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Pt-表层限域的表面FeO_x结构用于低温CO氧化反应(英文)
  • ISSN号：0253-9837
  • 期刊名称：《催化学报》
  • 时间：0
  • 分类：O643.3[理学—物理化学;理学—化学]
  • 作者机构：中国科学院大连化学物理研究所催化基础国家重点实验室
  • 相关基金：supported by the National Natural Science Foundation of China (21222305, 11079005, 20923001);the National Basic Research Program of China (973 Program, 2013CB834603, 2011CBA00503, 2013CB933100)~~
作者： 徐红, 傅强, 包信和
关键词： 一氧化碳氧化, 铂-表层, 铁氧化物, 界面催化, CO oxidation, Pt-skin, Fe oxide, Interface catalysis
中文摘要：

通过简单的浸渍-还原并随后在酸性溶液中处理制备了Pt-Cu双金属催化剂.利用电感耦合等离子体发射光谱、X射线衍射和X射线光电子能谱对不同处理条件下的Pt-Cu纳米粒子的结构和组成进行了表征.研究发现,Pt-Cu催化剂在高温H2中还原形成了PtCu3合金结构,酸洗处理后形成了包含Pt-骨架(Pt-skeleton)的表面结构和PtCu3合金核的纳米粒子.而Pt-骨架结构又可通过在H2中退火转变为规整的Pt-表层(Pt-skin)结构.Pt-表层表面修饰Fe氧化物后在CO选择氧化反应中表现出较好的催化性能.通过此方法制备的三金属Pt-Cu-Fe催化剂可达到与Pt-Fe相近的高活性,并且催化剂中Pt的用量大大降低.

英文摘要：

Pt-Cu/carbon black catalysts were prepared by an impregnation-reduction method followed by acid leaching.The structure and composition of Pt-Cu nanoparticles treated under different conditions were investigated by inductively coupled plasma atomic emission spectrometry,X-ray diffraction,and X-ray photoelectron spectroscopy.PtCu3 alloy formed upon annealing Pt-Cu/carbon black cata- lysts in H2.Acid leaching produced Pt-Cu nanoparticles consisting of Pt-skeleton surface structure and PtCu3 alloy core. The Pt-skeleton could be transformed to well-defined Pt-skin structure through further annealing the leached Pt-Cu nanoparticles in H2.Decorating the Pt-skin surfaces with Fe oxide nanopatches resulted in enhanced reactivity in the preferential oxidation of CO in excess H2.The tri-component Pt-Cu-Fe catalysts exhibited comparable activity to the bi-component Pt-Fe catalysts but used much less Pt.

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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