Enhanced oxygen evolution activity by NiO x and Ni(OH) 2 nanoparticles
Year: 2014
Type: article
Abstract: Small nanoparticles of nickel oxide and nickel hydroxide were investigated for the oxygen evolution reaction (OER) in alkaline solutions. These nanoparticles showed excellent catalytic activity, giving a current density of 10 mA cm(-2) at overpotentials (η) of 300 and 330 mV for Ni(OH)(2) and NiO(x), respectively. The catalytic activity was comparable to that of the best mixed metal oxide catalysts under the same conditions. The activity was significantly higher than that of electrochemically formed Ni(OH)(2) and NiO(x) films, demonstrating the benefit of nanostructuring. Pretreatment of the working electrode was important for the activity and stability of the catalyst layer on the electrode.
Source: Faraday Discussions
DOI: 10.1039/c4fd00120f
Authors: Lucas-Alexandre Stern, Xile Hu
Institution: École Polytechnique Fédérale de Lausanne
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2018488318