| 低温下Pt/Al_2O_3和Pd/Al_2O_3光辅助乙二醇水相重整制氢研究 |
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| 引用本文： | 低温下Pt/AlO和Pd/AlO光辅助乙二醇水相重整制氢研究.低温下Pt/Al_2O_3和Pd/Al_2O_3光辅助乙二醇水相重整制氢研究[J].燃料化学学报,2019,47(12):1486-1494. |
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| 作者姓名： | 低温下Pt/AlO和Pd/AlO光辅助乙二醇水相重整制氢研究 |
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| 作者单位： | 1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | 山西省重点研发计划（国际科技合作）项目（2015081044）资助 |
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| 摘 要： | 采用浸渍还原法制备了氧化铝负载的Pt和Pd纳米颗粒催化剂,用于光辅助乙二醇水相重整制氢反应。结果表明,光照能够有效降低乙二醇水相重整制氢的活化能,Pt/Al_2O_3比Pd/Al_2O_3具有更高的H_2转换频率(TOF)和更低的CO选择性。采用XRD、TEM、UV-vis等技术对催化剂的结构和形貌进行了表征,原位漫反射红外光谱(DRIFTS)表明,光照能促进乙二醇分子O-H键的断裂。理论计算表明,Pt/Al_2O_3催化乙二醇重整制氢反应产物中较低的CO选择性主要归因于CO在Pt表面较小的反应能垒,能够较快与H_2O解离的O反应生成CO_2。
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| 关 键 词： | 制氢 乙二醇 光催化 水相重整 金属催化剂 |
| 收稿时间： | 2019-10-16 |
Low temperature light-assisted hydrogen production from aqueous reforming ethylene glycol over Pt/Al2O3 and Pd/Al2O3 catalysts |
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| WANG Rui-yi,LIU Huan,ZHENG Zhan-feng.Low temperature light-assisted hydrogen production from aqueous reforming ethylene glycol over Pt/Al2O3 and Pd/Al2O3 catalysts[J].Journal of Fuel Chemistry and Technology,2019,47(12):1486-1494. |
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| Authors: | WANG Rui-yi LIU Huan ZHENG Zhan-feng |
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| Abstract: | Al2O3 supported Pt and Pd nanoparticle catalysts were prepared by impregnation-reduction method, and employed in the photocatalytic aqueous-phase reforming of ethylene glycol. Light illumination can decrease the reaction activation energy remarkably. Pt/Al2O3 exhibits much higher H2 turnover frequency (TOF) and lower CO selectivity than Pd/Al2O3 catalyst. Their morphology and structure were characterized by XRD, TEM, UV-vis techniques. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) indicates light can promote the cleavage of O-H bonds of ethylene glycol molecule. DFT calculation suggests the lower CO selectivity over Pt/Al2O3 catalyst can be attributed to the low energy barriers of reaction in the step of CO+O→CO2. |
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| Keywords: | hydrogen production ethylene glycol photocatalysis aqueous-phase reforming metal catalyst |
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