Seed-mediated synthesis of dendritic platinum nanostructures with high catalytic activity for aqueous-phase hydrogenation of acetophenone

查看全文 作　　者：Yuan [1,2]Yuan;Yusuf Valentino [3]Kaneti;Minsu [4]Liu;Fangzhu [2]Jin;Danielle Frances [5]Kennedy;Xuchuan [4]Jiang;Jun [2]Huang;Aibing [3,4]Yu

机构地区：[1]School of Chemistry, University of New South Wales;[2]School of Chemical and Biomolecular Engineering, The University of Sydney;[3]School of Materials Science and Engineering, University of New South Wales;[4]Department of Chemical Engineering, Monash University;[5]Rapid Automated Materials and Processing Centre, CSIRO Manufacturing Flagship

出　　处：《Journal of Energy Chemistry》索引2015年第24卷第5期,共9页

基　　金：the financial support of the Australian Research Council (ARC) projects;USyd Early Career Researcher Scheme;Major Equipment Scheme;the scholarships provided by China Scholarship Council (CSC);the Commonwealth Scientific and Industrial Research Organization (CSIRO) OCE Top-up Scholarship 摘　　要：This work reports a facile and efficient seed-mediated method for the synthesis of dendritic platinum(Pt)nanoparticles(NPs) at low temperatures of 55–60 °C in water, using L-ascorbic acid as a reducing agent and sodium citrate as a capping agent. It is found that the dendritic Pt NPs(10–150 nm) are composed of tiny Pt nanocrystals, which nucleate and grow through the introduced smaller Pt seeds with diameters of 3–5 nm.Further investigation shows that the dendritic Pt nanostructures display excellent catalytic performance in an aqueous-phase aromatic ketone hydrogenation reaction, including:(i) acetophenone conversion rate of> 90%, with smaller dendritic Pt NPs(10–46 nm) offering a higher conversion efficiency;(ii) high chemoselectivity toward carbonyl group(90.6%–91.5%), e.g., the selectivity to 1-phenylethanol is ~90.1% with nearly100% acetophenone conversion for 10 nm dendritic Pt NPs within 60 min, under mild reaction conditions(20 °C, 1.5 bar H2 pressure, and 1.5 mol% catalyst). The high catalytic activity, selectivity and stability of the dendritic Pt nanostructures under the organic solvent-free conditions make them promising for many potential applications in green catalytic conversion of hydrophilic biomass derived compounds. 关键词：纳米结构水相合成催化活性加氢反应苯乙酮树突种子介导

相关文献

参考文献（32）
引证文献（3）
耦合文献（0）

参考文献(32)

引证文献(3)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Seed-mediated synthesis of dendritic platinum nanostructures with high catalytic activity for aqueous-phase hydrogenation of acetophenone

参考文献(32)

引证文献(3)

用户提示