Combinatorial Catalysis for Hydrogen Production from Ethanol
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Combinatorial Catalysis for Hydrogen Production from Ethanol Yusuke Yamada, Tomoki Akita, Tetsuo Umegaki, Mathew Thomas, Atsushi Ueda, Hiroshi Shioyama, Tetsuhiko Kobayashi Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan ABSTRACT Heterogeneous catalyst is one of the most important research targets of combinatorial materials. The difficulty in catalysis development by combinatorial method is due to its complexity. Catalysis is governed by not only materials composition which can be optimized with conventional combinatorial method but also by other factors such as reaction conditions. Even if high throughput experimentation is available, know-how on conventional catalysis development should be utilized for design of experiment for combinatorial catalysis. We achieved a novel catalyst for ethanol steam reforming by constructing fact-database on elemental reactions of ethanol steam reforming. The achieved catalyst consists of SnO2 and Rh/CeO2 in double layered form because SnO2 is a suitable catalyst for acetaldehyde formation from ethanol and Rh/CeO2 showed high activity toward steam reforming of acetaldehyde. The combination of suitable catalysts for the elemental reactions provides the highly active catalyst. INTRODUCTION Combinatorial technology has brought big success in the research field of pharmaceutical chemistry and other bio-related research fields. The success encouraged the application of combinatorial technology to materials development. The difference in biological study and materials study seems to be the present style of research target. The research target in biology is usually provided by nature, i.e., apriori, on the other hand, the target of material research should be found or created by ourselves based on our knowledge. High throughput experimentation and combinatorial technology are suitable both for creating a novel material in complex system and for constructing systematic database for the study of interaction among chemical species which is the origin of materials function. Materials showing high performance are often found in complex system as the result of interaction among several or more chemical species. In “Materiomics”, we identify the species working on by analytical tools such as electron microscopy. Also we investigate the effect of interaction among the
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species on materials function and how the species work together by various kinds of tools such as spectroscopic methods and theoretical calculation etc.[1] The fact database built by “Materiomics” leads to establishment of “Material informatics.” Among combinatorial materials research, the research field of heterogeneous catalyst is one of the most extensively developed fields.[2] For examples, several companies have commercialized equipments for high throughput experimentation and various kind of high throughput tools for the products analysis.[3] As far as we know, the first e
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