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A Solution‐based Method for Synthesizing Pyrite‐type Ferrous Metal Sulfide Microspheres with Efficient OER Activity
Author(s) -
Xiang Wendi,
Tian Qianqiu,
Zhong Cheng,
Deng Yida,
Han Xiaopeng,
Hu Wenbin
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000504
Subject(s) - overpotential , oxygen evolution , chalcogenide , materials science , catalysis , chemical engineering , sulfide , electrochemical energy conversion , transition metal , electrochemistry , metal , hydrothermal circulation , bimetallic strip , pyrite , nanotechnology , chemistry , metallurgy , electrode , organic chemistry , engineering
Simple and stable synthesis of transition metal sulfides and clarification of their growth mechanisms are of great importance for developing catalysts, metal‐air batteries and other technologies. In this work, we developed a one‐step facile hydrothermal approach to successfully synthesize NiS 2 microspheres. By changing the experimental parameters, the reason that affects the formation of nanostructured spheres is investigated and discussed in detail, and the formation mechanism of microspheres is proposed innovatively. Furthermore, electrochemical testing results show that the 7 h‐NiS 2 catalyst exhibits a remarkable oxygen evolution reaction (OER) activity with an overpotential of 311 mV at 10 mA cm −2 in 1.0 M KOH, superior to precious metal RuO 2 . The NiS 2 catalyst also exhibits a robust durability. This work will contributes to the rational design and the understanding of growth mechanism of transition metal chalcogenide electrocatalysts for diverse energy conversion technologies.