Effect of oleylamine concentration on the structure and oxygen reduction activity of carbon-supported surface-Pt-enriched Pt3Au electrocatalysts
作者： Kug-Seung Lee , Hee-Young Park , Young-Hoon Chung , Sung Jong Yoo , Suk Woo Nam
DOI: 10.1016/J.JPOWSOUR.2015.04.165
关键词:
摘要: For carbon-supported Pt-enriched Pt3Au nanoparticles (Pt3Au/C), the effect of oleylamine (OA) concentration during nanoparticle synthesis is investigated. When OA increased from 0.12 mM to 1.2 mM, particle size gradually decreased 5.1 nm 3.3 nm, whereas crystal structure and surface Pt are not significantly influenced. With higher concentration, oxygen reduction reaction activity Pt3Au/C largely enhanced, which can be explained by combined specific electrochemical area Pt. It experimentally confirmed using a bulk CO-oxidation technique that smaller (larger concentration) leads OH adsorption strength, originates double layer overlapping closely adjacent nanoparticles.
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sci-hub.se 参考文章(47)
Shirlaine Koh, Peter Strasser, Electrocatalysis on bimetallic surfaces: modifying catalytic reactivity for oxygen reduction by voltammetric surface dealloying. Journal of the American Chemical Society. ,vol. 129, pp. 12624- 12625 ,(2007) , 10.1021/JA0742784
K.J.J. Mayrhofer, D. Strmcnik, B.B. Blizanac, V. Stamenkovic, M. Arenz, N.M. Markovic, Measurement of oxygen reduction activities via the rotating disc electrode method : from Pt model surfaces to carbon-supported high surface area catalysts. Electrochimica Acta. ,vol. 53, pp. 3181- 3188 ,(2008) , 10.1016/J.ELECTACTA.2007.11.057
Minoru Inaba, Taro Kinumoto, Masayuki Kiriake, Ryota Umebayashi, Akimasa Tasaka, Zempachi Ogumi, Gas crossover and membrane degradation in polymer electrolyte fuel cells Electrochimica Acta. ,vol. 51, pp. 5746- 5753 ,(2006) , 10.1016/J.ELECTACTA.2006.03.008
Kug-Seung Lee, Hee-Young Park, Hyung Chul Ham, Sung Jong Yoo, Hyoung Juhn Kim, EunAe Cho, Arumugam Manthiram, Jong Hyun Jang, Reversible surface segregation of Pt in a Pt3Au/C catalyst and its effect on the oxygen reduction reaction Journal of Physical Chemistry C. ,vol. 117, pp. 9164- 9170 ,(2013) , 10.1021/JP403135K
E. Antolini, F. Cardellini, Formation of carbon supported PtRu alloys: an XRD analysis Journal of Alloys and Compounds. ,vol. 315, pp. 118- 122 ,(2001) , 10.1016/S0925-8388(00)01260-3
J. Greeley, J.K. Nørskov, Electrochemical dissolution of surface alloys in acids: Thermodynamic trends from first-principles calculations Electrochimica Acta. ,vol. 52, pp. 5829- 5836 ,(2007) , 10.1016/J.ELECTACTA.2007.02.082
Derrick Mott, Jin Luo, Peter N. Njoki, Yan Lin, Lingyan Wang, Chuan-Jian Zhong, Synergistic activity of gold-platinum alloy nanoparticle catalysts Catalysis Today. ,vol. 122, pp. 378- 385 ,(2007) , 10.1016/J.CATTOD.2007.01.007
K. J. J. Mayrhofer, B. B Blizanac, M. Arenz, V. R. Stamenkovic, P. N. Ross, N. M. Markovic, The impact of geometric and surface electronic properties of pt-catalysts on the particle size effect in electrocatalysis. Journal of Physical Chemistry B. ,vol. 109, pp. 14433- 14440 ,(2005) , 10.1021/JP051735Z
Minhua Shao, Amra Peles, Krista Shoemaker, Electrocatalysis on Platinum Nanoparticles: Particle Size Effect on Oxygen Reduction Reaction Activity Nano Letters. ,vol. 11, pp. 3714- 3719 ,(2011) , 10.1021/NL2017459
Zhufang Liu, Earl T. Ada, Mohammad Shamsuzzoha, Gregory B. Thompson, David E. Nikles, Synthesis and Activation of PtRu Alloyed Nanoparticles with Controlled Size and Composition Chemistry of Materials. ,vol. 18, pp. 4946- 4951 ,(2006) , 10.1021/CM060973J