Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 251, Issue -, Pages 261-272Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.03.071
Keywords
Liquid organic hydrogen carrier; Dodecahydro-N-ethylcarbazole; Dehydrogenation catalysis; Dehydrogenation kinetics
Funding
- National Natural Science Foundation of China [21706203]
- China Postdoctoral Science Foundation [2016M592794, 2017T100754]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JQ2030]
- Postdoctoral Science Foundation in Shaanxi Province of China [2016BSHEDZZ20]
- Fundamental Research Funds for the Central Universities [xjj2018035]
- Fundamental Research Funds for the Central Universities (Creative Team Plan in Xi'an Jiaotong University) [cxtd2017004]
- Xi'an Jiaotong Univ.
- Shaanxi Coal Chemical Industry Technology Research Institute Co. Ltd.
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The unsatisfactory performance with high precious metal dosage of dehydrogenation catalysts has been the bottleneck for the development of liquid organic hydrogen carrier (LOHC). The most representative dodecahydro-N-ethylcarbazole in LOHC also faces the same problem. Here, we report a series of bimetallic PdCu catalysts with different ratios supported on reduced graphene oxide prepared by a facile one-pot synthesis method. The most cost-effective Pd1.2Cu/rGO catalyst with the lowest amount of precious metals in the catalysts reported for dehydrogenation of dodecahydro-N-ethylcarbazole was selected from a series of samples, while maintaining the catalytic activity and selectivity to the final product of N-ethylcarbazole as the Pd/rGO catalyst with the highest activity in recently reported studies. At the same time, the change of Pd and Cu content and the effect of preparation temperature on dehydrogenation performance were also studied, and the corresponding reaction kinetics were revealed. In combination with various characterization methods of catalyst, the relationship between structure and properties of PdCu NPs was explored in depth. The average particle size and electron transfer between Pd and Cu were identified as the key factors affecting the catalytic activity.
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