Controlled ensemble size and elucidation of structure-sensitivity: a new approach in nitride catalysis

受控系综尺寸和结构敏感性阐明：氮化物催化的新方法

• 批准号: EP/J018384/1
• 负责人: Justin Hargreaves
• 金额: $ 39.54万
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FJ018384%2F1
• 关键词: Controlled; ensemble; size; elucidation; structure; Controlled; ensemble; size; elucidation; structure

Most industrial chemical processes use catalysts to enhance the rate at which a reaction proceeds or to favour a specific product. Catalysts thus lead to significant savings in the energy used for large scale processes and a reduction in the amount of waste generated. Amongst the catalysts applied, heterogeneous catalysts are the most practical due to the ease of their separation from product streams. This project will combine synthetic and application based advances to metal nitrides which are an emerging class of heterogeneous catalyst with interesting and distinctive properties. The approach taken is to exert control over both the size and composition of active centres dispersed within a host matrix. Controlled ensemble size has proven to be a powerful approach with other categories of catalysts. We propose to develop novel materials with enhanced activity for ammonia synthesis, a vitally important reaction on a global scale for which some metal nitrides have already shown activity of potential interest for industrial application. We also plan to target high activities in two other important processes - ammonia decomposition, which is a potential clean hydrogen source for renewable energy applications, and ammoxidation, important in chemicals synthesis. The latter is a particularly challenging target which requires catalyst design that combines different functionalities within active centres. Our programme combines the development of catalyst synthesis routes, which will be used to control the size and elemental composition of the catalytic sites with extensive catalyst testing, involving reactions performed under industrially relevant conditions.

大多数工业化学过程都使用催化剂来增强反应进行或偏爱特定产品的速率。因此，催化剂可大量节省用于大规模过程的能量，并减少产生的废物量。在应用的催化剂中，由于它们与产品流的分离易于分离，因此最实用的催化剂是最实用的。该项目将将基于合成和应用的基于金属氮化物的进步结合在一起，金属氮化物是新兴类别的异质催化剂类别，具有有趣且独特的特性。采用的方法是对分散在主机矩阵内的活性中心的大小和组成的控制。事实证明，受控的合奏尺寸是其他类别的催化剂的强大方法。我们建议开发具有氨合成活性增强的新型材料，这是在全球范围内具有至关重要的反应，某些金属硝酸盐已经显示出对工业应用的潜在兴趣活性。我们还计划在其他两个重要过程中靶向高活性 - 氨分解，这是可再生能源应用的潜在清洁氢源，并且在化学物质合成中很重要。后者是一个特别具有挑战性的目标，需要催化剂设计，结合了活跃中心内的不同功能。我们的计划结合了催化剂合成途径的开发，该途径将用于控制催化位点的大小和元素组成和广泛的催化剂测试，涉及在工业相关条件下进行的反应。