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oai:docta.ucm.es:20.500.14352/1172762025-03-18T12:24:44Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Muñoz Noval, Álvaro author Fukami, Kazuhiro author Koyama, Akira author Kuruma, Takuya author Kitada, Atsushi author Murase, Kuniaki author Abe, Takeshi author Sakka, Tetsuo author Hayakawa, Shinjiro author 2017-08-15 Recent studies have revealed that electrochemistry at the nanometer scale is profoundly different from its conventional framework. We reported that the combination of a hydrophobic nanoporous electrode and low-charge-density metal ions resulted in a drastic acceleration in the electrodeposition reaction. In the present study, we analyzed Zn embedded in nanoporous silicon by X-ray absorption fine structure spectroscopy. As a precursor to Zn electrodeposition, Zn(II) chelate was used under different pH conditions. The spectroscopy results clearly suggest that the accumulation of Zn(II) chelate occurred at pH conditions where the Zn(II) chelate had zero charge. The accumulation resulted in the promotion of Zn electrodeposition within confined nanopores. Based on this spectroscopic investigation, we propose a model for the accelerated electrodeposition of Zn in confined nanopores. Muñoz-Noval, Á., Fukami, K., Koyama, A., Kuruma, T., Kitada, A., Murase, K., Abe, T., Sakka, T., Hayakawa, S., 2017. Mechanism of Accelerated Zinc Electrodeposition in Confined Nanopores, Revealed by X-ray Absorption Fine Structure Spectroscopy. J. Phys. Chem. C 121, 18047–18056. https://doi.org/10.1021/acs.jpcc.7b05994 1932-7447 10.1021/acs.jpcc.7b05994 https://hdl.handle.net/20.500.14352/117276 1932-7455 https://doi.org/10.1021/acs.jpcc.7b05994 https://pubs.acs.org/doi/full/10.1021/acs.jpcc.7b05994 Mechanism of accelerated zinc electrodeposition in confined nanopores, revealed by x-ray absorption fine structure spectroscopy