TY - JOUR
T1 - Understanding the electrocatalysis of oxygen reduction on platinum and its alloys
AU - Stephens, Ifan E. L.
AU - Bondarenko, Alexander S.
AU - Grønbjerg, Ulrik
AU - Vej-Hansen, Ulrik Grønbjerg
AU - Rossmeisl, Jan
AU - Chorkendorff, Ib
PY - 2012
Y1 - 2012
N2 - The high cost of low temperature fuel cells is to a large part dictated by the high loading of Pt required to catalyse the oxygen reduction reaction (ORR). Arguably the most viable route to decrease the Pt loading, and to hence commercialise these devices, is to improve the ORR activity of Pt by alloying it with other metals. In this perspective paper we provide an overview of the fundamentals underlying the reduction of oxygen on platinum and its alloys. We also report the ORR activity of Pt5La for the first time, which shows a 3.5- to 4.5-fold improvement in activity over Pt in the range 0.9 to 0.87 V, respectively. We employ angle resolved X-ray photoelectron spectroscopy and density functional theory calculations to understand the activity of Pt5La.
AB - The high cost of low temperature fuel cells is to a large part dictated by the high loading of Pt required to catalyse the oxygen reduction reaction (ORR). Arguably the most viable route to decrease the Pt loading, and to hence commercialise these devices, is to improve the ORR activity of Pt by alloying it with other metals. In this perspective paper we provide an overview of the fundamentals underlying the reduction of oxygen on platinum and its alloys. We also report the ORR activity of Pt5La for the first time, which shows a 3.5- to 4.5-fold improvement in activity over Pt in the range 0.9 to 0.87 V, respectively. We employ angle resolved X-ray photoelectron spectroscopy and density functional theory calculations to understand the activity of Pt5La.
U2 - 10.1039/c2ee03590a
DO - 10.1039/c2ee03590a
M3 - Journal article
VL - 5
SP - 6744
EP - 6762
JO - Energy & Environmental Science
JF - Energy & Environmental Science
SN - 1754-5692
IS - 5
ER -