文献类型：期刊文献

英文题名：Regulating the Selective Dispersion of Tungsten Oxide to Promote Propane Combustion on Pt-Nanoparticle Catalysts Supported on WOx/ZrO2 by Tuning the Zirconia Crystal Phase

作者：Shao, Chuntao[1];Yang, Jie[1];You, Yang[1];Tang, Xuan[1];Tang, Jie[2];Wang, Li[1];Cui, Yao[2];Zhan, Wangcheng[1];Guo, Yanglong[1];Guo, Yun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Lab Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Shanghai HuaYi New Mat Co Ltd, Technol Dept, Shanghai 201507, Peoples R China

年份：2022

卷号：5

期号：9

起止页码：13482

外文期刊名：ACS APPLIED NANO MATERIALS

收录：;EI(收录号：20224112859706);WOS:【SCI-EXPANDED(收录号:WOS:000864619000001)】；

基金：This project was supported financially by the National Natural Science Foundation of China (U21A20326, 21976057, 21922602, and 21673072) , the Shanghai Science and Technology Innovation Plan Program (19DZ1208000) , the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (SKL-SPM- 202018) , and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：propane oxidation; Pt catalysts; WOx; ZrO2; crystal phase

摘要：Low-temperature catalytic oxidation of propane on Pt-based catalysts is of paramount importance but remains a major challenge for the emission control of volatile organic compounds (VOCs). Here, we report the promoting effects of doped WOx on 0.5 wt % Pt/ZrO2 catalysts for propane oxidation, which strongly depended on the crystal structure of ZrO2. Among them, 0.5 wt % Pt/WOx/t-ZrO2 shows the highest catalytic activity, the T-90 is 216 degrees C, which is about 155 and 80 degrees C lower than that of Pt/t-ZrO2 and Pt/WOx/m-ZrO2, respectively, and the turnover frequency (TOF) of Pt/WOx/t-ZrO2 at 190 degrees C is about 3 times that of Pt/WOx/m-ZrO2. Multicharacterization results show that compared with Pt/ WOx/m-ZrO2, doped WOx can be highly dispersed on t-ZrO2 and form the solid solution-like (Zr1-xWxO2+x/2) nanolayer structure at the catalyst surface, which produces additional strong Bronsted acid sites and metallic Pt (Pt-0) sites via an electron transfer from W to Pt on Pt/WOx/t-ZrO2. The synergistic effect of Pt-0 and strong acidity at the Pt-Zr(1-x)WxO(2+x/2) interface facilitates the rapid removal of surface intermediates including carboxylate and CO generated during the reaction and promotes C3H8 oxidation on Pt/WOx/t-ZrO2. This work highlights a direction for the design of high-efficiency metal oxide-modified Pt/ZrO2 nanoscale catalysts by changing the crystal structure of the ZrO2 support for the removal of VOCs.