Significant enhancement of the electrochemical hydrogen uptake of reduced graphene oxide via boron-doping and decoration with Pd nanoparticles |
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| Affiliation: | 1. Advanced Functional Nanohybrid Material Laboratory, Department of Chemistry, Dongguk University, Seoul-campus, Seoul 04620, Republic of Korea;2. Research Center for Photoenergy Harvesting&Conversion Technology, Dongguk University, Seoul-campus, Seoul 04620, Republic of Korea;1. Department of Chemistry, Vels Institute of Science, Technology & Advanced Studies (VISTAS), Chennai 600 117, Tamil Nadu, India;2. Centre for Advanced Research & Development (CARD),/Chemistry, Vels Institute of Science, Technology & Advanced Studies (VISTAS), Chennai 600 117, Tamil Nadu, India;3. Institute for Energy Technology, P.O Box 40, NO 2027-Kjeller, Norway;1. School of Chemical and Metallurgical engineering, University of the Witwatersrand, Johannesburg, South Africa;2. Advanced Materials Division, Mintek, Private Bag x3105, Randburg, 2194, Gauteng, South Africa;3. Materials for Energy Research Group, University of the Witwatersrand, Johannesburg, South Africa;4. Theoretical Chemistry, Technische Universität Dresden, 01062, Dresden, Germany;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: | Development of advanced hydrogen storage materials with high capacity and stability is vital to achieve an envisaged hydrogen economy. Here, we report a uniformly dispersed Pd nanoparticles on the boron-doped reduced graphene oxide (Pd/B-rGO) as a novel nanocomposite for efficient hydrogen storage. The effects of the incorporation of Pd NPs and the substitution of boron atoms into the graphene-based nanomaterial matrix on the electrochemical hydrogen up-taking and releasing were comparatively studied using electrochemical techniques, and duly supported by density functional theory (DFT) calculations. The discharge capacities of the Pd-rGO and Pd/B-rGO nanocomposites were determined to be over 45 and 128 times higher than that of the Pd NPs, respectively, showing that the B doping and the rGO support played significant roles in the enhancement of the hydrogen storage capability. Moreover, the galvanostatic charging and discharging cycling tests demonstrated a high stability and efficient kinetics of the Pd/B-rGO nanocomposite in the H2SO4 electrolyte for hydrogen up-taking and release. |
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| Keywords: | Palladium nanoparticles Reduced graphene oxide Boron doping Hydrogen spillover Hydrogen storage |
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