Abstract
Bulk Pt3Co and nanosized Pt3Co and PtCo alloys supported on high area carbon were investigated as the electrocatalysts for the COads and HCOOH oxidation. Pt3Co alloy with Co electrochemically leached from the surface (Pt skeleton) was employed to separate electronic from ensemble and bifunctional effects of Co. Cyclic voltammetry in 0.1 M HClO4 showed reduced amount of adsorbed hydrogen on Pt sites on Pt3Co alloy compared to pure Pt. However, no significant difference in hydrogen adsorption/desorption and Pt-oxide reduction features between Pt3Co with Pt skeleton structure and bulk Pt was observed. The oxidation of COads on Pt3Co alloy commenced earlier than on Pt, but this effect on Pt3Co with Pt skeleton structure was minor indicating that bifunctional mechanism is stronger than the electronic modification of Pt by Co. The HCOOH oxidation rate on Pt3Co alloy was about seven times higher than on bulk Pt when the reaction rates were compared at 0.4 V, i.e., in the middle of the potential range for the HCOOH oxidation. Like in the case of COads oxidation, Pt skeleton showed similar activity as bulk Pt indicating that the ensemble effect is responsible for the enhanced activity of Pt3Co alloy toward HCOOH oxidation. The comparison of COads and HCOOH oxidation on Pt3Co/C and PtCo/C with the same reaction on Pt/C were qualitatively the same as on bulk materials.
Similar content being viewed by others
References
Yu X, Pickup PG (2008) J Power Sourc 182:124
Capon A, Parsons R (1973) J Electroanal Chem 44:1
Miki A, Ye S, Osawa M (2002) Chem Commun 1500–1501
Neurock M, Janik M, Wieckowski A (2009) Faraday Discuss 140:363
Cuesta A, Escudero M, Lanova B, Baltruschat H (2009) Langmuir 25:6500
Scheijen FJE, Beltramo GL, Hoeppener S, Housmans THM, Koper MTM (2008) J Solid State Electrochem 12:483
Park IS, Lee KS, Choi JH, Park HY, Sung YE (2007) J Phys Chem C 111:19126
Kristian N, Yu Y, Gunawan P, Xu R, Deng W, Liu X, Wang X (2009) Electrochim Acta 54:4916
Patra S, Das J, Yang H (2009) Electrochim Acta 54:3441
Choi JH, Park KW, Park IS, Kim K, Lee JS, Sung YE (2006) J Electrochem Soc 153:A1812
Obradović MD, Tripković AV, Gojković SL (2009) Electrochim Acta 55:204
Xia X, Iwasita T (1993) J Electrochem Soc 140:2559
Alden LR, Han DK, Matsumoto F, Abruña HD, DiSalvo FJ (2006) Chem Mater 18:5591
Casado-Rivera E, Gál Z, Angelo ACD, Lind C, DiSalvo FJ, Abruña HD (2003) Chem Phys Chem 4:193
Tripković AV, Popović KDJ, Stevanović RM, Socha R, Kowal A (2006) Electrochem Commun 8:1492
Chetty R, Scott K (2007) J New Mater Electrochem Syst 10:135
Gojković SLJ, Tripković AV, Stevanović RM, Krstajić NV (2007) Langmuir 23:12760
Rice C, Ha SY, Masel RI, Wieckowski A (2003) J Power Sourc 115:229
Thomas FS, Masel RI (2004) Surf Sci 573:169
Kitchin JR, Nørskov JK, Barteau MA, Chen JG (2004) J Chem Phys 120:10240
Kitchin JR, Nørskov JK, Barteau MA, Chen JG (2004) Phys Rev Lett 93:156801
Stamenkovic V, Schmidt TJ, Ross PN, Markovic NM (2002) J Phys Chem B 106:11970
Paulus UA, Wokaun A, Scherer GG, Schmidt TJ, Stamenkovic V, Radmilovic V, Markovic NM, Ross PN (2002) J Phys Chem B 106:4181
Wakisaka M, Mitsui S, Hirose Y, Kawashima K, Uchida H, Watanabe M (2006) J Phys Chem B 110:23489
Bogdanovskaya VA, Tarasevich MR, Reznikova LA, Kuznetsova LN (2010) Russ J Electrochem 46:1011
Xu Q, Kreidler E, He T (2010) Electrochim Acta 55:7551
Stamenkovic VR, Mun BS, Mayrhofer KJJ, Ross PN, Markovic NM (2006) J Am Chem Soc 128:8813
Kinoshita K, Stonehart P (1975) Electrochim Acta 20:101
Papadimitriou S, Tegou A, Pavlidou E, Armyanov S, Valova E, Kokkinidis G, Sotiropoulos S (2008) Electrochim Acta 53:6559
Tegou A, Papadimitriou S, Kokkinidis G, Sotiropoulos S (2010) J Solid State Electrochem 14:175
Wakisaka M, Suzuki H, Mitsui S, Uchida H, Watanabe M (2008) J Phys Chem C 112:2750
Lović JD, Tripković AV, Gojković SLJ, Popović KDJ, Tripković DV, Olszewski P, Kowal A (2005) J Electroanal Chem 581:294
Kita H, Lei HW (1995) J Electroanal Chem 388:167
Jerkiewicz G, Vatankhah G, Lessard J, Soriaga MP, Park YS (2004) Electrochim Acta 49:1451
Björling A, Ahlberg E, Feliu JM (2010) Electrochem Commun 12:359
Esparbé I, Brillas E, Centellas F, Garrido JA, Rodríguez RM, Arias C, Cabot PL (2009) J Power Sourc 190:201
Hammer B, Nielsen OH, Nørskov JK (1997) Catal Lett 46:31
Cherstiouk OV, Simonov PA, Savinova ER (2003) Electrochim Acta 48:3851
Kumar S, Zou S (2007) Langmuir 23:7365
Takasu Y, Iwazaki T, Sugimoto W, Murakami Y (2000) Electrochem Commun 2:671
Guerin S, Hayden BE, Lee CE, Mormiche C, Owen JR, Russell AE, Theobald B, Thompsett D (2004) J Comb Chem 6:149
Acknowledgment
This work was financially supported by the Ministry of Science and Technological Development, Republic of Serbia, Contract No. 172060.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Obradović, M.D., Tripković, A.V. & Gojković, S.L. Oxidation of carbon monoxide and formic acid on bulk and nanosized Pt–Co alloys. J Solid State Electrochem 16, 587–595 (2012). https://doi.org/10.1007/s10008-011-1389-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10008-011-1389-5