负载型金催化剂上室温一氧化碳氧化催化性能的原位红外、脉冲反应及程序升温脱附-离子迁移谱研究。

In situ IR, pulse reaction and TPD-ITD study of catalytic performance of room-temperature carbon monoxide oxidation on supported gold catalysts.

作者信息

Hao Zheng-ping, Zhang Shi-chao, Liu Zhi-ming, Zhang Hui-ping

机构信息

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

出版信息

J Environ Sci (China). 2002 Oct;14(4):489-94.

PMID:12491722

Abstract

With in situ IR, two different CO adsorption bands were detected on various chemical state gold catalysts. One band is attributed to the linear CO on an oxidized gold catalyst(2100 cm-1), the other one is ascribed to the bridged CO on metallic gold (2085 cm-1), CO pulse reaction showed that Au/Fe2O3 catalyst had a room-temperature activity even in the presence of moisture. The produced CO2 was detained and more easily desorbed from supported gold catalyst than support oxide. TPD-IDT results indicated that the O2- superoxide ions are the possible active oxygen species.

摘要

通过原位红外光谱，在各种化学状态的金催化剂上检测到两种不同的CO吸附带。一个吸附带归因于氧化金催化剂上的线性CO（2100 cm-1），另一个归因于金属金上的桥式CO（2085 cm-1），CO脉冲反应表明，即使在有水汽存在的情况下，Au/Fe2O3催化剂仍具有室温活性。生成的CO2被截留，并且从负载型金催化剂上比从载体氧化物上更容易脱附。程序升温脱附-离子解离阈值（TPD-IDT）结果表明，超氧离子O2-可能是活性氧物种。