@article{3eeffa98a40f4e39942fc816068e88cd,
title = "Carbonate formation lowers the electrocatalytic activity of perovskite oxides for water electrolysis",
abstract = "The study of oxide electrocatalysts is often complicated by the formation of complex and unknown surface species as well as the interaction between the catalysts and common support materials. Because unknown surface species may result from air exposure, we developed a clean transfer system for the air-free electrochemical investigation of epitaxial thin films fabricated under typical surface science conditions. LaNiO3electrocatalysts exposed to ambient air exhibit a lower activity towards the oxygen evolution reaction than samples probed without air exposure. We demonstrate that this decrease in activity is connected to an alteration of the chemical environment of the electrocatalytically active sites through carbonate formation on exposure to CO2. Our study therefore shows that (1) the effects of air exposure must be considered for transition metal oxide catalysts and (2) that for the perovskite oxide LaNiO3the clean surface is more active than the air-exposed surface.",
keywords = "UT-Hybrid-D",
author = "Christoph Baeumer and Liang, {Allen Yu Lun} and Ur{\v s}ka Trstenjak and Qiyang Lu and Rainer Waser and Mefford, {J. Tyler} and Felix Gunkel and Slavom{\'i}r Nem{\v s}{\'a}k and Chueh, {William C.}",
note = "Funding Information: This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 796142. C. B., A. Y. L. L., Q. L., J. T. M. and W. C. C. gratefully acknowledge nancial support through the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under contract no. DE-AC02-76SF00515. Part of this work was performed at the Stanford Nano Shared Facilities (SNSF)/Stanford Nanofabrication Facility (SNF), supported by the National Science Foundation under award ECCS-1542152. This research used beamline 9.3.2 of the Advanced Light Source, a U.S. DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",
year = "2021",
month = sep,
day = "21",
doi = "10.1039/d1ta03205d",
language = "English",
volume = "9",
pages = "19940--19948",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "35",
}