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Platinum single-atom catalysts: a comparative review towards effective characterization

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Abstract

Single-atom catalysis is a new frontier in the heterogeneous catalysis field due to its high activity and selectivity for various catalytic reactions. However, decades ago, single-atom catalysts could not be clearly visualized and characterized due to limitations associated with instrument resolution. In recent years, with the rapid development of characterization techniques, high-resolution scanning tunneling microscopy (STM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), extended X-ray absorption fine structure (EXAFS), X-ray absorption near edge structure (XANES), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), X-ray photoelectron spectroscopy (XPS), and other characterization techniques have been used to accurately represent single-atom catalysts. In this review, we discuss in depth these characterization techniques for Pt single-atom catalysts and focus on Fourier transformed EXAFS spectroscopy to study the coordination environment of Pt–M (M = Cl, O, C, N, S, Pt, Cu, Pd, Ni, Fe) for atomically dispersed Pt catalysts on diverse supports. We believe that this review will lead to better understanding of the effective characterization of Pt single-atom catalysts and promote further research on Pt single-atom catalysis in the future.

Graphical abstract: Platinum single-atom catalysts: a comparative review towards effective characterization

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Publication details

The article was received on 26 May 2019, accepted on 14 Jul 2019 and first published on 15 Jul 2019


Article type: Minireview
DOI: 10.1039/C9CY01028A
Catal. Sci. Technol., 2019, Advance Article

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    Platinum single-atom catalysts: a comparative review towards effective characterization

    Q. Liu and Z. Zhang, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01028A

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