| 苏慧娟.KOH修饰的Au/Al2O3催化剂对低温CO氧化反应的催化性能[J].分子催化,2011,(1):43-48 |
| KOH修饰的Au/Al2O3催化剂对低温CO氧化反应的催化性能 |
| Low temperature CO oxidation over KOH-modified Au/Al2O3 catalysts |
| 投稿时间：2010-12-29 修订日期：2011-01-25 |
| DOI： |
| 中文关键词: Au/Al2O3催化剂 KOH CO氧化反应 稳定性 |
| 英文关键词:Au catalyst KOH CO oxidation stability |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 采用等体积浸渍法制备了KOH-Au/Al2O3系列催化剂，考察了催化剂对低温CO氧化反应的初始活性和干、湿原料气氛下连续反应的稳定性能，并用电感耦合等离子发射光谱、红外光谱、高分辨电镜、紫外漫反射光谱等技术对催化剂进行了结构表征。结果表明：修饰催化剂（KOH-Au/Al2O3）与母体催化剂（Au/Al2O3）相比，活性在一定程度上有所降低，但其连续反应的稳定性比母体催化剂有所提高，这与修饰催化剂预吸附空气中的CO2在催化剂表面形成的碳酸根物种有关。 |
| 英文摘要: |
| A series of KOH-Au/Al2O3 catalysts were prepared by the incipient wetness impregnation method. The catalysts were characterized by HRTEM, UV-vis, IR and ICP-AES techniques. Their catalytic activity and on-line stability for CO oxidation in dry and wet feed at low temperatures were investigated. The results show that the addition of KOH enhanced the stability at the expense of the catalytic activity, and it is ascribed to the pre-formation of carbonate-like species on the catalyst surface from CO2 in air. |
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