

Inorganic Chemistry Frontiers

Tuning the electronic structure of PtRu bimetallic nanoparticles for promoting the hydrogen oxidation reaction in alkaline media†

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Tuning the electronic structure of PtRu bimetallic nanoparticles for promoting the hydrogen oxidation reaction in alkaline media

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