Metal organic frameworks as catalysts for improving the efficiency of photocatalytic reactions 1=Energy 2=Catalysis

金属有机骨架作为催化剂提高光催化反应效率 1=能量 2=催化

• 批准号: 2011505
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2011505
• 关键词: Metal; organic; frameworks; catalysts; improving

Plants have evolved to harvest solar energy and use the harvested energy to convert carbon dioxide and water into carbohydrates via photosynthesis. Inspired by the natural photosynthesis, artificial systems and devices using inorganic and organic materials to perform similar photochemical reactions has attracted considerable attention as a potential means of renewable energy production with no reliance on fossil fuels and no carbon dioxide emission. Photocatalytic water splitting forms hydrogen and oxygen which could be efficiently converted to electricity in fuels cells that has potential to energise the electric cars being built. In addition, photocatalytic reduction of CO2 not only removes CO2 from the atmosphere but also provides fuels that is much easier to store, distribute, and utilize within the existing energy supply infrastructure As a new family of inorganic-organic hybrid materials, metal-organic frameworks (MOFs) serve as an interesting platform to design and study artificial photosynthetic systems. MOFs can in principle contain photosensitizers and catalytic centers in a single solid and provide the structural organization to integrate the fundamental steps of artificial photosynthesis into a single material. The photoactivities of MOF catalysts in photo-induced CO2 reduction are still not comparable with those of inorganic semiconductors, which motivates us to further develop durable, low-cost, and high-performance MOF catalysts. In this project, we will investigate the introduction of Light-harvesting complexes (Ir, Re, Ru complexes and porphyrin units) into the ligands of Zr-based MOFs (UiO-66). UiO-66 exhibits photocatalytic activity because of its ability to act like a semiconductor. This strategy can not only effectively promote light harvesting but also facilitate the charge separation in the energy conversion process, rendering MOFs as excellent photosensitizers in the photocatalytic process. MOFs. The pores of the MOFs will also be loaded with precious metal nanoparticles, e.g. platinum (Pt), as a co-catalyst. Experimental studies will deliver fundamental understanding of the chemistry of the materials which will support development of improved technology. The experimental approach will build on our experience and expertise of design of catalysts with controlled composition, morphology and structure. Detailed catalyst characterisation, will provide essential information on catalyst structure and chemical properties. The catalytic results will feedback to the material synthesis in an iterative fashion to optimise and fine-tune the materials' properties for an efficient process. This project is in line with the UK's recently announced 'Clean growth' strategy and pave the way towards a carbon free future mobility. It is also in line with the EPSRC's theme of Physical sciences and the research area of 'Catalysis' which is in 'maintain' in EPSRC's portfolio.

植物已经进化为收获太阳能，并利用收获的能量通过光合作用将二氧化碳和水转化为碳水化合物。受到无机和有机材料进行类似光化学反应的自然光合作用，人工系统和设备的启发，已引起了相当大的关注，这是可再生能源产生的潜在手段，而无需依赖化石燃料，也没有二氧化碳发射。光催化水分裂形成氢和氧气，可以有效地转化为电源的电源，这些电池有可能为正在建造的电动汽车提供电力。此外，二氧化碳的光催化降低不仅消除了大气中的CO2，而且还提供了在现有的能源供应基础设施内存储，分发和利用的燃料，它是一种新的无机杂种材料家族，可以作为一种有趣的平台来设计和研究人工系统。 MOF原则上可以包含单个固体中的光敏剂和催化中心，并提供结构组织，以将人工光合作用的基本步骤整合到单个材料中。光诱导的二氧化碳减少量中MOF催化剂的光活性仍然与无机半导体的光活性相当，这激发了我们进一步发展耐用，低成本和高性能MOF催化剂。在这个项目中，我们将研究将光收获复合物（IR，RE，RU复合物和卟啉单元）引入基于ZR的MOF（UIO-66）的配体中。 UIO-66表现出光催化活性，因为它具有像半导体的能力。该策略不仅可以有效地促进光收集，而且可以促进能量转化过程中的电荷分离，从而使MOF成为光催化过程中出色的光敏剂。 MOF。 MOF的孔也将装有贵金属纳米颗粒，例如铂（PT），作为共催化剂。实验研究将对材料化学的基本了解，这将支持改进技术的发展。实验方法将基于我们具有控制成分，形态和结构的催化剂设计的经验和专业知识。详细的催化剂特征将提供有关催化剂结构和化学特性的重要信息。催化结果将以迭代方式反馈材料合成，以优化和微调材料的特性以进行有效的过程。该项目符合英国最近宣布的“清洁增长”策略，并为无碳的未来移动性铺平了道路。它也符合EPSRC的物理科学主题和EPSRC投资组合中“维护”的“催化”研究领域。