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| 双金属催化剂Pd-Coy/Al2O3的协同催化性能研究 |
| Study on Synergistic Catalytic Performance of Bimetallic Catalyst Pd-Coy/Al2O3 |
| Received:December 28, 2017 |
| DOI： |
| 中文关键词: 催化化学 2-乙基蒽醌 加氢 催化剂 钯 钴 协同作用 |
| 英文关键词: catalytic chemistry 2-ethyl-anthraquinon hydrogenation catalyst palladium cobalt synergistic effect |
| 基金项目:国家自然科学基金(21763014)。 |
| Author Name | Affiliation | E-mail | | XIE Jiyang | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Sino-Platinum Industrial Catalyst Yunnan Co. Ltd., Kunming 650106, China | 787423562@qq.com | | WANG Hongqin | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Sino-Platinum Industrial Catalyst Yunnan Co. Ltd., Kunming 650106, China | | | ZHOU Wei | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Sino-Platinum Industrial Catalyst Yunnan Co. Ltd., Kunming 650106, China | | | CHU Mingyue | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Sino-Platinum Industrial Catalyst Yunnan Co. Ltd., Kunming 650106, China | | | AN Nihong | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Sino-Platinum Industrial Catalyst Yunnan Co. Ltd., Kunming 650106, China | | | DAI Yunsheng | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co. Ltd., Sino-Platinum Industrial Catalyst Yunnan Co. Ltd., Kunming 650106, China | daiysh@ipm.com.cn |
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| 中文摘要: |
| 通过等体积浸渍法制备了单金属Pd/Al2O3催化剂和双金属Pd-Coy/Al2O3催化剂，并用于催化2-乙基蒽醌加氢反应。利用N2吸脱附、ICP-AES、XRD、CO化学吸附、TEM、EDX、XPS等表征催化剂的比表面、物相结构以及电子结构。加氢结果发现与单金属Pd/Al2O3催化剂相比，双金属Pd-Co0.2/Al2O3催化剂加氢效率从11.8 g/L提高到13.5 g/L，选择性从87.2%提高到95.2%。从XPS表征结果发现，催化剂掺杂Co后，一部分Pd颗粒将电子转移到氧化的Co上，形成Pd-Coδ+结构。由羰基活化机理可知，Coδ+吸附C=O中氧的孤对电子，活化C=O，使得C=O加氢反应变得更容易，从而Pd-Co催化剂表现出高催化效率。 |
| 英文摘要: |
| Pd-Co/Al2O3 and Pd/Al2O3 were prepared by the impregnation method and tested for the catalytic performance in the hydrogenation reaction of 2-ethylanthraquinone. Their texture structure, crystal phase structure and electron structure were characterized by means of N2 adsorption-desorption, ICP-AES, CO absorption, XRD, TEM, EDX and XPS. The results showed that the hydrogenation efficiency and selectivity of Pd-Co0.2/Al2O3 were 13.5 g/L and 95.2%, respectively, larger than 11.8 g/L and 87.2% of Pd/ Al2O3, revealing the synergistic effects between Pd and Co. From XPS characterization, it was found that after doping Co, the electrons of some Pd particles was transferred to oxidized Co to form a new structural species Pd-Coδ+. Coδ+in the Pd-Co/Al2O3 system may act as the electrophilic sites for the adsorption and activation of C=O of the 2-ethylanthraquinone molecule through the lone electron pair of the oxygen atom, resulting in the enhanced catalytic performance of Pd-Co catalyst for the hydrogenation of C=O. |
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