Enhancing Electrocatalytic Activity of Perovskite Oxides by Tuning Cation Deficiency for Oxygen Reduction and Evolution Reactions

By Yinlong Zhu, Wei Zhou, Jie Yu, Yubo Chen, Meilin Liu, Zongping Shao. Chemistry of Materials, 2016

745 citations recorded by the source corpus.

Development of cost-effective and efficient electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of prime importance to emerging renewable energy technologies. Here, we report a simple and effective strategy for enhancing ORR and OER electrocatalytic activity in alkaline solution by introducing A-site cation deficiency in LaFeO3 perovskite; the enhancement effect is more pronounced for the OER than the ORR. Among the A-site cation deficient perovskites studied, La0.95FeO3-δ (L0.95F) demonstrates the highest ORR and OER activity and, hence, the best bifunctionality. The dramatic enhancement is attributed to the creation of surface oxygen vacancies and a small amount of Fe4+ species. This work highlights the importance of tuning cation deficiency in perovskites as an effective strategy for enhancing ORR and OER activity for applications in various oxygen-based energy storage and conversion processes.

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/7b90be0bcde35a060aa60efde286fe835c106ed1

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In Electrical and Electronic Engineering

1. Haotian Wang
2. Kun Jiang
3. Y. Jia
4. X. Yao

In Renewable Energy, Sustainability and the Environment

1. Haotian Wang
2. Kun Jiang
3. X. Yao
4. Y. Jia

Citations in the corpus

• The Role of Defect Sites in Nanomaterials for Electrocatalytic Energy Conversion (2019, methodology): “Reprinted with permission from Zhu et al.(60) Copyright 2016 American Chemical Society.”