Hierarchical Design of NiOOH@Amorphous Ni–P Bilayer on a 3D Mesh Substrate for High-Efficiency Oxygen Evolution Reaction
| Autor: | Xi Xu, Aaron Ong, Yanqing Wang, Erwin Peng, Xinwei Li, Chaojiang Li, Jun Ding, Jiahao Gwendolyn Lim |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Phosphide Bilayer Alloy Oxygen evolution 02 engineering and technology Substrate (electronics) Overpotential engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid chemistry.chemical_compound chemistry Chemical engineering engineering General Materials Science Cubic zirconia 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 10:30273-30282 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.8b06730 |
| Popis: | 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 μm) had an excellent adhesion on the mesh structure because of the large curvature. A stable Ni oxy/hydroxide surface (∼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. Togeth... |
| Databáze: | OpenAIRE |
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