Simultaneous Reduction of CO2 and Splitting of H2O by a Single Immobilized Cobalt Phthalocyanine Electrocatalyst

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• 作者：Natalia Morlanés ; Kazuhiro Takanabe ; Valentin Rodionov
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：May 6, 2016
• 年：2016
• 卷：6
• 期：5
• 页码：3092-3095
• 全文大小：293K
• 年卷期：0
• ISSN：2155-5435

文摘

Perfluorinated cobalt phthalocyanine (CoFPc) immobilized on carbon electrodes was found to electrocatalyze the reduction of CO₂ selectively to CO in an aqueous solution. The conversion of CO₂ became apparent at −0.5 V vs RHE, and the Faradaic efficiency for the CO production reached as high as 93% at −0.8 V vs RHE. Highly stable electrolysis of CO₂/H₂O into CO/O₂ was achieved for 12 h by applying the same catalyst as the cathode for CO₂ reduction and the anode for water oxidation. This result indicates the highly robust nature of the CoFPc at wide range of potentials from −0.9 V to +2.2 V vs RHE, demonstrating the potential bipolar electrolytic system for CO₂/H₂O electrolysis, using the single-site molecular CoFPc-based electrocatalyst, which is simple, inexpensive, robust, and efficient.