Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO2 reduction for Formate Production

Title
Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO2 reduction for Formate Production
Authors
정광덕안성희함자 살림김성훈아사드 아바스
Issue Date
2019-04
Publisher
Catalysts
Citation
VOL 9, NO 4-367-13
Abstract
Electrochemical CO2 reduction to produce formate ions has studied for the sustainable carbon cycle. Mercury in the liquid state is known to be an active metallic component to selectively convert CO2 to formate ions, but it is not scalable to use as an electrode in electrochemical CO2 reduction. Therefore, scalable amalgam electrodes with different base metals are tested to produce formate by an electrochemical CO2 reduction. The amalgam electrodes are prepared by the electrodeposition of Hg on the pre-electrodeposited Pd, Au, Pt and Cu nanoparticles on the glassy carbon. The formate faradaic efficiency with the Pd, Au, Pt and Cu is lower than 25%, while the one with the respective metal amalgams is higher than 50%. Pd amalgam among the tested samples shows the highest formate faradic efficiency and current density. The formate faradaic efficiency is recorded 85% at − 2.1 V vs SCE and the formate current density is − 6.9 mA cm− 2. It is concluded that Pd2Hg5 alloy on the Pd amalgam electrode is an active phase for formate production in the electrochemical CO2 reduction.
URI
http://pubs.kist.re.kr/handle/201004/70252
ISSN
2073-4344
Appears in Collections:
KIST Publication > Article
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