Influence of MnO2 Morphology on the Catalytic Performance of Ag/MnO2 for the HCHO Oxidation

Boosting the Dispersity of Metallic Ag Nanoparticles and Ozone Decomposition Performance of Ag-Mn Catalysts via Manganese Vacancy-Dependent Metal–Support Interactions

“…Li et al 23 studied the effect of different morphologies (wire-like, rod-like, and tube-like) of MnO 2 on the interaction between Ag and MnO 2 and found that Ag particles on wire-like MnO 2 were homogeneously dispersed and existed as hemispherical particles because of the strong interaction between Ag particles and wire-like MnO 2 ; this was beneficial for toluene oxidation because of the enhancement of catalytic oxidation ability and the generation of more lattice oxygen. Lu et al 24 found that Ag/MnO 2 nanorods with better catalytic oxidation ability and more surface-active oxygen exhibited better activity and stability for the oxidation of HCHO than Ag/MnO 2 nanoparticles. However, the level of structural characterization in the above studies was very limited and insufficient to analyze the interaction mechanism of Ag and MnO x and its effect on the dispersion of Ag in detail.…”

MnO2-Ir Nanowires: Combining Ultrasmall Nanoparticle Sizes, O-Vacancies, and Low Noble-Metal Loading with Improved Activities towards the Oxygen Reduction Reaction

“…To further provide in-depth information into these features, the ultrasmall Ir NPs decorated onto MnO 2 nanowires by hydrogen temperature-programmed reduction was investigated, as shown in Figure 3 B. Typically, the MnO 2 reduction process to MnO can be divided into two reduction stages with Mn 2 O 3 and Mn 3 O 4 as intermediates [ 25 , 26 ]. Interestingly, the TPR profile for MnO 2 nanowires indicates an intense and main reduction peak, centered at 337 °C, which can be assigned to the reduction of Mn 4+ to Mn 3+ .…”

“…Before the H 2 -TPR measurements, the samples were heat-treated at 200 °C for 30 min under N 2 flow to remove moisture adsorbed. After cooling to room temperature, the reduction gas of 8.0% H 2 /N 2 at a flow rate of 20 mL/min was introduced, and the temperature was raised linearly to 950 °C at a heating rate of 10 [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ] Using Spectro Arcos equipment, the Ir atomic percentages were measured by inductively coupled plasma optical emission spectrometry (ICP-OES). For ICP-OES, the MnO 2 powder samples were fixed on stainless steel holders using double adhesive carbon tape.…”

One-step fabrication of electrospun flexible and hierarchically porous Pt/γ-Al2O3 nanofiber membranes for HCHO and particulate removal

“…[1][2][3][4] It is extensively regarded as a known human carcinogen. [5][6][7][8][9] Because more than 80% of the people spend their time in an indoor environment, removing indoor HCHO is of great importance to human health. Many approaches including adsorption, [10][11][12][13] photocatalysis, [14][15][16] plasma oxidation, [17][18][19] and thermal catalysis oxidation [20][21][22][23][24][25] have been adopted to eliminate indoor HCHO.…”