Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production
Electrochemical CO<sub>2</sub> 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 CO<sub>2</sub> to formate ions, but it is not scalable to use as an el...
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doaj-f8f6972a5e4b4462a151db6edc600b232020-11-25T00:50:35ZengMDPI AGCatalysts2073-43442019-04-019436710.3390/catal9040367catal9040367Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate ProductionSyed Asad Abbas0Seong-Hoon Kim1Hamza Saleem2Sung-Hee Ahn3Kwang-Deog Jung4Center for Clean Energy and Chemical Engineering, Korea Institute of Science and Technology, Hwarang no 14-gil 5, Seongbuk-gu, Seoul 136-791, KoreaCenter for Clean Energy and Chemical Engineering, Korea Institute of Science and Technology, Hwarang no 14-gil 5, Seongbuk-gu, Seoul 136-791, KoreaCenter for Clean Energy and Chemical Engineering, Korea Institute of Science and Technology, Hwarang no 14-gil 5, Seongbuk-gu, Seoul 136-791, KoreaCenter for Clean Energy and Chemical Engineering, Korea Institute of Science and Technology, Hwarang no 14-gil 5, Seongbuk-gu, Seoul 136-791, KoreaCenter for Clean Energy and Chemical Engineering, Korea Institute of Science and Technology, Hwarang no 14-gil 5, Seongbuk-gu, Seoul 136-791, KoreaElectrochemical CO<sub>2</sub> 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 CO<sub>2</sub> to formate ions, but it is not scalable to use as an electrode in electrochemical CO<sub>2</sub> reduction. Therefore, scalable amalgam electrodes with different base metals are tested to produce formate by an electrochemical CO<sub>2</sub> 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<sup>−2</sup>. It is concluded that Pd<sub>2</sub>Hg<sub>5</sub> alloy on the Pd amalgam electrode is an active phase for formate production in the electrochemical CO<sub>2</sub> reduction.https://www.mdpi.com/2073-4344/9/4/367electrochemical CO<sub>2</sub> reductionformate formationPd amalgammetal amalgam electrodes |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Syed Asad Abbas Seong-Hoon Kim Hamza Saleem Sung-Hee Ahn Kwang-Deog Jung |
spellingShingle |
Syed Asad Abbas Seong-Hoon Kim Hamza Saleem Sung-Hee Ahn Kwang-Deog Jung Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production Catalysts electrochemical CO<sub>2</sub> reduction formate formation Pd amalgam metal amalgam electrodes |
author_facet |
Syed Asad Abbas Seong-Hoon Kim Hamza Saleem Sung-Hee Ahn Kwang-Deog Jung |
author_sort |
Syed Asad Abbas |
title |
Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production |
title_short |
Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production |
title_full |
Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production |
title_fullStr |
Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production |
title_full_unstemmed |
Preparation of Metal Amalgam Electrodes and Their Selective Electrocatalytic CO<sub>2</sub> Reduction for Formate Production |
title_sort |
preparation of metal amalgam electrodes and their selective electrocatalytic co<sub>2</sub> reduction for formate production |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2019-04-01 |
description |
Electrochemical CO<sub>2</sub> 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 CO<sub>2</sub> to formate ions, but it is not scalable to use as an electrode in electrochemical CO<sub>2</sub> reduction. Therefore, scalable amalgam electrodes with different base metals are tested to produce formate by an electrochemical CO<sub>2</sub> 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<sup>−2</sup>. It is concluded that Pd<sub>2</sub>Hg<sub>5</sub> alloy on the Pd amalgam electrode is an active phase for formate production in the electrochemical CO<sub>2</sub> reduction. |
topic |
electrochemical CO<sub>2</sub> reduction formate formation Pd amalgam metal amalgam electrodes |
url |
https://www.mdpi.com/2073-4344/9/4/367 |
work_keys_str_mv |
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