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分散度对负载型铂基催化剂CO氧化性能的影响(英文)
  • ISSN号：0253-9837
  • 期刊名称：催化学报
  • 时间：2012.12.12
  • 页码：1901-1905
  • 分类：O643[理学—物理化学;理学—化学]
  • 作者机构：[1]厦门大学化学化工学院,固体表面物理化学国家重点实验室,醇醚酯化工清洁生产国家工程实验室,福建厦门361005
  • 相关基金：国家重点基础研究发展计划（973计划,2010cB732303）;教育部科学技术研究重大研究计划（309019）;国家自然科学基金（20873109,21033006,21073149,20923004）;教育部长江学者和创新团队发展计划（IRT1036）.
  • 相关项目：CO临氢催化活化转化的模型催化研究
作者： 陈省能|陈君宇|赵越|陈明树|万惠霖|
关键词： 铂, 氧化铈, 氧化硅, 氧化铝, 分散度, 一氧化碳, 氧化, platinum, ceria, silica, alumina, dispersion, carbon monoxide, oxidation
中文摘要：

以氧化铈、氧化硅和氧化铝为载体,采用浸渍法制备了一系列不同负载量的Pt基催化剂,并利用透射电子显微镜、X射线粉末衍射和X射线光电子能谱等技术对催化剂进行了表征.结果表明,对于Pt/CeO2催化剂,随着负载量减小,Pt的分散度提高;对于相同负载量的Pt基催化剂,各催化剂上Pt分散情况为：Pt/SiO2

英文摘要：

A series of ceria, silica, and γ-alumina-supported platinum catalysts were prepared by the incipient-wetness impregnation method. Transmission electron microscopy （TEM）, X-ray powder diffraction （XRD）,and X-ray photoelectron spectroscopy （XPS） were used to determine the dispersion of Pt. For the Pt/CeO2 catalysts, XRD studies suggest that Pt was better dispersed as its concentration decreased. This observation correlated well with XPS analysis. For catalysts with the same Pt mass loading, TEM and XRD results suggest that Pt dispersion displays an increasing order as Pt/SiO2 Pt/γ-Al2O3 Pt/CeO2. Catalytic activities for CO oxidation were investigated. Results showed that the 0.25 wt% Pt/CeO2 exhibited a higher activity than other oxide supported catalysts with a turnover frequency of 2.2 × 10-3 CO2 per total Pt per second at room temperature.

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期刊信息
  • 《催化学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国化学会 中国科学院大连化学物理研究所
  • 主编：李灿 张涛
  • 地址：大连市沙河口区中山路457号
  • 邮编：116023
  • 邮箱：chxb@dicp.ac.cn
  • 电话：0411-84379240
  • 国际标准刊号：ISSN：0253-9837
  • 国内统一刊号：ISSN：21-1195/O6
  • 邮发代号:8-93
  • 获奖情况:
  • 第三届国家期刊奖提名奖,中国科协精品科技期刊示范项目
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,美国科学引文索引（扩展库）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,英国英国皇家化学学会文摘,中国北大核心期刊（2000版）
  • 被引量:19199