dc.creator | Pasquini, Chiara | |
dc.creator | Liu, Si | |
dc.creator | Chernev, Petko | |
dc.creator | González Flores, Diego | |
dc.creator | Mohammadi, Mohammad Reza | |
dc.creator | Kubella, Paul | |
dc.creator | Jiang, Shan | |
dc.creator | Loos, Stefan | |
dc.creator | Klingan, Katharina | |
dc.creator | Sikolenko, Vadim V. | |
dc.creator | Mebs, Stefan | |
dc.creator | Haumann, Michael | |
dc.creator | Beyer, Paul | |
dc.creator | D’Amario, Luca | |
dc.creator | Smith, Rodney D.L. | |
dc.creator | Zaharieva, Ivelina | |
dc.creator | Dau, Holger | |
dc.date.accessioned | 2022-07-22T20:08:33Z | |
dc.date.accessioned | 2022-10-20T00:06:59Z | |
dc.date.available | 2022-07-22T20:08:33Z | |
dc.date.available | 2022-10-20T00:06:59Z | |
dc.date.created | 2022-07-22T20:08:33Z | |
dc.date.issued | 2021 | |
dc.identifier | https://link.springer.com/article/10.1007/s00216-021-03515-0 | |
dc.identifier | 1618-2650 | |
dc.identifier | https://hdl.handle.net/10669/87034 | |
dc.identifier | https://doi.org/10.1007/s00216-021-03515-0 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4529160 | |
dc.description.abstract | Transition metal oxides are promising electrocatalysts for water oxidation, i.e., the oxygen evolution reaction (OER), which is
critical in electrochemical production of non-fossil fuels. The involvement of oxidation state changes of the metal in OER
electrocatalysis is increasingly recognized in the literature. Tracing these oxidation states under operation conditions could
provide relevant information for performance optimization and development of durable catalysts, but further methodical developments
are needed. Here, we propose a strategy to use single-energy X-ray absorption spectroscopy for monitoring metal
oxidation-state changes during OER operation with millisecond time resolution. The procedure to obtain time-resolved oxidation
state values, using two calibration curves, is explained in detail. We demonstrate the significance of this approach as well as
possible sources of data misinterpretation. We conclude that the combination of X-ray absorption spectroscopy with electrochemical
techniques allows us to investigate the kinetics of redox transitions and to distinguish the catalytic current from the
redox current. Tracking of the oxidation state changes of Co ions in electrodeposited oxide films during cyclic voltammetry in
neutral pH electrolyte serves as a proof of principle. | |
dc.language | eng | |
dc.source | Analytical and Bioanalytical Chemistry, 413, p. 5395–5408 | |
dc.subject | Electrocatalysts | |
dc.subject | Time-resolvedX-ray absorption spectroscopy | |
dc.subject | Transition metal oxides | |
dc.subject | Water oxidation | |
dc.title | Operando tracking of oxidation-state changes by coupling electrochemistry with time-resolved X-ray absorption spectroscopy demonstrated for water oxidation by a cobalt-based catalysts film | |
dc.type | artículo científico | |