Iron, rhodium-codoped Ni2P nanosheets arrays supported on nickel foam as an efficient bifunctional electrocatalyst for overall water splitting

Meng-Ting Chen; Jiao-Jiao Duan; Jiu-Ju Feng; Li-Ping Mei; Yang Jiao; Lu Zhang; Ai-Jun Wang

doi:10.1016/j.jcis.2021.07.101

Iron, rhodium-codoped Ni₂P nanosheets arrays supported on nickel foam as an efficient bifunctional electrocatalyst for overall water splitting

J Colloid Interface Sci. 2022 Jan:605:888-896. doi: 10.1016/j.jcis.2021.07.101. Epub 2021 Jul 21.

Authors

Meng-Ting Chen¹, Jiao-Jiao Duan¹, Jiu-Ju Feng¹, Li-Ping Mei¹, Yang Jiao¹, Lu Zhang¹, Ai-Jun Wang²

Affiliations

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

PMID: 34371432
DOI: 10.1016/j.jcis.2021.07.101

Abstract

To enhance the overall water splitting efficiency, it is widely attractive yet challenging to develop low price, abundance and efficient bifunctional electrocatalysts towards oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, Fe,Rh-codoped Ni₂P nanosheets arrays were in situ anchored on three-dimension (3D) Ni foam under hydrothermal condition and successive phosphorization, denoted as Fe,Rh-Ni₂P/NF for simplicity. The unique nanosheets arrays effectively enriched the active sites with easy accessibility. By virtue of the unique sheet-like arrays and 3D porous conductive substrate, the prepared Fe,Rh-Ni₂P/NF showed the low overpotentials of 226 mV at 30 mA cm^-2 towards the OER and 73 mV at 10 mA cm^-2 for the HER. Moreover, the electrocatalyst effectively worked as anode and cathode for overall water splitting system, showing a small voltage of 1.62 V to drive a current density of 10 mA cm^-2. The present work provides alternative option for fabricating advanced catalysts in electrocatalysis and energy devices.

Keywords: Bifunctional electrocatalyst; Electrocatalysis; Hydrogen evolution reaction; Overall water splitting; Oxygen evolution reaction.