Issue 20, 2019

Controlled synthesis of bifunctional particle-like Mo/Mn-NixSy/NF electrocatalyst for highly efficient overall water splitting

Abstract

Heteroatom-doping engineering has been recognized as an effective strategy to improve the activity and stability of electrocatalytic materials. Herein, we fabricated a bimetallic Mo/Mn codoped three-phase nickel sulfide on Ni foam, with Mo/Mn-NixSy/NF successfully synthesized via hydrothermal synthesis and calcination. In order to better explore the codoping effect of Mo/Mn, we also synthesised Ni3S2/NF, NiS@Ni0.96S/NF, Mo-Ni3S2/NF and Mn-NiS@Ni0.96S/NF and their electrocatalytic activities (HER, OER, and overall water splitting) were systematically investigated. As expected, Mo/Mn-NixSy/NF catalysts exhibited excellent catalytic activities and long-term durability. High electrochemical performance of Mo/Mn-NixSy/NF exceeded that of most reported non-precious metal catalysts and also benchmark RuO2, IrO2 and Pt/C. Moreover, in order to better understand the catalytic process, three possible mechanisms were further proposed to rationalize the enhanced electrocatalytic performance. Our work might broaden the avenue to construct efficient non-precious bifunctional catalysts and further develop large-scale electricity-to-hydrogen applications.

Graphical abstract: Controlled synthesis of bifunctional particle-like Mo/Mn-NixSy/NF electrocatalyst for highly efficient overall water splitting

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
05 Mar 2019
Accepted
25 Mar 2019
First published
25 Mar 2019

Dalton Trans., 2019,48, 6718-6729

Controlled synthesis of bifunctional particle-like Mo/Mn-NixSy/NF electrocatalyst for highly efficient overall water splitting

Y. Gong, Y. Zhi, Y. Lin, T. Zhou, J. Li, F. Jiao and W. Wang, Dalton Trans., 2019, 48, 6718 DOI: 10.1039/C9DT00957D

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