【摘 要】
：
The stoichiometric LaCoO3 and nonstoichiometric LaCo1.2O3 perovskite catalysts were prepared by citric acid sol-gel method,and then,LaCoO3 perovskite was etched
【机 构】
：
China Tobacco Zhejiang Industrial Co., Ltd, Hangzhou 310024,China;Research Institute Catalysis, Scho
论文部分内容阅读
The stoichiometric LaCoO3 and nonstoichiometric LaCo1.2O3 perovskite catalysts were prepared by citric acid sol-gel method,and then,LaCoO3 perovskite was etched with nitric acid.The structure,surface composition and reducibility of the catalyst were studied by X-ray diffraction (XRD),nitrogen desorption,transmission electron microscope (TEM),temperature program reduction of H2 (H2-TPR) and X-ray photoelectron spectroscopy (XPS).It was found that nitric acid etching did not change the crystal structure and the overall morphology of the LaCoO3 catalyst,but it can cause the exposure of B-site Co metal to the surface of the catalyst.As a result,after acid etching,the reducibility of the LaCoO3 catalyst was improved,leading to the improvement in the catalytic activity of the LaCoO3 catalyst for CO oxidation and C3H8 combustion.Moreover,the catalytic activity of the LaCoO3 catalyst after acid etching was higher than that of LaCo1.2O3 and CoOx/LaCoO3 catalyst.
其他文献
Sm-Co permanent magnets are widely used in aerospace equipments,tubes,sensors and hybrid electric vehicles due to their excellent magnetic properties at both ro
Flexible,lightweight and high conductivity substrates are required for the development of next-generation flexible Li-ion batteries (LIBs).In addition,the inter
4月10日,国际权威杂志《科学》发表了复旦大学生物医学研究院熊跃、管坤良教授所领导科研团队的研究成果——“神经胶质瘤衍生的IDH1突变显性抑制酶催化活性,激活HIF1”。
A
With the rising demand for fast-charging technology in electric vehicles and portable devices,significant efforts have been devoted to the development of the hi
In this work,nickel/T-Nb2O5 nanoparticles encapsulated in mesoporous carbon nanofibers (denoted as Ni/ T-Nb2O5@CNFs) are successfully prepared through a simple
A two-dimensional (2D) SnNb2O6/amino-functionalized graphene (En-RGO) nanocomposite with a representative 2D-2D architecture has been constructed by an easy sel
TiO2 nanotube arrays,growing on three-dimensional (3D) porous Ti membrane,were synthesized using a facile nonsolvent-induced phase separation and anodization pr
针对现阶段岩体循环加载下力学响应研究中的不足之处,以宜昌地区钙质中-细砂岩为研究对象和以RMT-150C岩土力学试验系统为试验平台,开展了毫秒(ms)量级三角波卸载段变形速率
随着教学改革的不断深入发展,培养学生的体育意识,发展学生的体育能力,已成为高职院校体育教学追求和探索的一个重要目标。结合女大学生的体育状况,提出体育意识的培养途径及
The volume of the metallic lithium anode in all-solid-state Li metal batteries increases significantly due to the lithium dendrite formation during the battery