Hydrogen Fuel Cells Can Achieve Higher Efficiency with a Certain Dose of Caffeines are not the only ones who can enhance performance through caffeine intake.
New research suggests that adding caffeine to hydrogen fuel cells can improve their efficiency and reduce the demand for platinum in the electrodes. Platinum is an expensive and rare metal, so reducing its requirement can lower the overall costs.
Japanese researchers state that significant cost reductions can be achieved when the amount of platinum needed for producing high-efficiency hydrogen fuel cells is reduced. In fact, the demand for rare metals is one of the challenges in keeping the cost of hydrogen usage within an affordable range.
The researchers state that they have found one key to reducing the required amount of platinum in the electrodes is by adding caffeine. These devices become more efficient and therefore more affordable.
The study shows that the catalytic activity of the fuel cell cathode becomes more effective when a certain amount of caffeine is used.
To use hydrogen in one of these modules, the gas undergoes oxidation at the anode, producing hydrogen ions and electrons. The ions move to the cathode, while the electrons travel through an external circuit, generating electricity. At the cathode, the ions and electrons combine with oxygen, producing water-usually in the form of vapor.
In other words, water has an impact on the performance of hydrogen fuel cells as it reacts with platinum, forming a layer of platinum hydroxide (PtOH) on the electrode, which interferes with the oxygen reduction reaction (ORR) catalysis and reduces efficiency, the researchers say.
Therefore, a higher loading of platinum (higher platinum content) is required to maintain efficiency within the device. Since the current price of platinum is far above $925 per ounce (at the time of writing), using more platinum easily leads to skyrocketing manufacturing costs of platinum itself.
However, the researchers have discovered that by adding caffeine, the ORR activity in platinum electrodes can be increased by 11 times, significantly enhancing reaction efficiency. This can dramatically reduce the amount of platinum required for effective reactions and lower manufacturing costs.
