SusChEM: Water Splitting Photocatalysis with Doped Metal Oxide Nanocrystals

SusChEM：掺杂金属氧化物纳米晶体的水分解光催化

• 批准号: 1464938
• 负责人: Frank Osterloh
• 金额: $ 36万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1464938&HistoricalAwards=false
• 关键词: SusChEM; Water; Splitting; Photocatalysis; Doped

Water Splitting Photocatalysis with Doped Metal Oxide NanocrystalsIn this Chemical Catalysis project, Frank Osterloh of the University of California at Davis is developing catalysts that can convert water into hydrogen and oxygen using sunlight. This technology creates a carbon-free pathway to hydrogen fuel using only sunlight as a renewable energy source. The catalysts incorporate components for light absorption, electric charge separation, and water conversion. They are synthesized from inexpensive components and they are studied with a range of techniques. This work provides new insight into how sunlight interacts with small particles and how photochemical energy is converted into fuel. The project has significant societal broader impact through contributions to clean energy technology. Dr. Osterloh also has created training opportunities for graduate and undergraduate students in inorganic chemistry and solar energy conversion. He is active in outreach activities that present chemical demonstrations to the community and to underrepresented student groups, and develops online materials, which are made available to educate the public about the need for sustainable energy.The Chemical Catalysis program supports Frank Osterloh at the University of California at Davis to develop microheterogeneous photocatalyst systems that can electrolyze water under sunlight illumination without any applied external bias. The catalysts incorporate components for light absorption, charge separation, water oxidation and water reduction. They are synthesized from abundant elements using a combination of scalable chemical reactions and chemical assembly and are characterized with microscopic, optical and electrical techniques. Their water splitting function is established through irradiation tests and electrochemistry, and their charge separation properties are quantified with surface photovoltage spectroscopy. This project provides new insights into photochemical charge generation and water photoelectrolysis with doped titania-based metal oxides. New quantitative relationships between the photocatalytic properties of the materials and their particle size and surface composition are also developed, with special consideration of the particle energetics and kinetics, and the electrolyte environment. Furthermore, the project has broader impacts by providing hands-on training to graduate and undergraduate students in the synthesis, handling, and understanding of nanoscale inorganic materials and their characterization with photophysical techniques and electrochemistry. Professor Osterloh also develops new course content, laboratory experiments, chemical demonstrations, and online materials, with an emphasis of recruiting the next generation of STEM students, including underrepresented minorities, for renewable energy research.

掺杂金属氧化物纳米晶体的水分解光催化在这个化学催化项目中，加州大学戴维斯分校的 Frank Osterloh 正在开发可以利用阳光将水转化为氢气和氧气的催化剂。该技术仅使用阳光作为可再生能源，创造了一条无碳的氢燃料途径。 该催化剂包含用于光吸收、电荷分离和水转化的成分。它们是由廉价的成分合成的，并通过一系列技术进行研究。这项工作为太阳光如何与小粒子相互作用以及光化学能如何转化为燃料提供了新的见解。 该项目通过对清洁能源技术的贡献而产生了重大的社会影响。奥斯特洛博士还为研究生和本科生创造了无机化学和太阳能转换方面的培训机会。 他积极参与外展活动，向社区和代表性不足的学生团体展示化学演示，并开发在线材料，以教育公众了解可持续能源的需求。化学催化项目支持加州大学戴维斯分校的 Frank Osterloh 开发微异质光催化剂系统，该系统可以在阳光照射下电解水，而无需施加任何外部偏压。该催化剂包含用于光吸收、电荷分离、水氧化和水还原的成分。它们是通过可扩展的化学反应和化学组装的组合由丰富的元素合成的，并通过微观、光学和电学技术进行表征。它们的水分解功能是通过辐照测试和电化学建立的，它们的电荷分离特性通过表面光电压光谱进行量化。该项目为光化学电荷产生和掺杂二氧化钛基金属氧化物的水光电解提供了新的见解。还开发了材料的光催化性能与其粒径和表面组成之间的新定量关系，特别考虑了颗粒能量学和动力学以及电解质环境。此外，该项目通过为研究生和本科生提供合成、处理和理解纳米级无机材料及其利用光物理技术和电化学表征的实践培训，产生了更广泛的影响。 Osterloh 教授还开发了新的课程内容、实验室实验、化学演示和在线材料，重点是招募下一代 STEM 学生（包括代表性不足的少数族裔）进行可再生能源研究。