Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation

Jin Suntivich; Zhichuan Xu; Christopher E. Carlton; Junhyung Kim; Binghong Han; Seung Woo Lee; Nicéphore Bonnet; Nicola Marzari; Lawrence F. Allard; Hubert A. Gasteiger; Kimberly Hamad-Schifferli; Yang Shao-Horn

doi:10.1021/ja402072r

Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation

Jin Suntivich, Zhichuan Xu, Christopher E. Carlton, Junhyung Kim, Binghong Han, Seung Woo Lee, Nicéphore Bonnet, Nicola Marzari, Lawrence F. Allard, Hubert A. Gasteiger, Kimberly Hamad-Schifferli, Yang Shao-Horn

Nuclear Energy Materials Microanalysis

Research output: Contribution to journal › Article › peer-review

283 Scopus citations

Abstract

The ability to direct bimetallic nanoparticles to express desirable surface composition is a crucial step toward effective heterogeneous catalysis, sensing, and bionanotechnology applications. Here we report surface composition tuning of bimetallic Au-Pt electrocatalysts for carbon monoxide and methanol oxidation reactions. We establish a direct correlation between the surface composition of Au-Pt nanoparticles and their catalytic activities. We find that the intrinsic activities of Au-Pt nanoparticles with the same bulk composition of Au_0.5Pt_0.5 can be enhanced by orders of magnitude by simply controlling the surface composition. We attribute this enhancement to the weakened CO binding on Pt in discrete Pt or Pt-rich clusters surrounded by surface Au atoms. Our finding demonstrates the importance of surface composition control at the nanoscale in harnessing the true electrocatalytic potential of bimetallic nanoparticles and opens up strategies for the development of highly active bimetallic nanoparticles for electrochemical energy conversion.

Original language	English
Pages (from-to)	7985-7991
Number of pages	7
Journal	Journal of the American Chemical Society
Volume	135
Issue number	21
DOIs	https://doi.org/10.1021/ja402072r
State	Published - May 29 2013

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Suntivich, J., Xu, Z., Carlton, C. E., Kim, J., Han, B., Lee, S. W., Bonnet, N., Marzari, N., Allard, L. F., Gasteiger, H. A., Hamad-Schifferli, K., & Shao-Horn, Y. (2013). Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation. Journal of the American Chemical Society, 135(21), 7985-7991. https://doi.org/10.1021/ja402072r

@article{92eafab780254481911d14cba96c9e92,

title = "Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation",

abstract = "The ability to direct bimetallic nanoparticles to express desirable surface composition is a crucial step toward effective heterogeneous catalysis, sensing, and bionanotechnology applications. Here we report surface composition tuning of bimetallic Au-Pt electrocatalysts for carbon monoxide and methanol oxidation reactions. We establish a direct correlation between the surface composition of Au-Pt nanoparticles and their catalytic activities. We find that the intrinsic activities of Au-Pt nanoparticles with the same bulk composition of Au0.5Pt0.5 can be enhanced by orders of magnitude by simply controlling the surface composition. We attribute this enhancement to the weakened CO binding on Pt in discrete Pt or Pt-rich clusters surrounded by surface Au atoms. Our finding demonstrates the importance of surface composition control at the nanoscale in harnessing the true electrocatalytic potential of bimetallic nanoparticles and opens up strategies for the development of highly active bimetallic nanoparticles for electrochemical energy conversion.",

author = "Jin Suntivich and Zhichuan Xu and Carlton, {Christopher E.} and Junhyung Kim and Binghong Han and Lee, {Seung Woo} and Nic{\'e}phore Bonnet and Nicola Marzari and Allard, {Lawrence F.} and Gasteiger, {Hubert A.} and Kimberly Hamad-Schifferli and Yang Shao-Horn",

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doi = "10.1021/ja402072r",

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Suntivich, J, Xu, Z, Carlton, CE, Kim, J, Han, B, Lee, SW, Bonnet, N, Marzari, N, Allard, LF, Gasteiger, HA, Hamad-Schifferli, K & Shao-Horn, Y 2013, 'Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation', Journal of the American Chemical Society, vol. 135, no. 21, pp. 7985-7991. https://doi.org/10.1021/ja402072r

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T1 - Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation

AU - Suntivich, Jin

AU - Xu, Zhichuan

AU - Carlton, Christopher E.

AU - Kim, Junhyung

AU - Han, Binghong

AU - Lee, Seung Woo

AU - Bonnet, Nicéphore

AU - Marzari, Nicola

AU - Allard, Lawrence F.

AU - Gasteiger, Hubert A.

AU - Hamad-Schifferli, Kimberly

AU - Shao-Horn, Yang

PY - 2013/5/29

Y1 - 2013/5/29

N2 - The ability to direct bimetallic nanoparticles to express desirable surface composition is a crucial step toward effective heterogeneous catalysis, sensing, and bionanotechnology applications. Here we report surface composition tuning of bimetallic Au-Pt electrocatalysts for carbon monoxide and methanol oxidation reactions. We establish a direct correlation between the surface composition of Au-Pt nanoparticles and their catalytic activities. We find that the intrinsic activities of Au-Pt nanoparticles with the same bulk composition of Au0.5Pt0.5 can be enhanced by orders of magnitude by simply controlling the surface composition. We attribute this enhancement to the weakened CO binding on Pt in discrete Pt or Pt-rich clusters surrounded by surface Au atoms. Our finding demonstrates the importance of surface composition control at the nanoscale in harnessing the true electrocatalytic potential of bimetallic nanoparticles and opens up strategies for the development of highly active bimetallic nanoparticles for electrochemical energy conversion.

AB - The ability to direct bimetallic nanoparticles to express desirable surface composition is a crucial step toward effective heterogeneous catalysis, sensing, and bionanotechnology applications. Here we report surface composition tuning of bimetallic Au-Pt electrocatalysts for carbon monoxide and methanol oxidation reactions. We establish a direct correlation between the surface composition of Au-Pt nanoparticles and their catalytic activities. We find that the intrinsic activities of Au-Pt nanoparticles with the same bulk composition of Au0.5Pt0.5 can be enhanced by orders of magnitude by simply controlling the surface composition. We attribute this enhancement to the weakened CO binding on Pt in discrete Pt or Pt-rich clusters surrounded by surface Au atoms. Our finding demonstrates the importance of surface composition control at the nanoscale in harnessing the true electrocatalytic potential of bimetallic nanoparticles and opens up strategies for the development of highly active bimetallic nanoparticles for electrochemical energy conversion.

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JO - Journal of the American Chemical Society

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Surface composition tuning of Au-Pt bimetallic nanoparticles for enhanced carbon monoxide and methanol electro-oxidation

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