Ammonia (NH3) is a major component in fertilizer and a promising carbon-free energy carrier. However, ammonia production consumes around 2 percent of the world's total energy production and releases 500 Mt of carbon dioxide annually. A research team led by scientists at City University of Hong Kong (CityU) developed a new kind of photocatalyst that can produce ammonia from atmospheric nitrogen at room temperature using sunlight. This new method outperformed the conventional way which causes massive carbon emissions. The research team believed that such technology of sustainable ammonia production would advance the development of the future nitrogen economy.

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