Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 147, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2020.109678
Keywords
CO2 reduction; Babassu biomass; Silver; Hydrothermal carbon
Funding
- CAPES [183995]
- MCTI/CNPQ/Universal [427084/2018-0]
- FAPEPI [015/2017, 001/2018 FAPEPI]
- Produtividade em Pesquisa-PQ-12/2016 [305632/2016-7]
- Brazilian Nanocarbon Institute of Science and Technology (INCT/Nanocarbono)
- LP5 laboratory of the Universidade Federal de Mato Grosso do Sul - UFMS/MEC - Brazil
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The present study provides an efficient carbon dioxide (CO2) reduction process to produce oxalic acid with approximately 29% faradaic efficiency (based on HPLC) using a carbon material from babassu biomass coupled with silver. A new carbon-silver hybrid material has been prepared from babassu mesocarp by hydrothermal carbonization; this material initiates the electrochemical reduction of CO2 at a lower potential and catalyzes the conversion of CO2 into oxalic acid. To evaluate the catalytic potential of this reaction, other materials, such as glassy carbon and hydrothermal carbon, which generated a higher cathodic current density, were tested at the same potential. The rate of CO2 reduction was found to be increased at low potentials in the presence of the hybrid carbon-silver material synthesized by a one-pot hydrothermal method from babassu biomass in 48 h (Ag@C-48).
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