Rational Construction of Heterostructured Cu<sub>3</sub>P@TiO<sub>2</sub> Nanoarray for High‐Efficiency Electrochemical Nitrite Reduction to Ammonia
Zhengwei Cai, Donglin Zhao, Xiaoya Fan, Longcheng Zhang, Jie Liang, Zixiao Li, Jun Li, Yongsong Luo, Dongdong Zheng, Yan Wang, Tingshuai Li, Hong Yan, Hong Yan, Binwu Ying, Shengjun Sun, Abdulmohsen Ali Alshehri, Hong Yan, Hong Yan, Jia Xu, Qingquan Kong, Xuping Sun
Abstract
Abstract Electroreduction of nitrite (NO 2 − ) to valuable ammonia (NH 3 ) offers a sustainable and green approach for NH 3 synthesis. Here, a Cu 3 P@TiO 2 heterostructure is rationally constructed as an active catalyst for selective NO 2 − ‐to‐NH 3 electroreduction, with rich nanosized Cu 3 P anchored on a TiO 2 nanoribbon array on Ti plate (Cu 3 P@TiO 2 /TP). When performed in the 0.1 m NaOH with 0.1 m NaNO 2 , the Cu 3 P@TiO 2 /TP electrode obtains a large NH 3 yield of 1583.4 µmol h −1 cm −2 and a high Faradaic efficiency of 97.1%. More importantly, Cu 3 P@TiO 2 /TP also delivers remarkable long‐term stability for 50 h electrolysis. Theoretical calculations indicate that intermediate adsorption/conversion processes on Cu 3 P@TiO 2 interfaces are synergistically optimized, substantially facilitating the conversion of NO 2 − ‐to‐NH 3 .