Abstract
Ammonia is a potential fuel for producing and storing hydrogen, but its usage is constrained by the high cost of the noble metal catalysts to decompose NH3. Utilizing non-precious catalysts to decompose ammonia increases its potential for hydrogen production. In this study, carborundum (SiC)-supported cobalt catalysts were prepared by impregnating Co3O4 nanoparticles (NPs) on SiC support. The catalysts were characterized by high-resolution transmission electron microscope, X-ray photoelectron spectroscopy, temperature programmed reduction, etc. The results show that the large specific surface area of SiC can introduce highly distributed Co3O4 NPs onto the surface. The amount of Co in the catalysts has a significant effect on the catalyst structure, particle size and catalytic performances. Due to the interaction of cobalt species with SiC, the 25Co/SiC catalyst provided the optimal ammonia conversion of 73.2% with a space velocity of 30,000 mL gcat−1 h−1 at 550 °C, corresponding to the hydrogen production rate of 24.6 mmol H2 gcat−1 min−1. This research presents an opportunity to develop highly active and cost-effective catalysts for hydrogen production via NH3 decomposition.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (21878001, 22078002 and 22078027) and International Joint Lab of Jiangsu Education Department. Special thanks to the support from Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University (ACGM2016-06-02 and ACGM2016-06-03), Projects Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and Postgraduate Research & Practice Innovation Program of Jiangsu Province.
Funding
National Natural Science Foundation of China, 21878001, Zhi** Lei, 22078002, Zhi** Lei, 22078027, Fengxiang Yin.
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Li, G., Tan, Y., Lei, Z. et al. Preparation of high surface area carborundum-supported cobalt catalysts for hydrogen production by ammonia decomposition. Carbon Lett. 33, 899–908 (2023). https://doi.org/10.1007/s42823-023-00471-w
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DOI: https://doi.org/10.1007/s42823-023-00471-w