Controllable design of nanoworm-like nickel sulfides for efficient electrochemical water splitting in alkaline media

被引：51

作者：

Chen, Z. ^{[1
]}

Ibrahim, I. ^{[1
]}

Hao, D. ^{[1
]}

Liu, X. ^{[1
]}

Wu, L. ^{[1
]}

Wei, W. ^{[1
]}

Su, D. ^{[2
]}

Ni, B. -J. ^{[1
]}

机构：

[1] Univ Technol Sydney, Ctr Technol Water & Wastewater, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

[2] Univ Technol Sydney, Ctr Clean Energy Technol, Sch Math & Phys Sci, Fac Sci, Sydney, NSW 2007, Australia

来源：

MATERIALS TODAY ENERGY | 2020年 / 18卷

基金：

澳大利亚研究理事会;

关键词：

Sulfide; Morphology; Solvothermal synthesis; Oxygen evolution reaction; Overall water splitting; ELECTROCATALYSTS; HYDROGEN; FOAM; ELECTRODE; HYDROXIDE;

D O I：

10.1016/j.mtener.2020.100573

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Developing cost-effective electrocatalysts for electrochemical water splitting (EWS) is appealing and challenging for sustainable water electrolysis. Currently, nickel sulfides are considered as promising candidates for EWS due to their low cost and high catalytic activity. However, the facile design of nickel sulfides with high catalytic performance is still highly demanded. In this study, we have developed a onestep solvothermal strategy to construct nickel sulfides as efficient water splitting catalysts. By taking advantage of the small size, abundant active sites, large electrochemical surface area, and good conductivity, the nanoworm-like nickel sulfides (NiS-NW/Ni foam [NF]) exhibit better oxygen evolution reaction performance (a low overpotential of 279 mV to achieve 100 mA cm(-2), Tafel slope of 38.44 mV dce(-1)) than the nanoplate-like analogs, as well as most of reported nickel sulfide-based electrocatalysts. In addition, the NiS-NW/NF directly used as bifunctional electrodes for overall water splitting requires a low voltage of 1.563 V to attain a current density of 10 mA cm(-2) with good long-term durability. This work provides a facile strategy for the design of efficient nickel sulfide-based electrocatalysts for energy conversion applications. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：7