Efficient dehydrogenation of a formic acid–ammonium formate mixture over Au3Pd1 catalyst
| Autor: | Xiao-Tong Guo, Shu-Yong Zhang, Zhihui Li, Jian-Chao Chi, Xinru Liu, Juan Zhang, Yu-Chen Liu |
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| Rok vydání: | 2019 |
| Předmět: |
Order of reaction
Formic acid General Chemical Engineering 02 engineering and technology General Chemistry Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Ammonium formate Dehydrogenation Formate 0210 nano-technology Nuclear chemistry |
| Zdroj: | RSC Advances. 9:5995-6002 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c8ra09534e |
| Popis: | A series of AuPd/C catalysts were prepared and tested for the first time for active and stable dehydrogenation of a formic acid–ammonium formate (FA–AF) mixture. The catalysts with different Au-to-Pd molar ratios were prepared using a facile simultaneous reduction method and characterized using transmission electron microscopy (TEM), high-resolution TEM, energy dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. It was found that the catalytic activity and stability of the Au3Pd1/C catalyst was the best. The initial turnover frequency for the dehydrogenation of the FA–AF mixture over the Au3Pd1/C catalyst can reach 407.5 h−1 at 365 K. The reaction order with respect to FA and AF is 0.25 and 0.55, respectively. The apparent activation energy of dehydrogenation is 23.3 ± 1.3 kJ mol−1. The catalytic activity of the Au3Pd1/C catalyst remains ca. 88.0% after 4 runs, which is much better than the single Pd/C catalyst. The mechanism for the dehydrogenation is also discussed. |
| Databáze: | OpenAIRE |
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