Efficient photocatalytic biomass-alcohol conversion with simultaneous hydrogen evolution over ultrathin 2D NiS/Ni-CdS photocatalyst

Zongyi Huang ¹Cheng Guo ²Quanxing Zheng ³Hongliang Lu ³Pengfei Ma ³Zhengzhong Fang ³Pengfei Sun ¹Xiaodong Yi ¹Zhou Chen²

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作者信息

1. State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China
2. College of Materials,Key Laboratory of High Performance Ceramic Fibers(Xiamen University),Ministry of Education,Xiamen University,Xiamen 361005,China
3. Technology Center,China Tobacco Fujian Industrial Co.,Ltd.,Xiamen 361021 China
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Abstract

The photocatalytic conversion of biomass into high-value chemicals,coupled with simultaneous hydro-gen(H2)evolution,leveraging the electrons and holes generated by solar energy,holds great promise for addressing energy demands.In this study,we constructed a dual functional photocatalytic system formed by NiS loaded on Ni doped two-dimensional(2D)CdS nanosheet(NiS/Ni-CdSNS)heterostructure for visible-light-driven H2 evolution and ethanol oxidation to acetaldehyde.Remarkably,the 2D NiS/Ni-CdSNS exhibited significant activity and selectivity in both photocatalytic H2 evolution and ethanol oxi-dation,achieving yields of 7.98mmol g-1 h-1 for H2 and 7.33mmol g-1 h-1 for acetaldehyde.The hetero-geneous interface of the composite facilitated efficient charge separation,while NiS provided abundant sites for proton reduction,thereby promoting the overall dual-functional photocatalytic activity.Density functional theory calculations further reveal that both Ni doping and NiS loading can reduce the reac-tion energy barrier of ethanol oxidation of free radicals,and NiS/Ni-CdSNS composite materials exhibit stronger ethanol C-H activation ability to generate key intermediate·CH(OH)CH3 on the surface.This work serves as a valuable guide for the rational design of efficient dual functional photocatalytic systems that combine H2 evolution with the selective conversion of organic compounds into high-value chemicals.

Key words

Photocatalysis/Biomass-alcohol oxidation/H2 evolution/Dual-functional catalysis

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基金项目

National Key R&D Program of China(2022YFB1903200)

National Natural science Foundation of China(U23A2087)

National Natural science Foundation of China(22372137)

National Natural science Foundation of China(22102136)

National Natural science Foundation of China(22072057)

National Natural science Foundation of China(22227802)

National Natural science Foundation of China(22172126)

Key Research and Development Program of Guangxi(GUIKE AB23026116)

Fundamental Research Funds for the Central Universities(20720220105)

Fundamental Research Funds for the Central Universities(20720232005)

XMU Training Program of Innovation and Enterpreneurship for Undergraduates(2022Y1132)

XMU Training Program of Innovation and Enterpreneurship for Undergraduates(202310384027)

出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

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