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 |
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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. |
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