One-step fabrication of copper sulfide catalysts for HER in natural seawater and their bifunctional properties in freshwater splitting

doi:10.1016/j.fuel.2022.124073

GIEC OpenIR

	One-step fabrication of copper sulfide catalysts for HER in natural seawater and their bifunctional properties in freshwater splitting
	Marimuthu, T.1; Yuvakkumar, R.2; Ravi, G.2; Zheng, Yupeng 1; Bi, Zhuoneng 1; Xu, Xueqing1 ; Xu, Gang1 ; Velauthapillai, Dhayalan 3
	2022-08-15
发表期刊	FUEL
ISSN	0016-2361
卷号	322 页码:10
通讯作者	Yuvakkumar, R.(yuvakkumarr@alagappauniversity.ac.in) ; Xu, Xueqing(xuxq@ms.giec.ac.cn)
摘要	Natural seawater electrolysis is an efficient technology to produce hydrogen (H2) fuel and protects the environment from pollution. The lack of research on developing a suitable catalyst for hydrogen evolution reaction (HER) impedes generating an H2 sustainable fuel from natural seawater. In this study, copper sulfide (Cu2S) catalysts were successfully fabricated on nickel (Ni) foam with the help of a low-temperature hydrothermal technique by varying the growth temperatures in the range of 60-80 degrees C. The increase in growth temperatures improved the crystalline nature of the chalcocite Cu2S structure. The Cu2S catalyst fabricated at 80 degrees C showed a well-defined and improved the morphology with pores and small nanoparticles compared to other catalysts. An X-ray photoelectron spectroscope (XPS) showed the composition, oxidation state, and binding energy of the Cu2S catalysts. The Cu2S catalyst fabricated at 80 degrees C showed a little overpotential of 445 mV to attain 10 mA/cm2 for HER activity in natural seawater, and possessed higher intrinsic catalytic activity (136.10 mV/dec), electrochemical surface active site (634 cm2), and charge transfer properties (Rct, 4.40 ohm) with better long-term stability (86.7%) compared to other catalysts fabricated at 60 and 70 degrees C. Etching test of the Cu2S-80 degrees C catalyst in diluted hydrochloric (HCl) acid revealed no the insoluble precipitate on catalyst surface with a better 77.74% long-term stability. The bifunctional properties (HER and OER) of Cu2S catalysts for overall splitting were also investigated with three- and two-electrode cell configuration. The Cu2S catalyst fabricated at 80 degrees C exhibited a little overall cell potential of 1.65 V to reach 10 mA/cm2 compared to other Cu2S catalysts in 1 M KOH solution with impressive long-term stability of 99.23% up to 10 h. The Cu2S-80 degrees C catalyst was suitable for hydrogen production in natural seawater.
关键词	Natural seawater Chalcocite copper sulfide Charge transfer properties Bifunctional properties Catalysts
DOI	10.1016/j.fuel.2022.124073
关键词[WOS]	HYDROGEN EVOLUTION REACTION ; EFFICIENT ELECTROCATALYST ; CUS NANOSHEETS ; ARRAYS ; NANOPARTICLES ; MICROSPHERES ; NANOSPHERES ; ROBUST ; PHASE ; CU2S
收录类别	SCI
语种	英语
资助项目	UGC-SAP ; DST-FIST ; Project on Collaborative Innovation and Environmental Construction Platform of Guangdong Province ; DST-PURSE ; MHRD-RUSA
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	UGC-SAP ; DST-FIST ; Project on Collaborative Innovation and Environmental Construction Platform of Guangdong Province ; DST-PURSE ; MHRD-RUSA
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000807458500001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36847
专题	中国科学院广州能源研究所
通讯作者	Yuvakkumar, R.; Xu, Xueqing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 2.Alagappa Univ, Dept Phys, Karaikkudi 630 003, Tamil Nadu, India 3.Western Norway Univ Appl Sci, Fac Engn & Sci, N-5063 Bergen, Norway
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Marimuthu, T.,Yuvakkumar, R.,Ravi, G.,et al. One-step fabrication of copper sulfide catalysts for HER in natural seawater and their bifunctional properties in freshwater splitting[J]. FUEL,2022,322:10.
APA	Marimuthu, T..,Yuvakkumar, R..,Ravi, G..,Zheng, Yupeng.,Bi, Zhuoneng.,...&Velauthapillai, Dhayalan.(2022).One-step fabrication of copper sulfide catalysts for HER in natural seawater and their bifunctional properties in freshwater splitting.FUEL,322,10.
MLA	Marimuthu, T.,et al."One-step fabrication of copper sulfide catalysts for HER in natural seawater and their bifunctional properties in freshwater splitting".FUEL 322(2022):10.