Nickel–iron hydroxide oxygen evolution electrocatalysts prepared by a simple chemical bath deposition method. (17th June 2021)

• Record Type: Journal Article
• Authors: Kim, Ji Eun; Bae, Ki-kwang; Park, Chu-sik; Jeong, Seong-uk; Kim, Jong-won; Yoon, Jaekyung; Cho, Hyekyung; Lee, Ki Bong; Kang, Kyoung Soo
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 39(2021)
• Page Start: 20313
• Page End: 20324
• Publication Date: 2021-06-17
• Subjects: Water electrolysis -- Oxygen evolution reaction -- Ni–Fe hydroxide -- Chemical bath deposition -- Layered double hydroxide; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.03.172
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The oxygen evolution reaction (OER), which is an important process in water electrolysis, requires a high overpotential. There is a need for cheaper and more efficient catalysts for this process. Ni hydroxide-based OER catalysts are promising, but further research is required. This paper describes the use of a simple chemical bath deposition method for the preparation and characterization of three-dimensional microstructured Ni–Fe hydroxide electrochemical OER catalysts on nickel plates. The influences of the Fe ion content and pH of the chemical bath on the performance of the catalysts are addressed, allowing the preparation of an efficient and highly active catalyst. Thus, this study represents a stepping stone toward further developments in the field of water electrolysis. Highlights: Ni–Fe electrocatalysts for alkaline water electrolysis prepared by simple a process. Chemical bath deposition method was used to prepare the electrocatalysts. The method was optimized with respect to the Ni/Fe ratio and pH of the bath. Resultant electrocatalysts facilitated the efficient oxygen evolution reaction.