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- Title
Hydrogen production from the catalytic dehydrogenation of dodecahydro-N-ethylcarbazole: effect of Pd precursor on the catalytic performance of Pd/C catalysts.
- Authors
Feng, Zhaolu; Chen, Xiaomin; Bai, Xuefeng
- Abstract
In this paper, Pd/C catalysts are synthesized via Ar glow-discharge plasma reduction using activated carbon as the support and Pd(acac)2, Pd(NO3)2, K2PdCl4, and H2PdCl4 as the Pd precursors, and their catalytic performances are investigated by hydrogen production from dodecahydro-N-ethylcarbazole (H12-NEC). Pd/C-A, prepared from Pd(acac)2, which has the smallest palladium nanoparticles (1.7 nm), the highest dispersion (34%) and no residue of inorganic ions, exhibits the best catalytic activity with a hydrogen release of 5.28 wt.%, which is 2.2 times that of Pd/C-H. The order of the apparent activation energies of the prepared Pd/C catalysts, according to the kinetics of the H12-NEC dehydrogenation reaction, is as follows: Pd/C-A ≈ Pd/C-N < Pd/C-K < Pd/C-H. When Pd(acac)2 with a large ligand acts as a cation Pd precursor, the effect of coulombic attraction to Pd2+ during the plasma reduction process makes it difficult for Pd nanoparticles (NPs) to migrate, which leads to the formation of ultrafine Pd NPs.
- Subjects
CATALYSTS; CATALYTIC dehydrogenation; HYDROGEN production; DEHYDROGENATION kinetics; CATALYTIC activity; ACTIVATED carbon; ACTIVATION energy
- Publication
Environmental Science & Pollution Research, 2021, Vol 28, Issue 43, p61623
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-021-15108-6