Electrodeposition of Ni and CeO2/Ni Nanotubes for Hydrogen Evolution Reaction Electrode
| Autor: | Xiaoqing Du, Zhao Zhang, Yi Chenxi, Yu Chen, Yumeng Yang, Chao Cai |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Tafel equation
Materials science Hydrogen Scanning electron microscope Biomedical Engineering Analytical chemistry chemistry.chemical_element Bioengineering General Chemistry Condensed Matter Physics Crystal chemistry Specific surface area Electrode General Materials Science High-resolution transmission electron microscopy Voltammetry |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 18:4865-4875 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2018.15269 |
| Popis: | Ni NTs and CeO2-Ni nanotubes (NTs) have been prepared by galvanostatic electrodeposition in anodic aluminum oxide (AAO) Templates. Scanning electron microscope (SEM), high resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopic (EDS) and X-ray Diffraction (XRD) are used to characterize the prepared NTs. The results showed that the preparation process of CeO2-Ni NTs was accompanied by the formation of many new phases CeNix (x = 1, 2, 3.5 or 5) and preferential orientation crystal face of Ni in CeO2-Ni NTs is 〈111〉, which is different from that Ni 〈200〉 in Ni NTs. Then linear scan voltammetry (LSV) is applied to test the electrocatalytic activity for hydrogen revolution reaction (HER) of the two electrodes in 1 M NaCl aqueous solution and find that both of the two materials exhibited good performance. Finally, the kinetics analyses from the HER process showed that Tafel slope b was mainly dependent on phase composition and electric conductivity of the electrode, while j0 was mainly dependent on its real specific surface area. |
| Databáze: | OpenAIRE |
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