教師資料查詢 | 類別: 期刊論文 | 教師: 董崇禮 CHUNG-LI DONG (瀏覽個人網頁)

標題:Trends in activity and stability of electrodeposited 3d transition metals on gold revealed by operando soft X-ray absorption spectroscopy during water splitting
學年105
學期1
出版(發表)日期2016/09/01
作品名稱Trends in activity and stability 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14. J. Velasco Velez; T. Jones; V. Pfeifer; C. L. Dong; Y. X. Chen; C. M. Chen; H. Y. Chen; Y. R. Lu; J. Chen; R. Schlogl; 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, 024002
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.
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語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版
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