Metal-Support Interaction in Oxide-Supported Fine Metal Particles

氧化物负载细金属颗粒中的金属负载相互作用

• 批准号: 60470077
• 负责人: UCHIJIMA Toshio
• 金额: $ 4.42万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60470077/
• 关键词: Strong Metal-Support Interaction; SMSI; Supported Metal Catalyst; Niobia, Ensemble effect; Structure-sensitive reaction; アンサンブル; 構造敏感反応

The <Nb_2> <O_5> -supported Rh and <Nb_2> <O_5> -promoted Rh catalysts have been characterized by <H_2> and CO chemisorption, TPD, FTIR, and various catalytic reactions such as CO hydrogenation, ethane hydrogenolysis, and cyclohexane dehydrogenation and hydrogenolysis. There appeared to be some differences in the nature of strong metal-support interaction (SMSI) between Rh/ <Nb_2> <O_5> and Rh/ <TiO_2> : (1) SMSI in Rh/ <Nb_2> <O_5> is partly induced even by a low-temperature reduction (LTR) followed by evacuation in vacuo at 723 K; (2) there was much more drastic suppression in the hydrogenolysis activity by the Rh- <Nb_2> <O_5> interaction than the Rh- <TiO_2> interaction; and so on. The <Nb_2> <O_5> -promoted Rh catalyst, containing <Nb_2> <O_5> deposited onto a Rh/ <SiO_2> catalyst, also exhibit the SMSI behavior, in which the interaction was as strong as that in Rh/ <Nb_2> <O_5> . A possible model for SMSI was discussed in the light of these results.

<Nb_2> <O_5>负载的Rh和<Nb_2> <O_5>促进的Rh催化剂通过<H_2>和CO化学吸附、TPD、FTIR以及各种催化反应如CO加氢、乙烷氢解、环己烷脱氢和氢解等进行了表征。 Rh/ <Nb_2> <O_5> 和 Rh/ <TiO_2> 之间的强金属-载体相互作用 (SMSI) 的性质似乎存在一些差异：(1) Rh/ <Nb_2> <O_5> 中的 SMSI 甚至是通过低温还原 (LTR) 和随后在 723 K 真空中抽空而部分诱导的； (2)Rh-<Nb_2><O_5>相互作用比Rh-<TiO_2>相互作用对氢解活性的抑制更为剧烈；等等。 <Nb_2> <O_5> 促进的 Rh 催化剂（包含沉积在 Rh/ <SiO_2> 催化剂上的 <Nb_2> <O_5>）也表现出 SMSI 行为，其中相互作用与 Rh/ <Nb_2> <O_5> 中的相互作用一样强。根据这些结果讨论了 SMSI 的可能模型。

项目成果

国森公夫 等: Applied Catalysis. 22. 115-122 (1986)

Kimio Kunimori 等人：应用催化。22. 115-122 (1986)

K. Kunimori et al.,: "Evaluation of the Percentage Exposed (Metal Dispersion) of Carbon-Supported Pt Catalysts" Denki Kagaku. 54. 868-873 (1986)

K. Kunimori 等人：“碳负载 Pt 催化剂暴露百分比（金属分散体）的评估”Denki Kagaku。

国森公夫 等: Chemistry Letters. 1986. 573-576 (1986)

Kimio Kunimori 等人：化学快报 1986。573-576 (1986)

国森公夫 等: J.C.S.Chemical Communications. 965-966 (1986)

Kimio Kunimori 等人：J.C.S.化学通讯 965-966 (1986)

K. Kunimori et al.,: "Catalytic Performance of Egg-white Type Pt/ <Al_2> <O_3> Catalyst: Multiple Steady States in the Oxidation of CO" Applied Catalysis. 22. 115-122 (1986)

K. Kunimori 等人：“蛋清型 Pt/<Al_2><O_3> 催化剂的催化性能：CO 氧化中的多个稳态”应用催化。