Journal Article

PUBDB-2025-02322

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Carbon‐Supported Single Fe/Co/Ni Atom Catalysts for Water Oxidation: Unveiling the Dynamic Active Sites

Wan, W.Extern* ; Kang, L.Extern* ; Schnegg, A. ; Ruediger, O.Extern* ; Chen, Z.Extern* ; Allen, C. S. ; Liu, L. ; Chabbra, S. ; DeBeer, S. (Corresponding author)Extern* ; Heumann, S. (Corresponding author)Extern*

2025
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/anie.202424629  doi:10.3204/PUBDB-2025-02322

Abstract: Extensive research has been conducted on carbon-supported single-atom catalysts (SACs) for electrochemical applications, owing to their outstanding conductivity and high metal atom utilization. The atomic dispersion of active sites provides an ideal platform to investigate the structure–performance correlations. Despite this, the development of straightforward and scalable synthesis methods, along with the tracking of the dynamic active sites under catalytic conditions, remains a significant challenge. Herein, we introduce a biomass-inspired coordination confinement strategy to construct a series of carbon-supported SACs, incorporating various metal elements, such as Fe, Co, and Ni. We have systematically characterized their electronic and geometric structure using various spectroscopic and microscopic techniques. Through in situ X-ray absorption spectroscopy (XAS), atomic scanning transmission electron microscopy (STEM), and electron paramagnetic resonance (EPR) analyses, it is demonstrated that the single atoms undergo structural rearrangement to form amorphous (oxy)hydroxide clusters during oxygen evolution reaction (OER), where the newly formed oxygen-bridged dual metal M─O─M or M─O─M’ (M/M’ = Fe, Co, Ni) moieties within these clusters play key role in the OER performance. This work provides essential insights into tracking the actual active sites of SACs during electrochemical OER.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20220137 (I-20220137) (I-20220137)
3. FS-Proposal: I-20220502 EC (I-20220502-EC) (I-20220502-EC)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; Index Chemicus ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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