Electrocatalysts for Photochemical Water-Splitting

Kalanur, Shankara S.; Seo, Hyungtak

doi:10.1007/978-3-030-27161-9_7

Cited by 4 publications

(1 citation statement)

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“…The course of the process is complicated by the peculiarities of the reaction kinetics. In an acidic environment, the reaction mechanism can be written as follows [ 23 , 24 ]: Cathode reaction: 4H + + 4ē 2H 2 Anode reaction: 2H 2 O O 2 + 4H + + 4ē Overall reaction: 2H 2 O 2H 2 + O 2 ∗+ H 2 O HO* + H + + ē HO∗ + OH − O* + H 2 O+ ē 2O* 2∗ + O 2 O* + H 2 O HOO* + H + + ē HOO* + H 2 O ∗ + O 2 + H + + ē …”

Section: Photoelectrochemical Reactions and Processesmentioning

confidence: 99%

Operando Photo-Electrochemical Catalysts Synchrotron Studies

et al. 2022

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The attempts to develop efficient methods of solar energy conversion into chemical fuel are ongoing amid climate changes associated with global warming. Photo-electrocatalytic (PEC) water splitting and CO2 reduction reactions show high potential to tackle this challenge. However, the development of economically feasible solutions of PEC solar energy conversion requires novel efficient and stable earth-abundant nanostructured materials. The latter are hardly available without detailed understanding of the local atomic and electronic structure dynamics and mechanisms of the processes occurring during chemical reactions on the catalyst–electrolyte interface. This review considers recent efforts to study photo-electrocatalytic reactions using in situ and operando synchrotron spectroscopies. Particular attention is paid to the operando reaction mechanisms, which were established using X-ray Absorption (XAS) and X-ray Photoelectron (XPS) Spectroscopies. Operando cells that are needed to perform such experiments on synchrotron are covered. Classical and modern theoretical approaches to extract structural information from X-ray Absorption Near-Edge Structure (XANES) spectra are discussed.

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