Platinum-gold nanoparticles: A highly active bifunctional electrocatalyst for rechargeable lithium-air batteries

Yi Chun Lu; Zhichuan Xu; Hubert A. Gasteiger; Shuo Chen; Kimberly Hamad-Schifferli; Yang Shao-Horn

doi:10.1021/ja1036572

Platinum-gold nanoparticles: A highly active bifunctional electrocatalyst for rechargeable lithium-air batteries

Yi Chun Lu, Zhichuan Xu, Hubert A. Gasteiger, Shuo Chen, Kimberly Hamad-Schifferli, Yang Shao-Horn^*

^*Corresponding author for this work

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

1189 Citations (Scopus)

Abstract

PtAu nanoparticles (NPs) were shown to strongly enhance the kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable Li-O₂ cells. Li-O₂ cells with PtAu/C were found to exhibit the highest round-trip efficiency reported to date. During ORR via xLi⁺ + O₂ + xe^- → Li_xO ₂, the discharge voltage with PtAu/C was considerably higher than that of pure carbon and comparable to that of Au/C. During OER via Li _xO₂ → xLi⁺ + O₂ + xe ^-, the charge voltages with PtAu/C fell in the range from 3.4 to 3.8 V_Li, which is slightly lower than obtained with Pt. It is hypothesized that PtAu NPs exhibit bifunctional catalytic activity, having surface Au and Pt atoms primarily responsible for ORR and OER kinetics in Li-O₂ cells, respectively.

Original language	English
Pages (from-to)	12170-12171
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	132
Issue number	35
DOIs	https://doi.org/10.1021/ja1036572
Publication status	Published - Sept 8 2010
Externally published	Yes

ASJC Scopus Subject Areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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title = "Platinum-gold nanoparticles: A highly active bifunctional electrocatalyst for rechargeable lithium-air batteries",

abstract = "PtAu nanoparticles (NPs) were shown to strongly enhance the kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable Li-O2 cells. Li-O2 cells with PtAu/C were found to exhibit the highest round-trip efficiency reported to date. During ORR via xLi+ + O2 + xe- → LixO 2, the discharge voltage with PtAu/C was considerably higher than that of pure carbon and comparable to that of Au/C. During OER via Li xO2 → xLi+ + O2 + xe -, the charge voltages with PtAu/C fell in the range from 3.4 to 3.8 VLi, which is slightly lower than obtained with Pt. It is hypothesized that PtAu NPs exhibit bifunctional catalytic activity, having surface Au and Pt atoms primarily responsible for ORR and OER kinetics in Li-O2 cells, respectively.",

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T2 - A highly active bifunctional electrocatalyst for rechargeable lithium-air batteries

AU - Lu, Yi Chun

AU - Xu, Zhichuan

AU - Gasteiger, Hubert A.

AU - Chen, Shuo

AU - Hamad-Schifferli, Kimberly

AU - Shao-Horn, Yang

PY - 2010/9/8

Y1 - 2010/9/8

N2 - PtAu nanoparticles (NPs) were shown to strongly enhance the kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable Li-O2 cells. Li-O2 cells with PtAu/C were found to exhibit the highest round-trip efficiency reported to date. During ORR via xLi+ + O2 + xe- → LixO 2, the discharge voltage with PtAu/C was considerably higher than that of pure carbon and comparable to that of Au/C. During OER via Li xO2 → xLi+ + O2 + xe -, the charge voltages with PtAu/C fell in the range from 3.4 to 3.8 VLi, which is slightly lower than obtained with Pt. It is hypothesized that PtAu NPs exhibit bifunctional catalytic activity, having surface Au and Pt atoms primarily responsible for ORR and OER kinetics in Li-O2 cells, respectively.

AB - PtAu nanoparticles (NPs) were shown to strongly enhance the kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable Li-O2 cells. Li-O2 cells with PtAu/C were found to exhibit the highest round-trip efficiency reported to date. During ORR via xLi+ + O2 + xe- → LixO 2, the discharge voltage with PtAu/C was considerably higher than that of pure carbon and comparable to that of Au/C. During OER via Li xO2 → xLi+ + O2 + xe -, the charge voltages with PtAu/C fell in the range from 3.4 to 3.8 VLi, which is slightly lower than obtained with Pt. It is hypothesized that PtAu NPs exhibit bifunctional catalytic activity, having surface Au and Pt atoms primarily responsible for ORR and OER kinetics in Li-O2 cells, respectively.

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Platinum-gold nanoparticles: A highly active bifunctional electrocatalyst for rechargeable lithium-air batteries

Abstract

ASJC Scopus Subject Areas

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