Volume 58, Issue 8 pp. 2316-2320
Communication

Double Perovskite LaFexNi1−xO3 Nanorods Enable Efficient Oxygen Evolution Electrocatalysis

Huaping Wang

Huaping Wang

College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123 Jiangsu, China

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081 China

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Juan Wang

Juan Wang

College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123 Jiangsu, China

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Yecan Pi

Yecan Pi

College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123 Jiangsu, China

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Qi Shao

Qi Shao

College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123 Jiangsu, China

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Prof. Yueming Tan

Prof. Yueming Tan

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081 China

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Prof. Xiaoqing Huang

Corresponding Author

Prof. Xiaoqing Huang

College of Chemistry, Chemical Engineering and Materials Science Soochow University, No.199, Ren'ai Road, Suzhou, 215123 Jiangsu, China

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First published: 04 January 2019
Citations: 189

Graphical Abstract

Double perovskite nanorods LaFexNi1−xO3 (LFNO NRs) with reduced diameter have been successfully created and adopted as efficient OER catalysts. The optimized LFNO NRs have proper d-band electronic structure, enabling strong binding between adsorbates and NRs, which boosts their intrinsic OER activity.

Abstract

Perovskite-based electrocatalysts are one of the most promising materials for oxygen evolution reaction (OER), but their activity and durability are still far from desirable. Herein, we demonstrate that the double perovskite LaFexNi1−xO3 (LFNO) nanorods (NRs) can be adopted as highly active and stable OER electrocatalysts. The optimized LFNO-II NRs with Ni/Fe ratio of 8:2 achieve a low overpotential of 302 mV at 10 mA cm−2 and a small Tafel slope of 50 mV dec−1, outperforming those of the commercial Ir/C. The LFNO-II NRs also show high OER stability with slight current decrease after 20 h. The enhanced activity is explained by the improved surface area, tailored electronic structure as well as strong hybridization between O and Ni.

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