期刊論文
| 學年 | 105 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2016-12-02 |
| 作品名稱 | Trends in reactivity of electrodeposited 3d transition metals on gold revealed by operando soft x-ray absorption spectroscopy during water splitting |
| 作品名稱（其他語言） | |
| 著者 | J J Velasco-Vélez; Travis E Jones; Verena Pfeifer; Chung-Li Dong; Yu-Xun Chen; Chieh-Ming Chen; Hsin-Yu Chen; Ying-Rui Lu; Jin-Ming Chen; R Schlögl; A Knop-Gericke; C-H Chuang |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of Physics D: Applied Physics 50 (2), p.024002(10 pages) |
| 摘要 | We activated gold electrodes for their use as electrocatalyst for water splitting by electrodepositing Cu, Ni and Co. A combination of operando x-ray absorption spectroscopy and potentiometric control under aqueous conditions revealed the trends in reactivity yielded by these electrodes, which are directly associated with the cross- and overpotentials as well as the occupancy of the 3d orbitals. It was found that under anodic polarization the materials electrodeposited on gold suffer from a lack of stability, while under cathodic polarization they exhibit stable behavior. The observed activity is strongly related to the lack of stability shown by these composites under anodic polarization revealing a dynamic process ruled by corrosion. By operando x-ray absorption, we established that the overall enhancement of the activity for the oxygen evolution reaction is directly attributable to the cross-potential and corrosion process of the electrodeposited materials. It is associated with the high potential deposition, which is the origin of the incipient oxidation-corrosion resistance of the lattice. We conclude that the observed trends in the total current are directly associated with the loss of oxygen in the metal-oxide lattice and the subsequent dissolution of metallic ions in the electrolyte under anodic polarization. |
| 關鍵字 | operando soft x-ray absorption;trends in activity/stability;3d transition metals;water splitting |
| 語言 | en |
| ISSN | 1361-6463 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | J J Velasco-Vélez;Cheng-Hao Chuang |
| 審稿制度 | 是 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109220 ) |