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MoOx促进的Pt基催化剂用于低温水汽变换反应
  • ISSN号：0253-9837
  • 期刊名称：《催化学报》
  • 时间：0
  • 分类：O[理学]
  • 作者机构：[1]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,辽宁大连116023, [2]中国科学院大学,北京100049
  • 相关基金：国家自然科学基金（21222305,21321001,21103181）;国家重点基础研究发展计划（973计划,2013CB834603,2013CB933100.2011CBA00503）.
作者： 许学俊, 傅强[1], 包信和[1]
关键词： 水汽变换反应, 铂, 钼氧化物, 协同作用, 界面催化, Water gas shift reaction , Platinum , Molybdenum oxide , Synergistic effect, Interface catalysis
中文摘要：

通过浸渍还原法制备了不同比例的Pt-Mo/SiO2催化剂，采用X射线衍射、透射电镜、X射线近边吸收谱和X射线光电子能谱表征了Pt-Mo/SiO2催化剂的组成、结构及价态。研究结果表明，少量MoOx修饰Pt-Mo/SiO2催化剂在低温水汽变换反应中表现出比Pt/SiO2催化剂更高的催化活性，过量MoOx包覆的Pt-Mo/SiO2催化剂活性较低。低温水汽变换反应活性来自于Pt与表面MoOx的界面协同作用，限域在Pt纳米颗粒表面的MoOx表现出较低价态，高分散MoOx纳米岛修饰的Pt纳米颗粒是低温水汽变换反应的活性结构。

英文摘要：

Pt-Mo/SiO2 catalysts were prepared using impregnation-reduction methods. Mo-promoted Pt catalysts exhibit much higher water gas shift reaction activity at low temperatures than Pt/SiO2 catalysts. Various characterization methods including inductive coupled plasma atomic emission spectrometry, X-ray diffraction, transmission electron microscopy, X-ray absorption near edge spectrum, and X-ray photoelectron spectroscopy were applied to investigate the composition, structure and chemical state of the Pt-Mo/SiO2 catalysts. Our results indicate that the added Mo species effec- tively improves the dispersion of Pt nanoparticles and the synergistic effect between the Pt nanoparticles and surface MoOxspecies enhances the catalytic performance for the water gas shift reaction. Pt nanoparticles decorated with highly dispersed MoOx patches are found to be the active architecture.

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界面限域的Pt基双组分催化体系在低温水汽变换过程中的研究
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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