Preheated self-aligned graphene oxide for enhanced room temperature hydrogen storage |
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| Affiliation: | 1. Department of Physics, Central University of Rajasthan, NH-8, Bandersindri, Kishangarh, Ajmer, 305817, Rajasthan, India;2. Lightweight Metallic Materials Division, CSIR-Advanced Materials and Processes Research Institute, Habibganj Naka, Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India;3. Integrated Approach for Design and Product Development Division, CSIR-Advanced Materials and Processes Research Institute, Habibganj Naka, Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India;1. Department of Physics, Central University of Rajasthan, Ajmer 305817, India;2. Inter University Accelerator Centre, New Delhi 110067, India;1. Department of Physics, Central University of Rajasthan, Ajmer 305 817, Rajasthan, India;2. Anugrah Memorial College, Gaya, 823 001, India;1. Applied and Theoretical Mechanics (ATOM) Laboratory, Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Simrol, Indore 453552, India;2. Department of Mechanical Engineering, Indian Institute of Technology Bhilai, Raipur 492015, India;1. Science and Technology on Aerospace Chemical Power Laboratory, Xiangyang 441003, PR China;2. Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, PR China;3. College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, PR China |
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| Abstract: | This study explored the hydrogen adsorption capacity of self-assembled aligned graphene oxide at room temperature. The characteristics of as-prepared graphene oxide were determined by scanning electron microscopy, Raman spectroscopy, and X-ray diffractometry techniques. Three different temperatures were taken for preheating, i.e., 25, 250, and 400 °C. The maximum adsorption pressure was given to 20 bar, and we evaluated the hydrogen adsorption competency at room temperature (25 ± 2 °C). The maximum hydrogen storage capacity was achieved ~2.5 wt%, which was found for the graphene oxide sample preheated at 400 °C. This hydrogen storage capacity was 67% and 40% more than the graphene oxide samples preheated at 25 and 250 °C, respectively. Such an enhancement of hydrogen storage capacity in the self-aligned graphene oxide samples at room temperature is attributed to reduced interlayer spacing and increased topological defects in preheated graphene oxide samples at 400 °C. |
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| Keywords: | Hydrogen storage Adsorption Graphene oxide Self-assembled Room temperature |
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