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学科主题: 物理化学
题名: Charge separation and transfer in photocatalytic hydrogen production
作者: Li C(李灿)
会议文集: International Symposium on Surface Science-towards nano-,bio-,and green innovation-
会议名称: The 6th International Symposium on Surface Science
会议日期: 2011-12-11
出版日期: 2011
会议地点: 东京
通讯作者: 李灿
出版者: 待补充
出版地: 待补充
合作性质: 分会特邀报告
部门归属: 503
主办者: 日本表面科学会
摘要: Solar energy is the primary source for clean and renewable energy alternative. The concerns about the depletion of fossil fuel reserves and the pollution caused by continuously increasing energy demands make solar fuels an attractive energy source. This lecture discusses the key issues concerning the photocatalytic materials designating and preparation for the production of solar fuels, mainly photocatalytic hydrogen production utilizing solar energy, focusing on the fundamental understanding of phtotcatalysis and photochemical reactions on semiconductor-based photocatalysts. Semiconductor-based nano materials are believed to be the most promising components for photocatalysts, so the discovery and preparation of novel semiconductor materials are crucial for the development of advanced photocatalysts. To convert solar energy efficiently to chemical energy , much attention has been paid to reducing charge recombination and improving solar energy conversion efficiency. Our recent results demonstrate that the formation of surface phase junction and hetero-junction on semiconductor catalysts can significantly promote the charge separation and transfer and result the great activity enhancement in photocatalytic hydrogen production. By mimicking the photosynthesis, loading spatially avoid the charge recombination and consequently increase the photocatalytic activity. A recent progress made in photocatalytic hydrogen production shows that a quantum yield up to 93% can be achieved for Pt-PdS/CdS catalysts where the dual co-catalysts, Pt and PdS nanoparticles act as reduction and oxidation co-catalysts respectively. The finely designing and preparation of junctions at atomic and nano-scale together with spatially separated right co-catalysts are the strategy to develop highly active photocatalysts for solar fuel production.
英文摘要: Solar energy is the primary source for clean and renewable energy alternative. The concerns about the depletion of fossil fuel reserves and the pollution caused by continuously increasing energy demands make solar fuels an attractive energy source. This lecture discusses the key issues concerning the photocatalytic materials designating and preparation for the production of solar fuels, mainly photocatalytic hydrogen production utilizing solar energy, focusing on the fundamental understanding of phtotcatalysis and photochemical reactions on semiconductor-based photocatalysts. Semiconductor-based nano materials are believed to be the most promising components for photocatalysts, so the discovery and preparation of novel semiconductor materials are crucial for the development of advanced photocatalysts. To convert solar energy efficiently to chemical energy , much attention has been paid to reducing charge recombination and improving solar energy conversion efficiency. Our recent results demonstrate that the formation of surface phase junction and hetero-junction on semiconductor catalysts can significantly promote the charge separation and transfer and result the great activity enhancement in photocatalytic hydrogen production. By mimicking the photosynthesis, loading spatially avoid the charge recombination and consequently increase the photocatalytic activity. A recent progress made in photocatalytic hydrogen production shows that a quantum yield up to 93% can be achieved for Pt-PdS/CdS catalysts where the dual co-catalysts, Pt and PdS nanoparticles act as reduction and oxidation co-catalysts respectively. The finely designing and preparation of junctions at atomic and nano-scale together with spatially separated right co-catalysts are the strategy to develop highly active photocatalysts for solar fuel production.
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/116129
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Li C. Charge separation and transfer in photocatalytic hydrogen production[C]. 见:The 6th International Symposium on Surface Science. 东京. 2011-12-11.
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