Enhanced electrocatalytic nitrite reduction to ammonia over P-doped TiO nanobelt array

Electrochemical nitrite reduction affords an eco-friendly route for the removal of hazardous NO 2 − and sustainable NH 3 synthesis. Here, we report that a P-doped TiO 2 nanobelt array supported on titanium plate (P-TiO 2 /TP) acts as a high-efficiency electrocatalyst for the NO 2 − reduction reaction, attaining a satisfactory faradaic efficiency of 90.6% and a large NH 3 yield as high as 560.8 μmol h −1 cm −2 , superior to pristine TiO 2 /TP. Moreover, the catalytic mechanism involved is also uncovered by theoretical calculation. P-doped TiO 2 nanobelt array supported on titanium plate acts as a high efficiency electrocatalyst for NO 2 − reduction reaction, attaining a satisfactory faradaic efficiency of 90.6% and a large NH 3 yield as high as 560.8 μmol h −1 cm −2 .