Functional Effects of the Deposition Substrate on the Electrochemical Behavior of Platinum Particles

In the present work, polytyramine (PTy) and cobalt oxide (Co3O4) were used as substrates for platinum electrodeposition, in order to obtain electrode systems with electrocatalytic properties. PTy and Co3O4 were previously electrochemically deposited on graphite and boron-doped diamond (BDD) supports, respectively. Anodic oxidation of methanol was used as a test-reaction for assessing possible functional effects of the substrate on the electrochemical behavior of the Pt particles. It was found that, when deposited on PTy or cobalt oxide, the electrocatalyst exhibits higher activity and is less susceptible to fouling, via strong adsorption of reaction intermediates. X-ray photoelectron spectroscopy (XPS) measurements suggested that these features can be ascribed to the presence of –OH functional groups at the surface of the Pt particles. It was also found that electrodeposition of platinum on BDD resulted only in metallic Pt and Pt(OH)2, whereas when graphite was used as substrate the presence of platinum oxides was also evident. During prolonged anodic oxidation of methanol, a higher stability of the –OH groups from the platinum surface was observed for graphite-supported Pt particles, compared to the case when bare BDD was used as support.

[1]  C. Cabrera,et al.  Sequential Electrodeposition of Platinum-Ruthenium at Boron-Doped Diamond Electrodes for Methanol Oxidation , 2011 .

[2]  Tanta Spataru,et al.  Platinum–polytyramine composite material with improved performances for methanol oxidation , 2011 .

[3]  J. Bokhoven,et al.  In situ XAS probes partially oxidized platinum generating high activity for CO oxidation , 2009 .

[4]  Tanta Spataru,et al.  Electrodeposition of platinum on polytyramine-modified electrodes for electrocatalytic applications , 2009 .

[5]  J. Bokhoven,et al.  On highly active partially oxidized platinum in carbon monoxide oxidation over supported platinum catalysts , 2009 .

[6]  H. Heidari,et al.  Electrocatalytic oxidation of methanol and ethanol at carbon ceramic electrode modified with platinum nanoparticles , 2008 .

[7]  P. Glatzel,et al.  Generating highly active partially oxidized platinum during oxidation of carbon monoxide over Pt/Al2O3: in situ, time-resolved, and high-energy-resolution X-ray absorption spectroscopy. , 2008, Angewandte Chemie.

[8]  R. McCreery,et al.  Advanced carbon electrode materials for molecular electrochemistry. , 2008, Chemical reviews.

[9]  E. Yoo,et al.  Effect of carbon substrate materials as a Pt-Ru catalyst support on the performance of direct methanol fuel cells , 2008 .

[10]  Hu-lin Li,et al.  Electrochemical oxidation of methanol on Pt nanoparticles composited MnO2 nanowire arrayed electrode , 2008 .

[11]  A. Fujishima,et al.  Platinum Electrodeposition on Conductive Diamond Powder and Its Application to Methanol Oxidation in Acidic Media , 2008 .

[12]  Kyung‐Won Park,et al.  Nb-TiO2 supported Pt cathode catalyst for polymer electrolyte membrane fuel cells , 2007 .

[13]  M. Jakšić,et al.  Advances in interactive supported electrocatalysts for hydrogen and oxygen electrode reactions , 2007 .

[14]  Jason D. Goodpaster,et al.  Methanol dehydrogenation and oxidation on Pt(111) in alkaline solutions. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[15]  Anusorn Kongkanand,et al.  Single-wall carbon nanotubes supported platinum nanoparticles with improved electrocatalytic activity for oxygen reduction reaction. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[16]  José L. Figueiredo,et al.  Enhanced electrocatalytic activity of carbon-supported MnOx/Ru catalysts for methanol oxidation in fuel cells , 2006 .

[17]  H. Razmi,et al.  Electroless immobilization and electrochemical characteristics of nickel hexacyanoruthenate film at an aluminum substrate , 2006 .

[18]  A. Manivannan,et al.  Electrochemical Deposition of Titanium Oxide on Boron-Doped Diamond Electrodes , 2005 .

[19]  Jae Hyun Kim,et al.  Electrochemical Characterization of Electrochemically Prepared Ruthenium Oxide/Carbon Nanotube Electrode for Supercapacitor Application , 2005 .

[20]  Jianrong Chen,et al.  Electrodeposited nonconducting polytyramine for the development of glucose biosensors. , 2005, Analytical biochemistry.

[21]  Prashant V. Kamat,et al.  Carbon Nanostructures in Portable Fuel Cells: Single-Walled Carbon Nanotube Electrodes for Methanol Oxidation and Oxygen Reduction , 2004 .

[22]  M. Balasubramanian,et al.  ULTRA-LOW PLATINUM CONTENT FUEL CELL ANODE ELECTROCATALYST WITH A LONG-TERM PERFORMANCE STABILITY , 2004 .

[23]  Akira Fujishima,et al.  Electrochemical reduction of carbon dioxide at ruthenium dioxide deposited on boron-doped diamond , 2003 .

[24]  Z. Qi,et al.  Low Pt loading high performance cathodes for PEM fuel cells , 2003 .

[25]  Guoying Chen,et al.  DEVELOPMENT OF SUPPORTED BIFUNCTIONAL ELECTROCATALYSTS FOR UNITIZED REGENERATIVE FUEL CELLS , 2002 .

[26]  T. R. Ralph,et al.  Catalysis for low temperature fuel cells. Part I: The cathode challenges , 2002 .

[27]  Juhyoun Kwak,et al.  Ordered nanoporous arrays of carbon supporting high dispersions of platinum nanoparticles , 2001, Nature.

[28]  J. Leger,et al.  Mechanistic aspects of methanol oxidation on platinum-based electrocatalysts , 2001 .

[29]  Yann Bultel,et al.  Oxygen reduction reaction kinetics and mechanism on platinum nanoparticles inside Nafion , 2001 .

[30]  Jeffrey W. Long,et al.  Voltammetric Characterization of Ruthenium Oxide-Based Aerogels and Other RuO2 Solids: The Nature of Capacitance in Nanostructured Materials , 1999 .

[31]  Robert Durand,et al.  Electrochemical reduction of oxygen on platinum nanoparticles in alkaline media , 1998 .

[32]  Kazuhito Hashimoto,et al.  Electrochemical Behavior of Highly Conductive Boron‐Doped Diamond Electrodes for Oxygen Reduction in Alkaline Solution , 1998 .

[33]  E. J. Taylor,et al.  Preparation of High‐Platinum‐Utilization Gas Diffusion Electrodes for Proton‐Exchange‐Membrane Fuel Cells , 1992 .

[34]  M. Watanabe,et al.  Electrocatalysis by ad-atoms: Part III. Enhancement of the oxidation of carbon monoxide on platinum by ruthenium ad-atoms , 1975 .

[35]  Brian E. Conway,et al.  Modern Aspects of Electrochemistry , 1974 .