A study of relative electrochemical hydrogen storage capacity of active materials based on Zn3Mo2O9/ZnO and Zn3Mo2O9/ZnMoO4

The novel electrode materials for hydrogen storage application synthesized with different composition based on zinc molybdate. So, prepared Zn3Mo2O9/ZnMoO4 and Zn3Mo2O9/ZnO compared with pure Zn3Mo2O9 in terms of structural characterization, physical properties and electrochemical activity in the energy storage. Synthesis of these series of materials was conducted through facile hydrothermal process by preparation of MoO3 as precursor. The results show higher capacity of Zn3Mo2O9/ZnMoO4 and Zn3Mo2O9/ZnO nano-composites than pure Zn3Mo2O9 nanostructures. The hydrogen storage capacity for Zn3Mo2O9/ZnMoO4, Zn3Mo2O9/ZnO and pure Zn3Mo2O9 measured about 1945, 1536 and 1450 mAhg(-1) after 15 cycles at constant current of 1 mA in alkaline potassium hydroxide electrolyte, respectively. According to the obtained results, the electrode materials based on zinc molybdate represents perfect capacity for hydrogen storage as talented active materials. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

Novel electrode materials for hydrogen storage based on zinc molybdate with different compositions were synthesized and compared. Zn3Mo2O9/ZnMoO4 and Zn3Mo2O9/ZnO nano-composites showed higher hydrogen storage capacity compared to pure Zn3Mo2O9 nanostructures. After 15 cycles at a constant current of 1 mA in alkaline potassium hydroxide electrolyte, the hydrogen storage capacity of Zn3Mo2O9/ZnMoO4, Zn3Mo2O9/ZnO, and pure Zn3Mo2O9 were measured as approximately 1945, 1536, and 1450 mAhg(-1), respectively. The electrode materials based on zinc molybdate exhibited excellent hydrogen storage performance.