Performance and degradation of high temperature polymer electrolyte fuel cell catalysts

Abstract An investigation of carbon-supported Pt/C and PtCo/C catalysts was carried out with the aim to evaluate their stability under high temperature polymer electrolyte membrane fuel cell (PEMFC) operation. Carbon-supported nanosized Pt and PtCo particles with a mean particle size between 1.5 nm and 3 nm were prepared by using a colloidal route. A suitable degree of alloying was obtained for the PtCo catalyst by using a carbothermal reduction. The catalyst stability was investigated to understand the influence of carbon black corrosion, platinum dissolution and sintering in gas-fed sulphuric acid electrolyte half-cell at 75 °C and in PEMFC at 130 °C. Electrochemical active surface area and catalyst performance were determined in PEMFC at 80 °C and 130 °C. A maximum power density of about 700 mW cm −2 at 130 °C and 3 bar abs. O 2 pressure with 0.3 mg Pt cm −2 loading was achieved. The PtCo alloy showed a better stability than Pt in sulphuric acid after cycling; yet, the PtCo/C catalyst showed a degradation after the carbon corrosion test. The PtCo/C catalyst showed smaller sintering effects than Pt/C after accelerated degradation tests in PEMFC at 130 °C.

[1]  Qingfeng Li,et al.  Approaches and Recent Development of Polymer Electrolyte Membranes for Fuel Cells Operating above 100 °C , 2003 .

[2]  K. Kinoshita,et al.  Electrochemical Oxygen Technology , 1992 .

[3]  Andrzej Wieckowski,et al.  Catalysis and Electrocatalysis at Nanoparticle Surfaces , 2003 .

[4]  Michael P. Balogh,et al.  Investigation of thermal and electrochemical degradation of fuel cell catalysts , 2006 .

[5]  K. Kreuer,et al.  On the development of proton conducting materials for technological applications , 1997 .

[6]  Diana Golodnitsky,et al.  A novel PTFE-based proton-conductive membrane , 2006 .

[7]  Hubert A. Gasteiger,et al.  Handbook of fuel cells : fundamentals technology and applications , 2003 .

[8]  Philip N. Ross,et al.  Oxygen Reduction Reaction on Pt and Pt Bimetallic Surfaces: A Selective Review , 2001 .

[9]  Zhongwei Chen,et al.  Durability investigation of carbon nanotube as catalyst support for proton exchange membrane fuel cell , 2006 .

[10]  Ping Yu,et al.  PtCo/C cathode catalyst for improved durability in PEMFCs , 2005 .

[11]  J. Scholta,et al.  Development and performance of a 10 kW PEMFC stack , 2004 .

[12]  P. Ross,et al.  Surface science studies of model fuel cell electrocatalysts , 2002 .

[13]  G. Alberti,et al.  Composite Membranes for Medium-Temperature PEM Fuel Cells , 2003 .

[14]  A. Shukla,et al.  Effect of carbon-supported and unsupported Pt–Ru anodes on the performance of solid-polymer-electrolyte direct methanol fuel cells , 1999 .

[15]  Héctor R. Colón-Mercado,et al.  Stability of platinum based alloy cathode catalysts in PEM fuel cells , 2006 .

[16]  L. Pino,et al.  Analysis of platinum particle size and oxygen reduction in phosphoric acid , 1991 .

[17]  L. Pino,et al.  Relationship between physicochemical properties and electrooxidation behaviour of carbon materials , 1991 .

[18]  Tsutomu Ioroi,et al.  Sub-stoichiometric titanium oxide-supported platinum electrocatalyst for polymer electrolyte fuel cells , 2005 .

[19]  David L. Wood,et al.  PEM fuel cell electrocatalyst durability measurements , 2006 .

[20]  Ermete Antolini,et al.  The stability of Pt–M (M = first row transition metal) alloy catalysts and its effect on the activity in low temperature fuel cells: A literature review and tests on a Pt–Co catalyst , 2006 .

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

[22]  V. Antonucci,et al.  Influence of the acid-base characteristics of inorganic fillers on the high temperature performance of composite membranes in direct methanol fuel cells , 2003 .

[23]  V. Antonucci,et al.  An XPS study on oxidation states of Pt and its alloys with Co and Cr and its relevance to electroreduction of oxygen , 2001 .

[24]  P. Bruce,et al.  Nanostructured materials for advanced energy conversion and storage devices , 2005, Nature materials.

[25]  Brian Theobald,et al.  An investigation into factors affecting the stability of carbons and carbon supported platinum and platinum/cobalt alloy catalysts during 1.2 V potentiostatic hold regimes at a range of temperatures , 2007 .

[26]  N. Marković,et al.  Surface Composition Effects in Electrocatalysis: Kinetics of Oxygen Reduction on Well-Defined Pt3Ni and Pt3Co Alloy Surfaces , 2002 .

[27]  H. Gasteiger,et al.  Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs , 2005 .

[28]  Antonino S. Aricò,et al.  Analysis of the high-temperature methanol oxidation behaviour at carbon-supported Pt–Ru catalysts , 2003 .

[29]  Tomoki Akita,et al.  Characteristics of a Platinum Black Catalyst Layer with Regard to Platinum Dissolution Phenomena in a Membrane Electrode Assembly , 2006 .