Thermodynamic Measurements of Redox Properties of Supported Oxide Catalysts

摘要提案题目：负载氧化物催化剂氧化还原性能的热力学测量提案号：CTS - 0625324首席研究员：John a . VohsInstitution: University of宾夕法尼亚大学分析（决策依据）：该研究项目将开发一种新的应用库仑滴定技术来直接测量负载单层，金属氧化物和选择性氧化催化剂的氧化和还原热。这种分析技术将首先用于表征负载型钼催化剂，也可能用于表征负载型钒和铬催化剂。该程序将首次使用库仑滴定法直接测量负载氧化物催化剂的氧化焓和氧化熵。这些测量将在表征良好的负载型金属氧化物催化剂上进行，作为催化剂负载和负载成分的函数，以便对这些参数如何影响催化剂性能有一个基本的了解。这些数据将与文献中的结果相关联，以便了解热力学性质与催化性能的关系。这些相关性将大大提高对这些重要的商业催化剂的活性和选择性的理解。这项工作的一个重要成果将是开发一种新的、普遍适用的技术，用于测量氧化催化剂的关键但难以获得的性质。第二个重要的结果将是对负载氧化物催化剂的结构和组成如何影响这些重要商业材料的氧化焓和自由能产生新的见解。最后，重要的见解，使负载氧化物的活性和选择性催化剂的因素将获得。这项工作的教育影响也将是显著的。除了培养将进行大部分研究的博士生外，该项目还将包括本科生和高中生的教育。研究项目的一部分将由工程专业的本科生和高中生在学年和暑假期间完成。

AbstractProposal Title: Thermodynamic Measurements of Redox Properties of Supported Oxide Catalysts Proposal Number: CTS - 0625324Principal Investigator: John A. VohsInstitution: University of PennsylvaniaAnalysis (rationale for decision): This research program will develop a novel application of a Coulomb titration technique to directly measure the heats of oxidation and reduction of supported monolayer, metal oxide, and selective oxidation catalysts. This analysis technique will then initially be used to characterize supported molybdena catalysts, and potentially also supported vanadia and chromia catalysts. This program will directly measure, for the first time, the enthalpies and entropies of oxidation of supported oxide catalysts using Coulomb titration measurements. The measurements will be performed on well-characterized, supported metal oxide catalysts as a function of catalyst loading and support composition in order to develop a fundamental understanding of how these parameters affect catalyst performance. The data will be correlated with results from the literature in order to understand how the thermodynamic properties relate to catalytic performance. These correlations will significantly improve the understanding of what makes these commercially important catalysts active and selective. One important outcome of this work will be the development of a new, generally applicable technique for measuring critical, but difficult to obtain, properties of oxidation catalysts. A second important outcome will be the generation of new insights into how the structure and composition of supported oxide catalysts affect the enthalpies and free energies of oxidation for these commercially important materials. Finally, important insights into the factors that make supported oxides active and selective catalysts will be obtained. The educational impact of this work will also be significant. In addition to training of the PhD students that will carry out the majority of the research, education of both undergraduates and high school students will be included in the project. A portion of the research program will be performed by both undergraduate engineering students and by high-school students, during the school year and over the summers.