Effect of mesoporous α-Fe2O3 nanoparticles doping on the structure and electrochemical hydrogen storage properties of Co0.9Cu0.1Si alloy

Preparation and electrochemical hydrogen storage properties of Co 9 S 8 alloy coated with cobalt/graphene composite

“…Ball-milling treatment, surface modification, additives were confirmed to be useful in improving the electrochemical properties of Co-based alloys. 25,26,31,49 Compared with these Co-S alloys and modified Co-S alloys reported previously, the Co 9 S 8 alloy covered with CoRGO in this work exhibited excellent electrochemical hydrogen storage performance. To study the influences of RGO and CoRGO adding on HRD, Co 9 S 8 , Co 9 S 8 + 6% RGO and Co 9 S 8 + 6% CoRGO samples were discharged at different current densities.…”

“…The Co 0.9 Cu 0.1 Si alloy doped with Pd exhibited increased capacity retention and discharge capacity 25 . In addition, porous α‐Fe 2 O 3 was fabricated by the hydrothermal method, Co 0.9 Cu 0.1 Si covered with mesoporous α‐Fe 2 O 3 exhibited good discharge capacity and high‐rate dischargeability 26 . The internal resistance was decreased and the charge transfer reaction was expedited after adding appropriate amount of active materials.…”

“…25 In addition, porous α-Fe 2 O 3 was fabricated by the hydrothermal method, Co 0.9 Cu 0.1 Si covered with mesoporous α-Fe 2 O 3 exhibited good discharge capacity and high-rate dischargeability. 26 The internal resistance was decreased and the charge transfer reaction was expedited after adding appropriate amount of active materials. Moreover, due to the high conductivity and special microstructures of carbon nanotubes, porous carbon and fullerene, the alloy doped with carbon materials also showed excellent properties for hydrogen storage.…”

Nonsiliceous Mesoporous Materials: Design and Applications in Energy Conversion and Storage

“…The mesoporous structure can be hybridized with a catalyst, for example, through the doping of Ni NPs into mesoporous carbon material to achieve superior MgH 2 deH/reH activity as a consequence of the synergistic effects of both destabilization and activation from Ni NPs . Loading an alloy with a mesoporous catalyst provides an effective method to increase the electrochemical H 2 storage properties of an alloy electrode . Another H 2 storage method exploits reversible chemical reactions, e.g., dehydrogenation of formate (HCO 2− + H 2 O → H 2 + HCO 3 − ) and hydrogenation of bicarbonate (H 2 + HCO 3 → H 2 O+ HCO 2 − ).…”

Preparation of carbon nanofiber supported Co nanoparticles for improving the electrochemical hydrogen storage properties of Co9S8 alloy

“…In general, doping active materials is one of the effective ways to advance the electrochemical properties of Co-based alloys. Liu et al doped Co 0.9 Cu 0.1 Si alloy with 5% α-Fe 2 O 3 , and the resulting composites showed higher discharge ability than the raw material [7]. The electrochemical performance of Co 2 B can also be improved by adding a Pd catalyst.…”