孟根图雅,杨桂萍,贾美林,崔文静.高比表面介孔LaNiO3负载纳米Au催化剂的研究[J].分子催化,2018,32(5):454-460
高比表面介孔LaNiO3负载纳米Au催化剂的研究
Catalytic Performance of Nano Au Catalyst Supported on Mesoporous LaNiO3 with High Surface Area
投稿时间:2018-06-25  修订日期:2018-08-18
DOI:
中文关键词:  纳米铸型法  钙钛矿  Au/N-LaNiO3催化剂  CO催化氧化
英文关键词:nanocasting method  perovskite  Au/LaNiO3 catalyst  CO catalytic oxidation
基金项目:内蒙古自治区高等学校科学研究项目NJZY18281
作者单位E-mail
孟根图雅 内蒙古化工职业学院 化学工程系, 内蒙古 呼和浩特 010010  
杨桂萍 内蒙古师范大学 化学与环境科学学院, 内蒙古绿色催化重点实验室, 内蒙古 呼和浩特 010010  
贾美林 内蒙古师范大学 化学与环境科学学院, 内蒙古绿色催化重点实验室, 内蒙古 呼和浩特 010010 jml@imnu.edu.cn 
崔文静 内蒙古化工职业学院 化学工程系, 内蒙古 呼和浩特 010010  
摘要点击次数: 1578
全文下载次数: 1451
中文摘要:
      分别采用纳米铸型法和溶胶-凝胶法制备了系列LaNiO3载体,并用沉积-沉淀法制备了系列Au/LaNiO3催化剂.对催化剂进行了XRD、BET、AAS、TEM和XPS等表征,测试了其对CO催化氧化活性.实验结果表明,纳米铸型法得到的LaNiO3-NCM具有介孔结构,且比表面积可达126 m2·g-1,以其为载体制备的Au/LaNiO3-NCM催化剂在30℃条件下将CO完全转化,活性远高于以传统溶胶-凝胶法制备的LaNiO3-SG为载体的金催化剂.XPS结果表明该Au/LaNiO3-NCM催化剂表面存在较多的氧化态Auδ+(0 < δ < 3)和晶格氧,且活性组分Au含量也较高,说明高比表面介孔LaNiO3载体有利于提高活性组分Au的负载量,从而提高催化剂催化活性.
英文摘要:
      A series of LaNiO3 supports were prepared by nanocasting and sol-gel method respectively. Au/LaNiO3 catalysts prepared by deposition-precipitation method were characterized by XRD、BET、AAS、TEM and XPS. The catalytic performance for CO oxidation was investigated. The Au/N-LaNiO3 catalyst derived from the nanocasting method showed high activity for CO oxidation, with complete transformation of CO at 30℃. The characterization results demonstrated that LaNiO3-NCM support with mesoporous structure from nanocasting method exhibited specific surface area as high as 126 m2·g-1. The XPS results implied that the content of oxidized Auδ+(O < δ < 3, or Au+), lattice oxygen as well as active species Au was high on the surface of the Au/LaNiO3-NCM catalyst. This result demonstrated that the mesoporous LaNiO3 support with high surface area was beneficial for increasing the loading of Au, thus improved the catalytic activity of the catalyst.
HTML  查看全文  查看/发表评论  下载PDF阅读器