Reconstructing cobalt disulfide nanosheets through sulfur doping hexamethylenetetramine regulatedβ-Co(OH)_(2) for oxygen evolution reaction  

作　　者：Xiangtai Zhang Lei Wu 

机构地区：[1]Laboratory Management Office of Qinghai University,Qinghai University,Xining 810016,China [2]School of Chemistry and Chemical Engineering,Qinghai University,Xining 810016,China [3]School of Energy and Electrical Engineering,Qinghai University,Xining 810016,China

出　　处：《Frontiers of Chemical Science and Engineering》2025年第3期107-116,共10页化学科学与工程前沿(英文版)

基　　金：supported by the Youth Fund of Qinghai University(Grant No.2019-QGY-9).

摘　　要：Exploiting advanced transition metal based electrocatalysts is critical for the oxygen evolution reaction(OER)due to their high efficiency in an alkaline environment for water splitting.Herein,CoS_(2)nanosheets were synthesized through simple hydrothermal process and sulfurized layeredβ-Co(OH)_(2)nanosheets as a precursor.The regulation strategy of hexamethylenetetramine was employed to create layered single-crystalβ-Co(OH)_(2)nanosheets.X-ray absorption fine structure indicates the crystal phase reconstructions occur onβ-Co(OH)_(2)surface during the sulfidation reaction.The sulfurizedβ-Co(OH)_(2)nanosheets present an overpotential of only 297 mV to reach 10 mA·cm^(-2),a low Tafel slope of 71.7 mV·dec^(-1)and excellent stability for OER.The results clarified that the CoS_(2)nanosheets excellent OER performance is attributable to cobalt sulfide sheet structure and structural changes by sulfur dopants.The results of the sulfurized layeredβ-Co(OH)_(2)to produce CoS_(2)nanosheets indicate that this strategy may represents a potential replacement for oxygen evolution application,particularly for the largescale production of water splitting catalysts.

关 键 词：SULFIDATION β-cobalt hydroxide cobalt disulfide ELECTROCATALYSIS oxygen evolution reaction 

分 类 号：O643.36[理学—物理化学]