Highly active nickel-cobalt/nanocarbon thin films as efficient water splitting electrodes

Bayatsarmadi, Bita and Zheng, Yao and Russo, Valeria and Ge, Lei and Casari, Carlo Spartaco and Qiao, Shi-Zhang (2016) Highly active nickel-cobalt/nanocarbon thin films as efficient water splitting electrodes. Nanoscale, 8 (43). ISSN 2040-3364

Abstract

Developing low cost, highly active and stable electrocatalysts for both the hydrogen evolution reaction
(HER) and the oxygen evolution reaction (OER) using the same electrolyte has remained a major challenge. Herein, we report a novel and robust material comprised of nickel–cobalt nanoparticles coated on a porous nitrogen-doped carbon (NC) thin film synthesized via a two-step pulsed laser deposition technique. The optimized sample (Ni0.5Co0.5/NC) achieved the lowest overpotentials of 176 mV and 300 mV at a current density of 10 mA cm−2 for HER and OER, respectively. The optimized OER activity might be
attributed to the available metal oxide nanoparticles with an effective electronic structure configuration and enhanced mass/charge transport capability. At the same time, the porous nitrogen doped carbon incorporated with cobalt and nickel species can serve as an excellent HER catalyst. As a result, the newly developed electrocatalysts manifest high current densities and strong electrochemical stability in overall water splitting, outperforming most of the previously reported non-precious metal-based catalysts.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: No Faculty
Date Deposited: 19 Apr 2017 07:00
Last Modified: 28 Apr 2017 04:01
Uncontrolled Keywords: catalysts; cobalt; deposition; doping (additives); electrocatalysts; metal nanoparticles; nanoparticles; nitrogen; pulsed laser deposition; synthesis (chemical); thin films
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/c6nr06961d
URI: http://eprints.usq.edu.au/id/eprint/31128

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