How does a methanol fuel cell work?

A direct methanol fuel cell is a variant of a proton exchange membrane fuel cell that uses methanol directly without prior reforming. Methanol is converted to carbon dioxide, protons and electrons at the anode. Like a standard proton exchange membrane fuel cell, protons react with oxygen at the cathode through a proton exchange membrane, and electrons pass through an external circuit to the cathode and work.

Basic conditions Total reaction formula: 2CH4O + 3O2 + 4OH-= 2CO32- + 6H2O

Positive electrode: O2 + 4e(-)+ 2H20 → 4OH(-)

Negative electrode: CH4O - 6e(-) + 8OH(-) → CO3(2-) + 6H2O

Acidic condition 2CH4O +3O2→2CO2+4H2O

Positive electrode: O2 + 4e(-) + 4H(+) → 2H2O

Negative electrode: CH4O - 6e(-) + H2O → 6H(+) + CO2

The battery has a desired operating temperature of 120 ° C or less, which is slightly higher than a standard proton exchange membrane fuel cell, and its efficiency is about 40%.

A direct methanol fuel cell is a variant of a proton exchange membrane fuel cell that uses methanol directly without prior reforming. Methanol is converted to carbon dioxide and hydrogen at the anode, and like a standard proton exchange membrane fuel cell, hydrogen is then reacted with oxygen.

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