PtPd/TiO2低温甲苯氧化催化剂研究

IF 2.1 4区 化学 Q3 CHEMISTRY, PHYSICAL Catalysis Surveys from Asia Pub Date : 2021-05-15 DOI:10.1007/s10563-021-09335-7
Liheng Tu, Rui Liu, Dan Zhao, Hui Ding, Jiahao Cui, Benqiang Liang
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引用次数: 3

摘要

由于单原子的高表面能,制备高金属负载的原子分散催化剂仍然是一个艰巨的挑战。本文采用一种新的多用途方法制备了金属负载量高达8.17 wt%的PtPd/TiO2催化剂,该方法基于具有丰富氧缺陷的金属氧化物载体。PtPd/TiO2催化剂由PtPd纳米粒子和原子分散的Pt、Pd原子组成,PtPd纳米粒子的含量很少。在110℃条件下,Pt3Pd1/TiO2-400催化剂对甲苯的催化活性最高,转化率为94.7%。动力学研究表明,甲苯氧化遵循典型的Langmuir-Hinshelwood机理。实验研究表明,优异的催化活性可能归因于大量金属原子原子分散在催化剂表面。Pt和Pd原子相互靠近,产生协同效应,从而促进甲苯氧化。本研究为制备高负载单原子催化剂提供了一条有前景的途径。
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PtPd/TiO2 Catalysts for Low‐Temperature Toluene Oxidation

The preparation of atomically dispersed catalysts with high metal loading remains a formidable challenge due to the high surface energy of single atoms. Here we prepared PtPd/TiO2 catalysts possessing metal loading as high as 8.17 wt% by a new versatile method which based on metal oxide carriers with abundant oxygen defects. PtPd/TiO2 catalysts consist of PtPd nanoparticles and atomically dispersed Pt and Pd atoms, and the content of PtPd nanoparticles is little. Pt3Pd1/TiO2-400 catalyst exhibited the highest catalytic activity in toluene oxidation, and with a 94.7% conversion at 110 °C. Kinetic investigation reveals that the toluene oxidation follows a typical Langmuir-Hinshelwood mechanism. Experimental research indicates that the superior catalytic activity could be attributed to a large number of metal atoms atomically dispersed on the surface of the catalyst. Pt and Pd atoms are close to each other, which produces the synergetic effect and thereby promotes toluene oxidation. This work provides a promising pathway to fabricate single atom catalysts with high loading.

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来源期刊
Catalysis Surveys from Asia
Catalysis Surveys from Asia 化学-物理化学
CiteScore
4.80
自引率
0.00%
发文量
29
审稿时长
>12 weeks
期刊介绍: Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.
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