Direct evidence of boosted oxygen evolution over perovskite by enhanced lattice oxygen participation
Open Access
- 24 April 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 11 (1), 1-10
- https://doi.org/10.1038/s41467-020-15873-x
Abstract
The development of oxygen evolution reaction (OER) electrocatalysts remains a major challenge that requires significant advances in both mechanistic understanding and material design. Recent studies show that oxygen from the perovskite oxide lattice could participate in the OER via a lattice oxygen-mediated mechanism, providing possibilities for the development of alternative electrocatalysts that could overcome the scaling relations-induced limitations found in conventional catalysts utilizing the adsorbate evolution mechanism. Here we distinguish the extent to which the participation of lattice oxygen can contribute to the OER through the rational design of a model system of silicon-incorporated strontium cobaltite perovskite electrocatalysts with similar surface transition metal properties yet different oxygen diffusion rates. The as-derived silicon-incorporated perovskite exhibits a 12.8-fold increase in oxygen diffusivity, which matches well with the 10-fold improvement of intrinsic OER activity, suggesting that the observed activity increase is dominantly a result of the enhanced lattice oxygen participation.This publication has 73 references indexed in Scilit:
- Double Perovskites in Catalysis, Electrocatalysis, and Photo(electro)catalysisTrends in Chemistry, 2019
- Challenges and prospects in the catalysis of electroreduction of nitrogen to ammoniaNature Catalysis, 2019
- Low-dimensional catalysts for hydrogen evolution and CO2 reductionNature Reviews Chemistry, 2018
- Perovskites in catalysis and electrocatalysisScience, 2017
- Earth-abundant catalysts for electrochemical and photoelectrochemical water splittingNature Reviews Chemistry, 2017
- Toward Enhanced Oxygen Evolution on Perovskite Oxides Synthesized from Different Approaches: A Case Study of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δElectrochimica Acta, 2016
- Oxygen and hydrogen evolution reactions on Ru, RuO 2 , Ir, and IrO 2 thin film electrodes in acidic and alkaline electrolytes: A comparative study on activity and stabilityCatalysis Today, 2016
- Covalency-reinforced oxygen evolution reaction catalystNature Communications, 2015
- Fabrication of Ba0.5Sr0.5Co0.8Fe0.2O3–δ Catalysts with Enhanced Electrochemical Performance by Removing an Inherent Heterogeneous Surface Film LayerAdvanced Materials, 2014
- A Perovskite Oxide Optimized for Oxygen Evolution Catalysis from Molecular Orbital PrinciplesScience, 2011