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Bottom-up synthesis of new perovskite material for ammonia production

By Tetsuo Satoh |

Perovskites are a class of synthetic materials that have a crystalline structure similar to that of the naturally occurring mineral calcium titanate. They have been the subject of many studies because they exhibit unique properties that can be tuned according to their composition. One of their potential applications is as catalysts for the synthesis of ammonia. For example, recently, perovskites with some of their oxygen atoms replaced by hydrogen and nitrogen ions have been developed as efficient catalysts for ammonia synthesis. However, the traditional synthesis of perovskites with such substitutions usually has to be carried out at high temperatures (more than 800°C) and over long periods of time (weeks). To address these issues, in a recent study carried out at Tokyo Institute of Technology (TiTech; Yokohama Campus, Japan; www.titech.ac.jp), a group of researchers led by professor Masaaki Kitano devised a novel method for the low-temperature synthesis of one such oxygen-substituted perovskite with the general formula BaCeO3−xNyHz (diagram) and tested its performance as a catalyst to produce ammonia. To achieve this, they made an innovative alteration to the perovskite synthesis process. The use of barium carbonate and cerium…
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