Volume 14, Issue 42 1802204
Full Paper

Oxygen-Doped Nickel Iron Phosphide Nanocube Arrays Grown on Ni Foam for Oxygen Evolution Electrocatalysis

Wenguang Xi

Wenguang Xi

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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Gang Yan

Corresponding Author

Gang Yan

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

College of Material Science and Engineering, Jilin Jianzhu University, Changchun, 130118 China

E-mail: [email protected], [email protected], [email protected]Search for more papers by this author
Zhongling Lang

Zhongling Lang

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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Yuanyuan Ma

Yuanyuan Ma

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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Huaqiao Tan

Corresponding Author

Huaqiao Tan

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

E-mail: [email protected], [email protected], [email protected]Search for more papers by this author
Haotian Zhu

Haotian Zhu

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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Yonghui Wang

Yonghui Wang

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

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Yangguang Li

Corresponding Author

Yangguang Li

Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 China

E-mail: [email protected], [email protected], [email protected]Search for more papers by this author
First published: 21 September 2018
Citations: 183

Abstract

A rationally designed oxygen evolution reaction (OER) catalyst with advanced structural and compositional superiority is highly desirable to optimize electrocatalytic performance. Prussian blue analogues (PBAs) with adjustable element compositions and accessible porous structures represent a promising precursor for the preparation of OER catalysts. Herein, oxygen-doped nickel iron phosphide nanocube arrays (Ni2P/(NiFe)2P(O) NAs) grown on Ni foam is rationally designed and fabricated from PBAs. The porous structure and the synergistic effect of Ni and Fe enable superior electrocatalytic performance and stability toward the OER in alkaline electrolytes. Density functional theory calculations reveal that Fe-incorporated Ni2P can generate new active sites on the Fe atoms, and the energy barriers of the intermediates and products are decreased efficiently in the presence of surface doped oxygen, both processes are crucial factors for enhanced catalytic performances. In 1 m KOH, the Ni2P/(NiFe)2P(O) NAs afford current densities of 10 and 800 mA cm−2 at overpotentials of 150 and 530 mV, respectively, which outperform the commercial noble metal IrO2. Ni2P/(NiFe)2P(O) NAs also have long-term stability over 100 h at a high current density. The present approach may provide a new avenue for the controlled assembly of nanoarrays for energy storage and conversion applications.

Conflict of Interest

The authors declare no conflict of interest.

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