Presentation Title

The potential dependence of SnC for the electrochemical reduction of carbon dioxide to formate

Faculty Mentor

John L. Haan

Start Date

17-11-2018 12:30 PM

End Date

17-11-2018 2:30 PM

Location

CREVELING 8

Session

POSTER 2

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

The need for alternative energy sources that are green, cheap, and easy to be stored is constantly increasing. Wind and solar power are two very common alternative energy sources that are already in use today; however, problems remain with being able to efficiently store this energy for later use when solar and wind energy are unavailable. Converting these alternative energy sources to liquid fuels, such as formate, has emerged as a very promising option for their storage and later use. Metal catalysts, such as tin, have previously been shown to be able to carry out the electrochemical reduction of carbon dioxide to formate. In this work, we present an easier synthesis method for the production of a carbon supported tin nanoparticle catalyst (SnC) that can be used to catalyze the electrochemical reduction of carbon dioxide to formate. The potential dependence for the electrochemical reduction carried out by the SnC catalyst was investigated by conducting a series of reduction reactions across a wide range of potentials, using a potentiostat to apply a constant potential to a three electrode electrochemical cell in a sodium bicarbonate solution. We hypothesized that higher concentrations of formate would be produced at potentials equal to or more negative than the potential at which the SnC surface became reduced than potentials at which the SnC surface was oxidized. Maximal formate production occurred at -0.5V, which was after the surface had been reduced at approximately -0.37V, with performance decreasing at more negative potentials due to the production of hydrogen gas. We also present a new method using LC-UV that was used to quantify the formate produced in the reduction reactions.

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Nov 17th, 12:30 PM Nov 17th, 2:30 PM

The potential dependence of SnC for the electrochemical reduction of carbon dioxide to formate

CREVELING 8

The need for alternative energy sources that are green, cheap, and easy to be stored is constantly increasing. Wind and solar power are two very common alternative energy sources that are already in use today; however, problems remain with being able to efficiently store this energy for later use when solar and wind energy are unavailable. Converting these alternative energy sources to liquid fuels, such as formate, has emerged as a very promising option for their storage and later use. Metal catalysts, such as tin, have previously been shown to be able to carry out the electrochemical reduction of carbon dioxide to formate. In this work, we present an easier synthesis method for the production of a carbon supported tin nanoparticle catalyst (SnC) that can be used to catalyze the electrochemical reduction of carbon dioxide to formate. The potential dependence for the electrochemical reduction carried out by the SnC catalyst was investigated by conducting a series of reduction reactions across a wide range of potentials, using a potentiostat to apply a constant potential to a three electrode electrochemical cell in a sodium bicarbonate solution. We hypothesized that higher concentrations of formate would be produced at potentials equal to or more negative than the potential at which the SnC surface became reduced than potentials at which the SnC surface was oxidized. Maximal formate production occurred at -0.5V, which was after the surface had been reduced at approximately -0.37V, with performance decreasing at more negative potentials due to the production of hydrogen gas. We also present a new method using LC-UV that was used to quantify the formate produced in the reduction reactions.