Electrodeposited Ni-P alloy thin films for alkaline water splitting reaction

International Conference on Advances in Materials and Manufacturing Applications 2016

Elias, Liju^1 ; Damle, Vinayaka H.^2 ; Hegde, A. Chitharanjan^1

Electrochemistry Research Lab, Department of Chemistry, India^1

Department of Metallurgical and Materials Engineering, National Institute of Technology Karnataka, Surathkal Srinivasnagar

575 025, India^2

关键词: Electrocatalytic performance;    Electrodeposition technique;    Energy dispersive spectroscopies (EDS);    Field emission scanning electron microscopy;    Hydrogen evolution reactions;    Ni-P alloy;    Oxygen evolution reaction;    Water splitting reactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012179/pdf
DOI  :  10.1088/1757-899X/149/1/012179

来源: IOP

【 摘 要 】

Ni-P alloy thin films was developed as a robust electrode material for alkaline water splitting for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), through electrodeposition technique. The influence of alloy composition, achieved through induced codeposition of the reluctant non-metal, i.e. phosphorous (P) on its electrocatalytic activity was studied, and arrived at the best composition of alloy for HER and OER. The water splitting efficacy of the alloy films was tested in 1.0 M KOH using electrochemical methods such as cyclic voltammetry and chronopotentiometry. The experimental observation shows that the alloy thin film with 9.0 wt.% of P and 4.2 wt.% of P are the best electrode materials for HER and OER, respectively. The electrocatalytic performance of alloy films towards HER and OER were related to its surface topography, composition and crystal structure through field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) analyses, respectively.