In Operando Self-Healing of Perovskite Electrocatalysts: A Case Study of SrCoO3 for the Oxygen Evolution Reaction

Hassan A. Tahini; Xin Tan; Udo Schwingenschlögl; Sean C. Smith

doi:10.1002/ppsc.201600280

In Operando Self-Healing of Perovskite Electrocatalysts: A Case Study of SrCoO₃ for the Oxygen Evolution Reaction

Hassan A. Tahini, Xin Tan, Udo Schwingenschlögl, Sean C. Smith^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Researchers conduct a case study of SrCoO₃ for the oxygen evolution reaction (OER) using in operando self-healing of perovskite electrocatalysts. The researchers establish a connection between the high surface oxygen vacancy concentration and these peaks by proposing a self-healing mechanism. They show that water molecules adsorbing on the surface can dissociate to O that can fill the vacancy sites at sub-OER onset voltages. Oxygen atoms can then migrate to fill vacancies deeper into the material, providing an electrochemical annealing mechanism for self-healing of the perovskite structure in the vicinity of the surface at voltages less than the onset of full OER to liberate O₂ molecules.

Original language	English
Article number	1600280
Journal	Particle and Particle Systems Characterization
Volume	34
Issue number	4
DOIs	https://doi.org/10.1002/ppsc.201600280
Publication status	Published - Apr 2017
Externally published	Yes

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abstract = "Researchers conduct a case study of SrCoO3 for the oxygen evolution reaction (OER) using in operando self-healing of perovskite electrocatalysts. The researchers establish a connection between the high surface oxygen vacancy concentration and these peaks by proposing a self-healing mechanism. They show that water molecules adsorbing on the surface can dissociate to O that can fill the vacancy sites at sub-OER onset voltages. Oxygen atoms can then migrate to fill vacancies deeper into the material, providing an electrochemical annealing mechanism for self-healing of the perovskite structure in the vicinity of the surface at voltages less than the onset of full OER to liberate O2 molecules.",

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AU - Schwingenschlögl, Udo

AU - Smith, Sean C.

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AB - Researchers conduct a case study of SrCoO3 for the oxygen evolution reaction (OER) using in operando self-healing of perovskite electrocatalysts. The researchers establish a connection between the high surface oxygen vacancy concentration and these peaks by proposing a self-healing mechanism. They show that water molecules adsorbing on the surface can dissociate to O that can fill the vacancy sites at sub-OER onset voltages. Oxygen atoms can then migrate to fill vacancies deeper into the material, providing an electrochemical annealing mechanism for self-healing of the perovskite structure in the vicinity of the surface at voltages less than the onset of full OER to liberate O2 molecules.

KW - density functional theory

KW - electrocatalysts

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In Operando Self-Healing of Perovskite Electrocatalysts: A Case Study of SrCoO₃ for the Oxygen Evolution Reaction

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