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Chemisorbed Oxygen Species over the (110) Face of SnO2

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Abstract

The electronic states of chemisorbed oxygen species on the (110) face of SnO2 and their variations caused by heat treatments and/or O2 exposure have been investigated. The reactivities of the chemisorbed oxygen species for methane oxidations were also examined.

Four different chemisorbed oxygen species (O2 2-, O2-, O-, Ob) were observed, in addition to the lattice oxygen (O2-), on the surface of the stabilized (110) surface of SnO2 after O2 exposure. The Ob species was assumed to be the bridging oxygen at the topmost layer of the SnO2 (110) surface having no neighboring oxygen vacancies. The electronic state of Ob was converted to O- upon CH4 exposure at 473 K by coupling with newly produced vacancies at the bridging site of the SnO2 (110) surface.

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Authors and Affiliations

  1. Research Institute of Innovative Technology for the Earth (RITE), 9-2 Kizugawadai, Kizu-cho, Soraku-gun, Kyoto, 619-0292, Japan

    Kenji Tabata

  2. Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara, 630-0101, Japan

    Kenji Tabata

  3. Shimadzu Corporation, Keihama Research Lab., 3-9 Hikaridai, Soraku-gun, Kyoto, 619-0237, Japan

    Takashi Kawabe

  4. Computational Science Laboratory, Information Communication Research Center, Kansai Research Institute, Kyoto Research Park 17, Chudoji Minami-machi, Shimogyo-ku, Kyoto, 600-8813, Japan

    Yoichi Yamaguchi

  5. Osaka Gas Corporation Limited, Utilization Technology Development, 1-1-3 Hokkou-Shiratsu, Konohana-ku, Osaka, 554-0041, Japan

    Yousuke Nagasawa

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  1. Kenji Tabata
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  2. Takashi Kawabe
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  3. Yoichi Yamaguchi
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  4. Yousuke Nagasawa
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Correspondence to Kenji Tabata.

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Tabata, K., Kawabe, T., Yamaguchi, Y. et al. Chemisorbed Oxygen Species over the (110) Face of SnO2 . Catalysis Surveys from Asia 7, 251–259 (2003). https://doi.org/10.1023/B:CATS.0000008164.21582.92

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  • DOI: https://doi.org/10.1023/B:CATS.0000008164.21582.92

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