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In Situ FT-IR Investigation of Methanol and CO Electrooxidation on Cubic and Octahedral/Tetrahedral Pt Nanoparticles Having Residual PVP

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Abstract

The methanol oxidation reaction (MOR) and related carbon monoxide (CO) oxidation reaction (COR) activities on the synthesized cubic and octahedral/tetrahedral (O/T) Pt nanoparticles (NPs) still having residual polyvinylpyrrolidone (PVP) were investigated using electrochemical (EC) and in situ Fourier transform infrared (FT-IR) spectroscopic measurements in both 0.1 M HClO4 and 0.1 M H2SO4. While EC measurements confirmed the enhanced MOR activity on the O/T Pt NPs as observed previously (Susut et al., Phys. Chem. Chem. Phys. 10:3712, 6), the in situ IR measurements showed much improved data quality as compared to the previous studies and provided strong indications that the underlying reason for the observed MOR enhancement on the O/T Pt NPs was highly likely related to the enhanced no-CO-generating reaction pathway(s), as evidenced by much lower CO generation during the MOR on these Pt NPs.

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Acknowledgments

This work was partially supported by the IRES/DDEP Program (OISE-1130454) and the IMI Program (DMR-0843934) under the NSF. Sun Group’s research is funded through the NSFC (20921120405, 21021002), and research in the Tong Group is supported by the NSF (CHE-0923910) and DOE (DE-FG02-07ER15895). AMH acknowledges the assistance and guidance from the Sun Group, specifically that of Mr. Jian-Long Lin, Ms. Huang Rui, and Mr. Han Jin in FT-IR, TEM, and electrochemical experimentation, respectively. AMH also thanks Dr. Oksana Zaluzhna of the Tong Group for TGA analysis and the Swift Group at the Georgetown University for the use of their TGA instrument.

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Authors and Affiliations

  1. Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, DC, 20057, USA

    Augusta M. Levendorf & YuYe J. Tong

  2. Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen, 361005, People’s Republic of China

    Augusta M. Levendorf & Shi-Gang Sun

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  1. Augusta M. Levendorf
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  2. Shi-Gang Sun
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Correspondence to Shi-Gang Sun or YuYe J. Tong.

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Levendorf, A.M., Sun, SG. & Tong, Y.J. In Situ FT-IR Investigation of Methanol and CO Electrooxidation on Cubic and Octahedral/Tetrahedral Pt Nanoparticles Having Residual PVP. Electrocatalysis 5, 248–255 (2014). https://doi.org/10.1007/s12678-014-0186-1

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