TY - JOUR
T1 - PEFC electrocatalysts supported on Nb-SnO2 for MEAs with high activity and durability
T2 - Part II. Application of bimetallic Pt-alloy catalysts
AU - Matsumoto, S.
AU - Nagamine, M.
AU - Noda, Z.
AU - Matsuda, J.
AU - Lyth, S. M.
AU - Hayashi, A.
AU - Sasaki, K.
N1 - Funding Information: Financial support by the Center-of-Innovation (COI) program, JST Japan, is gratefully acknowledged.
Publisher Copyright: © The Author(s) 2018. Published by ECS.
S. Matsumoto et al 2018 J. Electrochem. Soc. 165 F1164 DOI 10.1149/2.0321814jes
PY - 2018/10/23
Y1 - 2018/10/23
N2 - Bimetallic Pt-alloys supported on niobium-doped tin oxide (Nb-SnO2) with a vapor-grown carbon fiber (VGCF) backbone are presented as electrocatalysts for polymer electrolyte membrane fuel cells (PEFCs). These can simultaneously achieve both high catalytic activity and high cycling durability for the oxygen reduction reaction (ORR). This was confirmed both in half-cell and full-cell membrane electrode assembly (MEA) configuration, using 60,000 start-stop potential cycles and 400,000 load potential cycles. In this study, we focus on alloying Pt with Co or Ni, and the best performance is achieved for Pt3Co/Nb-SnO2/VGCF electrocatalysts. The catalyst particles are selectively decorated on the Nb-SnO2, resulting in improved resistance to carbon corrosion. Pt3Co alloying was verified by FE-SEM and high-resolution STEM-EDS. High initial mass activity of 274 A g−1 at 0.9 VRHE and 1840 A g−1 at 0.85 VRHE was achieved, with enhanced durability compared to conventional Pt/C electrocatalysts.
AB - Bimetallic Pt-alloys supported on niobium-doped tin oxide (Nb-SnO2) with a vapor-grown carbon fiber (VGCF) backbone are presented as electrocatalysts for polymer electrolyte membrane fuel cells (PEFCs). These can simultaneously achieve both high catalytic activity and high cycling durability for the oxygen reduction reaction (ORR). This was confirmed both in half-cell and full-cell membrane electrode assembly (MEA) configuration, using 60,000 start-stop potential cycles and 400,000 load potential cycles. In this study, we focus on alloying Pt with Co or Ni, and the best performance is achieved for Pt3Co/Nb-SnO2/VGCF electrocatalysts. The catalyst particles are selectively decorated on the Nb-SnO2, resulting in improved resistance to carbon corrosion. Pt3Co alloying was verified by FE-SEM and high-resolution STEM-EDS. High initial mass activity of 274 A g−1 at 0.9 VRHE and 1840 A g−1 at 0.85 VRHE was achieved, with enhanced durability compared to conventional Pt/C electrocatalysts.
KW - bimetallic Pt-alloys
KW - niobium-doped tin oxide (Nb-SnO2)
KW - vapor-grown carbon fiber (VGCF)
KW - electrocatalysts
KW - polymer electrolyte membrane fuel cells (PEFCs)
KW - oxygen reduction reaction (ORR)
UR - http://www.scopus.com/inward/record.url?scp=85064811651&partnerID=8YFLogxK
U2 - 10.1149/2.0321814jes
DO - 10.1149/2.0321814jes
M3 - Article
AN - SCOPUS:85064811651
SN - 0013-4651
VL - 165
SP - F1164-F1175
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 14
ER -
