Amorphous Boron Carbide on Titanium Dioxide Nanobelt Arrays for High‐Efficiency Electrocatalytic NO Reduction to NH<sub>3</sub>
Jie Liang, Pengyu Liu, Qinye Li, Tingshuai Li, Luchao Yue, Yongsong Luo, Qian Liu, Na Li, Bo Tang, Abdulmohsen Ali Alshehri, Imran Shakir, Philips O. Agboola, Chenghua Sun, Xuping Sun
Abstract
Abstract Electrocatalytic NO reduction is regarded as an attractive strategy to degrade the NO contaminant into useful NH 3 , but the lack of efficient and stable electrocatalysts to facilitate such multiple proton‐coupled electron‐transfer processes impedes its applications. Here, we report on developing amorphous B 2.6 C supported on a TiO 2 nanoarray on a Ti plate (a‐B 2.6 C@TiO 2 /Ti) as an NH 3 ‐producing nanocatalyst with appreciable activity and durability toward the NO electroreduction. It shows a yield of 3678.6 μg h −1 cm −2 and a FE of 87.6 %, superior to TiO 2 /Ti (563.5 μg h −1 cm −2 , 42.6 %) and a‐B 2.6 C/Ti (2499.2 μg h −1 cm −2 , 85.6 %). An a‐B 2.6 C@TiO 2 /Ti‐based Zn−NO battery achieves a power density of 1.7 mW cm −2 with an NH 3 yield of 1125 μg h −1 cm −2 . An in‐depth understanding of catalytic mechanisms is gained by theoretical calculations.