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学者姓名：范玫
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Abstract ：
Activated carbon (AC) from bamboo having super surfaces areas of 3155 m(2)/g were firstly doped with nitrogen by microwave assisted hydrothermal methodology, to obtain nitrogen doped activated carbon (NAC) with N content of 1.64 wt%. Pt-AC composites with Pt nanoparticles at various loadings of 2.87-6.73 wt% were then prepared by wet impregnation methods. N-2 adsorption at 77 K, ICP-OES, XRD, TEM, EDX, SEM, and H-2 chemisorption were used to investigate the morphological, structural and textural properties of AC composites. The results showed that i) increasing Pt content gave rise to an increase of the metal particle size, Ii) N doping resulted in smaller Pt nanoparticle and hence better dispersion, and iii) the surface area decreased after Pt doping due to the pore blocking. Hydrogen storage capacities were measured both at 77 K up to lbar and 298 K up to 4 MPa. The capacity of hydrogen storage at 77 K was closely related to the porous texture, whether the heteroatom or metal Pt doped, and the hydrogen storage on Pt doped NAC at 298 K presented much higher enhancement factor of 1.82 compared with the Pt doped AC due to the spillover effect, depending on Pt content. The hydrogen uptakes/storage on Pt-N-doped AC were also higher than on pure AC doped with Pt due to the further enhancement with the spillover effect, which should be attributed to the better Pt dispersion and smaller Pt nanoparticle size obtained.
Keyword ：
Activated carbons Activated carbons Hydrogen storage Hydrogen storage Nitrogen doping Nitrogen doping Pt-AC composites Pt-AC composites Spillover effect Spillover effect
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| GB/T 7714 | Zhao, W. , Luo, L. , Chen, T. et al. Synthesis and characterization of Pt-N-doped activated biocarbon composites for hydrogen storage [J]. | COMPOSITES PART B-ENGINEERING , 2019 , 161 : 464-472 . |
| MLA | Zhao, W. et al. "Synthesis and characterization of Pt-N-doped activated biocarbon composites for hydrogen storage" . | COMPOSITES PART B-ENGINEERING 161 (2019) : 464-472 . |
| APA | Zhao, W. , Luo, L. , Chen, T. , Li, Z. , Zhang, Z. , Wang, H. et al. Synthesis and characterization of Pt-N-doped activated biocarbon composites for hydrogen storage . | COMPOSITES PART B-ENGINEERING , 2019 , 161 , 464-472 . |
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Abstract ：
A series of cost-effective heteroatom-doped porous carbons has been developed from the agricultural by-products of fir bark by a two-step carbonization and activation process. The morphology, chemical characterization and texture properties were investigated by thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectrometry (XPS), elemental analysis (EA), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and N-2 adsorption-desorption at 77 K. The results show that fir bark is a suitable precursor for preparing heteroatom-doped activated carbon, corresponding to hetero-oxygen (2.05-7.35 wt. %) and nitrogen (0.8-1.5 wt. %) doping. The lab-made AC materials derived from fir bark, with a surface area of 1377 m(2)/g, showed a very excellent sorption performance for CO2 up to 7 mmol/g and 5.2 mmol/g at 273 K and 298 K up to 1 bar, which was significantly higher than the commercial carbon materials and were among the highest compared with other biomass based ACs. The high CO2 uptakes, moderate heat of adsorption (Qst), good selectivity show that the high performance activated carbons for CO2 capturing at low pressure can be prepared by KOH activation of fir bark.
Keyword ：
Activated carbon Activated carbon Carbon dioxide capture Carbon dioxide capture Fir bark Fir bark Heteroatom doping Heteroatom doping
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| GB/T 7714 | Luo, L. , Chen, T. , Li, Z. et al. Heteroatom self-doped activated biocarbons from fir bark and their excellent performance for carbon dioxide adsorption [J]. | JOURNAL OF CO2 UTILIZATION , 2018 , 25 : 89-98 . |
| MLA | Luo, L. et al. "Heteroatom self-doped activated biocarbons from fir bark and their excellent performance for carbon dioxide adsorption" . | JOURNAL OF CO2 UTILIZATION 25 (2018) : 89-98 . |
| APA | Luo, L. , Chen, T. , Li, Z. , Zhang, Z. , Zhao, W. , Fan, M. . Heteroatom self-doped activated biocarbons from fir bark and their excellent performance for carbon dioxide adsorption . | JOURNAL OF CO2 UTILIZATION , 2018 , 25 , 89-98 . |
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