Electrochemical Hydrogen Production from Carbon Monoxide and Steam with a Cell Employing CsH2PO4/SiP2O7 Composite Electrolyte
Electrochemical Hydrogen Production from Carbon Monoxide and Steam with a Cell Employing CsH2PO4/SiP2O7 Composite Electrolyte
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DOI：
10.1149/1.3232302
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发表时间：
2009-01-01
影响因子：
3.9
通讯作者：
Eguchi, Koichi
中科院分区：
文献类型：
--
作者：
Muroyama, Hiroki;Matsui, Toshiaki;Eguchi, Koichi
以CsH2PO4/SiP2O7复合电解质为电池，在200℃的温度下进行了电化学抽氢实验，当负极加湿氢气时，在电流密度为1000 mA cm（-2）时，阴极氢气的析出速率符合法拉第定律。在该系统中，在极化过程中，在阳极上用加湿一氧化碳催化了水煤气移位反应（WGSR）。湿化一氧化碳的过电位比湿化氢气高得多。由于催化WGSR反应器位于阳极气的上游，因此过电位与反应器的温度和空速有很大关系。由Cu尖晶石氧化物和Pt催化剂组成的双层电极在低电流密度下表现出低过电位，这是由于Cu尖晶石催化剂上形成了氢。(C) 2009电化学学会。[DOI: 10.1149/1.3232302]版权所有。
Electrochemical hydrogen pumping was investigated with a cell consisting of a CsH2PO4/SiP2O7 composite electrolyte at 200 degrees C. When humidified hydrogen was fed to the anode, the evolution rate of hydrogen at the cathode obeyed Faraday's law up to a current density of 1000 mA cm(-2). In this system, the water-gas shift reaction (WGSR) was promoted electrochemically at the anode during polarization with a feed of humidified carbon monoxide. The overpotential was much higher in humidified carbon monoxide than in humidified hydrogen. With the reactor for the catalytic WGSR located upstream of the anode gas, the overpotential significantly depended on the temperature and space velocity of the reactor. The bilayered electrode composed of a Cu spinel oxide and a Pt catalyst exhibited a low overpotential at low current densities due to the formation of hydrogen over the Cu spinel catalyst. (C) 2009 The Electrochemical Society. [DOI: 10.1149/1.3232302] All rights reserved.