Carbon-Neutralized Direct Methanol Fuel Cell Using Bifunctional (Methanol Oxidation/CO2 Reduction) Electrodes

In this study, a carbon-neutralized direct methanol fuel cell (DMFC) using two bifunctional electrodes, Pd-Ag and Pt-Zn, has been designed. This system has two modes, which are fuel-cell mode and spontaneous CO2 reduction mode. In the operation of fuel-cell mode, the methanol has been oxidized into...

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Bibliographic Details
Published inInternational journal of energy research Vol. 2023; pp. 1 - 10
Main Authors Kim, Yong Seok, Lee, Jae Wook, Kim, Byeongkyu, Bae, Jong Wook, Chung, Chan-Hwa
Format Journal Article
LanguageEnglish
Published Bognor Regis Hindawi 14.08.2023
Hindawi Limited
Subjects
Alcohol
Carbon dioxide
Carbon monoxide
Chemical reduction
Efficiency
Electricity
Electrodes
Electrolytes
Energy consumption
Fuel cells
Fuel technology
Hydrocarbons
Hydrogen
Metals
Methanol
Oxidation
Oxygen reduction reactions
Palladium
Platinum
Silver
Zinc
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Summary:In this study, a carbon-neutralized direct methanol fuel cell (DMFC) using two bifunctional electrodes, Pd-Ag and Pt-Zn, has been designed. This system has two modes, which are fuel-cell mode and spontaneous CO2 reduction mode. In the operation of fuel-cell mode, the methanol has been oxidized into CO2 on the Pd-Ag electrode and generates electricity. In the next step of the operation, CO2, which is the product of fuel-cell mode, has been spontaneously reduced to CO on Pd-Ag, and electricity has been obtained. In contrast, the Pt in the Pt-Zn electrode catalyzes the oxygen reduction reaction in the fuel-cell mode, and the Zn in Pt-Zn is oxidized sacrificially in the CO2 reduction mode. During operation in the fuel-cell mode, a power density of 12.11 mW/cm2 has been obtained with the production of CO2. On the other hand, the power density out of the CO2 reduction mode has been 11.76 mW/cm2. In each mode, the faradaic efficiencies of CO2 and CO have been 98.81% and 89.11%, respectively.
ISSN:0363-907X
1099-114X
DOI:10.1155/2023/9277179