Thesis
Catalysis with Titania-Supported Palladium for Ammonia-Captured CO2-Based Bicarbonate-Formate Liquid Organic Hydrogen Carrier
Washington State University
Master of Science (MS), Washington State University
2023
DOI:
https://doi.org/10.7273/000005299
Abstract
Developing next-generation heterogeneous catalysts for efficient bicarbonate-formate systems is necessary for economical and environmentally friendly CO2-assisted hydrogen energy. The development of highly efficient heterogeneous catalysts without compromising on stability is still a challenging task. In this work, we synthesized the palladium (Pd) supported over titania (TiO2-x). The catalysts were subjected to electronic structure, geometric, and adsorption strength-based characterizations. The catalyst was evaluated for (ammonium)bicarbonate-formate (de)hydrogenation system kinetics and stability. The results revealed a synergistic effect of the hydrogen spillover and oxygen vacancies in enhancing catalyst activity. The oxygen vacancies were supposed to mobilize and stabilize the intermediate species, whereas the electron transfer from TiO2 to Pd was observed, creating strong metal-support interactions. The active sites were identified, and a possible mechanism for the (ammonium)bicarbonate-formate (de)hydrogenation system was suggested. The computational study investigated the electron mobility and binding energies of different species with and without oxygen vacancies.
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Details
- Title
- Catalysis with Titania-Supported Palladium for Ammonia-Captured CO2-Based Bicarbonate-Formate Liquid Organic Hydrogen Carrier
- Creators
- Ahmad Mukhtar
- Contributors
- Hongfei Lin (Advisor)Yong Wang (Committee Member)David Jacob Heldebrant (Committee Member)Mark Bowden (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Chemical Engineering and Bioengineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Number of pages
- 109
- Identifiers
- 99901031037501842
- Language
- English
- Resource Type
- Thesis