草酸盐热解法制备CoCeZrO复合氧化物用于催化CO-PROX的研究

摘要针对目前CO-PROX反应中钴基催化剂体系研究较少的问题，设计开发了草酸盐热解法制备Zr掺杂CoCe催化剂体系，研究了不同Zr掺杂量对CO-PROX反应活性的影响。结果表明：当Zr和Ce物质的量之比为3∶20时，CO-PROX反应的活性最好，在110℃可将CO完全转化，且在100℃以下O₂至CO₂的选择性维持在100%。BET测试表明，该样品具有最大的比表面积110 m²/g。TEM和XRD表征结果表明，该样品具有最好的Co₃O₄结晶度。H₂-TPR结果表明该样品具有最好的被还原能力。这些都有利于反应活性的提高。

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	高万贤
	李新刚
	田野

关键词：草酸盐 CoCeZrO CO优先氧化

Abstract： There are very few reports about Co-based catalysts for the CO-PROX in H₂-rich stream. To solve this problem, we developed CoCe catalyst system synthesized by oxalates pyrolysis method and studied the effect of different zirconium contents on catalytic performance of CO-PROX. When the molar ratio of zirconium to ceria is 3:20, the sample exhibits the best catalytic activity, which can achieve 100% CO conversion as low as 110℃ and keep 100% O₂ to CO₂ selectivity below 100℃. The BET results indicate that the sample possesses the largest specific surface area 110 m²/g. TEM and XRD results show that CoCeZr15 sample has the greatest crystallinity of Co₃O₄. H₂-TPR results suggest that the sample has excellent redox ability. All these factors above are beneficial to improving catalytic activity.

Keywords： oxalates； CoCeZrO； CO-PROX

Received 2016-04-11;

Corresponding Authors: 李新刚,E-mail:xingang_li@tju.edu.cn。 Email: xingang_li@tju.edu.cn

About author: 高万贤(1992-),男,硕士研究生,现从事CO优先氧化方面的研究。

引用本文:

高万贤, 李新刚, 田野.草酸盐热解法制备CoCeZrO复合氧化物用于催化CO-PROX的研究[J]. 化学工业与工程, 2018,35(5): 1-6

Gao Wanxian, Li Xingang, Tian Ye.Oxalates Pyrolysis Synthesis of Composite Oxide CoCeZrO for CO Preferential Oxidation in H₂-Rich Gases[J]. Chemcial Industry and Engineering, 2018,35(5): 1-6

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