The Electro-Deposition/dissolution of CuSO4 aqueous electrolyte investigated by in situ soft x-ray absorption spectroscopy

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题名:	The Electro-Deposition/dissolution of CuSO4 aqueous electrolyte investigated by in situ soft x-ray absorption spectroscopy
作者:	Juan-Jesús Velasco-Vélez;Katarzyna Skorupska;Elias Frei;Yu-Cheng Huang;Chung-Li Dong§;Bing-Jian Su;Cheng-Jhih Hsu§;Hung-Yu Chou;Jin-Ming Chen;Peter Strasser;Robert Schlog;Axel Knop-Gericke;Cheng-Hao Chuang
日期:	2017-10
上传时间:	2018-06-08 12:10:18 (UTC+8)
摘要:	The electrodeposition nature of copper on a gold electrode in a 4.8 pH CuSO4 solution was inquired using X-ray absorption spectroscopy, electrochemical quartz crystal microbalance, and thermal desorption spectroscopy techniques. Our results point out that the electrodeposition of copper prompts the formation of stable oxi-hydroxide species with a formal oxidation state Cu+ without the evidence of metallic copper formation (Cu0). Moreover, the subsequent anodic polarization of Cu2Oaq yields the formation of CuO, in the formal oxidation state Cu2+, which is dissolved at higher anodic potential. It was found that the dissolution process needs less charge than that required for the electrodeposition indicating a nonreversible process most likely due to concomitant water splitting and formation of protons during the electrodeposition.
關聯:	J. Phys. Chem. B 122(2), p.780-787
DOI:	10.1021/acs.jpcb.7b06728
显示于类别:	[物理學系暨研究所] 期刊論文

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