MIT researchers have developed a new method to extract pure hydrogen from ammonia using electrochemical techniques that operate at much lower temperatures than traditional methods. Ammonia (NH₃), a compound made of nitrogen and hydrogen, is seen as a promising way to store and transport hydrogen because it's easier to handle than hydrogen gas itself. However, breaking ammonia into hydrogen and nitrogen usually requires high temperatures and extra purification steps. The new method uses electricity to release hydrogen from ammonia and directly concentrate it into a high-purity form, reducing both the energy and temperature needed for the process. At the heart of this method is a system that combines a hydrogen-selective membrane made of palladium with a hydrogen-generating electrode. This setup is connected by a molten hydroxide electrolyte, a liquid that conducts electricity. The process starts with a catalyst containing elements like ruthenium and cesium, which help break ammonia into hydrogen and nitrogen. The hydrogen then moves toward the palladium membrane, which only allows hydrogen to pass through. On the other side of the membrane, the electrochemical setup creates a kind of "pull" that draws hydrogen across the membrane. This process also converts hydrogen into protons and electrons, which travel separately through the electrolyte and an external circuit before reuniting at a second electrode to form pure hydrogen gas. This method can operate at temperatures around 200°C or 300°C, which is significantly lower than the high temperatures typically needed for traditional ammonia cracking. It also eliminates the need for a separate purification step, which usually requires extra energy. The researchers believe this technology could be useful in various applications, including powering vehicles like cars, buses, and ships, or in manufacturing semiconductors and electronics. In semiconductor production, pure hydrogen is essential for improving efficiency and reducing defects on the surface of materials. Curtis Berlinguette, a chemistry professor at the University of British Columbia, praised the method as a "powerful new way" to extract pure hydrogen from ammonia and similar compounds. However, the team is still working to reduce the amount of palladium needed for the membrane, as the metal is costly. They are also exploring ways to scale up the process and apply it to other reactions that could be valuable in industry.