Electrochemical hydrogen evolution of multi-walled carbon nanotube/micro-hybrid composite decorated with Ni nanoparticles as catalyst through electroless deposition process |
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Authors: | Nazanin Rahimi Mohammad Mahdi Doroodmand Samad Sabbaghi Mohammad Hossein Sheikhi |
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Affiliation: | 1. Nano Chemical Engineering, Department, Shiraz University, Shiraz, Iran;2. Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran;3. Nanotechnology Research Center, Shiraz University, Shiraz, Iran |
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Abstract: | Hydrogen evolution of multi-walled nanotube (MWCNT)/micro-hybrid polymer composite, decorated with Ni nanoparticles through electroless deposition process is studied by the electrochemical method. Cyclic voltammetry (CV) is utilized to clearly study the electrochemical hydrogen storage/evolution behavior of the composite through a potential window ranging from ? 1.60 to + 0.60 V (vs. Ag/AgCl). Hydrogen adsorption/desorption peaks are positioned at ? 1.52 and ? 0.05 V, respectively. Chronoamperometry is also applied to estimate active surface area (0.145 m2 g? 1) of the composite as well as the diffusion coefficient (3.4 × 10? 11 m2 s? 1) of adsorbed hydrogen process. According to the chrono-charge/discharge technique, the capacity of fabricated Ni-MWCNT/micro-hybrid composite is estimated to be 2.98 wt.% during charging for a certain time (40 min). |
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