DEMS study on the electrochemical oxidation of a high surface area carbon black

TY - JOUR

T1 - DEMS study on the electrochemical oxidation of a high surface area carbon black

AU - Ashton, Sean James

AU - Arenz, Matthias

PY - 2011/12

Y1 - 2011/12

N2 - The intention of the study presented here is to investigate the electrochemical oxidation processes of a standard high surface area (HSA) carbon black, commonly used as a support for polymer electrolyte membrane fuel cell (PEMFC) catalysts. A methodology is presented, in which a combination of cyclic voltammetry (CV) and differential electrochemical mass spectrometry (DEMS) can be used to electrochemically characterise HSA carbon blacks, and to study their electrochemical oxidation effectively. It is found that the electrochemical oxidation of a Ketjen Black EC300 carbon is dynamic, and that the initial electrochemical oxidation of a pristine sample results in the complete passivation of the carbon surface inhibiting further oxidation, if the carbon is not reduced in a low potential excursion.

AB - The intention of the study presented here is to investigate the electrochemical oxidation processes of a standard high surface area (HSA) carbon black, commonly used as a support for polymer electrolyte membrane fuel cell (PEMFC) catalysts. A methodology is presented, in which a combination of cyclic voltammetry (CV) and differential electrochemical mass spectrometry (DEMS) can be used to electrochemically characterise HSA carbon blacks, and to study their electrochemical oxidation effectively. It is found that the electrochemical oxidation of a Ketjen Black EC300 carbon is dynamic, and that the initial electrochemical oxidation of a pristine sample results in the complete passivation of the carbon surface inhibiting further oxidation, if the carbon is not reduced in a low potential excursion.

M3 - Journal article

SN - 1388-2481

VL - 13

SP - 1473

EP - 1475

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -