Electrochemical ammonia oxidation process through active chlorine has been proposed as a potentially effective method for ammonia removal. Currently, most of the anodes require to use high-stable TiO loaded with large particles of noble metal Ru or Ir, which have low activity and high cost. Herein, we prepare ultrasmall and uniform metal nanoparticles of Ir on TiO to remove ammonia. Moreover, we use non-noble metal Fe to replace noble metals. The ammonia removal efficiency of Fe/TiO under 2 V Ag / AgCl during 2 h is 100 % and 94 % of ammonia is converted to N. The Fe/TiO anodes not only have higher catalytic activity but also show excellent stability and reusability. Fe/TiO anodes still exhibit excellence activity and selectivity after 1 year. As a common metal, Fe will have more application space than iridium in ammonia removal for its low cost and selectively high efficiency.

中文翻译：

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超细Ir纳米颗粒和非贵金属Fe纳米颗粒修饰的二氧化钛纳米棒阵列选择性电催化氧化氨制氮

通过活性氯进行的电化学氨氧化过程已被提出作为一种潜在有效的氨去除方法。目前，大多数阳极需要使用负载大颗粒贵金属Ru或Ir的高稳定性TiO，其活性低且成本高。在此，我们在 TiO 上制备了超小且均匀的 Ir 金属纳米颗粒来去除氨。此外，我们使用非贵金属Fe来代替贵金属。 Fe/TiO在2 V Ag/AgCl条件下2 h的氨去除效率为100%，94%的氨转化为N。Fe/TiO阳极不仅具有较高的催化活性，而且表现出优异的稳定性和可重复使用性。 Fe/TiO 阳极在一年后仍然表现出优异的活性和选择性。 Fe作为一种常见金属，以其成本低、选择性高的特点，在除氨方面将比铱有更大的应用空间。