Bimetallic nickel molybdate supported Pt catalyst for efficient removal of formaldehyde at low temperature


Zhihua Xu , Gang Huang , Zhaoxiong Yan , Shuyuan Liu , Tingting Luo , Liang An

DOI:10.1016/j.jes.2019.06.005

Received January 27, 2019,Revised , Accepted June 03, 2019, Available online June 12, 2019

Volume 32,2020,Pages 173-183

Efficient removal of formaldehyde from indoor environments is of significance for human health. In this work, a typical binary transition metal oxide that could provide various oxidation states, β-NiMoO4, was employed as a support to immobilize the active Pt component (Pt/NiMoO4) for catalytic formaldehyde elimination at low ambient temperature (15°C). The results showed that the hydrothermal preparation temperature and time had a noticeable impact on the morphology and catalytic activity of the samples. The catalyst prepared with hydrothermal temperature of 150°C for 4 hr (Pt-150-4) exhibited superior catalytic activity and stability mainly due to its distinctly porous structure, relative abundance of adsorbed surface hydroxyls/water, and high oxidation ability, which resulted from the interaction of Pt with Ni and Mo of the bimetallic NiMoO4 support. Our results might shed light on the rational design of multifunctional catalysts for removal of indoor air pollutants at low ambient temperature.

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