Ni-modified FeOOH integrated electrode by self-source corrosion of nickel foam for high-efficiency electrochemical water oxidation

Li Li; Zhaolong Wang; Xiaojie She; Li Pan; Chunyan Xi; Dan Wang; Jianjian Yi; Juan Yang

doi:10.1016/j.jcis.2023.08.112

Ni-modified FeOOH integrated electrode by self-source corrosion of nickel foam for high-efficiency electrochemical water oxidation

J Colloid Interface Sci. 2023 Dec 15;652(Pt A):789-797. doi: 10.1016/j.jcis.2023.08.112. Epub 2023 Aug 19.

Authors

Li Li¹, Zhaolong Wang², Xiaojie She³, Li Pan¹, Chunyan Xi¹, Dan Wang¹, Jianjian Yi⁴, Juan Yang⁵

Affiliations

¹ Analysis and Testing Center, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
² School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
³ School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China. Electronic address: xiaojie.she@polyu.edu.hk.
⁴ College of Environmental Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China.
⁵ School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China. Electronic address: yangjuan6347@ujs.edu.cn.

PMID: 37619258
DOI: 10.1016/j.jcis.2023.08.112

Abstract

The construction and application of efficient iron oxyhydroxide (FeOOH) is still a challenge in the field of energy conversion. Here, a facile preparation method is developed by directly utilizing commercialized nickel foams (NF) as the nickel source and the supporting framework, as well as the ingenious use of etching effect originating from acidic medium in the process of iron salt hydrolysis. As a result, a Ni-modulated FeOOH integrated electrode (Ni-FeOOH/NF) is obtained. Unexpectedly, the implementation of our scheme effectively activates the catalytic intrinsic activity of FeOOH, successfully transforming the inert NF into an integrated electrode with high oxygen evolution reaction (OER) performance. Specifically, the Ni-FeOOH/NF exhibits the overpotential of 277 mV (@100 mA cm^-2) and superior stability for OER. Additionally, the as-prepared Ni-FeOOH/NF electrode could also operate steadily for OER in alkaline adjusted saline water. Our research provides a new idea for the preparation of satisfactory Fe-based metal materials as OER electrocatalysts.

Keywords: FeOOH; Integrated electrode; Oxygen evolution reaction (OER); The alkaline adjusted saline water.