Promoting Metal–Support Interaction on Pt/TiO₂ Catalyst by Antimony for Enhanced Carbon Monoxide Oxidation Activity at Room Temperature

Abstract

In this study, Pt/TiO2-R catalytic activity during carbon monoxide (CO) oxidation at room temperature (25 °C) was enhanced by the addition of antimony (Sb) as a promoter. Antimony increases the surface oxygen of TiO2, which causes the large amounts of oxygen vacancies at reduction condition. Metallic Pt sites that come into contact with oxygen vacancies cause significant electron donation between the metal and support to facilitate metal–support interaction effect. The improved metal–support interaction effect increased the electron density on the Pt sites of Pt/Sb/TiO2-R, and the redox properties were enhanced owing to the unstable surface state. In the results, CO oxidation activity and durability of Pt/Sb/TiO2-R were improved than Pt/TiO2-R by enhanced oxygen mobility at room temperature.

Insight into the LED-assisted deposition of platinum nanoparticles on the titania surface: understanding the effect of LEDs

“…5c) samples. Moreover, according to the available literature, platinum particles obtained by photodeposition can also be observed in the form of dark areas on single crystals of the base material-which is also observed in our research [36][37][38] . Nevertheless, the Pt content determined based on EDXRF analysis was close to the assumed theoretical values and ranged from 0.8 to 1.1% by weight.…”

Ultra-Small Pt–Ni Bimetallic Nanoparticles Confined in Dendritic Mesoporous Silica with Remarkable CO Catalytic Oxidation Performance

“…CO is a harmful gas pollutant and can cause varying degrees of poisoning symptoms and endanger human health, reducing CO emissions is a pressing concern. ,, Therefore, in this work, the catalytic activity of 1% Pt x Ni 1– x /KCC-1 catalysts was examined by utilizing CO oxidation as the probe reaction. The results are given in Figure A, it can be seen that the 1% Pt/KCC-1 catalyst became active at around 100 °C, and the CO could be completely converted ( T 100 ) at 160 °C.…”

“…Noble metal nanomaterials have received great attention and have been widely studied for decades due to their excellent performance as catalysts in the chemical industry, environmental protection, and energy production. − Currently, a crucial task and a popular research field are how to construct and synthesize satisfactory catalysts with lower noble metal loadings, given the limited supply and high price of noble metals . One promising and feasible route to achieve this goal is to prepare bimetallic catalysts containing both the noble metal and transition metal, in which the transition metal not only decreases the amount of noble metal but also improves its catalytic performance.…”

Interfacial Auδ−–OV–Ti Structure Promoted C–H Bond Activation for Selective Oxidation of Fatty Alcohols to Fatty Acids

“…Specifically, the interfacial structure with rich oxygen vacancies formed on Au-based catalysts is a crucial factor in determining the oxidation performance of the catalysts due to its superior synergistic adsorption and C–H bond activation abilities (Table S1). − Based on this point, developing efficient Au-based catalysts with rich oxygen vacancies exhibits enormous potential for the improvement of the catalytic performance in the green catalytic oxidation of aliphatic alcohols to aliphatic acids.…”