An investigation into factors affecting the stability of carbons and carbon supported platinum and platinum/cobalt alloy catalysts during 1.2V potentiostatic hold regimes at a range of temperatures

Ball, Sarah C.; Hudson, Sarah L.; Thompsett, David; Theobald, Brian

doi:10.1016/j.jpowsour.2006.11.004

Cited by 137 publications

(136 citation statements)

References 19 publications

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“…Experiments at 1.2 V versus RHE potential hold suggested a fast increase in surface oxides during the first 16 h and a slower increase thereafter. The decrease in corrosion rate in time has also been observed elsewhere [87,91,92].…”

Section: Carbon Oxidationsupporting

confidence: 75%

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Review: Durability and Degradation Issues of PEM Fuel Cell Components

2008

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Besides cost reduction, durability is the most important issue to be solved before commercialisation of PEM Fuel Cells can be successful. For a fuel cell operating under constant load conditions, at a relative humidity close to 100% and at a temperature of maximum 75 °C, using optimal stack and flow design, the voltage degradation can be as low as 1–2 μV·h. However, the degradation rates can increase by orders of magnitude when conditions include some of the following, i.e. load cycling, start–stop cycles, low humidification or humidification cycling, temperatures of 90 °C or higher and fuel starvation. This review paper aims at assessing the degradation mechanisms of membranes, electrodes, bipolar plates and seals. By collecting long‐term experiments as well, the relative importance of these degradation mechanisms and the operating conditions become apparent.

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Section: Carbon Oxidationsupporting

confidence: 75%

“…In a recent paper Ball et al found no effect of Pt on the corrosion. This conclusion, however, was based upon corrosion current measurement and not on the direct measurement of CO 2 evolution [92].…”

Section: Carbon Oxidationmentioning

confidence: 96%

Review: Durability and Degradation Issues of PEM Fuel Cell Components

2008

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“…According to previous studies on the corrosion of carbon and durability of fuel cell catalysts, [24][25][26][27] increased amounts of exposed platinum with repeat potential cycles are likely due to electrochemical corrosion of carbon. Electrochemical carbon corrosion is generally thought to proceed via a three-step process involving four electrons in acid electrolytes.…”

Section: Catalyst Ptmentioning

confidence: 95%

The Stability of Platinum–Carbon Aerogel Catalysts upon Repeated Potential Cycles

2009

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“…Once the carbon support was filtered and washed with DI-water, the material was allowed to dry overnight in a vacuum oven at 80 ºC. This introduces oxygen containing groups to the carbon support via quinone-hydroquinone redox couple [16][17][18].…”

Section: Catalyst Synthesismentioning

confidence: 99%

Effect of pretreatment on Pt–Co/C cathode catalysts for the oxygen reduction reaction

Fox

Colón-Mercado

2010

International Journal of Hydrogen Energy

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8035078560Carbon supported Pt and Pt-Co electrocatalysts for the oxygen reduction reaction in low temperature fuel cells were prepared by the reduction of the metal salts with sodium borohydride and sodium formate. The effect of surface treatment with nitric acid on the carbon surface and Co on the surface of carbon prior to the deposition of Pt was studied. The catalysts where Pt was deposited on treated carbon the ORR reaction preceded more through the two electron pathway and favored peroxide production, while the fresh carbon catalysts proceeded more through the four electron pathway to complete the oxygen reduction reaction. NaCOOH reduced Pt/C catalysts showed higher activity that NaBH 4 reduced Pt/C catalysts. It was determined that the Co addition has a higher impact on catalyst activity and active surface area when used with NaBH 4 as reducing agent as compared to NaCOOH.

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An investigation into factors affecting the stability of carbons and carbon supported platinum and platinum/cobalt alloy catalysts during 1.2V potentiostatic hold regimes at a range of temperatures

Cited by 137 publications

References 19 publications

Review: Durability and Degradation Issues of PEM Fuel Cell Components

Review: Durability and Degradation Issues of PEM Fuel Cell Components

The Stability of Platinum–Carbon Aerogel Catalysts upon Repeated Potential Cycles

Effect of pretreatment on Pt–Co/C cathode catalysts for the oxygen reduction reaction

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