TY - JOUR
T1 - Platinum-gold nanoparticles
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.
UR - http://www.scopus.com/inward/record.url?scp=77955738865&partnerID=8YFLogxK
U2 - 10.1021/ja1036572
DO - 10.1021/ja1036572
M3 - Article
C2 - 20527774
AN - SCOPUS:77955738865
SN - 0002-7863
VL - 132
SP - 12170
EP - 12171
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 35
ER -