Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 30, Issue 15, Pages 13895-13909Publisher
SPRINGER
DOI: 10.1007/s10854-019-01707-0
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Funding
- National Natural Science Foundation of China [21703208]
- Natural Science Foundation of Shanxi [201701D221047]
- Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi [201802077]
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Nickel has attracted much attention as a cheap and readily available electrocatalyst towards the electrooxidation of hydrogen peroxide (H2O2). For the electrocatalytic reaction, the larger the surface area of the electrode, the more active sites can be provided, and the better the catalytic performance of the electrode can be achieved. In this paper, a three-dimensional (3D) porous electrode was successfully prepared by a simple two-step method. Firstly, the Ni-SiO2 composite was uniformly deposited on the carbon paper (CP) by electrodeposition, and then the SiO2 component in the Ni-SiO2 composite was removed by after dealloying (AD) to form a Ni-SiO2/CP (AD) electrode with a 3D porous structure, which has high catalytic activity area and good gas-liquid mass transfer property. The prepared Ni-SiO2/CP (AD) exhibits superior catalytic activity for H2O2 electrooxidation. At normal temperature, Ni-SiO2/CP (AD) in 1.0 mol dm(-3) NaOH + 0.2 mol dm(-3) H2O2 electrolyte solution, the oxidation current density reached 355 mA cm(-2), which is 1.85 times the Ni/CP current density under the same conditions. This study provides a new idea for preparation of high catalytic activity of Ni catalyst for the electrooxidation of H2O2.
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