Abstract
In this communication, we report a strategy for the preparation of Pt nanoparticles encapsulated in Generation 4.5 (Polyamido amine) PAMAM dendrimer and subsequent chemical linking of the nanocomposite to the gold electrode through a self assembled cystamine monolayer. The modification resulted in the formation of a robust electrochemically active thin film with very high surface area, reflected by the enhanced hydrogen adsorption coverage. Interestingly, TEM images revealed self-assembly of Pt nanoparticles and the SAED (Selected Area Electron Diffraction) patterns showed the presence of Pt single crystals (111). The Pt-dendrimer nanocomposite film obtained using the novel modification procedure exhibited high electrocatalytic activity for the oxidation of organic fuels like methanol, ethanol and ethylene glycol. The film did not suffer from degradation even after repeated use in solution-phase voltammetry. It is however observed that the intermediate SAM layer and the bulky PAMAM dendrimer (generation 4.5) have slowed down the electron transfer kinetics which is reflected by a relatively high overpotential for methanol oxidation. Nevertheless this shortcoming is more than compensated by the existence of Pt(111) planes, which alleviate CO poisoning.
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Raimondi F, Scherer GG, Katz R, Wokaun A (2005) Angew Chem Int Ed 44:2190
Peng X, Koczkur K, Nigro S, Chen A (2004) Chem Commun 2872
Zhou ZH, Wang S, Zhou W, Wang G, Jiang L, Li W, Song S, Liu J, Sun G, Xin Q (2003) Chem Commun 394
Chan K-Y, Ding J, Ren J, Cheng S, Tsang KY (2004) J Mater Chem 14:504
Park S, Chung TD, Kim HC (2003) Anal Chem 75:3046
Scott RWJ, Wilson OM, Crooks RM (2005) J Phys Chem B 109:692
Crooks RM, Zhao M, Sun L, Chechik V, Yeung LK (2001) Acc Chem Res 34:181
Zhao M, Sun L, Crooks RM (1998) J Am Chem Soc 120:4877
Niu Y, Yeung LK, Crooks RM (2001) J Am Chem Soc 123:6840
Li Y, El-Sayed MA (2001) J Phys Chem B 105:8938
Rahim EH, Kamounah FS, Frederiksen J, Christensen JB (2001) Nano Lett 1:499
Ooe M, Murata M, Mizugaki T, Ebitani K, Kaneda K (2002) Nano Lett 2:999
Manna A, Imae T, Aoi K, Okada M, Yogo T (2001) Chem Mater 13:1674
Chung Y-M, Rhee H-K (2003) Catal Lett 85:159
Toshima N, Yonezawa T, Kushihashi K (1993) J Chem Soc Faraday Trans 89:2537
Scott RWJ, Datye AK, Crooks RM (2003) J Am Chem Soc 125:3709
Scott RWJ, Wilson OM, Oh S-K, Kenik EA, Crooks RM (2004) J Am Chem Soc 126:15583
Ledesma-Garcia J, Manriquez J, Gutierrez-Granados S, Godinez LA (2003) Electroanalysis 15:659
Bustos E, Manriquez J, Orozco G, Godinez LA (2005) Langmuir 121:3013
Ye H, Crooks RM (2005) J Am Chem Soc 127:4930
Esumi K, Akiyama S, Yoshimuna T (2003) Langmuir 19:7679
Esumi K, Houdatsu H, Yoshimura T (2004) Langmuir 20:2536
Endo T, Yoshimura T, Esumi K (2005) J Colloid Interface Sci 286:602
Esumi K, Suzuki A, Yamahira A, Torigoe K (2000) Langmuir 16:2604
Yang L, Luo Y, Jia X, Ji Y, You L, Zhou Q (2004) J Phys Chem B 108:1176
Kim JW, Choi E-A, Park S-M (2003) J Electrochem Soc 150:E202
Raghu S, Berchmans S, Phani KLN, Yegnaraman V (2005) Pramana J Phys 65:821
McMurray J (2000) Organic chemistry, 5th edn. Brooks/Cole, USA, p 895, 1003
Gröhn F, Bauer BJ, Akpalu YA, Jackson CL, Amis EJ (2000) Macromolecules 33:6042
Prosa TJ, Bauer BJ, Amis EJ, Tomalia DA, Scherrenberg R (1997) J Polym Sci 35:2913
Left DV, Ohara PC, Heath JR, Gelbert WM (1995) J Phys Chem 99:7036
Diallo MS, Christie S, Swaminathan P, Balogh L, Shi X, Um W, Papelis C, Goddard WA III, Johnson JH Jr (2004) Langmuir 20:2640
Maiti PK, Cagin T, Lin ST, Goddard WA III (2006) Macromolecules 38:979
Ottaviani MF, Bossmann S, Turro NJ, Tomalia DA (1994) J Am Chem Soc 116:661
Park S, Weaver MJ (2002) J Phys Chem B 106:8667
Ye H, Scott RWJ, Crooks RM (2004) Langmuir 20:2915
Oh S-K, Kim Y-G, Ye H, Crooks RM (2003) Langmuir 19:10420
Zhao M, Crooks RM (1999) Adv Mater 11:217
Gu Y, Xie H, Gao J, Liu D, Williams CT, Murphy CJ, Ploehn HJ (2005) Langmuir 21:3122
Bard AJ, Faulkner LR (2001) Electrochemical methods, 2nd edn. John Wiley & Sons Inc., NY, p 560
Kabbabi A, Gloaguen F, Andolfatto F, Durand RJ (1994) J Electroanal Chem 373:251
Attard GA, Ahmadi A, Jenkins DJ, Hazzazi OA, Wells PB, Griffin KG, Johnson P, Gillies JE (2003) Chem Phys Chem 4:123
Finklea HO (1996) In: Bard AJ, Rubinstein J (eds) Electroanalytical chemistry, vol 19. Marcel Dekker, New York, pp 109–335
Bond GC (2002) Catal Today 72:5
Park S, Xie Y, Weaver MJ (2002) Langmuir 18:5792
Jarvi TD, Stuve EM (1998) In: Lipkowski J, Ross PN (eds) Electrocatalysis, frontiers of electrochemistry series, Chapter 3. Wiley-VCH Publishers, New York, pp 75–153
Mukerjee S, McBreen J (1998) J Electroanal Chem 448:163
Casado-Rivera E, Volpe DJ, Alden L, Lind C, Downie C, Vazquez-Alvarez T, Angelo ACD, DiSalvo FJ, Abruna HD (2004) J Am Chem Soc 126:4043
Nierengarten J-F (2005) Angew Chem Int Ed 44:2830
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Authors thank the Water & Steam Laboratory, IGCAR for XPS, and SAIF (IIT-Mumbai) and JNCASR, Bangalore for TEM measurements. The financial support by DRDO & DST (New Delhi) for the projects on Nanoscale Materials is gratefully acknowledged.
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Raghu, S., Nirmal, R.G., Mathiyarasu, J. et al. Platinum–Dendrimer Nanocomposite Films on Gold Surfaces for Electrocatalysis. Catal Lett 119, 40–49 (2007). https://doi.org/10.1007/s10562-007-9154-1
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DOI: https://doi.org/10.1007/s10562-007-9154-1