近期，我院教师张刘挺、肖蓓蓓，研究生孙泽、颜年华、陆雄等的研究成果“Excellent catalysis of Mn3O4 nanoparticles on the hydrogen storage properties of MgH2: An experimental and theoretical study”在《Nanoscale Advances》上发表。
Recently, transition metal oxides have been evidenced to be superior catalysts for improving the hydrogen desorption/absorption performance of MgH2. In this paper, Mn3O4 nanoparticles with a uniform size of around 10 nm were synthesized by a facile chemical method and then introduced to modify the hydrogen storage properties of MgH2. With the addition of 10 wt% Mn3O4 nanoparticles, the MgH2-Mn3O4 composite started to release hydrogen at 200 °C and approximately 6.8 wt% H2 could be released within 8 min at 300 °C. For absorption, the completely dehydrogenated sample took up 5.0 wt % H2 within 10 min under 3 MPa hydrogen even at 100 °C. Compared with pristine MgH2, the activation energy value of absorption for the MgH2+10 wt% Mn3O4 composite decreased from 72.5±2.7 to 34.4±0.9 kJ/mol. The catalytic mechanism of Mn3O4 was also explored and discussed with the solid evidence from X-ray diffraction (XRD), Transmission Electron Microscope (TEM) and Energy Dispersive X-Ray Spectroscopy (EDS) studies. Density functional theory calculations revealed that the Mg–H bonds were extracted and weakened with the doping of Mn3O4. In addition，cycling test showed that hydrogen capacity and reaction kinetics of MgH2-Mn3O4 could be favourably preserved in 20 cycles, indicative of promising application as solid-state hydrogen storage material in future hydrogen society.