共 38 条
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.
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页码:348 / 354
页数:7
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