Issue 74, 2025

Grain-resolved mapping of oxygen evolution activation on a Ni-superalloy

Abstract

We report the first grain-resolved mapping of oxygen evolution reaction (OER) activation on a Ni-based superalloy using identical-location EBSD, complemented by IL-SEM, IL-EDS, and SECCM. NiFe (oxy)hydroxide film formation and OER activity are strongly influenced by grain size and orientation, with (111)-oriented and smaller grains undergoing pronounced structural, chemical, and electrochemical transformations. These findings reveal pronounced microstructure heterogeneity in OER and establish IL-EBSD as a powerful tool for the microstructure-guided design of advanced electrocatalysts.

Graphical abstract: Grain-resolved mapping of oxygen evolution activation on a Ni-superalloy

Supplementary files

Transparent peer review

To support increased transparency, we offer authors the option to publish the peer review history alongside their article.

View this article’s peer review history

Article information

Article type
Communication
Submitted
13 May 2025
Accepted
05 Aug 2025
First published
14 Aug 2025
This article is Open Access
Creative Commons BY license

Chem. Commun., 2025,61, 14097-14100

Grain-resolved mapping of oxygen evolution activation on a Ni-superalloy

Č. Donik, L. Suhadolnik, B. Tomc, A. Voronkin, J. Ustarroz, M. Bele, M. Godec and N. Hodnik, Chem. Commun., 2025, 61, 14097 DOI: 10.1039/D5CC02703A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements