Hydrogen production and separation processes employing proton conductor and water-gas shift reaction catalyst

采用CsH_2PO_4/SiP_2O_7复合电解质在200℃下进行了电化学抽氢研究。当阳极通入加湿的一氧化碳时，阴极的析氢速率服从法拉第定律。在该体系中，水煤气变换反应在阳极极化过程中得到电化学促进。过电位在增湿一氧化碳中比在增湿氢气中高得多。位于阳极气体上游的Cu尖晶石催化剂由于在催化剂上形成氢而在低电流密度下降低阳极过电位。

Electrochemical hydrogen pumping was investigated with a cell consisting of CsH_2PO_4/SiP_2O_7 composite electrolyte at 200℃. When humidified carbon monoxide was fed to the anode, the evolution rate of hydrogen at the cathode obeyed the Faraday's law. In this system, the water gas shift reaction was promoted electrochemically at the anode during polarization. The overpotential was much higher in humidified carbon monoxide than in humidified hydrogen. The Cu spinel catalyst located upstream of anode gas reduced anodic overpotential at low current densities due to the formation of hydrogen over the catalyst.