Thermodynamic Measurements of Redox Properties of Supported Oxide Catalysts

摘要提案标题：负载型氧化物催化剂氧化还原性质的热力学测量提案编号：CTS -0625324主要研究者： John A. Vohs机构： 宾夕法尼亚大学分析（决策依据）：该研究项目将开发库仑滴定技术的新应用，以直接测量支撑单层，金属氧化物和选择性氧化催化剂的氧化和还原热。 然后，该分析技术将最初用于表征负载型氧化钒催化剂，并且还可能用于表征负载型氧化钒和氧化铬催化剂。 该程序将首次使用库仑滴定法直接测量负载型氧化物催化剂的氧化熵和氧化熵。测量将在表征良好的负载型金属氧化物催化剂上进行，作为催化剂负载量和载体组成的函数，以便从根本上了解这些参数如何影响催化剂性能。这些数据将与文献中的结果相关联，以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商业上重要的催化剂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，用于测量关键的，但很难获得，氧化催化剂的性能。第二个重要的成果将是产生新的见解，如何负载氧化物催化剂的结构和组成影响这些商业上重要的材料的氧化自由能和自由能。最后，重要的见解，使负载型氧化物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重大的。除了培训将开展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。 研究计划的一部分将由本科工程专业的学生和高中学生在学年和夏季进行。

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.