光催化
背景(考古学)
催化作用
气相
相(物质)
化学反应
材料科学
化学
纳米技术
有机化学
古生物学
生物
作者
Murielle Schreck,Markus Niederberger
标识
DOI:10.1021/acs.chemmater.8b04444
摘要
Photocatalytic gas phase reactions represent a less explored yet promising direction within the highly active research area of photocatalysis. While photocatalytic liquid phase reactions are typically performed in water, photocatalytic gas phase reactions focus on gaseous and vaporized compounds. With this change in reaction environment, it is possible to address completely new questions and topics. Examples lie in the field of solar fuels, air pollution, global warming, and green chemistry. For this review, we selected five photocatalytic gas phase reactions, namely the reduction of CO2, water splitting, the oxidation of volatile organic compounds, the degradation of nitrogen oxides, and the synthesis of ammonia, which we discuss in the context of why they are important from a scientific, technological, and also societal point of view. We present the chemical mechanisms behind these photocatalytic processes and propose ideas and strategies for how these processes can be made more efficient. Our literature survey results in a list of 11 points regarding how the selectivity and yield of photocatalytic gas phase reactions can be increased by optimizing the composition of the photocatalysts, their surface chemistry, and experimental parameters such as temperature, gas flow, and gas composition.
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