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- W3143272023 endingPage "14988" @default.
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- W3143272023 abstract "Water oxidation is a crucial reaction for renewable energy conversion and storage. Among the alkaline oxygen evolution reaction (OER) catalysts, NiFe based oxyhydroxides show the highest catalytic activity. However, the details of their OER mechanism are still unclear, due to the elusive nature of the OER intermediates. Here, using a novel differential electrochemical mass spectrometry (DEMS) cell interface, we performed isotope-labelling experiments in 18O-labelled aqueous alkaline electrolyte on Ni(OH)2 and NiFe layered double hydroxide nanocatalysts. Our experiments confirm the occurrence of Mars-van-Krevelen lattice oxygen evolution reaction mechanism in both catalysts to various degrees, which involves the coupling of oxygen atoms from the catalyst and the electrolyte. The quantitative charge analysis suggests that the participating lattice oxygen atoms belong exclusively to the catalyst surface, confirming DFT computational hypotheses. Also, DEMS data suggest a fundamental correlation between the magnitude of the lattice oxygen mechanism and the faradaic efficiency of oxygen controlled by pseudocapacitive oxidative metal redox charges." @default.
- W3143272023 created "2021-04-13" @default.
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- W3143272023 date "2021-05-26" @default.
- W3143272023 modified "2023-10-16" @default.
- W3143272023 title "Evidence of Mars‐Van‐Krevelen Mechanism in the Electrochemical Oxygen Evolution on Ni‐Based Catalysts" @default.
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- W3143272023 doi "https://doi.org/10.1002/anie.202101698" @default.
- W3143272023 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8251801" @default.
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