CoS(2x)Se(2(1-x)) nanowire array: an efficient ternary electrocatalyst for the hydrogen evolution reaction

Kaili Liu; Fengmei Wang; Kai Xu; Tofik Ahmed Shifa; Zhongzhou Cheng; Xueying Zhan; Jun He

doi:10.1039/c5nr07735d

CoS(2x)Se(2(1-x)) nanowire array: an efficient ternary electrocatalyst for the hydrogen evolution reaction

Nanoscale. 2016 Feb 28;8(8):4699-704. doi: 10.1039/c5nr07735d.

Authors

Kaili Liu¹, Fengmei Wang², Kai Xu², Tofik Ahmed Shifa², Zhongzhou Cheng³, Xueying Zhan³, Jun He³

Affiliations

¹ CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, 100190, Beijing, P. R. China. hej@nanoctr.cn and University of Chinese Academy of Science, No.19AYuquan Road, Beijing 100049, China and Sino-Danish Center for Education and Research, Beijing, 100190, China.
² CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, 100190, Beijing, P. R. China. hej@nanoctr.cn and University of Chinese Academy of Science, No.19AYuquan Road, Beijing 100049, China.
³ CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, 100190, Beijing, P. R. China. hej@nanoctr.cn.

PMID: 26853684
DOI: 10.1039/c5nr07735d

Abstract

Binary transition metal dichalcogenides (TMDs) have emerged as efficient catalysts for the hydrogen evolution reaction (HER). Co-based TMDs, such as CoS2 and CoSe2, demonstrate promising HER performance due to their intrinsic metallic nature. Recently, the ternary electrocatalysts were widely acknowledged for their prominent efficiency as compared to their binary counterparts due to increased active sites caused by the incorporation of different atoms. Herein, we successfully grew the ternary CoS2xSe2(1-x) (x = 0.67) nanowires (NWs) on a flexible carbon fiber. As a superior electrocatalyst, ternary CoS2xSe2(1-x) NWs arrays demonstrated excellent catalytic activity for electrochemical hydrogen evolution in acidic media, achieving current densities of 10 mA cm(-2) and 100 mA cm(-2) at overpotentials of 129.5 mV and 174 mV, respectively. Notably, the high stability of CoS2xSe2(1-x) NWs suggested that the ternary CoS2xSe2(1-x) NWs are a scalable catalyst for electrochemical hydrogen evolution.

Publication types

Research Support, Non-U.S. Gov't