催化学报

催化学报 ›› 2016, Vol. 37 ›› Issue (10): 1651-1655.DOI: 10.1016/S1872-2067(16)62521-4

• 快讯 • 上一篇    下一篇

负载金催化剂上CO氧化反应活性与金属氧化物载体中金属-氧结合能之间的关系

Takashi Fujita, Masanori Horikawa, Takashi Takei, Toru Murayama, Masatake Haruta   

  1. 首都大学东京, 城市环境科学研究生院, 应用化学系, 东京192-0397, 日本
  • 收稿日期:2016-05-20 修回日期:2016-08-04 出版日期:2016-10-21 发布日期:2016-10-22
  • 通讯作者: Masatake Haruta

Correlation between catalytic activity of supported gold catalysts for carbon monoxide oxidation and metal-oxygen binding energy of the support metal oxides

Takashi Fujita, Masanori Horikawa, Takashi Takei, Toru Murayama, Masatake Haruta   

  1. Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
  • Received:2016-05-20 Revised:2016-08-04 Online:2016-10-21 Published:2016-10-22
  • Contact: Masatake Haruta

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1366

被引次数

3

摘要：

讨论了金属氧化物载体（MOx）对其负载纳米金催化剂（Au/MOx）上CO氧化反应的影响.采用典型的共沉淀法和沉积-沉淀法在完全相同的焙烧条件下制备了一系列MOx负载金催化剂，以CO氧化转化50%时的反应温度（T1/2）定量评价了MOx载体和Au/MOx催化剂的催化活性.进一步将MOx载体与相应Au/MOx催化剂的T1/2值之差对MOx载体的金属-氧结合能做曲线进行关联，发现二者呈明显的火山型关系.这一结果表明，采用具有适当金属-氧结合能（300-500 atom O）的MOx可大大提高沉积于其上的Au纳米颗粒的催化活性.

关键词: 金属氧化物负载金纳米粒子催化剂, 载体效应, 一氧化碳氧化, 火山型关系, 金属-氧结合能

Abstract:

The effect of a wide variety of metal oxide (MOx) supports has been discussed for CO oxidation on nanoparticulate gold catalysts. By using typical co-precipitation and deposition-precipitation methods and under identical calcination conditions, supported gold catalysts were prepared on a wide variety of MOx supports, and the temperature for 50% conversion was measured to qualitatively evaluate the catalytic activities of these simple MOx and supported Au catalysts. Furthermore, the difference in these temperatures for the simple MOx compared to the supported Au catalysts is plotted against the metal-oxygen binding energies of the support MOx. A clear volcano-like correlation between the temperature difference and the metal-oxygen binding energies is observed. This correlation suggests that the use of MOx with appropriate metal-oxygen binding energies (300-500 kJ/atom O) greatly improves the catalytic activity of MOx by the deposition of Au NPs.

Key words: Metal oxide-supported gold nanoparticle catalyst, Support effects, Carbon monoxide oxidation, Volcano-like correlation, Metal-oxygen binding energy