《化学科学与工程前沿(英文)》
>> 2012年
第6卷
第4期
doi:
10.1007/s11705-012-1216-2
RESEARCH ARTICLE
Preparation of a Pb loaded gas diffusion electrode and its application to CO
Key Laboratory for Green Chemical Technology (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
发布日期:
2012-12-05
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摘要
A Pb loaded gas diffusion electrode was fabricated and used for the electroreduction of CO to formic acid. The Pb/C catalyst was prepared by isometric impregnation. The crystal structure and morphology of the Pb/C catalyst were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). The preparation conditions of the gas diffusion electrode were optimized by adjusting the amounts of polytetrafluoroethylene (PTFE) in the gas diffusion layer and acetylene black in the catalytic layer. The electrochemical performance of the as-prepared gas diffusion electrode was studied by chronoamperometry and cyclic voltammetry. The optimized gas diffusion electrode showed good catalytic performance for the electroreduction of CO . The current efficiency of formic acid after 1 h of operation reached a maximum of 22% at -2.0 V versus saturated calomel electrode (SCE).