摘要
The reduced graphene oxide （rGO） supported cobalt oxide nanocatalysts were prepared by the conventional precipitationand hydrothermal method. The as-prepared rGO-Co3O4 was characterized by the XRD, Raman spectrum, SEM, TEM, N2-sorption,UV-Vis, XPS and H2-TPR measurements. The results show that the spinel cobalt oxide nanoparticles are highly fragmented on therGO support and possess uniform particle size, and the as-prepared catalysts possess high specific surface area and narrow pore sizedistribution. The catalytic properties of the as-prepared rGO-Co3O4 catalysts for CO oxidation were evaluated through acontinuous-flow fixed-bed microreactor-gas chromatograph system. The catalyst with 30% （mass fraction） reduced graphene oxideexhibits the highest activity for CO complete oxidation at 100 ℃.
采用沉淀和水热合成方法制备还原氧化石墨烯负载氧化钴纳米催化剂。采用XRD、Raman光源、SEM、TEM、氮气吸附、UV-Vis、XPS和H2-TPR等测试手段对所合成的催化剂进行表征。结果表明:颗粒尺寸均一的钴氧化物纳米颗粒均匀地分散在还原氧化石墨烯表面,所合成的材料具有较大的比表面积和均一的孔径分布。采用连续流动固定床微反-色谱装置对所合成的杂化催化剂对一氧化碳氧化的催化性能进行研究后发现,含还原氧化石墨烯质量分数为30%的催化剂具有最高的催化活性,能实现一氧化碳在100°C时的完全氧化。
基金
Projects(51404097,51504083,21404033)supported by the National Natural Science Foundation of China
Project(2016M592290)supported by China Postdoctoral Science Foundation
Project(NSFRF1606)supported by the Fundamental Research Funds for the Universities of Henan Province,China
Projects(J2016-2,J2017-3)supported by Foundation for Distinguished Young Scientists of Henan Polytechnic University,China
Project(16A150009)supported by the Key Scientific Research Project for Higher Education of Henan Province,China
Project(166115)supported by the Postdoctoral Science Foundation of Henan Province,China
Project(17HASTIT029)supported by Program for Science&Technology Innovation Talents in Universities of Henan Province,China
Projects(162300410113,162300410119)supported by Natural Science Foundation of Henan Province of China
