In-situ construction of 3D hetero-structured sulfur-doped nanoflower-like FeNi LDH decorated with NiCo Prussian blue analogue cubes as efficient electrocatalysts for boosting oxygen evolution reaction

Lu Zhang; Yu-Ting Ma; Jiao-Jiao Duan; You-Qiang Yao; Jiu-Ju Feng; Ai-Jun Wang

doi:10.1016/j.jcis.2021.12.066

In-situ construction of 3D hetero-structured sulfur-doped nanoflower-like FeNi LDH decorated with NiCo Prussian blue analogue cubes as efficient electrocatalysts for boosting oxygen evolution reaction

J Colloid Interface Sci. 2022 Apr:611:205-214. doi: 10.1016/j.jcis.2021.12.066. Epub 2021 Dec 16.

Authors

Lu Zhang¹, Yu-Ting Ma¹, Jiao-Jiao Duan¹, You-Qiang Yao², Jiu-Ju Feng¹, Ai-Jun Wang³

Affiliations

¹ College of Chemistry and Life Sciences, College of Engineering, College of Geography and Environmental Sciences, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
² College of Chemistry and Life Sciences, College of Engineering, College of Geography and Environmental Sciences, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China. Electronic address: yaoyouqiang@zjnu.edu.cn.
³ College of Chemistry and Life Sciences, College of Engineering, College of Geography and Environmental Sciences, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China. Electronic address: ajwang@zjnu.cn.

PMID: 34952273
DOI: 10.1016/j.jcis.2021.12.066

Abstract

At present, it is urgent for us to develop non-noble metal-based catalysts with abundant reserves and high efficiency towards oxygen evolution reaction (OER) in water electrolysis devices. Herein, cubic NiCo-Prussian blue analogue (PBA)/ flower-like FeNi layered double hydroxide (LDH) heterostructure was facilely in-situ formed on porous nickel foam (NF) via hydrothermal strategy coupled by subsequent sulfurizing treatment (named as S-FeNi LDH@PBA/NF), showing largely facilitated electron transfer over homogeneous counterpart. Also, we investigated the effects of different Fe/Ni feeding ratios on their catalytic properties in some detail. The as-prepared S-FeNi LDH@PBA/NF demonstrated the superior OER activity (e.g. only 243 mV of overpotential required for 50 mA cm^-2) and stability. Accordingly, using the catalyst as anode, the home-assembled S-FeNi LDH@PBA/NF//Pt/C/NF electrolyzer exhibited small Tafel slope (83.1 mV dec^-1) and ultra-stability, showing the potential feasibility in practical water electrolysis. This strategy provides a hopeful model to enhance the OER performance by effectively constructing advanced catalyst with promising heterostructure and optimal electronic structure.

Keywords: Heterostructure; In-situ construction; Layered double hydroxide; Oxygen evolution reaction; Prussian blue analogue.