Jump to main content
Jump to site search

Issue 5, 2019
Previous Article Next Article

Boosting electrochemical water splitting via ternary NiMoCo hybrid nanowire arrays

Author affiliations

Abstract

Hydrogen production by electrochemical water splitting is a technology with the potential to meet the growing worldwide demand for sustainable and clean energy. However, the development of cost-effective catalysts to replace noble metals, such as platinum or ruthenium, remains crucial for large-scale hydrogen production. This study presents the synthesis of a transition non-noble metal-based ternary NiMoCo hybrid nanowire array as an efficient bifunctional electrocatalyst for overall water splitting in 1.0 M KOH electrolyte. The catalyst exhibits a low cell voltage of 1.56 V to achieve a water-splitting current density of 10 mA cm−2 together with long-term stability with only 5% of the initial current lost after 100 hours. X-ray absorption spectroscopy confirms that the addition of Co to the binary Ni–Mo system results in a highly mixed chemical binding state with modulated electronic structures. Density functional theory (DFT) calculations reveal that the Co atoms on the ternary alloy become catalytically active sites and facilitate adsorption of intermediates by ensuring preferable interactions between the reactants and the catalyst surface in comparison to the binary counterpart. This work provides a new direction along which to activate binary alloys to further enhance their catalytic abilities in overall water splitting.

Graphical abstract: Boosting electrochemical water splitting via ternary NiMoCo hybrid nanowire arrays

Back to tab navigation

Supplementary files

Article information


Submitted
22 Nov 2018
Accepted
17 Dec 2018
First published
11 Jan 2019

J. Mater. Chem. A, 2019,7, 2156-2164
Article type
Paper
Author version available

Boosting electrochemical water splitting via ternary NiMoCo hybrid nanowire arrays

K. Hu, M. Wu, S. Hinokuma, T. Ohto, M. Wakisaka, J. Fujita and Y. Ito, J. Mater. Chem. A, 2019, 7, 2156
DOI: 10.1039/C8TA11250A

Social activity

Search articles by author

Spotlight

Advertisements