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タイトル: Electronic origin of hydrogen storage in MOF-covered palladium nanocubes investigated by synchrotron X-rays
著者: Chen, Yanna
Sakata, Osami
Nanba, Yusuke
Kumara, Loku Singgappulige Rosantha
Yang, Anli
Song, Chulho
Koyama, Michihisa
Li, Guangqin
Kobayashi, Hirokazu
Kitagawa, Hiroshi
著者名の別形: 坂田, 修身
難波, 優輔
古山, 通久
小林, 浩和
北川, 宏
キーワード: Electron transfer
Hydrogen storage
Metal-organic frameworks
発行日: 9-Oct-2018
出版者: Springer Nature America, Inc
誌名: Communications Chemistry
巻: 1
論文番号: 61
抄録: Hybrid materials composed of metal nanoparticles and metal-organic frameworks have attracted attention for various applications because of the synergistic functionality between their constituent materials. Interfacial interaction is expected however the mechanism remains ambiguous. Here we report the valence bands of palladium nanocubes covered by copper(II) 1, 3, 5-benzenetricarboxylate (HKUST-1), denoted as Pd@HKUST-1, and the charge transfer from the palladium nanocubes to HKUST-1 at the Pd/HKUST-1 interface is investigated quantitatively. Interfacial density of states are different from those of internal constituents and imply that the Cu-O group in HKUST-1 acts as a charge accepter. The role of Cu-O group in charge transfer behaviour is also observed experimentally. Finally, we reveal the charge transfer mechanism from the Pd 4d bands to the Cu 3d (4sp) - O 2p hybridization bands of HKUST-1 at the Pd/HKUST-1 interface, which explains the enhanced hydrogen storage capacity in Pd@HKUST-1.
記述: Pd-MOFハイブリッド材料の界面電子状態と水素貯蔵特性の関係の定量的な解析に成功 --電子約0.4個分の電荷移動が約2倍の特性向上に寄与 新規ハイブリッド材料開発の促進が期待--. 京都大学プレスリリース. 2018-10-11.
著作権等: © The Author(s) 2018. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
URI: http://hdl.handle.net/2433/234703
DOI(出版社版): 10.1038/s42004-018-0058-3
関連リンク: http://www.kyoto-u.ac.jp/ja/research/research_results/2018/181009_1.html
出現コレクション:学術雑誌掲載論文等

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