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SUMMARY:A molecular-level description of the oxygen evolution reaction usi
 ng in situ spectroscopy - Rosa Arrigo\, Uni of Salford
DTSTART:20240502T103000Z
DTEND:20240502T113000Z
UID:TALK215986@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Water electrolysis stands as a cornerstone technology for gree
 n hydrogen production from renewable energy and consists of two half-cell 
 reactions: the hydrogen evolution reaction (HER) and the oxygen evolution 
 reaction (OER). The sluggish kinetics of the state-of-the-art OER electroc
 atalysts based on iridium oxide severely limit the overall efficiency of t
 he process and\, consequently\, its economic viability. An in-depth compre
 hension of the atomic-level mechanisms governing this reaction is consider
 ed essential for designing enhanced materials and advancing the transition
  to a sustainable and resilient energy sector. In situ structural characte
 rization techniques\, such as X-ray absorption spectroscopy and X-ray phot
 oelectron spectroscopy\, serve this purpose well as they enable real-time 
 monitoring of the chemical composition\, structural phase\, and electronic
  configuration of the species at the gas/liquid/solid interface during the
  interfacial electrocatalytic turnover. In this talk\, I will present an o
 verview of the experimental approaches developed in our group and by other
 s to probe the reactive interface during OER\, as well as our current unde
 rstanding of the reaction mechanism on Ir-O-based systems gained using bot
 h soft and hard X-ray spectroscopic techniques.\n\nReferences\n\n1) R Arri
 go\, M Hävecker\, ME Schuster\, C Ranjan\, E Stotz\, A Knop-Gericke et al
 .\,\n\nIn situ study of the gas-phase electrolysis of water on platinum by
  NAP-XPS\,\n\nAngewandte Chemie International Edition 52 (2013)\, 11660-11
 664\n\n2) JJ Velasco‐Velez\, V Pfeifer\, M Hävecker\, RS Weatherup\, R 
 Arrigo et al.\, Photoelectron spectroscopy at the graphene–liquid interf
 ace reveals the electronic structure of an electrodeposited cobalt/graphen
 e electrocatalyst\, Angewandte Chemie International Edition 54 (2015)\, 14
 554-14558\n\n3) A Knop-Gericke\, V Pfeifer\, JJ Velasco-Velez\, T Jones\, 
 R Arrigo et al.\, In situ X-ray photoelectron spectroscopy of electrochemi
 cally active solid-gas and solid-liquid interfaces\, Journal of Electron S
 pectroscopy and Related Phenomena 221 (2017)\, 10-17\n\n4) V Pfeifer\, TE 
 Jones\, JJV Vélez\, R Arrigo\, S Piccinin\, M Hävecker et al.\, In situ 
 observation of reactive oxygen species forming on oxygen-evolving iridium 
 surfaces\, Chemical science 8 (2017)\, 2143-2149 5) V Pfeifer\, TE Jones\,
  S Wrabetz\, C Massué\, JJV Vélez\, R Arrigo et al.\, Reactive oxygen sp
 ecies in iridium-based OER catalysts\, Chemical science 7 (2017)\, 6791-67
 95\n\n6) JJ Velasco-Vélez\, EA Carbonio\, CH Chuang\, CJ Hsu\, JF Lee\, R
  Arrigo\, et al.\, Surface electron-hole rich species active in the electr
 ocatalytic water oxidation\, Journal of the American Chemical Society 143 
 (2021)\, 12524-12534\n\n7) JJV Vélez\, D Bernsmeier\, TE Jones\, P Zeller
 \, E Carbonio\, CH Chuang\, et al.\, The rise of electrochemical NAPXPS op
 erated in the soft X-ray regime exemplified by the oxygen evolution reacti
 on on IrO x electrocatalysts\, Faraday discussions 236 (2022)\, 103-125 8)
  J Ruiz Esquius\, DJ Morgan\, G Algara Siller\, D Gianolio\, M Aramini et 
 al.\, Lithium-directed transformation of amorphous iridium (oxy) hydroxide
 s to produce active water oxidation catalysts\, Journal of the American Ch
 emical Society 145 (2023)\, 6398-6409 9) M Falsaperna\, R Arrigo\, F Marke
 n\, SJ Freakley Alkali Containing Layered Metal Oxides as Catalysts for th
 e Oxygen Evolution Reaction\, ChemElectroChem 2024\, e202300761
LOCATION:Open Plan Area\, Institute for Energy and Environmental Flows\, M
 adingley Rise CB3 0EZ
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