NSF: MATERIALS WORLD NETWORK: HETEROGENEOUS CATALYST SYNTHESIS AT ACCESSIBLE, HIGH TEMPERATURES AND PRESSURES

NSF：材料世界网络：在可接近的高沸点和高沸点条件下的非均相催化剂合成。Bartley（卡迪夫大学，英国）这项研究涉及使用新材料科学方法制备新的非均相催化剂。该研究计划的总体目标是开发新的一步制备方法，用于目前通过多步工艺制备的非均相催化剂，该工艺使用在低温（<200 ℃）和低压（通常为1 bar）下形成的前体的热处理。具体目标将包括：a）在高压釜中使用高压和高温制备新型材料，低于临界点的（气/液/固）体系和高于临界点的两相体系;研究将首先集中在钒磷酸盐上，B）使用高温/高压流动反应器制备新材料，在该反应器中，混合物可以暴露于非-标准反应条件。在适当的情况下，将采用原位衍射和光谱技术来跟踪材料合成过程中发生的转变。该方法将用于探索氧化物和磷酸盐的制备。c）材料将作为烷烃氧化和氧化氢化的催化剂进行评估。d）所制备的材料将使用全方位的最先进的显微镜、光谱和衍射方法进行结构和化学表征。目的是确定结构/功能关系，作为改进催化剂设计的基础。这些目标将通过结合两个研究小组的专业知识来实现，这两个研究小组在一起进行合作研究方面有着16年的长期和非常成功的记录。由Hutchings教授领导的英国小组将带头研究新的催化剂制备方法。他们还将评估所生产的材料作为部分氧化催化剂的有用性。在Kiely教授的指导下，美国的贡献将是对所生产的催化剂进行详细的结构表征，目的是建立有意义的结构-功能关系。

NSF: MATERIALS WORLD NETWORK: HETEROGENEOUS CATALYST SYNTHESIS AT ACCESSIBLE, HIGH TEMPERATURES AND PRESSURES.C.J. Kiely (Lehigh University, USA) G.J. Hutchings & J.K. Bartley (Cardiff University, UK)This research relates to the preparation of new heterogeneous catalysts using a new materials science approach. The overall aim of this research program is to develop new one-step preparation methodologies for heterogeneous catalysts currently being made via multi-step processes using the heat treatment of precursors formed at low temperatures (<200 C) and low pressures (typically 1 bar). The project aims to Specific objectives will include:a) The preparation of novel materials using high pressures and temperatures in an autoclave utilizing three phase (gas/liquid/solid) systems below the critical point and two phase systems above the critical point; studies will focus initially on vanadium phosphates, and will subsequently be extended to niobium and molybdenum phosphates.b) The preparation of novel materials using a high temperature / high pressure flow reactor in which mixtures can be exposed to non-standard reaction conditions. Where appropriate in-situ diffraction and spectroscopy techniques will be employed to follow the transformations occurring during material synthesis. This method will be used to explore the preparation of oxides and phosphates.c) The materials will be evaluated as catalysts for alkane oxidation and oxidative hydrogenation.d) The materials prepared will be structurally and chemically characterized with a full range of state-of-the-art microscopy, spectroscopy and diffraction methods. The aim being to determine structure/function relationships as the basis of improved catalyst design.These goals will be achieved by combining the expertise of two research groups that have a long and very successful 16 year record of performing collaborative research together. The UK group, led by Professor Hutchings, will spearhead research into the new catalyst preparation methodologies. They will also assess the materials produced for their usefulness as partial oxidation catalysts. The USA contribution, under the direction of Professor Kiely, will be to perform detailed structural characterization of the catalysts produced with the aim of establishing meaningful structure-function relationships.