Volume 19, Issue 48 2302970
Research Article

Electronic Structure Regulation and Surface Reconstruction of Iron Diselenide for Enhanced Oxygen Evolution Activity

Yuan Huang

Yuan Huang

State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China

Shenzhen Research Institute of Shandong University, Shenzhen, Guangdong, 518057 China

Search for more papers by this author
Li Zhang

Li Zhang

Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Science, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100049 China

Search for more papers by this author
Li-Wen Jiang

Li-Wen Jiang

State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China

Shenzhen Research Institute of Shandong University, Shenzhen, Guangdong, 518057 China

Search for more papers by this author
Xiao-Long Liu

Xiao-Long Liu

Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Science, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100049 China

Search for more papers by this author
Ting Tan

Corresponding Author

Ting Tan

University of Chinese Academy of Sciences, Beijing, 100049 China

Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Science, Beijing, 100190 China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
Hong Liu

Corresponding Author

Hong Liu

State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China

Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, Shandong, 250022 China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
Jian-Jun Wang

Corresponding Author

Jian-Jun Wang

State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China

Shenzhen Research Institute of Shandong University, Shenzhen, Guangdong, 518057 China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
First published: 18 August 2023
Citations: 5

Abstract

Regulating the electronic structure of active sites and monitoring the evolution of the active component is essential to improve the intrinsic activity of catalysts for electrochemical reactions. Herein, a highly efficient pre-electrocatalyst of iron diselenide with rich Se vacancies achieved by phosphorus doping (denoted as P-FeSe2) for oxygen evolution reaction (OER) is reported. Systematically experimental and theoretical results show that the formed Se vacancies with phosphorus doping can synergistically modulate the electronic structure of FeSe2 and facilitate OER kinetics with the resulting enhanced electrical conductivity and electrochemical surface area. Importantly, the in situ formed FeOOH species on the surface of the P-FeSe2 nanorods (denoted as P-FeOOH(Se)) during the OER process acts as an active component to efficiently catalyze OER and exhibits a low overpotential of 217 mV to reach 10 mA cm-2 with good durability. Promisingly, an alkaline electrolyzer assembled with P-FeOOH(Se) and Pt/C electrodes requires an ultra-low cell voltage of 1.50 V at 10 mA cm-2 for overall water splitting, which is superior to the RuO2 || Pt/C counterpart and most of the state-of-the-art electrolyzers, demonstrating the high potential of the fabricated electrocatalyst by P doping strategy to explore more highly efficient selenide-based catalysts for various reactions.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.