Surface modification of graphitic carbon nitride nanoparticles with B,O and S doping/carbon vacancy for efficient dehydrogenation of sodium borohydride in methanol |
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| Affiliation: | 1. State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Space Power Technology State Key Laboratory, Shanghai Institute of Space Power-Sources, Shanghai 200245, PR China;1. Jihua Laboratory, Foshan 528000, China;2. University of Science and Technology of China, Hefei 230026, China;1. Departamento de Ingeniería Química, Biotecnología y Materiales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Beauchef 851, Piso 6-poniente, Santiago, 8370456, Chile;2. Centro de Diseño Sustentable e Ingeniería Sistémica de Procesos (ProSus), Universidad de Chile, Av. Beauchef 851, Piso 6-poniente, Santiago, 8370456, Chile;3. Departamento de Ingeniería Civil, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Blanco Encalada 2002, Piso 3, Santiago, 8370449, Chile;4. Centro Avanzado Para Tecnologías del Agua (CAPTA), Universidad de Chile, Av. Blanco Encalada 2002, Piso 3, Santiago, 8370449, Chile;1. State Key Laboratory of Heavy Oil Processing, The Key Laboratory of Catalysis of CNPC, College of Chemical Engineering and Environment, China University of Petroleum, No. 18 Fuxue Road, Changping, Beijing, 102249, China;2. College of Sciences, China University of Petroleum, No. 18 Fuxue Road, Changping, Beijing, 102249, China |
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| Abstract: | Herein, the surface properties of graphitic carbon nitride (GCN) with sulphur(S), boron (B) and oxygen (O) dopants were improved. The heteroatom-doped metal-free GCN exhibited both rich surface functional groups and a carbon defect structure. These metal-free catalysts were used to obtain hydrogen (H2) from the sodium borohydride (SB) methanolysis for the first time. Compared to GCN, S, B, and O doped GCN catalyst obtained showed a 2.2-fold improvement in H2 production. HGR value obtained with B, O and S doped GCN (10 mg) via SB of 2.5% was 9166 ml min ?1g?1. XPS, SEM-EDX, TEM, FTIR, and XRD analyses were used for the structural properties of catalysts. The activation energy (Ea) for B, O and S doped GCN was 28.89 kJ mol?1. |
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| Keywords: | Carbon nitride Carbon vacancy Boron oxygen Sulphur Hydrogen |
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