One-pot preparation of mesoporous KPMoO ( = 1, 2, 3, 4) materials for oxidative desulfurization: electrochemically-active surface area (ECSA) determines their activity

• Published in: Reaction chemistry & engineering Vol. 5; no. 9; pp. 1776 - 1782
• Main Authors: He, Jun, Guan, Lifang, Zhou, Yiqian, Shao, Peipei, Yao, Yue, Lu, Shuxiang, Kong, Lingbo, Liao, Xiaoyuan
• Format: Journal Article
• Language: English
• Published: 25.08.2020
• ISSN: 2058-9883
• DOI: 10.1039/d0re00213e

A series of pure polyoxometalate salts, K x [PMo 12 O 40 ] 3− (K x PMo, x = 1, 2, 3, 4), have been successfully prepared via a one pot hydrothermal method using F127 as a template. These obtained K x PMo materials are mesoporous, and have high surface area (>40 m 2 g −1 ) without depending on the supports. In particular, these K x PMo 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 K x PMo catalysts (such as K 1.0 PMo, K 2.0 PMo, K 3.0 PMo and K 4.0 PMo) are linearly correlated with their electrochemically-active surface area (ECSA). K 4.0 PMo has the largest ECSA value and exposes largest number anions ([PMo 12 O 40 ] 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 K x PMo materials. A series of pure polyoxometalate salts, K x [PMo 12 O 40 ] 3− (K x PMo, x = 1, 2, 3, 4), have been successfully prepared via a one pot hydrothermal method using F127 as a template.