Electrocatalysis basic Presentation.pptx

basic electrocatalysis

1. Electrocatalysis Accelerating Electrochemical Reactions with Electrocatalysts

2. Introduction • Branch of catalysis focused on electrochemical reactions. • Uses electrocatalysts to speed up reactions. • Plays a key role in energy conversion (fuel cells, water splitting, CO₂ reduction).

3. Principle 1 – Activation Energy & Voltage • Every reaction needs activation energy. • In electrochemistry → linked to electrode potential (voltage). • Electrocatalyst lowers activation energy → reduces overpotential.

4. Principle 2 – Electron Transfer • Core of electrochemical reactions = electron transfer. • Example: Water Splitting - Cathode (reduction): H₂O → H₂ - Anode (oxidation): H₂O → O₂ • Electrocatalyst provides a favorable surface for faster transfer.

5. Principle 3 – Surface Reactions • Electrode surface properties determine reaction efficiency. • Strong binding → slow product release. • Weak binding → poor reactant adsorption. • Balanced binding = efficient catalysis.

6. Summary • Electrocatalysts reduce energy demand & increase reaction rates. • Key factors: 1. Lowering activation energy 2. Facilitating electron transfer 3. Optimizing surface interactions • Crucial for green energy technologies.