Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol

CHEN Qingbo; LUO Laitao; WANG Jianxin

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Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol

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- Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol
- CIESC Journal Issue 4, Pages: 898-903(2008)
- 作者机构：
  
  南昌大学应用化学研究所,江西,南昌,330031
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 April 2008，
  
  Published：05 April 2008
- 稿件说明：
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CHEN Qingbo, LUO Laitao, WANG Jianxin. Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol[J]. CIESC Journal, 2008, (4): 898-903.
DOI：

CHEN Qingbo, LUO Laitao, WANG Jianxin. Effect of supports on activity of Au-Pd catalysts for partial oxidation of methanol[J]. CIESC Journal, 2008, (4): 898-903. DOI：

摘要

采用沉积沉淀法制备了一系列Au-Pd双金属催化剂，研究了不同载体对Au-Pd双金属催化剂甲醇部分氧化性能的影响，并运用XRD、TPD和TPR等手段对催化剂进行了表征。结果表明，Au-Pd/CeO2催化剂中形成的AuxPdy合金和氧空穴较多，致使Au-Pd/CeO2催化剂的活性较高;CeO2-TiO2和CeO2-ZrO2复合载体较大的比表面积和固溶体的形成有利于H2选择性的提高;Au-Pd/CeO2-ZrO2和Au-Pd/CeO2-TiO2催化剂有较高H2产率的主要原因是H2选择性的提高。

Abstract

Au-Pd catalysts were prepared by the deposition-precipitation method

and their activities for partial oxidation of methanol were evaluated. XRD

TPR and TPD were used to characterize the catalysts.In comparison to Au-Pd/CeO2-ZrO2 and Au-Pd/CeO2-TiO2 catalysts

the activity of Au-Pd/CeO2 catalyst for partial oxidation of methanol was higher

which can be related to the formation of more AuxPdy alloy and more oxygen vacancies.The hydrogen selectivity of Au-Pd/CeO2 was improved by using additional support (ZrO2 or TiO2)

probably due to a combination of different factors

such as increasing active surface area and dispersion.A higher hydrogen yield was found for Au-Pd/CeO2-ZrO2 and Au-Pd/CeO2-TiO2 catalysts because of their higher hydrogen selectivity.

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