Interfacial oxygen vacancies at Co3O4-CeO2 heterointerfaces boost the catalytic reduction of NO by CO in the presence of O2

Co Single Atoms and CoOx Nanoclusters Anchored on Ce0.75Zr0.25O2 Synergistically Boosts the NO Reduction by CO

“…The electron paramagnetic resonance (EPR) analysis (Figure S20, Supporting Information) shows that Co SA +CoO x NC /CZO has the strongest two signals ( g ⊥ = 1.960 and g ∥ = 1.940) among all the catalysts (Figure S20a, Supporting Information), ascribed to Ce 3+ ‐O − ‐Ce 4+ ‐type defect sites. [ 21,53 ] In addition, the signal of O 2 − species (g ∥ = 2.035 and g ⊥ = 2.003), associated with Co 2+ of CoO x (Figure S20b, Supporting Information), becomes wider for CoO x NC /CZO and Co SA +CoO x NC /CZO, indicating the existence of the CoO x cluster species in these two catalysts. [ 54 ] Two signals at g = 2.085 and g = 2.149 are ascribed to the presence of Ce 3+ ions and Co ions combined with OVs, respectively (Figure S20c, Supporting Information).…”

“…[ 20 ] In our previous work, the Co 3 O 4 ‐CeO 2 catalyst possessing abundant interfacial oxygen vacancies (OVs) achieved 100% NO conversion at 200 °C in the presence of 5 vol% O 2 . [ 21 ] However, Co‐based catalysts suitable for CO‐SCR under O 2 ‐containing conditions and a deep understanding of their active site structures are still lacking and should be explored further.…”

Simultaneous Photodeposition of an Ag–Co Cocatalyst in Different pH Conditions To Improve the Activity of Calcium Titanate Photocatalyst for Carbon Dioxide Reduction with Water

“…It means that the amount of O 2 evolution is lower than the ideal ratio. This is due to the production of another oxidation product, such as H 2 O 2 . ,, It was detected as shown in Figure S14, where a small amount of H 2 O 2 was generated, 0.02 mM (7.2 μmol). Since recalculation with the amount of accumulated H 2 O 2 gives R = 1.1, which is close to 1.0, it has been proved that a small amount of the holes oxidized the water to form H 2 O 2 in the solution as another oxidation reaction.…”

Stability challenges and prospects for the industrial application of non‐noble catalysts for selective catalytic reduction of NOx by CO (CO‐SCR)

“…[61] Copyright 2023, Elsevier B.V.. milling treatment, have been proven to substantially elevate the water tolerance of catalyst. [63] 5. The inhibition of O 2…”