Journal
SCIENCE CHINA-CHEMISTRY
Volume 62, Issue 12, Pages 1625-1633Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-019-9578-8
Keywords
Ru catalyst; MgO support; ammonia decomposition; hydrogen production; structure-activity relation
Categories
Funding
- Excellent Young Scientists Fund from National Natural Science Foundation of China [21622106]
- National Natural Science Foundation of China [21773288, 21805167, 11574281, 21771117]
- Science Foundation of Shandong Province of China [JQ201703, ZR2018BB010]
- Taishan Scholar Project of Shandong Province of China
- National Key Basic Research Program of China [2017YFA0403402]
- Future Program for Young Scholar of Shandong University
Ask authors/readers for more resources
Catalytic decomposition of NH3 to high purity hydrogen offers a promising strategy for fuel cells, but presents challenges for high hydrogen yields at comparatively low temperatures due to the lack of efficient catalysts. Here, we report the facile preparation of ultra-fine ruthenium (Ru) species dispersed on MgO, which show excellent activity and high temperature stability for NH3 decomposition reaction. The hydrogen yield of the prepared Ru/MgO catalysts reaches ca. 2,092 mmol H-2 g(Ru)(-1) min(-1) at 450 degrees C, far exceeding that of the previously reported most reactive Ru-based catalysts and the same chemical composition samples prepared by other approaches. Various characterization techniques containing X-ray absorption fine structure (XAFS), in-situ diffuse reflectance infrared Fourier transform spectroscopy (in-situ DRTFTS) and temperature-programmed reduction/desorption (TPR/TPD) were carried out to explore the structure-function relation of the prepared Ru/MgO catalysts. We found that the Ru species interact strongly with the MgO support, which can efficiently protect the Ru species and MgO support from agglomerating during NH3 decomposition test, maintaining the stability of the catalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available