Kazuma Shinozaki
Colorado School of Mines
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Kazuma Shinozaki.
Journal of The Electrochemical Society | 2011
Kazuma Shinozaki; Haruhiko Yamada; Yu Morimoto
Pt utilization, i.e., the ratio of the electrochemically active Pt surface area of an MEA to the total Pt surface area of the catalyst, was analyzed at 20-100% RH, and 40-80°C by a newly developed technique using CO as a probe. The Pt utilization significantly decreased with the decreasing relative humidity (RH) for a Pt/C catalyst in which the Pt particles are supported not only on the outer surface, but also within the pores of the carbon particles, while it remained high even at a low RH for the samples with Pt particles supported only on the outer surface of the carbon particles. We presume that this is because the Pt particles within the pores are not in contact with the ionomer therefore, the protons cannot access them at a low RH.
Meeting Abstracts | 2010
Kazuma Shinozaki; Haruhiko Yamada; Yu Morimoto
Pt utilization, i.e. the ratio of the electrochemically active Pt surface area of a MEA to the Pt surface area of the catalyst, was analyzed at 20-100%RH, 40-80°C. Pt utilization significantly decreased with decreasing RH for Pt/C catalysts in which Pt particles are supported not only on the carbon surface but also inside the carbon, while kept high even at low RH in the samples with Pt particles supported only on the carbon surface. We presume that this is because the Pt particles inside are not covered with ionomers and protons cannot access any longer at low RH.
Journal of The Electrochemical Society | 2015
Kazuma Shinozaki; Jason W. Zack; Ryan M. Richards; Bryan S. Pivovar; Shyam S. Kocha
Journal of The Electrochemical Society | 2015
Kazuma Shinozaki; Jason W. Zack; Svitlana Pylypenko; Bryan S. Pivovar; Shyam S. Kocha
Journal of The Electrochemical Society | 2014
Kensaku Kodama; Akihiro Shinohara; Naoki Hasegawa; Kazuma Shinozaki; Ryosuke Jinnouchi; Takahisa Suzuki; Tatsuya Hatanaka; Yu Morimoto
Electrochimica Acta | 2016
Kazuma Shinozaki; Yu Morimoto; Bryan S. Pivovar; Shyam S. Kocha
224th ECS Meeting (October 27 – November 1, 2013) | 2013
Kazuma Shinozaki; Bryan S. Pivovar; Shyam S. Kocha
Journal of Power Sources | 2016
Kazuma Shinozaki; Yu Morimoto; Bryan S. Pivovar; Shyam S. Kocha
International Journal of Hydrogen Energy | 2015
Kazuma Shinozaki; Jason W. Zack; Svitlana Pylypenko; Ryan M. Richards; Bryan S. Pivovar; Shyam S. Kocha
212th ECS Meeting | 2007
Kazuma Shinozaki; Tatsuya Hatanaka; Yu Morimoto