Electrolysis
Electrolysis refers to chemical reactions where electrical energy is used to drive non-spontaneous oxidation-reduction reactions within an electrolytic cell. This technique has wide applications in industry and energy production, where it may be used to produce hydrogen fuel or process metal materials, and in rechargeable battery systems. The electrochemical series helps predict the products of electrolysis by indicating which ions are likely to be reduced or oxidised, based on their electrode potentials.
Commercial electrolytic cells are designed with specific electrolytes and electrodes to optimise reactions, and they often include systems to remove products as they form. Innovation in electrolysis technologies, such as polymer electrolyte membrane (PEM) electrolysis and artificial photosynthesis, is advancing the production of ‘green’ hydrogen powered by renewable energy sources like solar and wind.
Faraday’s Laws and stoichiometry allow precise calculation of reactants, products, and the current or time needed to achieve specific electrolysis outcomes, ensuring efficiency in industrial applications.
This resource revises electrolysis and within electrolysis there are 5 key concepts:
- Introduction to Electrolysis
- Reactions Electrolytic Cells
- Secondary Cells
- Production of Green Hydrogen
- Faraday’s Laws
To determine if this resource will benefit you, start by answering the following questions.
- How can the electrochemical series be used to predict the products of electrolysis in different solutions or molten salts?
- What are the key design features of commercial electrolytic cells, and how do they influence the efficiency of electrolysis reactions?
- In what ways can innovations in electrolysis, like PEM and artificial photosynthesis, contribute to sustainable energy solutions such as green hydrogen production?