The production of C_(2)H_(3)Cl from CH_(3)Cl(MCTV)represents a promising non-petroleum route for synthesizing C_(2)alkenes from C_(1)molecules.Exploration of new MCTV catalysts is crucial for advancing sustainable che...The production of C_(2)H_(3)Cl from CH_(3)Cl(MCTV)represents a promising non-petroleum route for synthesizing C_(2)alkenes from C_(1)molecules.Exploration of new MCTV catalysts is crucial for advancing sustainable chemical production.In this study,we present NaVO_(3)as a surface-confined coupling center for·CH_(2)Cl radicals,demonstrating its superior performance in the selective coupling of methyl chloride to synthesize vinyl chloride.By incorporating NaVO_(3)onto the surface of CeO_(2),the catalyst enables effective capture of·CH_(2)Cl radicals during the CH_(3)Cl oxidative pyrolysis and their subsequent conversion into C_(2)H_(3)Cl.We experimentally validate the capability of highly dispersed Na-VO_(3)to controllably couple·CH_(2)Cl radicals through in-situ synchrotron-based vacuum ultraviolet photoionization mass spectrometry.The results demonstrate that the dispersion of NaVO_(3)on the catalyst surface has a considerable impact on the reaction efficiency of·CH_(2)Cl radicals and the overall MCTV performance.This discovery holds substantial implications for the controlled C_(1)radical transformation and provides a guidance for the design of catalysts for sustainable production of C_(2)H_(3)Cl.展开更多
We report VO_(x)/NaVO_(3) nanocomposite as a novel saturable absorber for the first time,to the best of our knowledge.The efficient nonlinear absorption coefficient and the modulation depth are determined by the Z-sca...We report VO_(x)/NaVO_(3) nanocomposite as a novel saturable absorber for the first time,to the best of our knowledge.The efficient nonlinear absorption coefficient and the modulation depth are determined by the Z-scan technology.As a saturable absorber,a passively Q-switched Nd-doped bulk laser at 1.34μm is demonstrated,producing the shortest pulse duration of 129 ns at a repetition rate of 274 kHz.In the passively Q-switched Tm:YLF laser with the prepared saturable absorber,the shortest pulse duration was 292 ns with a repetition rate of 155 kHz.Our work confirmed the saturable absorption in VO_(x)/NaVO_(3) for possible optical modulation in the near-infrared region.展开更多
文摘The production of C_(2)H_(3)Cl from CH_(3)Cl(MCTV)represents a promising non-petroleum route for synthesizing C_(2)alkenes from C_(1)molecules.Exploration of new MCTV catalysts is crucial for advancing sustainable chemical production.In this study,we present NaVO_(3)as a surface-confined coupling center for·CH_(2)Cl radicals,demonstrating its superior performance in the selective coupling of methyl chloride to synthesize vinyl chloride.By incorporating NaVO_(3)onto the surface of CeO_(2),the catalyst enables effective capture of·CH_(2)Cl radicals during the CH_(3)Cl oxidative pyrolysis and their subsequent conversion into C_(2)H_(3)Cl.We experimentally validate the capability of highly dispersed Na-VO_(3)to controllably couple·CH_(2)Cl radicals through in-situ synchrotron-based vacuum ultraviolet photoionization mass spectrometry.The results demonstrate that the dispersion of NaVO_(3)on the catalyst surface has a considerable impact on the reaction efficiency of·CH_(2)Cl radicals and the overall MCTV performance.This discovery holds substantial implications for the controlled C_(1)radical transformation and provides a guidance for the design of catalysts for sustainable production of C_(2)H_(3)Cl.
基金supported by the National Natural Science Foundation of China (Nos. 12174223, 12004213, 21872084, and 62175128)the Young Scholar Program of Shandong University for the financial support
文摘We report VO_(x)/NaVO_(3) nanocomposite as a novel saturable absorber for the first time,to the best of our knowledge.The efficient nonlinear absorption coefficient and the modulation depth are determined by the Z-scan technology.As a saturable absorber,a passively Q-switched Nd-doped bulk laser at 1.34μm is demonstrated,producing the shortest pulse duration of 129 ns at a repetition rate of 274 kHz.In the passively Q-switched Tm:YLF laser with the prepared saturable absorber,the shortest pulse duration was 292 ns with a repetition rate of 155 kHz.Our work confirmed the saturable absorption in VO_(x)/NaVO_(3) for possible optical modulation in the near-infrared region.
