Tuning the electrocatalytic activity of Pt by structurally ordered PdFe/C for the hydrogen oxidation reaction in alkaline media

Weiping Xiao; Wen Lei; Jie Wang; Guoying Gao; Tonghui Zhao; Macro A. L. Cordeiro; Ruoqian Lin; Mingxing Gong; Xuyun Guo; Eli Stavitski; Huolin L. Xin; Ye Zhu; Deli Wang

doi:10.1039/C8TA03250E

Tuning the electrocatalytic activity of Pt by structurally ordered PdFe/C for the hydrogen oxidation reaction in alkaline media†

Weiping Xiao,‡^a Wen Lei,‡^a Jie Wang,^c Guoying Gao,

^d Tonghui Zhao,^a Macro A. L. Cordeiro,^b Ruoqian Lin,^b Mingxing Gong,^a Xuyun Guo,

^c Eli Stavitski,^e Huolin L. Xin,^b Ye Zhu^c and Deli Wang

*^a

Author affiliations

* Corresponding authors

^a Key Laboratory of Material Chemistry for Energy Conversion and Storage, Huazhong University of Science and Technology, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, China
E-mail: wangdl81125@hust.edu.cn

^b Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA

^c Department of Applied Physics, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong

^d School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

^e National Synchrotron Light Source II (NSLS-II), Brookhaven National Laboratory, Upton, NY, USA

Abstract

Tuning the hydrogen adsorption energy (E_H) by controlling the surface electronic structure of Pt is essential for enhancing the hydrogen oxidation reaction (HOR) performance in alkaline media. This could be achieved by forming a Pt skin on PdFe/C nanoparticles with structurally ordered intermetallic (O-PdFe@Pt/C) or disordered alloy (D-PdFe@Pt/C). The HOR activity on O-PdFe@Pt/C exhibits an exchange current density of 1.49 A mg_Pt⁻¹, which is 3.87 and 7.56 times higher than that on D-PdFe@Pt/C (0.385 A mg_Pt⁻¹) and Pt/C (0.197 A mg_Pt⁻¹), respectively. The excellent electrocatalytic HOR performance on O-PdFe@Pt/C can be ascribed to the attenuation of E_H on the Pt shell induced by the structurally ordered PdFe core, where the E_H on O-PdFe@Pt surface is 0.18 eV smaller than that on Pt according to DFT calculations.

Journal of Materials Chemistry A

Tuning the electrocatalytic activity of Pt by structurally ordered PdFe/C for the hydrogen oxidation reaction in alkaline media†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Tuning the electrocatalytic activity of Pt by structurally ordered PdFe/C for the hydrogen oxidation reaction in alkaline media

Social activity

Search articles by author

Spotlight

Advertisements