Molecular hybrid photocatalysts for selective solar H2 and material generation from real life wastes

用于选择性太阳能氢气和现实生活废物材料生产的分子混合光催化剂

• 批准号: EP/X023370/1
• 负责人: Sayan Kar
• 金额: $ 24.26万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX023370%2F1
• 关键词: Molecular; hybrid; photocatalysts; selective; solar

Solar waste photoreforming is a process that generates valuable H2 fuel and chemicals from discarded waste and water using abundant sunlight, providing solutions to many global challenges including waste management, clean fuel generation, and material production. Despite the potential, current state-of-the-art photoreforming processes suffer from major deficiencies including the use of highly basic medium and nonselective product generation that preclude their large-scale implementation. The "Waste2Fuel" proposal seeks to address these deficiencies by employing hybrid photocatalysts, with molecular oxidation catalysts anchored onto photocatalyst surfaces, to carry out selective waste photoreforming under benign conditions. Inspiration to such an approach comes from the recent success in selective CO2 photoreduction with similar hybrid strategy. Among different objectives, molecular catalysts will be first immobilized onto anodes by covalent bond, and conditions will be optimized to obtain selective electrochemical waste oxidation under aqueous conditions by surface-bound catalysts. The molecular catalysts will then be grafted onto photocatalysts to get hybrid photoanodes, which will be subsequently employed for selective solar waste photoreforming. We surmise that during photoreforming, initial hole transfer from photocatalyst to the anchored molecular catalyst will take place, with the latter oxidizing waste substrates in turn, giving high efficiency and product selectivity as is generally observed with molecular complexes. Our final objective is to develop a scalable 10.10 cm2 panel with surface deposited hybrid catalyst for large-scale solar photoreforming, demonstrating its applicability. Successful completion of the research would enable commercialization of the waste photoreforming process, contributing towards the sustainable production of fuel and materials, while at the same time, recycling the generating wastes of our society.

太阳能废物光转化是一种利用充足的阳光从废弃的废物和水中产生有价值的H2燃料和化学品的过程，为许多全球挑战提供解决方案，包括废物管理，清洁燃料生产和材料生产。尽管有潜力，但目前最先进的光重整方法存在主要缺陷，包括使用高碱性介质和非选择性产物产生，这妨碍了它们的大规模实施。“1002Fuel”提案试图通过采用混合光催化剂来解决这些缺陷，其中分子氧化催化剂锚定在光催化剂表面上，以在良性条件下进行选择性废物光重整。这种方法的灵感来自于最近成功的选择性CO2光还原与类似的混合策略。在不同的目标中，首先将分子催化剂通过共价键固定在阳极上，并优化条件以获得在水性条件下通过表面结合的催化剂的选择性电化学废物氧化。然后将分子催化剂接枝到光催化剂上以获得混合光阳极，其随后将用于选择性太阳能废物光重整。我们推测，在光重整过程中，将发生从光催化剂到锚定的分子催化剂的初始空穴转移，后者依次氧化废底物，提供高效率和产物选择性，如通常用分子络合物观察到的。我们的最终目标是开发一个可扩展的10.10平方厘米的面板与表面沉积的混合催化剂的大规模太阳能光重整，证明其适用性。研究的成功完成将使废物光转化过程商业化，为燃料和材料的可持续生产做出贡献，同时回收我们社会产生的废物。

项目成果

Integrated capture and solar-driven utilization of CO2 from flue gas and air

• DOI: 10.1016/j.joule.2023.05.022
• 发表时间: 2023-07-19
• 期刊: JOULE
• 影响因子: 39.8
• 作者: Kar, Sayan;Rahaman, Motiar;Reisner, Erwin
• 通讯作者: Reisner, Erwin