Gas phase synthesis of metal-oxide clusters and their composition dependence of reactivity toward small molecules

2014 Fiscal Year Final Research Report

• Project/Area Number: 24550010
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: MIYAJIMA Ken 東京大学, 総合文化研究科, 助教 (20365456)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: クラスター / 昇温脱離 / 反応 / 脱離 / 質量分析 / レーザー蒸発

Outline of Final Research Achievements

The reactivity of gas-phase multi-element clusters was investigated aiming for exhaustive search of promising combinations of elements and compositions for exhaust gas catalysts. In line with this objective the behavior in post heating and the reactivity to small gaseous molecules (nitric oxide) of copper and cerium oxide clusters was measured. It was found that reaction temperature range of oxygen desorption and estimated activation energy of desorption correlate significantly with the deviation from the stoichiometric composition. In addition, the reactivity toward small gaseous molecules also correlates with the deviation from the stoichiometric composition. This study showed that this gas-phase temperature programmed desorption of multi-element clusters provides new information on activation energy barrier comparable to other experimental and theoretical studies.

Free Research Field

気相クラスター化学