首页|Solar-driven CO2 conversion to methane and methanol using different nanostructured Cu2O-based catalysts modified with Au nanoparticles

Solar-driven CO2 conversion to methane and methanol using different nanostructured Cu2O-based catalysts modified with Au nanoparticles

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This work describes the use of TiO2 nanotubes-based electrodes(TNT)modified with Cu2O nanostruc-tures and gold nanoparticles for the photoelectroreduction of CO2 to produce value-added compounds.A thin layer of polydopamine was used as both an adherent agent and an electron transfer mediator,due to its π-conjugated electron system.The highest production yield was achieved using a TNT@PDA/Nc/Au40％electrode,with Faradaic efficiencies of 47.4％(110.5 μM cm-2)and 27.8％(50.4 μM cm-2)for methanol and methane,respectively.The performance of the photoelectrodes was shown to be Cu2O facet-dependent,with cubic structures leading to greater conversion of CO2 to methanol(43％)and methane(27％),compared to the octahedral morphology,while a higher percentage of metallic gold on the nanostructured Cu2O surface was mainly important for CH4 production.Density functional theory(DFT)calculations supported these findings,attributing the superior photoelectrocatalytic performance of the TNT@PDA/Nc/Au40％electrode for CH4 generation to the formation of an OCH3 intermediate bonded to Au atoms.Studies using isotope-labeling and analysis by gas chromatograph-mass(GC-MS)demon-strated that 13CO2 was the source for photoelectrocatalytic generation of 13CH3OH and 13CH313CH2OH.

Cu2O nanocubesPhotoelectrocatalysisPolydopamineCO2 photoelectroreductionDFT calculations

Jo?o Angelo Lima Perini、Lilian D.Moura Torquato、Juliana F.de Brito、Gustavo A.Andolpho、Mateus A.Gon?alves、Leonardo D.De Angelis、Lucas D.Germano、Susana I.Córdoba de Torresi、Teodorico C.Ramalho、Maria V.Boldrin Zanoni

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São Paulo State University(UNESP),Institute of Chemistry,Rua Prof.Francisco Degni,55,Araraquara,SP 14800-060,Brazil

National Institute of Alternative Technologies for Detection,Toxicological Evaluation and Removal of Micropollutants and Radioactive Substances(INCT-DATREM),São Paulo State University(UNESP),Institute of Chemistry,Rua Prof.Francisco Degni,55,Araraquara,SP 14800-060,Brazil

Laboratory of Molecular Modelling,Department of Chemistry,Natural Sciences Institute,Federal University of Lavras,Lavras,MG 37200-900,Brazil

Instituto de Química,Universidade de São Paulo,Av.Prof.Lineu Prestes 748 05508-080,Sao Paulo,SP,Brazil

Department of Chemistry,Faculty of Science,University of Hradec Králové,Hradec Králové 500 03,Czech Republic

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FAPESP,BrazilFAPESP,BrazilFAPESP,BrazilFAPESP,BrazilCNPq,BrazilCNPq,BrazilCNPq,BrazilInstituto SerrapilheiraFAPEMIG,BrazilCNPq,BrazilPROPE-UNESP

2023/10027-52014/50945-42020/15230-52021/000675-4465571/2014-0303269/2021-9307837/2014-9Serra-2211-41925PPM-00831-15105944/2022-013/2022

2024

10.1016/j.jechem.2023.10.057

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.91(4)
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