caa a22 4500 475815173 CHVBK 20180406123808.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1023/A:1004059714791 doi (NATIONALLICENCE)springer-10.1023/A:1004059714791 Effect of particle size on the electrocatalytic activity of platinum dispersions in carbon matrix electrodes for phosphoric acid fuel cells [Elektronische Daten] [S.-B. Lee, S.-I. Pyun] The loss in electrocatalytic activity of Pt particles in carbon matrix electrodes has been experimentally and theoretically investigated as a function of Pt particle size. The measurement of the cathodic potentiostatic current transient showed that a decrease in oxygen reduction current due to carboxyl group formation, relative to the oxygen reduction current in the absence of carboxyl group, increased with a decreasing Pt particle size. This relative value is a measure of the loss in specific activity. A model describing the electrocatalytic activity loss has been proposed by introducing a new parameter, characterising the effective dead active area produced by the carboxyl group formation, relative to the total active area free of the carboxyl group. The agreement of the experimentally determined relative current decrease with the calculated relative value of the effective dead active area confirms the model. Kluwer Academic Publishers, 2000 crystallite size effect nationallicence carboxyl group nationallicence electrocatalytic activity nationallicence phosphoric acid fuel cell nationallicence Pt/C catalyst nationallicence Lee S.-B Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-Dong, Yusong-Gu, 305-701, Taejon, Korea aut Pyun S.-I Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-Dong, Yusong-Gu, 305-701, Taejon, Korea aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/7(2000-07-01), 795-801 0021-891X 30:7<795 2000 30 10800 https://doi.org/10.1023/A:1004059714791 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1004059714791 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee S.-B Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-Dong, Yusong-Gu, 305-701, Taejon, Korea aut NATIONALLICENCE 700 1- Pyun S.-I Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-Dong, Yusong-Gu, 305-701, Taejon, Korea aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/7(2000-07-01), 795-801 0021-891X 30:7<795 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer