Mechanistic insight into efficient H2 generation upon HCOONa hydrolysis

Authors：Xu, Fuhua; Yan, Jiaying; Wang, Yanlan; Liu, Xiang^*

Source：iScience, 2023, 26(4): 106504.

DOI：10.1016/j.isci.2023.106504

• HYDROGEN-PRODUCTION
• HIGHLY EFFICIENT
• FORMIC-ACID
• DIMETHYLAMINE-BORANE
• PALLADIUM NANOPARTICLES
• CATALYST
• DEHYDROGENATION
• CARBON
• PD
• HYDRAZINE

Sodium formate (SF) is regarded as a technological additive to improve H-2 generation upon HCOOH dehydrogenation. The development of SF as a hydrogen stor-age material is still a challenge. Herein, we report the design and synthesis of carbon nanosphere-stabilized Pd nanoparticles (Pd/CNS) for the direct H-2 gener-ation upon SF hydrolysis in the presence of Fe3+. The tandem reaction, isotopic mass spectrometry, and gas chromatograms result confirmed that SF hydrolysis generates H-2 with one H atom provided by SF and other H by H2O. The kinetic study and detailed mechanistic investigations have demonstrated that the concerted process between the cleavage of O-H bond in H2O and-O2C-H bond oxidative addition is the rate-controlling step in SF hydrolysis. This work offers a new chemical hydrogen storage material (HCOONa) for the high-efficiency gen-eration, transport, and storage of H-2.