Defect Engineering of Nickel-Based Compounds for Energy-Saving H 2 Production

Yi Zeng, Xueqiang Qi (), Shun Lu (), Mohamed N. Khalil, Xiuxiu Dong and Haoqi Wang ()
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Yi Zeng: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Xueqiang Qi: School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China
Shun Lu: Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Mohamed N. Khalil: College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
Xiuxiu Dong: Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Haoqi Wang: Radiation Technology Institute, Beijing Academy of Science and Technology, Beijing 100875, China

Energies, 2024, vol. 17, issue 15, 1-24

Abstract: The urea oxidation reaction (UOR), requiring less energy to produce hydrogen, is considered as a potential alternative to the traditional oxygen evolution reaction. Consequently, developing highly efficient UOR catalysts to facilitate H 2 production has garnered widespread attention. A promising approach to enhancing the effectiveness of these electrocatalysts is defect engineering. By introducing structural defects, defect engineering can expose more active sites and optimize their electronic structure, thereby improving their activity. This work offers a comprehensive overview of recent progress in defect engineering of nickel-based electrocatalysts for the UOR. It summarizes various strategies for generating defects, including the creation of vacancies, doping, the incorporation of single atoms, amorphization, and achieving high refractivity. Furthermore, we discuss the advanced characterization techniques commonly used to identify the presence of defects in these electrocatalysts, as well as to determine their detailed structures. Finally, we outline the prospects and challenges associated with the systematic design and fabrication of novel UOR electrocatalysts with tunable defects, aiming to further enhance their efficiency and stability.

Keywords: hydrogen production; urea oxidation reaction; nickel-based compounds; defect engineering (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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