Influence of hierarchical ZSM-5 catalysts with various acidity on the dehydration of glycerol to acrolein

The main challenge in the dehydration of glycerol to acrolein lies in overcoming catalystdeactivation and improving the selectivity to acrolein. The relationship between theacidity in the mesoporous channels and catalytic performance of glycerol dehydration israrely reported. In this work, to investigate the influence of acidity in the mesoporouschannels of hierarchical ZSM-5 catalysts on the dehydration of glycerol to acrolein, a seriesof hierarchical ZSM-5 zeolites with comparable mesoporous volume and mesoporous sizebut different acid properties in mesopores have been successfully prepared via alkalinetreatment. The sample with the abundant mesoporosity and highest acidity display thebest performance.

Interface catalytic reduction of alumina by nickle for the aluminum nanowire growth: Dynamics observed by in situ TEM

Metal nanowires show promise in a broad range of applications and can be fabricated via a number of methods,such as vapor–liquid–solid process and template-based electrodeposition.However,the synthesis of Al nanowires(NWs)is still challenging from the stable alumina substrate.In this work,the Ni-catalyzed fabrication of Al NWs has been realized using various Al_(2)O_(3) substrates.The growth dynamics of Al NWs on Ni/Al_(2)O_(3) was studied using in situ transmission electron microscopy(TEM).The effect of alumina structures,compositions,and growth temperature were investigated.The growth of Al NWs correlates with the Na addition to the alumina support.Since no eutectic mixture of nickel aluminide was formed,a mechanism of Ni-catalyzed reduction of Al_(2)O_(3) for Al NWs growth has been proposed instead of the vapor–liquid–solid mechanism.The key insights reported here are not restricted to Ni-catalyzed Al NWs growth but can be extended to understanding the dynamic change and catalytic performance of Ni/Al_(2)O_(3) under working conditions.

Intramolecular Charge Transfer-Enhanced BODIPY Photosensitizer in Photoinduced Electron Transfer and Its Application to Photoxidation under Mild Condition

Photoinduced 电子转移过程是在 photooxidation 的一个关键步骤获得合成化学药品。然而，当在所有的优先级很少在逐步的详细被学习了，电子的驱动力转。此处，我们报导有 intramolecular 上的一个重音的一系列 BODIPY 衍生物控告转移，提高 photoinduced 电子转移过程和 photooxidation 表演的关键步骤。一系列新奇 BODIPY photosensitizers (B-1-B-5 ) 被准备，充电注射组被结合到 2,6-diiodo-styryl-BODIPY 的 B-3 氨基的 diethylamine，和电子在那里转移动力，由于它的更否定的氧化还原作用潜力被提高 1.6 次。这些结果被 DFT/TDDFT 计算也证实。没有纯氧， B-3 能仍然在温和状况下面在 1,4-DHP 的 photoxidative aromatization 展出非凡的表演。在为 28 min 的照耀以后，变换率来到了 98.2% 。