1 research outputs found
Enhanced Performance of NaOH-Modified Pt/TiO<sub>2</sub> toward Room Temperature Selective Oxidation of Formaldehyde
Pt/TiO<sub>2</sub> catalysts with various Pt loadings (0.05–2
wt %) were prepared by a combined NaOH-assisted impregnation of titania
with Pt precursor and NaBH<sub>4</sub>-reduction. The thermal catalytic
activity was evaluated toward catalytic decomposition of formaldehyde
(HCHO) vapor in the presence of toluene under ambient conditions.
HCHO could be selectively oxidized into CO<sub>2</sub> and H<sub>2</sub>O over Pt/TiO<sub>2</sub> catalysts and toluene had no change. Pt/TiO<sub>2</sub> catalysts prepared with the assistance of NaOH showed higher
HCHO oxidation activity than those without NaOH due to the introduction
of additional surface hydroxyl groups, the enhanced adsorption capacity
toward HCHO, and larger mesopores and macropores facilitating diffusion
and transport of reactants and products. The as-prepared Pt/TiO<sub>2</sub> catalysts with an optimal Pt loading of 1 wt % exhibited
high catalytic stability. Considering the versatile combination of
noble-metal nanoparticles and supports, this work will provide new
insights to the design of high-performance catalysts for indoor air
purification