Ultrathin, Porous CoPS Nanosheets: GO Self-Sacrificing Template Synthesis as Bifunctional Catalysts for Overall Water Splitting

doi:10.1021/acsaem.1c01929

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	Ultrathin, Porous CoPS Nanosheets: GO Self-Sacrificing Template Synthesis as Bifunctional Catalysts for Overall Water Splitting
	Zhao, Wenhua 2; Wu, Niandu 2; Yu, Fan 2; Zhou, Boye 2; Chu, Xueyuan 2; Wei, Zhiqiang 1; Yang, Shaoguang 2
刊名	ACS APPLIED ENERGY MATERIALS
	2021-09-28
卷号	4 期号:10 页码:10976-10985
关键词	overall water splitting bifunctional electrocatalyst CoPS nanosheets graphene oxide sacrificial template
ISSN号	2574-0962
DOI	10.1021/acsaem.1c01929
英文摘要	The exploitation of low-cost, porous, and ultrathin 2D electrocatalysts in the bifunctional electrocatalysis reaction and overall water splitting is a meaningful route to renewable energy technologies. Herein, as efficient bifunctional electrocatalysts toward the water-splitting process, the desirable cobalt phospho-sulfide (CoPS) nanosheets stem from Co2+ cross-linking to form strong coordination bonds with negatively charged oxygen-containing functional groups on a graphene oxide (GO) sacrificial template via electrostatic interactions. The prepared CoPS catalyst exhibits a distinguished electrochemical performance with a low overpotential (eta) of hydrogen evolution reaction (similar to 52 mV) and oxygen evolution reaction (similar to 280.7 mV) at 10 mA cm(-2) and better durability and higher turnover frequencies under alkaline environments. When it was used as the cathode and anode in alkaline media, the CoPS required only 1.62 V to achieve a current density of 10 mA cm(-2), outperforming most of the low-cost bifunctional electrocatalysts reported to date. The bond energy of the P=S bond not only effectively adsorb protons but also suitably weakens the adsorption on the Co-Co bridge site, thereby improving the multifunctional electrocatalysis for water splitting. The excellent performance of porous and ultrathin CoPS nanosheets is conducive to the complete exposure of active sites and facile ion transport kinetics, and they serve as a promising non-precious-metal-based electrocatalysts for the water-splitting reaction.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000711236300058
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150090]
专题	理学院
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China 2.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China;
推荐引用方式 GB/T 7714	Zhao, Wenhua,Wu, Niandu,Yu, Fan,et al. Ultrathin, Porous CoPS Nanosheets: GO Self-Sacrificing Template Synthesis as Bifunctional Catalysts for Overall Water Splitting[J]. ACS APPLIED ENERGY MATERIALS,2021,4(10):10976-10985.
APA	Zhao, Wenhua.,Wu, Niandu.,Yu, Fan.,Zhou, Boye.,Chu, Xueyuan.,...&Yang, Shaoguang.(2021).Ultrathin, Porous CoPS Nanosheets: GO Self-Sacrificing Template Synthesis as Bifunctional Catalysts for Overall Water Splitting.ACS APPLIED ENERGY MATERIALS,4(10),10976-10985.
MLA	Zhao, Wenhua,et al."Ultrathin, Porous CoPS Nanosheets: GO Self-Sacrificing Template Synthesis as Bifunctional Catalysts for Overall Water Splitting".ACS APPLIED ENERGY MATERIALS 4.10(2021):10976-10985.