Mechanistic insight into efficient H2 generation upon HCOONa hydrolysis

Fuhua Xu; Jiaying Yan; Yanlan Wang; Xiang Liu

doi:10.1016/j.isci.2023.106504

Mechanistic insight into efficient H₂ generation upon HCOONa hydrolysis

iScience. 2023 Mar 28;26(4):106504. doi: 10.1016/j.isci.2023.106504. eCollection 2023 Apr 21.

Authors

Fuhua Xu¹, Jiaying Yan¹, Yanlan Wang², Xiang Liu¹

Affiliations

¹ College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China.
² Department of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.

Abstract

Sodium formate (SF) is regarded as a technological additive to improve H₂ generation upon HCOOH dehydrogenation. The development of SF as a hydrogen storage material is still a challenge. Herein, we report the design and synthesis of carbon nanosphere-stabilized Pd nanoparticles (Pd/CNS) for the direct H₂ generation upon SF hydrolysis in the presence of Fe³⁺. The tandem reaction, isotopic mass spectrometry, and gas chromatograms result confirmed that SF hydrolysis generates H₂ 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 generation, transport, and storage of H₂.

Keywords: Chemical reaction; Electrochemistry.