Publisher Information: KTH, Kemi State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, 27599, NC, United States;Engineering Laboratory of Advanced Energy Materials, Chinese Academy of Sciences, Ningbo Institute of Material Technology & Engineering, Zhejiang, Ningbo, 315201, China State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China;Center of Artificial Photosynthesis for Solar Fuels, Westlake University, School of Science, Hangzhou, 310024, China Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, 27599, NC, United States State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China Royal Society of Chemistry (RSC) 2022
نبذة مختصرة : A low-cost and easy-to-construct dye-sensitized photoanode for water oxidation was prepared by co-loading a new triphenylamine donor-acceptor organic chromophore (D1) and a Co4O4 cobalt cubane-based water oxidation catalyst (CoF) on TiO2 thin films. As the first example of a molecular catalyst-based, noble metal-free, dye-sensitized photoanode, the electrode, TiO2|D1,CoF, produces a higher photocurrent than other noble metal-free, dye-sensitized photoanodes with a relatively high faradaic efficiency for O2 production. The success of the dyad system lies in retarded interfacial charge recombination and extended light absorption both of which take advantage of the pyridine anchor-functionalized chromophore. In addition, the CoF catalyst, decorated with hydrophobic aliphatic chains, serves as a protective layer for stabilizing the organic dyes on electrode surfaces. Transient absorption measurement suggests the accumulation of oxidative equivalents on CoF by electron transfer on the TiO2 surface. The results and design principles presented here demonstrate the use of molecular engineering as a powerful tool for the exploration of low-cost solar water-splitting devices.
QC 20230124
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