期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 56, 页码 32168-32178出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.08.162
关键词
Incipient impregnation; Bimetallic catalyst; Catalytic dehydrogenation; Hydrogen storage; LOHCs
资金
- Major project of Technical Innovation of Hubei Province [2019AAA163]
- Zhejiang Provincial Natural Science Foundation of China [LGG20B030001]
- Shandong Provincial Development and Reform Commission Major Project
- National Key Research and Development Program of China [2018YFB1502903]
- National Natural Science Foundation of China [21875225]
- Fundamental Research Funds for Central Universities [CUG180604]
Palladium/platinum-based catalysts are widely used in the dehydrogenation process of Liquid Organic Hydrogen Carriers (LOHCs). The cost of noble metal has become a main drawback for LOHCs large-scale application. Partial replacement of Pd/Pt by other transition metals can be an effective solution. In this paper, we synthesize the bimetallic Pd-Ni catalyst by incipient wet impregnation and the catalytic dehydrogenation performance of perhydro-N-propylcarbazole (12H-NPCZ) as a LOHC candidate. Ni and Pd were impregnated on mesoporous alumina to obtain both monometallic and bimetallic catalysts, i.e. Pd/Al2O3, Ni/Al2O3 and Pd-Ni/Al2O3 (Pd:Ni = 1:1) with total metal loading of 5 wt%, respectively. The above catalysts were characterized by N-2-adsorption/desorption, H-2-temperature programmed reduction, X-Ray diffraction, X-Ray photoelectron spectroscopy, Inductively coupled plasma - optical emission spectrometer, CO pulse adsorption and Transmission electron microscopy. The catalytic dehydrogenation results indicated that the bimetallic Pd-Ni/Al2O3 showed best catalytic activity, followed by Pd/Al2O3, commercial Pd/Al2O3 and Ni/Al2O3. Notably, the catalytic activity of bimetallic was well maintained after 5 cycles at 200 degrees C with no degradation, indicating this bimetallic catalyst has potential prospect for large-scale application. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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