Electrochemical stability and postmortem studies of Pt/SiC catalysts for polymer electrolyte membrane fuel cells

TY - JOUR

T1 - Electrochemical stability and postmortem studies of Pt/SiC catalysts for polymer electrolyte membrane fuel cells

AU - Stamatin, Serban Nicolae

AU - Spéder, József

AU - Dhiman, Rajnish

AU - Arenz, Matthias

AU - Skou, Eivind Morten

PY - 2015/3/25

Y1 - 2015/3/25

N2 - In the presented work, the electrochemical stability of platinized silicon carbide is studied. Postmortem transmission electron microscopy and X-ray photoelectron spectroscopy were used to document the change in the morphology and structure upon potential cycling of Pt/SiC catalysts. Two different potential cycle aging tests were used in order to accelerate the support corrosion, simulating start-up/shutdown and load cycling. On the basis of the results, we draw two main conclusions. First, platinized silicon carbide exhibits improved electrochemical stability over platinized active carbons. Second, silicon carbide undergoes at least mild oxidation if not even silicon leaching.

AB - In the presented work, the electrochemical stability of platinized silicon carbide is studied. Postmortem transmission electron microscopy and X-ray photoelectron spectroscopy were used to document the change in the morphology and structure upon potential cycling of Pt/SiC catalysts. Two different potential cycle aging tests were used in order to accelerate the support corrosion, simulating start-up/shutdown and load cycling. On the basis of the results, we draw two main conclusions. First, platinized silicon carbide exhibits improved electrochemical stability over platinized active carbons. Second, silicon carbide undergoes at least mild oxidation if not even silicon leaching.

U2 - 10.1021/am508982d

DO - 10.1021/am508982d

M3 - Journal article

C2 - 25719513

SN - 1944-8244

VL - 7

SP - 6153

EP - 6161

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 11

ER -