Enhanced formaldehyde oxidation on CeO2/AlOOH-supported Pt catalyst at room temperature

被引：146
作者：
Yan, Zhaoxiong [1 ,2 ]
Xu, Zhihua [1 ,2 ]
Yu, Jiaguo [1 ,4 ]
Jaroniec, Mietek [3 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Materials Synth & Proc, Wuhan 430070, Peoples R China
[2] Huanggang Normal Univ, Hubei Key Lab Proc & Applicat Catalyt Mat, Huanggang 438000, Peoples R China
[3] Kent State Univ, Dept Chem & Biochem, Kent, OH 44242 USA
[4] King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2016年 / 199卷
基金：
中国国家自然科学基金;
关键词：
Catalytic oxidation; Adsorption; Formaldehyde removal; Nanostructured catalyst; MICROEMULSION-ASSISTED SYNTHESIS; SUPPORTED GOLD CATALYSTS; AMBIENT-TEMPERATURE; EFFICIENT REMOVAL; GASEOUS FORMALDEHYDE; PHOTOCATALYTIC DEGRADATION; OXIDE; TIO2; NANOPARTICLES; PT/TIO2;
D O I：
10.1016/j.apcatb.2016.06.052
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 CeO2/AlOOH-supported Pt catalyst was prepared by combining the microemulsion-assisted synthesis of AlOOH. and CeO2 hybrid with NaBH4-reduction of Pt precursor. The as-prepared catalyst obtained by depositing Pt nanoparticles on the CeO2/AlOOH (1:9 molar ratio) support (Pt/Al9Ce1) exhibited a remarkable catalytic activity and stability for, oxidative removal-of formaldehyde (HCHO) vapor at room temperature. The excellent performance of Pt/Al9Ce1 catalyst could be attributed to the abundance of surface hydroxyls, oxygen storage in CeO2, high dispersion of Pt nanoparticles, and excellent adsorption performarice of AlOOH. The mechanism of HCHO decomposition was investigated with respect to the behavior of adsorbed intermediates on the Pt/Al9Ce1 surface at room temperature using in situ DRIFTS. The results suggest that the main species formed on the surface during HCHO oxidation are the reaction intermediates, which could, be directly oxidized to CO2 in the presence of O-2. By taking advantage of high adsorption affinity of AlOOH nanoflakes toward HCHO, reducible ceria nanoparticles and excellent catalytic activity of Pt nanoparticles toward HCHO oxidation, it was possible to design a superior nanostructured catalyst for room temperature decomposition of HCHO. This strategy can be also applied to fabricate novel nanostructured catalysts for advanced applications such as environmental remediation. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：458 / 465
页数：8
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