Probing the thermal-enhanced catalytic activity of CO oxidation over Pd/OMS-2 catalysts
Probing the thermal-enhanced catalytic activity of CO oxidation over Pd/OMS-2 catalysts
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探讨 Pd/OMS-2 催化剂上 CO 氧化的热增强催化活性
DOI：
10.1039/c7ra07814e
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Duan Yankang
中科院分区：
文献类型：
--
作者：
Liu Xin;Zhang Qiulin;Ning Ping;Liu Qixian;Song Zhongxian;Duan Yankang
研究了不同热处理温度对OMS-2负载钯催化剂的CO氧化活性和物化性能的影响。Pd/OMS-2的催化活性随着热处理温度的升高而增加。最佳Pd/OMS-2催化剂在35 °C下表现出超过99%的CO转化率。升高的热处理温度高达500 °C导致OMS-2结晶度和表面化学吸附氧（-OH）的降低，而氧/Mn和钯的表面原子比随着煅烧温度而增加。高于500 °C的高温热处理温度导致OMS-2向Mn 2 O3的相变，以及Pd-载体相互作用的突然改变和Pd/OMS-2催化剂的失活。
The present research has probed the effect of different thermal-treatment temperatures on the catalytic activity of CO oxidation and the physio-chemical properties of an OMS-2 supported palladium catalyst. The catalytic activity of Pd/OMS-2 increased with an increase in the thermal-treatment temperature from 300 to 500 °C. The optimal Pd/OMS-2 catalyst exhibited over 99% CO conversion at 35 °C. An elevated thermal-treatment temperature up to 500 °C led to a decrease in OMS-2 crystallinity and surface chemisorbed oxygen (–OH), while the surface atomic ratios of oxygen/Mn and palladium increased with the calcination temperature. A high thermal-treatment temperature above 500 °C led to the phase transformation of OMS-2 into Mn2O3, and an abrupt alteration in the Pd–support interaction and deactivation of the Pd/OMS-2 catalyst.