ArticleSmall (Weinheim an der Bergstrasse, Germany)2025
Operando Exploration of CoAl-LDH: Transformations Driving Alkaline Oxygen Evolution Reaction.
Article in Small (Weinheim an der Bergstrasse, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- The LIQUID endstation for in situ spectro-electrochemical studies on energy materials @ BACH beamline.Journal of synchrotron radiation · 2026Article
- Revealing Nafion-Induced Copper Modifications by Combining In Situ and Ex Situ X-Ray Absorption Spectroscopy.Small (Weinheim an der Bergstrasse, Germany) · 2026Article
- Spectroscopic Fingerprinting of Coordination-driven Spin States in Metal-organic Architectures.Chemistry (Weinheim an der Bergstrasse, Germany) · 2026Article
- Design of CoMoCe-Oxide Nanostructured Composites as Robust Bifunctional Electrocatalyst for Water Electrolysis Overall Efficiency.Materials (Basel, Switzerland) · 2025Article
- Operando Exploration of CoAl-LDH: Transformations Driving Alkaline Oxygen Evolution Reaction.Small (Weinheim an der Bergstrasse, Germany) · 2025Article
Corrections and comments
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Authors and funding
12 authors.
Funding
Abstract
This work reports a comprehensive study on the morphology, composition, and electronic structure of CoAl layered double hydroxide (CoAl-LDH) during the oxygen evolution reaction (OER). To capture electrochemically induced transformations, operando spectroscopic and microscopic methods are combined. The complementary data provided by operando near-edge X-ray absorption fine structure (NEXAFS), supported by density functional theory (DFT) calculations, and electrochemical atomic force microscopy (AFM), reveal that under OER conditions, CoAl-LDH is fragmented into smaller particles due to Al leaching. This process forms a "resting" phase with an average Co oxidation state of 2.5+, which readily transforms into the OER-active β-CoOOH phase upon further potential increase. This work exemplifies how operando methods enable precise tracking of oxidation state changes, element dissolution, and structural transformations at the nanoscale while the electrocatalyst is active. This approach contrasts with conventional pre- and post-mortem characterization, which would instead suggest Co
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