分散在(Ga_(1-x)Zn_x)(N_(1-x)O_x)载体上的Rh纳米颗粒尺寸对光催化氧化反应的作用(英文)  

Size dependence of photocatalytic oxidation reactions of Rh nanoparticles dispersed on(Ga_(1-x)Zn_x)(N_(1-x)O_x) support

作　　者：Yi Zhang D.A.J.Michel Ligthart Peng Liu Lu Gao Tiny M.W.G.M.Verhoeven Emiel J.M.Hensen 

机构地区：[1]Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O.Box 513,5600 MB, Eindhoven, The Netherlands

出　　处：《催化学报》2014年第12期1944-1954,共11页

基　　金：the financial support by the Royal Netherlands Academy of Sciences and Arts and the Chinese Ministry of Science and Technology as part of the Program Strategic Scientific Alliances (PSA);supported by ESRF

摘　　要：Mixed Ga–Zn oxynitrides were synthesized using coprecipitation, wet-precipitation, and sol-id-solution methods. The oxynitrides were used as supports for Rh nanoparticle catalysts in photo-catalytic water splitting, CO oxidation, and H2 oxidation. Mixed Ga–Zn oxynitrides produced by wet precipitation and nitridation had good visible-light-absorption properties and high surface areas, so they were used to support uniformly sized poly(vinylpyrrolidone)-stabilized Rh nanoparticles. The nanoparticle size range was 2–9 nm. These catalysts had negligible activity in photocatalytic H2 production by water splitting with methanol as a sacrificial agent. Other mixed Ga–Zn oxynitrides were also inactive. A reference sample provided by Domen also showed very low activity. The in-fluence of particle size on Rh-catalyzed oxidation of CO and H2 was investigated. For CO oxidation, the activities of small particles were higher for particles with higher Rh oxidation degrees. The op-posite holds for H2 oxidation.Mixed Ga-Zn oxynitrides were synthesized using coprecipitation, wet‐precipitation, and sol‐id‐solution methods. The oxynitrides were used as supports for Rh nanoparticle catalysts in photo‐catalytic water splitting, CO oxidation, and H2 oxidation. Mixed Ga-Zn oxynitrides produced by wet precipitation and nitridation had good visible‐light‐absorption properties and high surface areas, so they were used to support uniformly sized poly（vinylpyrrolidone）‐stabilized Rh nanoparticles. The nanoparticle size range was 2-9 nm. These catalysts had negligible activity in photocatalytic H2 production by water splitting with methanol as a sacrificial agent. Other mixed Ga-Zn oxynitrides were also inactive. A reference sample provided by Domen also showed very low activity. The in‐fluence of particle size on Rh‐catalyzed oxidation of CO and H2 was investigated. For CO oxidation, the activities of small particles were higher for particles with higher Rh oxidation degrees. The op‐posite holds for H2 oxidation.

关 键 词：光催化氧化反应 纳米粒子 乙烯基吡咯烷酮 纳米催化剂 氧氮化物 分散 尺寸 CO氧化 

分 类 号：O643.32[理学—物理化学]