An amorphous FeMoS4 nanorod array toward efficient hydrogen evolution electrocatalysis under neutral conditions

Xiang Ren; Weiyi Wang; Ruixiang Ge; Shuai Hao; Fengli Qu; Gu Du; Abdullah M. Asiri; Qin Wei; Liang Chen; Xuping Sun

doi:10.1039/C7CC03702C

An amorphous FeMoS₄ nanorod array toward efficient hydrogen evolution electrocatalysis under neutral conditions†

Xiang Ren,^ab Weiyi Wang,^a Ruixiang Ge,^ac Shuai Hao,^a Fengli Qu,

^d Gu Du,^e Abdullah M. Asiri,

^f Qin Wei,

^b Liang Chen*^c and Xuping Sun

*^a

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* Corresponding authors

^a College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
E-mail: sunxp@scu.edu.cn

^b Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, China

^c Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Science, Ningbo 315201, Zhejiang, China
E-mail: chenliang@nimte.ac.cn

^d College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China

^e Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, Sichuan, China

^f Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia

Abstract

It is highly attractive to develop efficient hydrogen-evolving electrocatalysts under neutral conditions. In this communication, we report an amorphous FeMoS₄ nanorod array on carbon cloth (FeMoS₄ NRA/CC) prepared by hydrothermal treatment of an FeOOH nanorod array on carbon cloth (FeOOH NRA/CC) in (NH₄)₂MoS₄ solution. As a 3D electrode for hydrogen evolution electrocatalysis, this FeMoS₄ NRA/CC demonstrates superior catalytic activity and strong long-term electrochemical durability in 1.0 M phosphate buffered saline (pH: 7). It needs an overpotential of 204 mV to drive a geometrical current density of 10 mA cm⁻², which is 450 mV less than that for FeOOH NRA/CC. Density functional theory calculations suggest that FeMoS₄ has a more favourable hydrogen adsorption free energy than FeOOH.

Chemical Communications

An amorphous FeMoS₄ nanorod array toward efficient hydrogen evolution electrocatalysis under neutral conditions†

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