Complete Oxidation of Formaldehyde at Room Temperature Using TiO2 Supported Metallic Pd Nanoparticles

被引:301
作者
Huang, Haibao [1 ]
Leung, Dennis Y. C. [1 ]
机构
[1] Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China
来源
ACS CATALYSIS | 2011年 / 1卷 / 04期
关键词
Pd/TiO2; NaBH4; reduction; HCHO oxidation; room temperature; metallic Pd; VOLATILE ORGANIC-COMPOUNDS; CATALYTIC-OXIDATION; PALLADIUM CATALYSTS; PT/TIO2; CATALYST; CO OXIDATION; GAS-PHASE; O-XYLENE; GOLD; DECOMPOSITION; OXYGEN;
D O I
10.1021/cs200023p
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A series of reduced and oxidized Pd/TiO2 catalysts were prepared and used for catalytic oxidation of formaldehyde (HCHO) at room temperature. The reduced catalysts were much more active than the oxidized ones. Nearly 100% HCHO conversion was achieved over the former while it was less than 18% over the latter. Sodium borohydride (NaBH4) reduced Pd/TiO2 catalysts exhibited very high turnover frequencies of HCHO oxidation and kept highly active in the presence of chloride. Strong metal - support interaction, well-dispersed and negatively charged metallic Pd nanoparticles, and rich chemisorbed oxygen are probably responsible for the high catalytic activities over the former. Metallic Pd nanoparticles with a strong capacity for oxygen activation should be the active sites for catalytic oxidation of HCHO.
引用
收藏
页码:348 / 354
页数:7
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