负载型Ru基催化剂催化CO氧化的载体效应

摘要以CeO₂、拟薄水铝石[AlO(OH)]、γ-Al₂O₃和ZrO₂为载体,Ru为活性组分,采用沉积沉淀法制备了不同载体的Ru基催化剂。通过XRD、H₂-TPR、BET和XPS等方法对所制备的催化材料进行了表征,考察了载体差异对催化CO氧化性能的影响。结果表明,不同载体主要影响Ru物种和载体之间的相互作用,显示出明显的载体效应。其中,Ru/CeO₂-BM催化剂中Ru物种的分散性好,且能够产生氧空位,表现出优良的低温催化氧化性能。在反应温度为147 ℃、氧过量系数为5、空速为60 000 h^-1的条件下,CO转化率达到99.9%,产物中CO浓度降低到1×10^-5以下。

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	郑晰文
	金石山
	曾欣
	韩蛟
	胡绍争
	张磊
	高志贤

关键词： Ru基催化剂载体相互作用 CO催化氧化

Abstract： CeO₂, pseudo boehmite [AlO(OH)], γ-Al₂O₃ and ZrO₂ were used as the carriers, and Ru was the active component, Ru based catalysts with different carriers were prepared using a deposition precipitation method. The prepared catalytic materials were characterized by XRD, H₂-TPR, BET, XPS, etc, and the influence of carrier on the catalytic CO oxidation was also explored. The results indicated that different carriers mainly affected the interaction between Ru species and the carrier, showing obvious support effects. Among them, the Ru species on Ru/CeO₂-BM catalyst exhibited good dispersion and could generate oxygen vacancies, thus exhibiting excellent low-temperature catalytic performance. Under the conditions of an oxygen excess coefficient of 5, a space velocity of 60 000 h^-1, and the reaction temperature of 147 ℃, the outlet CO concentration decreased to less than 1×10^-5, and the CO conversion reached 99.9%.

Keywords： Ru based catalyst support interact CO catalytic oxidation

Received 2023-09-13;

Fund:国家自然科学基金(22379059);辽宁省应用基础研究计划项目(2023JH2/101300224);辽宁省教育厅服务地方项目(揭榜挂帅)(LJKFZ20220201);辽宁省教育厅面上项目(LJKMZ20220728)。

Corresponding Authors: 张磊,教授,lnpuzhanglei@163.com;高志贤,教授,gaozx@lnpu.edu.cn。 Email: lnpuzhanglei@163.com;gaozx@lnpu.edu.cn

About author: 郑晰文(2000—),女,硕士研究生,现从事催化新材料研发。

引用本文:

郑晰文, 金石山, 曾欣, 韩蛟, 胡绍争, 张磊, 高志贤.负载型Ru基催化剂催化CO氧化的载体效应[J]. 化学工业与工程, 2025,42(2): 45-54

ZHENG Xiwen, JIN Shishan, ZENG Xin, HAN Jiao, HU Shaozheng, ZHANG Lei, GAO Zhixian.Support effects of Ru based catalysts for CO catalytic oxidation[J]. Chemcial Industry and Engineering, 2025,42(2): 45-54

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