Highly Active Mesoporous Ferrihydrite Supported Pt Catalyst for Formaldehyde Removal at Room Temperature

Abstract

Ferrihydrite (Fh) supported Pt (Pt/Fh) catalyst was first prepared by combining microemulsion and NaBH4 reduction methods and investigated for room-temperature removal of formaldehyde (HCHO). It was found that the order of addition of Pt precursor and ferrihydrite in the preparation process has an important effect on the microstructure and performance of the catalyst. Pt/Fh was shown to be an efficient catalyst for complete oxidation of HCHO at room temperature, featuring higher activity than magnetite supported Pt (Pt/Fe3O4). Pt/Fh and Pt/Fe3O4 exhibited much higher catalytic activity than Pt supported over calcined Fh and TiO2. The abundance of surface hydroxyls, high Pt dispersion and excellent adsorption performance of Fh are responsible for superior catalytic activity and stability of the Pt/Fh catalyst. This work provides some indications into the design and fabrication of the cost-effective and environmentally benign catalysts with excellent adsorption and catalytic oxidation performances for HCHO removal at room temperature.

Magnetic pyrite cinder as an efficient heterogeneous ozonation catalyst and synergetic effect of deposited Ce

“…Impregnation time, calcination temperature and calcination time are three critical parameters for the preparation of modified metal oxides and mixed metal oxides [Yan et al, 2015;Lei et al, 2015]. Hence, these preparation conditions were optimized and the results are shown in Table 1.…”

Platinum Deposited on Carbon Supports for the Complete Detoxification of Formaldehyde at Room Temperature under Humid Conditions

“…[20,22,[30][31][32][33][34] However, all of them are only long-time active at temperatures well above room temperature. The most effective way to circumvent this issue is doping with noble metals such as platinum [25][26][27][28][29]31,21,32,50,[35][36][37][38][39] or silver. [24,30,32] Here we note that platinum demonstrates a huge potential as active material for the oxidative removal of HCHO.…”

Efficient removal of gaseous formaldehyde in air using hierarchical titanate nanospheres with in situ amine functionalization

“…In particular, formaldehyde (HCHO) is the most common VOC and is considered as the major indoor air pollutant. [13][14][15][16][17][18][19][20][21][22][23] Among them, adsorption is a widely used promising technique because of its low cost, high efficiency, and easy operation. 6,7 So, it is highly urgent to take measures to remove HCHO from indoor air.…”