Development of Potential Organic-Molecule-Based Hydrogen Storage Materials: Converting C-N Bond-Breaking Thermolysis of Guanidine to N-H Bond-Breaking Dehydrogenation

Published

September 8, 2016

Author(s)

Xiuquan Zhou, Wei Zhou, Terrence J. Udovic, Taner N. Yildirim, John J. Rush, Efrain E. Rodriguez, Hui Wu

Abstract

The small organic molecule guanidine CN₃H₅ can be anionized via a facile reaction with alkali-metal hydrides or amides with the formation of metal guanidinates (MCN₃H₄) and their guanidine adducts. They crystal structures and thermal decomposition properties of these organic-molecule-based complex hydrides were carefully investigated. Through metallation, MCN₃H₄ can completely preserve carbon atoms in the system and exhibit a largely improved thermal decomposition compared to CN₃H₅ regarding the extent of C-N bond breaking. By pairing H⁺ in CN₃H₅ with H^- from metal hydrides, the resulting composite can further reduce ammonia libration and promote an endothermic dehydrogenation.

Citation

International Journal of Hydrogen Energy

Volume

41

Pub Type

Journals

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Keywords

crystal structure determination, endothermic dehydrogenation, guanidine, hydrogen storage, metal guanidinates, neutron vibrational spectroscopy, x-ray diffraction

Citation

Zhou, X. , Zhou, W. , Udovic, T. , Yildirim, T. , Rush, J. , Rodriguez, E. and Wu, H. (2016), Development of Potential Organic-Molecule-Based Hydrogen Storage Materials: Converting C-N Bond-Breaking Thermolysis of Guanidine to N-H Bond-Breaking Dehydrogenation, International Journal of Hydrogen Energy, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920272 (Accessed February 12, 2025)