Preparation, Reduction and Catalytic Properties of Precious metal mixed oxides in small pores

小孔贵金属混合氧化物的制备、还原及催化性能

• 批准号: 10650769
• 负责人: KUNIMORI Kimio
• 金额: $ 1.92万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650769/
• 关键词: Microporous materials; Zeolite; Silica; Precious metal mixed oxides; NィイD22ィエD2O decomposition; CO hydrogenation; SMSI; RhVOィイD24ィエD2

In this study, precious metal mixed oxides such as RhVOィイD24ィエD2, RhィイD22ィエD2MnOィイD24ィエD2, RhLaOィイD23ィエD2 have been prepared in small pores of support materials such as silica, USY zeolite, and catalytic properties of these catalysts have been investigated. RhVOィイD24ィエD2 could be prepared in NaY zeolite with the aid of the high mobility of VィイD22ィエD2OィイD25ィエD2 at high temperatures. Highly dispersed Rh metal was obtained by the reduction of the mixed oxides, and strong metal-oxide interaction (SMSI) was induced after the high-temperature reduction. Moreover, the mixed oxide catalysts could be regenerated by the calcination treatment, which leads to high-perfonace catalyst systems.Catalytic reactions such as CO hydrogenation, NィイD22ィエD2O decomposition, selective CO oxidation in hydrogen have been studied on these catalysts. In particular, RhVOィイD24ィエD2 supported on silica showed high activity and high selectivity to ethanol after the reduction of the mixed oxide. Dynamic behavior of molecules in the micropores of zeolite has also been studied.

本研究以SiO2、USY分子筛等载体材料为载体，制备了RhVO_（24）Al_（22）Al_（23）Al_（22）Al_（24）Al_（22）Al_（23）Al_（22）Al_利用V ↓ [2] O ↓ [25] O ↓ [22] O ↓ [25] O ↓ [26] O ↓ [27] O ↓ [28] O ↓ [29] O ↓ [2混合氧化物的还原得到了高度分散的Rh金属，高温还原后诱导了强的金属-氧化物相互作用（SMSI）。此外，复合氧化物催化剂还可以通过焙烧处理再生，得到高性能的催化剂体系，并在此催化剂上进行了CO加氢、N-氧化物D22-D2 O分解、CO选择性氧化等催化反应的研究。特别地，在还原混合氧化物之后，负载在二氧化硅上的RhVO纳米D24纳米D2显示出高活性和对乙醇的高选择性。研究了分子在沸石微孔中的动力学行为。

项目成果

湯崎 浩一: "Cetalytic Decomposition of N_2O over NaY- and USY-supported Rh catalysts"Materials Research Society. IV. 2863-2868 (1999)

Koichi Yuzaki：“NaY 和 USY 负载的 Rh 催化剂上 N_2O 的催化分解”材料研究学会 IV 2863-2868。

伊藤伸一: "Rh添加V_2O_5lSiO_2触媒によるC_3h_8の脱水素反応"日本化学会誌. 1999,No.8. 553-555 (1999)

伊藤真一：“使用Rh添加的V_2O_5lSiO_2催化剂的C_3h_8脱氢反应”日本化学会志1999年第8期553-555(1999)。

杉 義弘: "Effects of ceria-modification of H-mordenite on isopropylation"Studies in Surface Science and Catalysis. 125. 359-366 (1999)

Yoshihiro Sugi：“H-丝光沸石的二氧化铈改性对异丙基化的影响”表面科学与催化研究 125. 359-366 (1999)

T. Kuriyama, K. Kunimori, H. Nozoye: "Adsorption of carbon monoxide on a SmOィイD2XィエD2 Film"Chem. Commun.. 501-502 (1998)

T. Kuriyama、K. Kunimori、H. Nozoye：“SmO-D2X-D2 薄膜上一氧化碳的吸附”Chem. 501-502 (1998)

国森 公夫: "CO hydrogenation over a rhodium vanadate catalyst" Catalysis Today. 44. 145-149 (1998)

Kimio Kunimori：“钒酸铑催化剂上的 CO 加氢”《今日催化》44. 145-149 (1998)。