Diagram showing the movement of hydrogen, oxygen and electrons in a hydrogen-oxygen fuel cell
2H2 (g) + 4OH– (aq) → 4H2O (l) + 4e– Eꝋ = -0.83 V
O2 (g) + 2H2O + 4e– → 4OH– (aq) Eꝋ = +0.40 V
2H2 (g) + 4OH– (aq) + O2 (g) + 2H2O + 4e– → 42H2O (l) + 4e– + 4OH– (aq)
2H2 (g) + O2 (g) → 2H2O (l) Eꝋ = +1.23 V
Benefits
Risks and problems
One difference between fuel cells and other cells is that the cell operates continuously as long as there is a supply of hydrogen and oxygen; the energy is not stored in the cell.
转载自savemyexams
翰林课程体验,退费流程快速投诉邮箱: yuxi@linstitute.net 沪ICP备2023009024号-1