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• W2852231439 endingPage "6738" @default.
• W2852231439 startingPage "6721" @default.
• W2852231439 abstract "Dye-sensitized photo-electrochemical cells (DS-PECs) form an emerging technology for the large-scale storage of solar energy in the form of (solar) fuels because of the low cost and ease of processing of their constitutive photoelectrode materials. Preparing such molecular photocathodes requires a well-controlled co-immobilization of molecular dyes and catalysts onto transparent semiconducting materials. Here we used a series of surface analysis techniques to describe the molecular assembly of a push-pull organic dye and a cobalt diimine-dioxime catalyst co-grafted on a p-type NiO electrode substrate. (Photo)electrochemical measurements allowed characterization of electron transfer processes within such an assembly and to demonstrate for the first time that a CoI species is formed as the entry into the light-driven H2 evolution mechanism of a dye-sensitized photocathode. This co-grafted noble-metal free H2-evolving photocathode architecture displays similar performances to its covalent dye-catalyst counterpart based on the same catalytic moiety. Post-operando time-of-flight secondary ion mass spectrometry (ToF-SIMS) analysis of these photoelectrodes after extensive photoelectrochemical operation suggested decomposition pathways of the dye and triazole linkage used to graft the catalyst onto NiO, providing grounds for the design of optimized molecular DS-PEC components with increased robustness upon turnover." @default.
• W2852231439 created "2018-07-19" @default.
• W2852231439 creator A5006344944 @default.
• W2852231439 creator A5009538487 @default.
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• W2852231439 creator A5032034952 @default.
• W2852231439 creator A5039730252 @default.
• W2852231439 creator A5047933845 @default.
• W2852231439 creator A5049762381 @default.
• W2852231439 creator A5050667760 @default.
• W2852231439 date "2018-01-01" @default.
• W2852231439 modified "2023-10-14" @default.
• W2852231439 title "Insights into the mechanism and aging of a noble-metal free H₂-evolving dye-sensitized photocathode" @default.
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