One-pot preparation of mesoporous KxPMo12O40(x=1, 2, 3, 4) materials for oxidative desulfurization: electrochemically-active surface area (ECSA) determines their activity
One-pot preparation of mesoporous KxPMo12O40(x=1, 2, 3, 4) materials for oxidative desulfurization: electrochemically-active surface area (ECSA) determines their activity
复制标题
一锅法制备氧化脱硫介孔KxPMo12O40(x=1,2,3,4)材料：电化学活性表面积（ECSA）决定其活性
DOI：
10.1039/d0re00213e
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发表时间：
2020-09-01
影响因子：
3.9
通讯作者：
Liao, Xiaoyuan
中科院分区：
文献类型：
--
作者：
He, Jun;Guan, Lifang;Liao, Xiaoyuan
以F_（127）为模板剂，采用一锅法成功合成了一系列纯聚氧乙烯酸盐K-x[PMo_（12）O_（40）]（3-）（KxPMo，x= 1，2，3，4）。这些获得的KxPMo材料是介孔的，并且具有高表面积（>40 m2 g-1）而不依赖于载体。特别地，这些KxPMo材料显示出增加的氧化脱硫（ODS）效率。这些材料可以重复使用，柴油在1h内完全脱硫。此外，我们的实验测试表明，KxPMo催化剂（如K1.0PMo，K2.0PMo，K3.0PMo和K4.0PMo）的高活性与其电化学活性表面积（ECSA）呈线性相关。K4.0PMo具有最大的ECSA值和暴露最多的阴离子（[PMo 12 O 40]（3-）），导致最佳的ODS活性。该研究揭示了ECSA在ODS反应中的作用，为ODS在介孔KxPMo材料中的应用提供了新的认识。
A series of pure polyoxometalate salts, K-x[PMo12O40](3-)(KxPMo,x= 1, 2, 3, 4), have been successfully preparedviaa one pot hydrothermal method using F127 as a template. These obtained KxPMo materials are mesoporous, and have high surface area (>40 m(2)g(-1)) without depending on the supports. In particular, these KxPMo materials display an increased efficiency towards oxidative desulfurization (ODS). These materials could be reused, and result in the complete desulfurization of diesel in 1 h. In addition, our experimental test shows that the high activity of KxPMo catalysts (such as K1.0PMo, K2.0PMo, K3.0PMo and K4.0PMo) are linearly correlated with their electrochemically-active surface area (ECSA). K4.0PMo has the largest ECSA value and exposes largest number anions ([PMo12O40](3-)), resulting in the best ODS activity. This study reveals the role of ECSA in the ODS reaction, providing a new understanding for ODS in mesoporous KxPMo materials.