文献类型：期刊文章

作　　者：李伟作[1] 赵忠奎[1] 焦艳华[2] 王桂茹[1]

机构地区：[1]大连理工大学化工与环境生命学部精细化工国家重点实验室,辽宁大连116024 [2]杭州师范大学材料化学与化工学院,浙江杭州310036

出　　处：《Chinese Journal of Catalysis》

基　　金：financially supported by the Joint Fund of Coal, set up by National Natural Science Foundation of China and Shenhua Co., Ltd.(U1261104);the National Natural Science Foundation of China (21276041);the Program for New Century Excellent Talents in University (NCET-12-0079);the Natural Science Foundation of Liaoning Province (2015020200);the Fundamental Research Funds for the Central Universities (DUT15LK41);the Science and Technology Development Program of Hangzhou (20130533B14)~~

年　　份：2016

卷　　号：37

期　　号：12

起止页码：2122-2133

语　　种：中文

收录情况：AJ、BDHX、BDHX2014、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EI(收录号：20170203242133)、JST、RSC、SCI-EXPANDED(收录号：WOS:000391777500010)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：An immature pinecone shaped hierarchically structured zirconia （ZrO2-ipch） and a cobblestone-like zirconia nanoparticulate （ZrO2-cs）, both with the monoclinic phase （m-phase）, were synthesized by the facile hydrothermal method and used as the support for a Ni catalyst for the dry reforming of methane （DRM） with CO2. ZrO2-ipch is a much better support than ZrO2-cs and the traditional ZrO2 irregular particles made by a simple precipitation method （ZrO2-ip）. The supported Ni catalyst on ZrO2-ipch （Ni/ZrO2-ipch） exhibited outstanding catalytic activity and coke-resistant stability compared to the ones on ZrO2-cs （Ni/ZrO2-cs） and ZrO2-ip （Ni/ZrO2-ip）. Ni/ZrO2-ip exhibited the worst catalytic performance. The origin of the significantly enhanced catalytic performance was revealed by characterization including XRD, N2 adsorption measurement （BET）, TEM, H2-TPR, CO chemisorption, CO2-TPD, XPS and TGA. The superior catalytic activity of Ni/ZrO2-ipch to Ni/ZrO2-cs or Ni/ZrO2-ip was ascribed to a higher Ni dispersion, increased reducibility, enhanced oxygen mo- bility, and more basic sites with a higher strength, which were due to the unique hierarchically structural morphology of the ZrO2-ipch support. Ni/ZrO2-ipch exhibited better stability for the DRM reaction than Ni/ZrO2-ip, which was ascribed to its higher resistance to Ni sintering due to a strengthened metal-support interaction and the confinement effect of the mesopores and coke deposition resistance. The higher coking resistance of Ni/ZrO2-ipch for the DRM reaction in comparison with Ni/ZrOz-ip orignated from the coke-removalabitity of the higher amount of lattice oxygen and more basic sites, confirmed by XPS and CO2-TPD analysis, and the stabilized Ni on the Ni/ZrO2-ipch catalyst by the confinement effect of the mesopores of the hierarchical ZrO2-ipch sup- port. The superior catalytic performance and coking resistance of the Ni/ZrO2-ipch catalyst makes it a promising candidate for synthesis gas production from the DRM reaction.

关 键 词：Ni-based catalystZrO2 supportHierarchical structure Morphology effect Dry reforming of methane Synthesis gas Coke resistance  

分 类 号：O643.36]