Superior catalytic performance within H2O-vapor of W-modified CoMn2O4/TiO2 catalyst for selective catalytic reduction of NOx with NH3

Unravelling the Role of Zr–Laponite Supports in Enhancing the Activity of a MnNi Catalyst for the Low-Temperature NH3-Selective Catalytic Reduction Reaction

“…Notably, Mn 3+ and Mn 4+ are SCR active sites that play a crucial role in the adsorption and activation of different reactant species by facilitating catalytic cycles via the conversion of Mn 3+ and Mn 4+ and vice versa and improving the overall catalytic performance. 39 Moreover, two peaks at 182.1 and 184.4 eV were observed in the Zr 3d XPS spectra (Figure 4d). We evaluated the durability of MnNi/Zr−Laponite(3) for potential commercial applications at 220 °C for 8 h. The catalyst demonstrated reproducibility over 6 consecutive runs with no significant decline in the deNO x activity (Figure 5b).…”

“…This was due to the increased index of electron relocation from the Ni to Mn atoms on the catalyst. Notably, Mn 3+ and Mn 4+ are SCR active sites that play a crucial role in the adsorption and activation of different reactant species by facilitating catalytic cycles via the conversion of Mn 3+ and Mn 4+ and vice versa and improving the overall catalytic performance . Moreover, two peaks at 182.1 and 184.4 eV were observed in the Zr 3d XPS spectra (Figure d).…”

Research Progress on Preparation of Metal Oxide Catalysts with Porous Structure and Their Catalytic Purification of Diesel Engine Exhausts Gases

“…In situ DRIFT analysis showed that the adsorbed NH 3 species bound to Lewis acid sites and bidentate nitrates play a more important role in SCR performance, and the reaction mechanism over the catalysts follows both Langmuir−Hinshelwood and Eley−Rideal mechanisms, with the latter mechanism playing a dominant role. Subsequently, Liu et al 366…”

“…In situ DRIFT analysis showed that the adsorbed NH 3 species bound to Lewis acid sites and bidentate nitrates play a more important role in SCR performance, and the reaction mechanism over the catalysts follows both Langmuir–Hinshelwood and Eley–Rideal mechanisms, with the latter mechanism playing a dominant role. Subsequently, Liu et al synthesized CoMn 2 O 4 /W–TiO 2 catalysts by introducing tungsten (W) as a promoter on the basis of CoMn 2 O 4 /TiO 2 catalysts. Studies have shown that the doping of W forms a mesoporous structure in the catalyst, which promotes the diffusion of gas molecules.…”

Hollow Cu2O@CoMn2O4 Nanoreactors for Electrochemical NO Reduction to NH3: Elucidating the Void‐Confinement Effects on Intermediates

“…[14,15] Nevertheless, the void-confinement effect of hollow nanoreactors on reaction intermediates still lacks experimental evidence. Meanwhile, compared with selective catalytic reduction (SCR) for NO removal, [16][17][18] electrochemical NO reduction to NH 3 (ENOR), a "one-stone-two -birds" strategy, is of significance in environmental remediation and energy storage. [19][20][21] Unfortunately, nanoreactors with hollow structures have never been reported for ENOR.…”