Atomic‐Scale Insights into the Low‐Temperature Oxidation of Methanol over a Single‐Atom Pt₁‐Co₃O₄ Catalyst

Abstract

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Stabilizing platinum atoms on CeO2 oxygen vacancies by metal-support interaction induced interface distortion: Mechanism and application

“…The confirmation of meth-oxyl groups (−CH3O) was centered at 1021 or 1033 cm -1 , primarily coming from the OeH bond activation over the active interface [67][68][69]. The stretching of −CH2O groups was formed due to the breakage of C-H bond over methoxyl, which is in line with our previous study [12]. However, the monitored peaks appearing at a relative low temperature around 1060-1090 cm -1 are indicative of a bridging mode of asymmetrical carbonyl (-C = O) groups, which evidently vanishes with temperature increasing [68,69].…”

Unravelling High Water Vapor-Induced Inhibitory Effects on Pt/Co3O4 Catalysts toward Benzene Oxidation

“…was tripled to 3 vol %, verifying that water vapor considerably impairs catalytic activity even with the use of appreciable Pt-based catalysts. Similar results were also reported by Jiang et al,27 in the presence of 3 vol % of water vapor where the methanol conversion reduced about 15.0% for the single-atomic Pt 1 −Co 3 O 4 catalyst and up to 18.0% conversion rate was lost for the Pt/Co 3 O 4 catalyst.…”

Synergistic Chemistry Between Supported Platinum Atoms and Nanoclusters in Hydrocarbon Oxidation

“…[4] We have previously identified that the positively charged Pt atoms are highly effective at activating organic hydrocarbons, but they cannot co-activate the adsorbed oxygen species due to its size effect, resulting in a lower selectivity of harmless total oxidation products. [5] In contrary, some previous studies highlighted the superior ability of Pt nanoclusters to adsorb and activate adsorbed O 2 molecules, even in the presence of strong adsorbates, [6] which can also be confirmed by our density functional theory (DFT) studies (Figure S1, Supporting Information). It is therefore logical to hypothesize that a catalyst possessing both of these species (atoms and nanoclusters) might be highly effective in total oxidation reactions.…”