Engineering the oxygen vacancies enables Ni single-atom catalyst for stable and efficient C-H activation

Tuning the Micro-coordination Environment of Al in Dealumination Y Zeolite to Enhance Electron Transfer at the Cu–Mn Oxides Interface for Highly Efficient Catalytic Ozonation of Toluene at Low Temperatures

“…Generally, ozone first needs to be decomposed into active oxygen (O*) on the surface of the catalyst to participate in the degradation of VOCs in OZCO, and the oxygen vacancies in catalysts are often considered as reaction sites . O 2 -TPD can characterize the change of adsorbed oxygen (below 300 °C), surface lattice oxygen (300–550 °C), and bulk phase lattice oxygen (over 550 °C) in the material . Unlike lattice oxygen, which can only be activated at high temperature, the nature of the adsorbed oxygen may determine the ability of the catalyst to decompose ozone at low temperature .…”

“…40 O 2 -TPD can characterize the change of adsorbed oxygen (below 300 °C), surface lattice oxygen (300−550 °C), and bulk phase lattice oxygen (over 550 °C) in the material. 41 Unlike lattice oxygen, which can only be activated at high temperature, the nature of the adsorbed oxygen may determine the ability of the catalyst to decompose ozone at low temperature. 42 As shown in Figure 4a, the peak positions of Mn/Y and Mn/DY representing adsorbed oxygen are close, which implies that the extra-framework octahedrally coordinated aluminum species in zeolite do not contribute much to the activity of adsorbed oxygen.…”

Mechanism insights on single-atom catalysts for CO2conversion

“…149 Overall, the synergistic effects between Ni atoms and the O vacancy led to the outstanding performance of this catalyst for DRM. 150 Interestingly, Ni single-atom deposited on Ce-doped hydroxyapatite could resist coke formation as Ni just activates the first C–H bond of CH 4 . 151…”

“…149 Overall, the synergistic effects between Ni atoms and the O vacancy led to the outstanding performance of this catalyst for DRM. 150 Interestingly, Ni single-atom deposited on Ce-doped hydroxyapatite could resist coke formation as Ni just activates the rst C-H bond of CH 4 . 151 The single-site Ni 4 /MgO catalyst is efficient for DRM with all the reactants and intermediates adsorbed at Ni sites, suggesting that MgO does not participate in the reaction directly (Fig.…”

Hydrodeoxygenation of oleic acid over NiMo bimetallic catalysts supported on niobium phosphate

“…The stability of the Ni2Mo/NbP-3 catalyst may be attributed to the moderate acidity of NbP-3, which helps to inhibit the formation of coke 10 and the abundant oxygen vacancies (Ov) on Ni2Mo/NbP-3 can effectively remove carbon accumulation on isolated nickel atoms. 59…”