Insights into the active sites of chlorine-resistant Pt-based bimetallic catalysts for benzene oxidation

Interfacial effects in CuO/Co3O4 heterostructures enhance benzene catalytic oxidation performance

“…[8][9][10] Currently, the major challenge of catalytic combustion lies in the rational design and synthesis of catalysts with satisfactory catalytic activity and stability. [11][12][13] Precious metal-supported catalysts demonstrate overall better catalytic combustion performance for VOCs than other types of catalysts, but their application is largely hindered by the associated costs. [14][15][16] By comparison, transition metalbased catalysts provide a more economically viable solution for this purpose due to their abundance in nature, albeit with a slightly lower catalytic performance.…”

Au single atom-anchored WO3/TiO2nanotubes for the photocatalytic degradation of volatile organic compounds

“…7b and d). A summary of the assigned IR modes to different functional groups is given in Table S5 † 46–49 . Among them, the bands at 1610, 1599, 1500 and 1492 cm −1 were assigned to the skeleton stretching and bending vibrations of the aromatic ring.…”

Nanotubular OMS-2 Supported Single-Atom Platinum Catalysts Highly Active for Benzene Oxidation

“…The TOF Pt was calculated according to the equation TOF Pt = (C benzene × X benzene × V gas )/(n × D Pt ), and specific reaction rate (r) was calculated according to the following equation r = (C benzene × X benzene × V gas )/(n × M Pt ), where C benzene (%) is the concentration of the reactant gas, X benzene is the benzene conversion, V gas (mol s −1 ) is the total molar flow rate, n (mol) is the molar amount of Pt in the catalyst, M Pt is the molar weight of Pt, and D Pt is the Pt dispersion. 23 As listed in Table 4, the specific reaction rate at 180 °C or TOF Pt at 180 °C decreased in a sequence of 0.0121Pt 1 /OMS-2 > 0.0383Pt 1 /OMS-2 > 0.0900Pt NP /OMS-2, in which the 0.0121Pt 1 /OMS-2 sample exhibited the highest specific reaction rate (62.1 × 10 −5 mol g Pt −1 s −1 ) and the highest TOF Pt (166.2 × 10 −3 s −1 ), a result possibly due to its lowest single-atom Pt loading. The E a value for benzene oxidation decreased in the order of OMS-2 (97.2 kJ/mol) > 0.0121Pt 1 /OMS-2 (51.3 kJ/mol) > 0.0900Pt NP /OMS-2 (50.1 kJ/mol) > 0.0383Pt 1 /OMS-2 (41.8 kJ/mol).…”

“…Catalyst Characterization. Physicochemical properties of all of the samples were characterized by means of techniques such as ICP-AES, chemisorption (for metal dispersion measurement), X-ray diffraction (XRD), transmission electron microscopy (TEM), elemental mapping, highangle annular dark field-scanning transmission electron microscopy (HAADF-STEM), nitrogen adsorption−desorption (BET), X-ray photoelectron spectroscopy (XPS), temperature-programmed desorption of benzene (benzene-TPD), temperature-programmed surface reaction of benzene (benzene-TPSR), hydrogen temperature-programmed reduction (H 2 -TPR), and in situ reflectance Fourier transform infrared 21,23 To avoid the hot spots, 50 mg of the sample (40−60 mesh) was diluted with 0.25 g of quartz sands (40−60 mesh). Prior to the measurement, the sample was treated in O 2 (flow rate = 20 mL min −1 ) at 250 °C for 1 h. After being cooled to a given temperature, the benzene-containing reactant gas mixture was passed through the catalyst bed.…”