Corresponding Author

Chen Aicheng


In recent years much effort has been put towards developing efficient Pt-based electrocatalysts for applications in fuel cells. With the rising cost of precious metals such as Pt,the need to enhance the activity and to decrease the load of catalysts is prominent. Herein we report on the synthesis and comparative study of nanoporous Pt,PtRu and PtRuIr electrocatalysts. The nanoporous electrodes were fabricated using a hydrothermal method and characterized by scanning electron microscopy (SEM) ,energy dispersive spectroscopy (EDS) ,X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) . The electrocatalytic activity of the fabricated nanopo- rous materials was evaluated using both CO stripping experiments and methanol oxidation reactions,revealing that the addition of Ir greatly improved the activity of the nanoporous PtRu. To decipher the origin of the significant enhancement,in-situ electrochemical FTIR spectroscopy was employed to study the oxidation of methanol on the nanoporous Pt,PtRu and PtRuIr electrodes.


electrocatalysis, methanol oxidation, electrochemical FTIR, nanoporous PtRuIr

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[1] Liu H,Zhang L,Zhang J,et al. A review of anode cataly- sis in the direct methanol fuel cell[J]. J of Power Sources,2006,155: 95-110.
[2] Chen A,Holt-Hindle P. Platinum-based nanostructured materials: Synthesis,properties and applications[J]. Chem Rev,2010,110: 3767-3804.
[3] Yajima T,Uchida H,Watanabe M. In-situ ATR-FTIR spectroscopic study of electro-oxidation of methanol and adsorbed CO at Pt-Ru alloy[J]. J Phys Chem B,2004,108: 2654-2659.
[4] Tian N,Zhou Z Y,Sun S G,et al. Synthesis of tetrahexa- hedral platinum nanocrystals with high-index facets and figh electro-oxidation activity[J]. Science,2007,316: 732-735.
[5] Xia M,Wang Q,Eikerling M,et al. Effectiveness factor of Pt utilization in cathode catalyst layer of polymer e- lectrolyte fuel cells[J]. Can J Chem,2008,86: 657- 667.
[6] Peng X,Koczkur K,Chen A. Synthesis and characteriza- tion of ruthenium decorated nanoporous platinum materi- als[J]. Nanotechnology,2007,18: 305605.
[7] Jiang L H,Sun G Q,Sun S G,et al. Structure and chem- ical composition of supported Pt-Sn electrocatalysts for ethanol oxidation[J]. Electrochim Acta,2005,50,5384- 5389.
[8] Jayaraman S,Jaramillo T F,Baeck S H,et al. Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells[J]. J Phys Chem B,2005,109: 22958-22966.
[9] Raychowdhury C,Matsumoto F,Zeldovich V B,et al. Synthesis,characterization,and electrocatalytic activity of PtBi and PtPb nanoparticles prepared by borohydride reduction in methanol[J]. Chem Mater,2006,18: 3365- 3372.
[10] Koczkur K,Yi Q,Chen A. Nanoporous Pt-Ru networks and their electrocatalytical properties[J]. Adv Mater, 2007,19: 2648-2652.
[11] Basnayake R,Li Z,Lakshmi S,et al. PtRu nanoparticle electrocatalyst with bulk alloy properties prepared through a sonochemical method[J]. Lang,2006,22: 10446-10450.
[12] Holt-Hindle P,Yi Q,Wu G,et al. Electrocatalytic ac-tivity of nanoporous Pt-Ir materials towards methanol oxidation and oxygen reduction[J]. J Electrochem Soc, 2008,155,K5-K9.
[13] Holt-Hindle P,Nigro S,Asmussen R M,et al. Ampero- metric glucose sensor based on Pt-Ir nanomaterials [J]. Electrochem Commun,2008,10: 1438-1441.
[14] Yan Y G,Li Q X,Huro S J,et al. Ubiquitous strategy for probing ATR surface - enhanced infrared absorption at platinum group metal-electrolyte interfaces[J]. J Phys Chem B,2005,109: 7900-7906.
[15] Sun S G,Chen A C. in-situ FTIRS Features during oxy- gen-adsorption and carbon-monoxide oxidation at a platinum electrode in dilute alkaline solutions[J]. J Electroanal Chem,1992,323: 319-328.
[16] Sun S G,Christensen P A,Wieckowski A. In-situ spec- troscopic studies of adsorption at the electrode and electrocatalysis,Elsevier,Netherlands 2007.
[17] Wang J,Holt-Hindle P,MacDonald D,et al. Synthesis and electrochemical study of Pt-based nanoporous ma- terials[J]. Electrochim Acta,2008,53: 6944-6951.
[18] Chen A,Lipkowski J. Electrochemical and spectroscop- ic studies of hydroxide adsorption at the Au( 111) e- lectrode[J]. J Phys Chem B,1999,103: 682-691.
[19] Ioroi T,Yasuda K. Platinum-iridium alloys as oxygen reduction electrocatalysts for polymer electrolyte fuel cells[J]. J Electrochem Soc,2005,152: A1917-1924.
[20] Gasteiger H A,Markovic N,Ross Jr P N,et al. Metha- nol electrooxidation on well characterized Pt-Ru alloys [J]. J Phys Chem,1993,97: 12020-12029.
[21] Arico A S,Antonucci P L,Modica E,et al. Effect of Pt- Ru alloy composition on high-temperature methanol e-lectro-oxidation[J]. Electrochim Acta,2002,47: 3723- 3732.
[22] Wagner C D,Riggs W M,Davis L E,et al. Handboook X-ray photoelectron spectroscopy[M]. Perkin-Elmer Co,1979.
[23] Aric A S,Creti P,Kim H,et al. Analysis of the electro- chemical characteristics of a direct methanol fuel cell based on a Pt-Ru/C anode catalyst[J]. J Electrochem Soc,1996,143: 3950-3959.
[24] Chen Y A,Ye S,Heinen M,et al. Application of in-situ attenuated total reflection-Fourier transform infrared spectroscopy for the understanding of complex reaction mechanism and kinetics: Formic acid oxidation on a Pt film electrode at elevated temperatures[J]. J Phys Chem B,2006,110: 9534-9544.
[25] Casado-Rivera E,Volpe D J,Alden L,et al. Electrocat- alytic activity of ordered intermetallic phases for fuel cell applications[J]. J Am Chem Soc,2004,126: 4043- 4049.
[26] Yeager E,Bockris J O,Conway B E,et al. Comprehen- sive treatise of electrochemistry,Electrodics: Experi- mental Techniques[M]. Vol. 9,Plenum Press,New York,1984.
[27] Wang J,Adams B,Asmussen R M,et al. Facile synthe- sis and electrochemical Properties of Intermetallic PtPb Nanodendrites[J]. Chem Mater,2009,21: 1716-1724.
[28] Lu G Q,Sun S G,Cai LR,et al. In situ FTIR spectro- scopic studies of adsorption of CO,SCN - ,and poly( o- phenylenediamine) on electrodes of nanometer thin films of Pt,Pd,and Rh: Abnormal infrared effects ( AI- REs) [J]. Lang,2000,16: 778-786.



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