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- W4220737418 abstract "The use of metal electrocatalysts (Cu, Au, and Ag) is the mainstream in primary CO2 reduction systems, but their large overpotential induces a decrease in energy conversion efficiency. Recently, it has been discovered that carbon-supported Pt can make a game change to reduce CO2 to CH4 electrocatalytically without overpotential; however, its faradaic efficiency remains only 12.3% thus far. One approach is to investigate the role of carbon supports for improving the efficiency. In this study, improved CO2 reduction was carried out by employing a Pt-black electrocatalyst without a carbon support in a polymer electrolyte membrane electrolyzer cell. When supplying CO2 diluted by Ar gas at CO2 concentrations of 4-7 vol.%, the efficient CH4 generation was observed. The reason behind the improved production of CH4 occurs by a Langmuir-Hinshelwood mechanism associated with adsorbed CO (COads) and H (Hads) on the Pt electrocatalyst. Moreover, a high-density COads environment (surface) can be created at the Pt-black catalyst, achieving CH4 generation with a faradaic efficiency of 23.2% at 0.18 V vs RHE. Therefore, this study succeeded in improving the faradaic efficiency of CH4 production from CO2 reduction without overpotential using a Pt-black electrocatalyst." @default.
- W4220737418 created "2022-04-03" @default.
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- W4220737418 date "2022-03-11" @default.
- W4220737418 modified "2023-10-04" @default.
- W4220737418 title "Electroreduction of <scp> CO <sub>2</sub> </scp> to <scp> CH <sub>4</sub> </scp> without overpotential using <scp>Pt‐black</scp> catalysts: Enhancement of faradaic efficiency" @default.
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- W4220737418 doi "https://doi.org/10.1002/er.7836" @default.
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