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Journal Articles

Mg-ion storage materials based on MnO$$_{2}$$ frameworks

Shimokawa, Kohei*; Hatakeyama, Takuya*; Li, H.*; Ichitsubo, Tetsu

Current Opinion in Electrochemistry, 38, p.101209_1 - 101209_8, 2023/04

https://doi.org/10.1016/j.coelec.2023.101209
 Times Cited Count：1 Percentile：35.25(Chemistry, Physical)

Journal Articles

Ligand exchange adsorption and coordination structure of Pd on $$delta$$-MnO$$_{2}$$ in NaCl solution

Tanaka, Kazuya; Tanaka, Masato*; Watanabe, Naoko*; Tokunaga, Kohei*; Takahashi, Yoshio*

Chemical Geology, 460, p.130 - 137, 2017/06

https://doi.org/10.1016/j.chemgeo.2017.04.022
 Times Cited Count：8 Percentile：34.27(Geochemistry & Geophysics)

Pd is highly accumulated in ferromanganese nodules and crusts relative to its concentration in seawater but the mechanism by which Pd(II) is incorporated remains poorly understood. We investigated the local coordination structure of Pd(II) adsorbed on $$delta$$-MnO$$_{2}$$, using X-ray absorption fine structure spectroscopy. X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) analyses indicated that Pd was adsorbed on $$delta$$-MnO$$_{2}$$ through ligand exchange, from Cl coordination to O coordination. Furthermore, curve fitting of EXAFS spectra demonstrated the formation of two different inner-sphere complexes, bidentate-mononuclear and bidentate-binuclear complexes, and this finding was supported by density functional theory calculations. The formation of inner-sphere complexes is reasonable given the relatively large distribution coefficients obtained from adsorption experiments.

Journal Articles

Charge ordering in low-doping rate A$$_{1-x}$$B$$_{x}$$MnO$$_{3}$$ (A:La,Pr;B:Sr,Ca)

Inami, Toshiya*; Hino, O.*; Nodo, S.*; Kaneo, Rinna*; Ikeda, Naoshi*; Yamada, Yasusada*; Katano, Susumu

Physica B; Condensed Matter, 241-243, p.433 - 435, 1998/00

https://doi.org/10.1016/S0921-4526(97)00611-X
 Times Cited Count：6 Percentile：42.7(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Adsorption of radioactive cobalt by mixture of Manganese oxide and montmorillonite

Onuki, Toshihiko

Journal of Nuclear Science and Technology, 27(11), p.1068 - 1071, 1990/11

https://doi.org/10.3327/jnst.27.1068

no abstracts in English

Oral presentation

Elucidation of microbial reduction of permanganate, and absorption behavior of heavy metals

Kato, Tomoaki*; Onuki, Toshihiko; Yu, Q.; Saito, Takumi

no journal, , 

no abstracts in English

5 (Records 1-5 displayed on this page)
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