The porous material ATZ with micro-mesopore hierarchical porosity was prepared by alkali treatment of parent HZSM-5 zeolite and applied for propane dehydrogenation. The zeolite samples were characterized by XRD, N2- p...The porous material ATZ with micro-mesopore hierarchical porosity was prepared by alkali treatment of parent HZSM-5 zeolite and applied for propane dehydrogenation. The zeolite samples were characterized by XRD, N2- physisorption, and NH3-TPD analysis. The results showed that the alkali treatment can modify the physicochemical prop- erties of HZSM-5 zeolite. In this case, the porous material ATZ showed larger extemal surface area with less acid sites as compared to the HZSM-5 zeolite. It was found out that the alkali treatment of HZSM-5 zeolite could promote the catalytic performance of PtSn/ATZ catalyst. The possible reason was ascribed to the low acidity of ATZ. Furthermore, the presence of mesopores could reduce the carbon deposits on the metallic surface, which was also favorable for the dehydrogenation reaction.展开更多
Well-dispersed bimetallic NiRh nanoparticles （NPs） with different compositions supported on nitrogen-doped porous carbon （NPC） derived from metal-organic frameworks （ZIF-8） were synthesized through a co-reductio...Well-dispersed bimetallic NiRh nanoparticles （NPs） with different compositions supported on nitrogen-doped porous carbon （NPC） derived from metal-organic frameworks （ZIF-8） were synthesized through a co-reduction method. The NPC-900 supported NiRh catalyst exhibits the highest catalytic activity and 100% hydrogen selectivity toward hydrogen generation from hydrazine. These properties might be attributed to the high surface area and high graphitization of the NPC. This strategy may open up a new avenue for designing high-performance catalysts by utilizing NPC as a support to anchor active metal NPs for additional applications.展开更多
基金the Production and Research Prospective Joint Research Project(BY2009153)Science and the National Nature Science Foundation of China(50873026,21106017)for financial supportthe Specialized Research Fund for the Doctoral Program of Higher Education of China(20100092120047)
文摘The porous material ATZ with micro-mesopore hierarchical porosity was prepared by alkali treatment of parent HZSM-5 zeolite and applied for propane dehydrogenation. The zeolite samples were characterized by XRD, N2- physisorption, and NH3-TPD analysis. The results showed that the alkali treatment can modify the physicochemical prop- erties of HZSM-5 zeolite. In this case, the porous material ATZ showed larger extemal surface area with less acid sites as compared to the HZSM-5 zeolite. It was found out that the alkali treatment of HZSM-5 zeolite could promote the catalytic performance of PtSn/ATZ catalyst. The possible reason was ascribed to the low acidity of ATZ. Furthermore, the presence of mesopores could reduce the carbon deposits on the metallic surface, which was also favorable for the dehydrogenation reaction.
基金Acknowledgements This work was financially supported by the National Natural Science Foundation of China （Nos. 21201134 and 21571145）, the Natural Science Foundation of Jiangsu Province （No. BK20130370）, the Natural Science Foundation of Hubei Province （No. 2013CFB288）, the Creative Research Groups of Hubei Province （No. 2014CFA007）, and Large-scale Instrument and Equipment Sharing Foundation of Wuhan University.
文摘Well-dispersed bimetallic NiRh nanoparticles （NPs） with different compositions supported on nitrogen-doped porous carbon （NPC） derived from metal-organic frameworks （ZIF-8） were synthesized through a co-reduction method. The NPC-900 supported NiRh catalyst exhibits the highest catalytic activity and 100% hydrogen selectivity toward hydrogen generation from hydrazine. These properties might be attributed to the high surface area and high graphitization of the NPC. This strategy may open up a new avenue for designing high-performance catalysts by utilizing NPC as a support to anchor active metal NPs for additional applications.
