期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 36, 页码 30273-30282出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b06730
关键词
three-dimensional printing; robocasting; electroless nickel coating; oxygen evolution reaction; Ni-P alloy film
资金
- Saint Gobain [R-284-000-140-597]
- NUS Strategic Research Fund [R-261-509-001-646, R-261-509-001-733]
- [NRF-CRP16-2015-01 (R-284-000-159-281)]
Recently, 3d metal phosphide and metal-phosphorus alloy have been intensively studied for the oxygen evolution reaction (OER). Research work has indicated that the presence of phosphorus could lead to the formation of a phosphide/(hydro)-oxide core/shell structure. In this work, we have developed a fabrication technique for a robust NiOOH@amorphous Ni-P bilayer on a zirconia mesh support through the collaboration of electroless deposition and robocasting. During the electroless deposition, a fully amorphous structure can be obtained with a certain phosphorus content (7-8 wt %). Relatively thick films (in the order of 5 mu m) had an excellent adhesion on the mesh structure because of the large curvature. A stable Ni oxy/hydroxide surface (similar to 200 nm) can be formed in bilayer nature (NiOOH/Ni-P) due to preactivation. The combination of catalyst active sites on the surface and high conductivity of metallic body enables good OER performance with an overpotential of 286 mV at a current density of 10 mA cm(-2). Together with excellent chemical stability and mechanical strength of the ceramic substrate, this novel combination gives rather excellent adhesion and stability in alkaline solution and provides a different angle for the hierarchical design of corrosion resistant and high-performance OER electrodes for industry.
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