Pt supported on long-rod β-FeOOH as an efficient catalyst for HCHO oxidation at ambient temperature

被引：23
作者：
Chen, Jiashu [1 ,2 ]
Ding, Junjie [1 ]
Li, Hongqi [2 ]
Sun, Jinfang [3 ]
Rui, Zebao [4 ]
Ji, Hongbing [1 ,2 ]
机构：
[1] Sun Yat Sen Univ, Fine Chem Res Inst, Sch Chem, Guangzhou 510275, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, Huizhou Res Inst, R&D Ctr Waste Gas Cleaning & Control, Huizhou 516081, Peoples R China
[3] Nanjing Univ, Jiangsu Key Lab Vehicle Emiss Control, Ctr Modern Anal, Nanjing 210093, Jiangsu, Peoples R China
[4] Sun Yat Sen Univ, Sch Chem Engn & Technol, Zhuhai 519082, Peoples R China
来源：
CATALYSIS SCIENCE & TECHNOLOGY | 2019年 / 9卷 / 12期
基金：
中国国家自然科学基金;
关键词：
FORMALDEHYDE OXIDATION; PERFORMANCE; REMOVAL; ADSORPTION; MECHANISM; OXIDE; IDENTIFICATION; DECOMPOSITION; NANOPARTICLES; NANOFLAKES;
D O I：
10.1039/c9cy00521h
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：
The physicochemical properties of surface hydroxyls have significant effects on the performance of HCHO oxidation catalysts. Herein, we report a method for modulating the properties of surface hydroxyls by changing the morphology of akaganeite (beta-FeOOH) in Pt/FeOOH catalysts, and found that the Pt particles supported on long-rod beta-FeOOH (Pt/FeOOH-LR) enclosed mainly by (010) and (001) planes exhibited better activity than those supported on short-rod or particle beta-FeOOH (enclosed mainly by (001) and (100) planes). HCHO could be completely eliminated with an inlet concentration of 50 ppm at ambient temperature at a GHSV of 24 000 mL g(-1) h(-1) over Pt/FeOOH-LR. The use of long-rod beta-FeOOH support improved the concentration of surface hydroxyls and enhanced the reducibility of Pt particles. The mechanism study by in situ DRIFTS and HCHO-TPSR indicated that the surface hydroxyls in Pt/FeOOH-LR could facilitate strong HCHO adsorption and are more active towards the surface formate oxidation. This strategy of modulating the properties of surface hydroxyls by shape engineering can be applied to develop novel catalysts for the hydroxyl-involved reactions.
引用
收藏
页码：3287 / 3294
页数：8
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