Synthesis of Highly Active Nano-Sized Pt/CeO2 Catalyst via a Cerium Hydroxy Carbonate Precursor for Water Gas Shift Reaction

被引：42
|
作者：
Potdar, Hari S. [1 ]
Jeong, Dae-Woon [1 ]
Kim, Ki-Sun [1 ]
Roh, Hyun-Seog [1 ]
机构：
[1] Yonsei Univ, Dept Environm Engn, Wonju 220710, Gangwon Do, South Korea
来源：
CATALYSIS LETTERS | 2011年 / 141卷 / 09期
关键词：
Cerium hydroxy carbonate (CHC: Ce(OH)CO3); CeO2; Pt; Water gas shift (WGS); Precipitation/digestion; AUTOMOTIVE EXHAUST CATALYSTS; H-2; PRODUCTION; METHANE; NI/CE-ZRO2/THETA-AL2O3; HYDROXYCARBONATE; FABRICATION; NUCLEATION; STABILITY; POWDERS; GROWTH;
D O I：
10.1007/s10562-011-0656-5
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 novel precipitation/digestion route has been developed to synthesize crystalline cerium hydroxy carbonate (CHC: Ce(OH)CO3) by using an equimolar quantity of cerium nitrate (Ce(NO3)(3)center dot 6H(2)O) and mixed precipitants (KOH + K2CO3) at room temperature. Nano-sized CeO2 supports could be prepared by the pre-calcination of CHC at 400 degrees C for 4 h. A highly active water gas shift (WGS) catalyst, 1 wt.% Pt/CeO2 catalyst showed almost equilibrium CO conversion with 100% CO2 selectivity at 320 degrees C even at the gas hourly space velocity (GHSV) of 45,625 h(-1).
引用
收藏
页码：1268 / 1274
页数：7
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