@article{7796575d9aec432ca2da980e2c7de489,
title = "Operando investigation of Au-MnOx thin films with improved activity for the oxygen evolution reaction",
abstract = "The electrochemical splitting of water holds great potential as a method for producing clean fuels by storing electricity from intermittent energy sources. The efficiency of such a process would be greatly facilitated by incorporating more active catalysts based on abundant materials for the oxygen evolution reaction. Manganese oxides are promising as catalysts for this reaction. Recent reports show that their activity can be drastically enhanced when modified with gold. Herein, we investigate highly active mixed Au-MnOx thin films for the oxygen evolution reaction, which exhibit more than five times improvement over pure MnOx. These films are characterized with operando X-ray Absorption Spectroscopy, which reveal that Mn assumes a higher oxidation state under reaction conditions when Au is present. The magnitude of the enhancement is correlated to the size of the Au domains, where larger domains are the more beneficial.",
keywords = "Electrocatalysis, Operando study, Water oxidation, X-ray Absorption Spectroscopy",
author = "Rasmus Frydendal and Seitz, {Linsey C.} and Dimosthenis Sokaras and Weng, {Tsu Chien} and Dennis Nordlund and Ib Chorkendorff and Stephens, {Ifan E.L.} and Jaramillo, {Thomas F.}",
note = "Funding Information: The authors gratefully acknowledge financial support from the Danish Ministry of Science's UNIK initiative, Catalysis for Sustainable Energy. This work was partially supported by the US Department of Energy, Basic Energy Science through the SUNCAT Center for Interface Science and Catalysis. LCS received fellowship support from the DARE Doctoral Fellowship supported by the Vice Provost for Graduate Education at Stanford University. Part of this work was performed at the Stanford Nano Shared Facilities (SNSF). Use of the Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. This work was supported by a research grant (9455) from VILLUM FONDEN. Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",
year = "2017",
month = mar,
day = "10",
doi = "10.1016/j.electacta.2017.01.085",
language = "English (US)",
volume = "230",
pages = "22--28",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",
}