TY - JOUR
T1 - Preparation and characterization of carbon-supported Pt-Au cathode catalysts for oxygen reduction reaction
AU - Liu, Chen Wei
AU - Wei, Yu Chen
AU - Wang, Kuan Wen
N1 - Funding Information:
This work was supported by the National Science Council of Taiwan under contract No. NSC-97-2221-E-008-042.
PY - 2009/8/15
Y1 - 2009/8/15
N2 - Alloy catalysts of Pt-Au/C with various Pt/Au ratios were prepared for an oxygen reduction reaction (ORR). The structure, surface species, surface compositions, and electrocatalytic activities of prepared alloy catalysts were characterized by XRD, TPR, XPS, and rotating disk electrode (RDE) techniques, respectively. It was observed that the ORR activity of the Pt75Au25/C alloy catalyst was enhanced significantly in comparison to the commercial Pt/C catalyst within the mixed kinetic-diffusion control region. The alloying with Au modified the oxophilicity of Pt-Au alloy catalysts. TPR characterization suggests that the enhancement of Pt75Au25/C was attributed to the formation of an alloy surface, having a moderate oxophilicity and a Pt-related alloy surface species.
AB - Alloy catalysts of Pt-Au/C with various Pt/Au ratios were prepared for an oxygen reduction reaction (ORR). The structure, surface species, surface compositions, and electrocatalytic activities of prepared alloy catalysts were characterized by XRD, TPR, XPS, and rotating disk electrode (RDE) techniques, respectively. It was observed that the ORR activity of the Pt75Au25/C alloy catalyst was enhanced significantly in comparison to the commercial Pt/C catalyst within the mixed kinetic-diffusion control region. The alloying with Au modified the oxophilicity of Pt-Au alloy catalysts. TPR characterization suggests that the enhancement of Pt75Au25/C was attributed to the formation of an alloy surface, having a moderate oxophilicity and a Pt-related alloy surface species.
KW - Alloying
KW - Oxygen reduction reaction (ORR)
KW - Platinum-gold catalysts
KW - Temperature-programmed reduction (TPR)
UR - http://www.scopus.com/inward/record.url?scp=67549134930&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2009.04.081
DO - 10.1016/j.jcis.2009.04.081
M3 - 期刊論文
C2 - 19515376
AN - SCOPUS:67549134930
SN - 0021-9797
VL - 336
SP - 654
EP - 657
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
IS - 2
ER -