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- W2775060146 abstract "Identification of size effects at an atomic level is essential for designing high-performance metal-based catalysts. Here, the performance of a series of FeOx-supported Pt catalysts with Pt as nanoparticles (Pt-NP) or single atoms (Pt-SAC) are compared for the low-temperature water-gas shift (WGS) reaction. A variety of characterization methods such as adsorption microcalorimetry, H2-TPR, in situ DRIFTS, and transient analysis of product tests were used to demonstrate that Pt nanoparticles exhibit much higher adsorption strength of CO; the adsorbed CO reacts with the OH groups, which are generated from activated H2O, to form intermediate formates that subsequently decompose to produce CO2 and H2 simultaneously. On the other hand, Pt single atoms promote the formation of oxygen vacancies on FeOx which dissociate H2O to H2 and adsorbed O that then combines with the weakly adsorbed CO on these Pt sites to produce CO2. The activation energy for the WGS reaction decreases with the downsizing of Pt species, and..." @default.
- W2775060146 created "2017-12-22" @default.
- W2775060146 creator A5017039673 @default.
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- W2775060146 date "2018-01-02" @default.
- W2775060146 modified "2023-10-15" @default.
- W2775060146 title "Identifying Size Effects of Pt as Single Atoms and Nanoparticles Supported on FeO<sub><i>x</i></sub> for the Water-Gas Shift Reaction" @default.
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- W2775060146 doi "https://doi.org/10.1021/acscatal.7b02751" @default.
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