Approaches to achieve surface sensitivity in the in situ XAS of electrocatalysts

Huang, Haoliang and Russell, Andrea E. (2021) Approaches to achieve surface sensitivity in the in situ XAS of electrocatalysts. Current Opinion in Electrochemistry, 27, 1-10, [100681]. (doi:10.1016/j.coelec.2020.100681).

Record type: Review

Abstract

In situ and operando techniques providing information regarding adsorbate bonding and atomic arrangements on the electrode surface along with pure electrochemical measurements are needed to more fully understand the detailed mechanism of electrocatalytic reactions on high surface areas/nanoparticle electrocatalysts. X-ray adsorption spectroscopy (XAS) is a powerful tool to interrogate the electronic structure and local coordination environment of such electrocatalysts under working conditions, but it should be acknowledged that standard XAS methods are not intrinsically surface sensitive. This review will present recent in situ XAS studies on single-atom, metal, and metal oxide electrocatalysts, highlighting the approaches taken to achieve surface sensitivity by careful designing of the sample under investigation.

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XAS_electrocat_curropin_revised_20201204 - Accepted Manuscript

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Accepted/In Press date: 2 January 2021

e-pub ahead of print date: 2 January 2021

Published date: 1 June 2021

Additional Information: Funding Information: HH acknowledges Fellowship support from the China Scholarship Council (201608440295) and the University of Southampton. Publisher Copyright: © 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

Keywords: Electrocatalytic reactions, In situ XAS, Nanoparticles, Single-atom electrocatalyst, Surface sensitivity, Thin films

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