A catalyst consisting of platinum nanoparticles on a ZIF-8 support（Pt@ZIF-8） was synthesized in a straightforward one-step procedure,by adding a nanostructured platinum sol during the formation of ZIF-8 at room temp...A catalyst consisting of platinum nanoparticles on a ZIF-8 support（Pt@ZIF-8） was synthesized in a straightforward one-step procedure,by adding a nanostructured platinum sol during the formation of ZIF-8 at room temperature.Pt@ZIF-8 was highly porous and well crystallized.The Pt nanoparticles were well dispersed within the ZIF-8 support.In the hydrogenation of 1,4-butynediol,Pt@ZIF-8 exhibited high activity,excellent selectivity for 1,4-butenediol of greater than 94%,and reusability.The Pt@ZIF-8 catalyst did not require further additives.The favorable catalytic performance was attributed primarily to the modification of the ZIF-8 support by the platinum nanoparticles.展开更多
以AlEt_2Cl为助催化剂,将一维金属铁有机配位聚合物应用于乙烯齐聚,并考察了金属铁有机配位聚合物的真空处理温度、催化体系的反应时间、反应压力、催化剂用量和n(Al)/n(Fe)对乙烯齐聚性能的影响.结果表明,该一维铁催化体系的C8选择性高...以AlEt_2Cl为助催化剂,将一维金属铁有机配位聚合物应用于乙烯齐聚,并考察了金属铁有机配位聚合物的真空处理温度、催化体系的反应时间、反应压力、催化剂用量和n(Al)/n(Fe)对乙烯齐聚性能的影响.结果表明,该一维铁催化体系的C8选择性高达94.75%,其中α-C8占19.18%,催化活性可达3.88×10~5g/(mol Fe h).展开更多
With the use of techniques in nonlinear problems, the IDP (improved discrepancy principle) method has been proposed and applied to the optimal smooth factor (parameterγ) in the inversion process of atmosphere profile...With the use of techniques in nonlinear problems, the IDP (improved discrepancy principle) method has been proposed and applied to the optimal smooth factor (parameterγ) in the inversion process of atmosphere profiles from satellite observation. This method has also been used to inverse atmospheric parameters from the observation of new generation geostationary operational environmental satellite (GOES-8). Results show that this method is more accurate than that in use.展开更多
基金supported by the National Natural Science Foundation of China(21573031 and 21428301)the Fundamental Research Funds for the Central Universities(DUT15ZD106 and DUT15RC(4)09)~~
文摘A catalyst consisting of platinum nanoparticles on a ZIF-8 support（Pt@ZIF-8） was synthesized in a straightforward one-step procedure,by adding a nanostructured platinum sol during the formation of ZIF-8 at room temperature.Pt@ZIF-8 was highly porous and well crystallized.The Pt nanoparticles were well dispersed within the ZIF-8 support.In the hydrogenation of 1,4-butynediol,Pt@ZIF-8 exhibited high activity,excellent selectivity for 1,4-butenediol of greater than 94%,and reusability.The Pt@ZIF-8 catalyst did not require further additives.The favorable catalytic performance was attributed primarily to the modification of the ZIF-8 support by the platinum nanoparticles.
文摘以AlEt_2Cl为助催化剂,将一维金属铁有机配位聚合物应用于乙烯齐聚,并考察了金属铁有机配位聚合物的真空处理温度、催化体系的反应时间、反应压力、催化剂用量和n(Al)/n(Fe)对乙烯齐聚性能的影响.结果表明,该一维铁催化体系的C8选择性高达94.75%,其中α-C8占19.18%,催化活性可达3.88×10~5g/(mol Fe h).
文摘With the use of techniques in nonlinear problems, the IDP (improved discrepancy principle) method has been proposed and applied to the optimal smooth factor (parameterγ) in the inversion process of atmosphere profiles from satellite observation. This method has also been used to inverse atmospheric parameters from the observation of new generation geostationary operational environmental satellite (GOES-8). Results show that this method is more accurate than that in use.
