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Updated: Feb 5, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

コバルト媒介の構造遷移：効率的な水電解のためのパイロクロア材料の迅速な合成と性能向上を促進

Yanzong Huang^1,2, Tongtong Liu^1,2, Qingren Zhang^1,2

¹State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology Beijing 100029 P. R. China zhangzhengping@mail.buct.edu.cn wangf@mail.buct.edu.cn.

Chemical science

|February 4, 2026

Abstract:

Vacancies, which inevitably exist in all solids, influence numerous atomic behaviors and material properties and play a crucial role in both synthesis processes and application performance. In this study, we present a successful approach utilizing the flexible transition between [CoO₄] and [CoO₆] polyhedra to modulate the oxygen vacancies for further controlling the formation of ruthenate pyrochlores and enhancing the electrocatalytic performance for the oxygen evolution reaction. During the formation of the pyrochlore phase, the incorporation of [CoO₄] tetrahedra introduces an inherent oxygen deficiency, accompanied by the beneficial transformation of [CoO₄] tetrahedra into [CoO₆] octahedra. It kinetically accelerates the diffusive reaction rate constant by 164 times. On the other hand, during the oxygen evolution process by the lattice oxygen mediated mechanism, the flexible transformation between [CoO₆] octahedra and [CoO₄] tetrahedra in pyrochlores can effectively mitigate lattice distortions and suppress the metal-insulator transition induced by atomic rearrangements, thereby significantly enhancing the service life of this multicomponent electrocatalyst in proton and anion exchange membrane water electrolysis applications.

キーワード:

パイロクロア水電解酸素発生反応電極触媒コバルト酸素空孔ルテネート

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