TY - JOUR
T1 - Design of N-Coordinated Dual-Metal Sites
T2 - A Stable and Active Pt-Free Catalyst for Acidic Oxygen Reduction Reaction
AU - Wang, Jing
AU - Huang, Zhengqing
AU - Liu, Wei
AU - Chang, Chunran
AU - Tang, Haolin
AU - Li, Zhijun
AU - Chen, Wenxing
AU - Jia, Chunjiang
AU - Yao, Tao
AU - Wei, Shiqiang
AU - Wu, Yuen
AU - Li, Yadong
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/12/6
Y1 - 2017/12/6
N2 - We develop a host-guest strategy to construct an electrocatalyst with Fe-Co dual sites embedded on N-doped porous carbon and demonstrate its activity for oxygen reduction reaction in acidic electrolyte. Our catalyst exhibits superior oxygen reduction reaction performance, with comparable onset potential (Eonset, 1.06 vs 1.03 V) and half-wave potential (E1/2, 0.863 vs 0.858 V) than commercial Pt/C. The fuel cell test reveals (Fe,Co)/N-C outperforms most reported Pt-free catalysts in H2/O2 and H2/air. In addition, this cathode catalyst with dual metal sites is stable in a long-term operation with 50 000 cycles for electrode measurement and 100 h for H2/air single cell operation. Density functional theory calculations reveal the dual sites is favored for activation of O-O, crucial for four-electron oxygen reduction.
AB - We develop a host-guest strategy to construct an electrocatalyst with Fe-Co dual sites embedded on N-doped porous carbon and demonstrate its activity for oxygen reduction reaction in acidic electrolyte. Our catalyst exhibits superior oxygen reduction reaction performance, with comparable onset potential (Eonset, 1.06 vs 1.03 V) and half-wave potential (E1/2, 0.863 vs 0.858 V) than commercial Pt/C. The fuel cell test reveals (Fe,Co)/N-C outperforms most reported Pt-free catalysts in H2/O2 and H2/air. In addition, this cathode catalyst with dual metal sites is stable in a long-term operation with 50 000 cycles for electrode measurement and 100 h for H2/air single cell operation. Density functional theory calculations reveal the dual sites is favored for activation of O-O, crucial for four-electron oxygen reduction.
UR - https://www.scopus.com/pages/publications/85037524569
U2 - 10.1021/jacs.7b10385
DO - 10.1021/jacs.7b10385
M3 - 文章
C2 - 29135246
AN - SCOPUS:85037524569
SN - 0002-7863
VL - 139
SP - 17281
EP - 17284
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 48
ER -