Fabrication of highly dispersed Pd nanoparticles supported on reduced graphene oxide for solid phase catalytic hydrogenation of 1,4-bis(phenylethynyl) benzene |
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| Affiliation: | 1. State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;2. Institute of Materials, China Academy of Engineering Physics, Mianyang 621700, Sichuan, China;1. Department of Environmental Engineering, Sunchon National University, 255 Jungang-ro, Sunchon, Jeonnam, 57922, Republic of Korea;2. Korea Institute of Carbon Convergence Technology, R&D Division, 110-11 Banryong-ro, Jeonju, 54853, Republic of Korea;3. Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 05006, Republic of Korea;4. University of Seoul, School of Environmental Engineering, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul, 02504, Republic of Korea;1. College of Materials Sciences and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, PR China;2. Central Iron & Steel Research Institute, Advanced Technology & Materials Co., Ltd., Jiangsu JITRI Advanced Energy & Materials Research Institute Co., Ltd. 76 South College Road, Beijing, 100081, PR China;3. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing, 211816, PR China |
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| Abstract: | In this work, nanopalladium catalysts supported on the surface of reduced graphene oxide (rGO/Pd) with different palladium loadings have been prepared by one-step reduction in aqueous phase. They were mixed with 1,4-bis(phenylethynyl)benzene (DEB) to form rGO/Pd-DEB composites according to a mass ratio of 1:3. It was shown that nanopalladium particles with particle size of about 2–6 nm were disperse uniformly on the surface of rGO when the Pd loadings were in the range of 3.97–10.60 wt%. The maximum hydrogen uptake capacity of rGO/Pd-DEB composites at 25 °C determined according to PCT method was about 182.5 ml/g after reacted with hydrogen for about 20 h, which was some lower than that of the common Pd/C-DEB pallet getter (216 ml/g) but significantly higher than alkynyl modified polyvinyl alcohol supported palladium hydrogen absorbing materials (0.32 ml/g), indicating that rGO/Pd could be used in solid phase catalytic hydrogenation due to the high dispersion of palladium nanoparticles and the physical proximity of rGO/Pd catalyst with DEB organic molecules. This provides a good potential technical way for perparing the moldable carbon aerogel hydrogen absorption materials. |
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| Keywords: | Graphene Palladium 1 4-bis(phenylethynyl)benzene Hydrogen getter Solid phase catalytic hydrogenation |
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