Catalytic effect of Ni@rGO on the hydrogen storage properties of MgH2

• DOI: 10.1016/j.jma.2019.06.006
• Publication Date: 2020-05-13T21:46:20Z
• Authors: Pengyang Yao; Ying Jiang; Yang Liu; Chengzhang Wu; Kuo-Chih Chou; Tao Lyu; Qian Li
• Keywords: Mining engineering. Metallurgy; Catalytic mechanism; TN1-997; Hydrogenation/dehydrogenation properties; Ni@rGO; Hydrogen storage materials; 02 engineering and technology; MgH2; 0210 nano-technology

Uniform-dispersed Ni nanoparticles (NPs) anchored on reduced graphene oxide ([email protected]) catalyzed MgH2 has been fabricated by mechanical milling. The effects of milling time and loading amount the hydrogen storage properties have investigated. initial desorption temperature 10 wt.% Ni4@rGO6 for 5 h is significantly decreased from 251 °C to 190 °C. composite can absorb 5.0 in 20 min at 100 °C, while it desorb 6.1 within 15 300 Through investigation phase transformation dehydrogenation kinetics during ab/desorption cycles, we found that in-situ formed Mg2Ni/Mg2NiH4 exhibited better catalytic effect than Ni. When 45 wt.%, rGO [email protected] catalysts prevent reaction Mg due strong interaction between NPs.