title: Efficient decomposition of formaldehyde at room temperature over Pt/honeycomb ceramics with ultra-low Pt content.
abstract: Pt/honeycomb ceramic (Pt/HC) catalysts with ultra-low Pt content (0.005-0.055 wt%) were for the first time prepared by an impregnation of honeycomb ceramics with Pt precursor and NaBH4-reduction combined method. The microstructures, morphologies and textural properties of the resulting samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The obtained Pt/HC catalysts were used for catalytic oxidative decomposition of formaldehyde (HCHO) at room temperature. It was found that the as-prepared Pt/HC catalysts can efficiently decompose HCHO in air into CO2 and H2O at room temperature. The catalytic activity of the Pt/HC catalysts increases with increasing the Pt loading in the range of 0.005-0.013 wt%, and the further increase of the Pt loading does not obviously improve catalytic activity. From the viewpoint of cost and catalytic performance, 0.013 wt% Pt loading is the optimal Pt loading amount, and the Pt/HC catalyst with 0.013 wt% Pt loading also exhibited good catalytic stability. Considering practical applications, this work will provide new insights into the low-cost and large-scale fabrication of advanced catalytic materials for indoor air purification.
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China. jiaguoyu@yahoo.com.
authors.forename: Longhui
authors.initials: L
authors.lastname: Nie
authors.forename: Yingqiu
authors.initials: Y
authors.lastname: Zheng
authors.forename: Jiaguo
authors.initials: J
authors.lastname: Yu
mesh_terms: D002384:Catalysis; D002516:Ceramics / Q000737:chemistry* / Q000378:metabolism; D005557:Formaldehyde / Q000032:analysis* / Q000378:metabolism*; D010984:Platinum / Q000737:chemistry* / Q000378:metabolism; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D005557:Formaldehyde; D010984:Platinum