TY - JOUR
T1 - High-performance transition metal-doped Pt3Ni octahedra for oxygen reduction reaction
AU - Huang, Xiaoqing
AU - Zhao, Zipeng
AU - Cao, Liang
AU - Chen, Yu
AU - Zhu, Enbo
AU - Lin, Zhaoyang
AU - Li, Mufan
AU - Yan, Aiming
AU - Zettl, Alex
AU - Wang, Y. Morris
AU - Duan, Xiangfeng
AU - Mueller, Tim
AU - Huang, Yu
PY - 2015/6/12
Y1 - 2015/6/12
N2 - Bimetallic platinum-nickel (Pt-Ni) nanostructures represent an emerging class of electrocatalysts for oxygen reduction reaction (ORR) in fuel cells, but practical applications have been limited by catalytic activity and durability. We surface-doped Pt3Ni octahedra supported on carbon with transition metals, termed M-Pt3Ni/C, where M is vanadium, chromium, manganese, iron, cobalt, molybdenum (Mo), tungsten, or rhenium. The Mo-Pt3Ni/C showed the best ORR performance, with a specific activity of 10.3 mA/cm2 and mass activity of 6.98 A/mgPt, which are 81- and 73-fold enhancements compared with the commercial Pt/C catalyst (0.127 mA/cm2 and 0.096 A/mgPt). Theoretical calculations suggest that Mo prefers subsurface positions near the particle edges in vacuum and surface vertex/edge sites in oxidizing conditions, where it enhances both the performance and the stability of the Pt3Ni catalyst.
AB - Bimetallic platinum-nickel (Pt-Ni) nanostructures represent an emerging class of electrocatalysts for oxygen reduction reaction (ORR) in fuel cells, but practical applications have been limited by catalytic activity and durability. We surface-doped Pt3Ni octahedra supported on carbon with transition metals, termed M-Pt3Ni/C, where M is vanadium, chromium, manganese, iron, cobalt, molybdenum (Mo), tungsten, or rhenium. The Mo-Pt3Ni/C showed the best ORR performance, with a specific activity of 10.3 mA/cm2 and mass activity of 6.98 A/mgPt, which are 81- and 73-fold enhancements compared with the commercial Pt/C catalyst (0.127 mA/cm2 and 0.096 A/mgPt). Theoretical calculations suggest that Mo prefers subsurface positions near the particle edges in vacuum and surface vertex/edge sites in oxidizing conditions, where it enhances both the performance and the stability of the Pt3Ni catalyst.
UR - http://www.scopus.com/inward/record.url?scp=84931287931&partnerID=8YFLogxK
U2 - 10.1126/science.aaa8765
DO - 10.1126/science.aaa8765
M3 - Article
AN - SCOPUS:84931287931
SN - 0036-8075
VL - 348
SP - 1230
EP - 1234
JO - Science
JF - Science
IS - 6240
ER -