ARTIFICIAL PHOTOSYNTHESIS USING PHOTOCATALYTIC MULTINUCLEAR TRANSITION METAL SIT

使用光催化多核过渡金属 SIT 进行人工光合成

• 批准号: 8362128
• 负责人: Heinz Frei
• 金额: $ 1.04万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-03-01 至 2012-02-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8362128
• 关键词: Area; Carbon Dioxide; Catalytic Domain; Charge; Coupling; Environment; Evolution; Funding; Goals; Grant; Link; Metals; National Center for Research Resources; Optics; Oxidation-Reduction; Oxygen; Photosynthesis; Principal Investigator; Radiation; Reaction; Research; Research Infrastructure; Resources; Silicon Dioxide; Site; Source; Spectrum Analysis; Structure; Surface; Transition Elements; United States National Institutes of Health; Visible Radiation; Water; catalyst; chromophore; cost; oxidation; scaffold; structural biology

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Visible light-absorbing polynuclear charge-transfer sites anchored on the pore surface of high surface area mesoporous silica afford splitting of carbon dioxide to CO. Polynuclear water oxidation catalysts can be covalently linked to metal centers embedded in the silica pore surface for oxygen evolution under visible light. Evidence for covalent anchoring on the silica surface and connection of the metal centers through an O bridge was obtained by FT-infrared, FT-Raman and optical spectroscopy. In order to reach our long term goal of coupling the photocatalytic components of the half reactions to build integrated units in these nanoporous scaffolds that reduced CO2 by H2O under visible light, a more detailed structural understanding of the redox sites is essential. Therefore, XAS studies are proposed with the goal of elucidating the coordination environment of the metal centers of the binuclear charge-transfer chromophores, and the precise structure of the linkage between the donor metal center and the catalytic core of the water oxidation catalyst.

该副本是利用资源的众多研究子项目之一 由NIH/NCRR资助的中心赠款提供。对该子弹的主要支持 而且，副投影的主要研究员可能是其他来源提供的 包括其他NIH来源。 列出的总费用可能 代表subproject使用的中心基础架构的估计量， NCRR赠款不直接向子弹或副本人员提供的直接资金。 可见的吸收光核电荷转移位点锚定在高表面积介孔二氧化硅的孔表面上，可将二氧化碳分裂为Co。多核水氧化催化剂可以将嵌入在可见光的氧气表面中的金属中心共价链接到金属中心。通过FT-Infrared，FT-Raman和光谱法获得了在二氧化硅表面上共价锚定在二氧化硅表面和金属中心连接的证据。为了达到我们的长期目标，即在一半反应的光催化成分耦合，以在这些纳米孔支架中构建集成单元，这些单元在可见光下降低了H2O的CO2，对氧化还原位点的结构了解更为详细。因此，提出了XAS研究，目的是阐明双核电荷转移发色团的金属中心的配位环境，以及供体金属中心与水氧化催化剂的催化核心之间联系的精确结构。