We have located links that may give you full text access.
Enhanced hydrogen storage properties of MgH 2 co-catalyzed with K 2 NiF 6 and CNTs.
The composite of MgH2 /K2 NiF6 /carbon nanotubes (CNTs) is prepared by ball milling, and its hydrogenation properties are studied for the first time. MgH2 co-catalyzed with K2 NiF6 and CNTs exhibited an improvement in the onset dehydrogenation temperature and isothermal de/rehydrogenation kinetics compared with the MgH2 -K2 NiF6 composite. The onset dehydrogenation temperature of MgH2 doped with 10 wt% K2 NiF6 and 5 wt% CNTs is 245 °C, which demonstrated a reduction of 25 °C compared with the MgH2 + 10 wt% K2 NiF6 composite. In terms of rehydrogenation kinetics, MgH2 doped with 10 wt% K2 NiF6 and 5 wt% CNTs samples absorbed 3.4 wt% of hydrogen in 1 min at 320 °C, whereas the MgH2 + 10 wt% K2 NiF6 sample absorbed 2.6 wt% of hydrogen under the same conditions. For dehydrogenation kinetics at 320 °C, the MgH2 + 10 wt% K2 NiF6 + 5 wt% CNTs sample released 3.3 wt% hydrogen after 5 min of dehydrogenation. By contrast, MgH2 doped with 10 wt% K2 NiF6 released 3.0 wt% hydrogen in the same time period. The apparent activation energy, Ea , for the dehydrogenation of MgH2 doped with 10 wt% K2 NiF6 reduced from 100.0 kJ mol-1 to 70.0 kJ mol-1 after MgH2 was co-doped with 10 wt% K2 NiF6 and 5 wt% CNTs. Based on the experimental results, the hydrogen storage properties of the MgH2 /K2 NiF6 /CNTs composite is enhanced because of the catalytic effects of the active species of KF, KH and Mg2 Ni that are formed in situ during dehydrogenation, as well as the unique structure of CNTs.
Full text links
Related Resources
Trending Papers
Proximal versus distal diuretics in congestive heart failure.Nephrology, Dialysis, Transplantation 2024 Februrary 30
World Health Organization and International Consensus Classification of eosinophilic disorders: 2024 update on diagnosis, risk stratification, and management.American Journal of Hematology 2024 March 30
Heart failure with preserved ejection fraction: diagnosis, risk assessment, and treatment.Clinical Research in Cardiology : Official Journal of the German Cardiac Society 2024 April 12
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app