From the chemical catalysis viewpoint,the excellent performance of CNTs in adsorption-activation of H2 and in promoting spillover of adsorbed H-species is very attractive,in addition to their nanosize channels,sp2-C c...From the chemical catalysis viewpoint,the excellent performance of CNTs in adsorption-activation of H2 and in promoting spillover of adsorbed H-species is very attractive,in addition to their nanosize channels,sp2-C constructed surfaces,and high thermal/electrical conductivity.This review examines some recent progresses of CNTs as a novel support or promoter of catalysts for certain hydrogenation or dehydrogenation reactions,e.g.,hydrogenation-conversion of syngas to yield alcohols and decomposition or steam-reforming of methanol to generate H2,mainly based on recent work carried out in our laboratory.展开更多
The gas-phase reactions of[IrC_(4)H_(2)]^(+)with methane and water have been explored by using mass spectrometry combined with quantum chemical calculations.Interestingly,under the employed conditions,two isomers of[I...The gas-phase reactions of[IrC_(4)H_(2)]^(+)with methane and water have been explored by using mass spectrometry combined with quantum chemical calculations.Interestingly,under the employed conditions,two isomers of[IrC_(4)H_(2)]^(+)co-exist with different reactivity.One of them only activates methane while the other is solely reactive with water to produce CO.Apparently,upon varying the coordination patterns,the Ir center gains rather distinct capabilities of mediating the bond breaking and making processes.The reactivity toward methane mainly depends on the orbital orientation,while the π-aromaticity of the reaction complex matters for the conversion of water.The experimental and theoretical findings in this work not only imply the promising role the Ir atom can play in the bulk-system methane conversion,but may also be instructive on how to construct a highperformance center for steam reforming of methane.展开更多
基金supported by the National Basic Research Program of China(2011CBA00508)the National Natural Science Foundation of China(20923004)the Program for Changjiang Scholars and Innovative Research Team in University(IRT1036)
文摘From the chemical catalysis viewpoint,the excellent performance of CNTs in adsorption-activation of H2 and in promoting spillover of adsorbed H-species is very attractive,in addition to their nanosize channels,sp2-C constructed surfaces,and high thermal/electrical conductivity.This review examines some recent progresses of CNTs as a novel support or promoter of catalysts for certain hydrogenation or dehydrogenation reactions,e.g.,hydrogenation-conversion of syngas to yield alcohols and decomposition or steam-reforming of methanol to generate H2,mainly based on recent work carried out in our laboratory.
基金supported by the National Natural Science Foundation of China(21878265,21603037,21973016)。
文摘The gas-phase reactions of[IrC_(4)H_(2)]^(+)with methane and water have been explored by using mass spectrometry combined with quantum chemical calculations.Interestingly,under the employed conditions,two isomers of[IrC_(4)H_(2)]^(+)co-exist with different reactivity.One of them only activates methane while the other is solely reactive with water to produce CO.Apparently,upon varying the coordination patterns,the Ir center gains rather distinct capabilities of mediating the bond breaking and making processes.The reactivity toward methane mainly depends on the orbital orientation,while the π-aromaticity of the reaction complex matters for the conversion of water.The experimental and theoretical findings in this work not only imply the promising role the Ir atom can play in the bulk-system methane conversion,but may also be instructive on how to construct a highperformance center for steam reforming of methane.
