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首页> 外文期刊>Plasma Science & Technology >Atmospheric-Pressure DBD Cold Plasma for Preparation of High Active Au/P25 Catalysts for Low-Temperature CO Oxidation
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Atmospheric-Pressure DBD Cold Plasma for Preparation of High Active Au/P25 Catalysts for Low-Temperature CO Oxidation

机译：常压DBD冷等离子体制备用于低温CO氧化的高活性Au / P25催化剂

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摘要

Cold plasma generated by dielectric barrier discharge (DBD) at atmospheric pressure was adopted for preparation of commercial TiO2 Degussa P25 supported Au catalysts (Au/P25-P) with the assistance of the deposition-precipitation procedure. The influences of the plasma reduction time and calcination on the performance of the Au/P25-P catalysts were investigated. CO oxidation was performed to investigate the catalytic activity of the Au/P25 catalysts. The results show that DBD cold plasma for the fabrication of Au/P25-P catalysts is a fast process, and Au/P25-P (4 min) exhibited the highest CO oxidation activity due to the complete reduction of Au compounds and less consumption of oxygen vacancies. In order to form more oxygen vacancies active species, Au/P25-P was calcined to obtain Au/P25-PC catalysts. Interestingly, Au/P25-PC exhibited the highest activity for CO oxidation among the Au/P25 samples. The results of transmission electron microscopy (TEM) indicated that the smaller size and high distribution of Au nanoparticles are the mean reasons for a high performance of Au/P25-PC. Atmospheric pressure DBD cold plasma was proved to be of great efficiency in preparing high performance supported Au catalysts.
机译：在沉积-沉淀程序的辅助下，采用在大气压下由电介质阻挡放电（DBD）产生的冷等离子体制备市售TiO2 Degussa P25负载的Au催化剂（Au / P25-P）。研究了等离子体还原时间和煅烧对Au / P25-P催化剂性能的影响。进行CO氧化以研究Au / P25催化剂的催化活性。结果表明，用于制造Au / P25-P催化剂的DBD冷等离子体是一个快速的过程，并且Au / P25-P（4分钟）由于完全还原了Au化合物并且消耗了较少的Au而表现出最高的CO氧化活性。氧空位。为了形成更多的氧空位活性物质，将Au / P25-P煅烧以获得Au / P25-PC催化剂。有趣的是，Au / P25-PC在Au / P25样品中表现出最高的CO氧化活性。透射电子显微镜（TEM）的结果表明，Au纳米粒子的较小尺寸和高分布是Au / P25-PC高性能的原因。大气压DBD冷等离子体被证明在制备高性能负载型Au催化剂方面具有很高的效率。

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