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Efficient photocatalytic biomass-alcohol conversion with simultaneous hydrogen evolution over ultrathin 2D NiS/Ni-CdS photocatalyst
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作者 Zongyi Huang Cheng Guo +6 位作者 quanxing zheng Hongliang Lu Pengfei Ma zhengzhong Fang Pengfei Sun Xiaodong Yi Zhou Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第7期422-427,共6页
The photocatalytic conversion of biomass into high-value chemicals,coupled with simultaneous hydrogen(H_(2))evolution,leveraging the electrons and holes generated by solar energy,holds great promise for addressing ene... The photocatalytic conversion of biomass into high-value chemicals,coupled with simultaneous hydrogen(H_(2))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 H_(2)evolution and ethanol oxidation to acetaldehyde.Remarkably,the 2D NiS/NiCdSNS exhibited significant activity and selectivity in both photocatalytic H_(2)evolution and ethanol oxidation,achieving yields of 7.98 mmol g^(-1)h^(-1)for H_(2)and 7.33 mmol g^(-1)h^(-1)for acetaldehyde.The heterogeneous 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 reaction 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)CH_(3)on the surface.This work serves as a valuable guide for the rational design of efficient dual functional photocatalytic systems that combine H_(2)evolution with the selective conversion of organic compounds into high-value chemicals. 展开更多
关键词 Photocatalysis Biomass-alcohol oxidation H_(2)evolution Dual-functional catalysis
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