Mild Catalytic-Crystallization-Confinement Synthesis of Single-Atom Catalyst on α-MnO₂ With Hundreds-Fold Enhanced Water Oxidation Activity.

Authors

Yuchao Jiao, Ziyi Yang, Yanqi Liu, Huan Liang, Xingping Zuo, Yuehui Liu, Qianjiang Mao, Xinyi Chen, Xiangfeng Liu, Tianran Zhang

Published in

Advanced materials (Deerfield Beach, Fla.). Pages e75112. Sep 22, 2026. Epub Sep 22, 2026.

Abstract

Single-atom catalysts anchored on metal oxide supports (SACs/MO_x) present exceptional activities toward oxygen evolution reaction (OER), owing to the strong metal-support interactions, maximum atom utilization, and good stability under high oxidation environments. However, conventional synthesis of SACs/MO_x involves uncontrollable procedures and harsh conditions, hindering their atomic dispersion and scalable manufacturing. Here, we report a catalytic-crystallization-confinement approach for synthesizing SACs on α-MnO₂ under low temperature and ambient pressure. This approach leverages noble-metal atoms to mediate the dissolution-recrystallization of amorphous oxide precursors, confining the noble-metal single atoms within the lattice, and lowering the crystallization temperature of the precursor. The fabrication is scalable and generalizable, allowing the synthesis of diverse SACs (e.g. Ir, Ru, Pd, Pt) on α-MnO₂ support. The representative Ir-single-atom/α-MnO₂ exhibits a ∼300-fold OER activity enhancement over commercial IrO₂. This work opens a new avenue for the mild and scalable synthesis of SACs and provides new insight into crystallization mechanism of oxides.

PMID:
42773827
Bibliographic data and abstract were imported from PubMed on 23 Sep 2026.

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