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.

在这项研究中，已经在研究了这些催化剂的小毛孔中制备了贵重金属混合氧化物，例如RHVOI D24，RHVOI D2MNOI D24，RHLAOI D23，D2，D2，D2，D2，如二氧化硅，USY沸石和催化性能。 RHVOI D24可以在高温下的VII D22，D2OI D25的高迁移率的帮助下制备。通过还原混合氧化物获得了高度分散的RH金属，并在高温还原后诱导强金属氧化物相互作用（SMSI）。此外，可以通过钙处理来再生混合的氧化催化剂，从而导致高溶质催化剂系统。催化反应，例如CO氢化，NYI D22E D2O分解，在这些催化剂上已经研究了氢气中的选择性CO氧化物。特别是，在二氧化硅上支持的RHVOII D24E D2表明，混合氧化物还原后，对乙醇的高活性和高选择性。分子在沸石微孔中的动态行为也已经研究了。

项目成果

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)。

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。

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)

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)。

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)