纳米片
催化作用
材料科学
电合成
氮化硼
密度泛函理论
吸附
纳米团簇
无机化学
化学工程
化学
电化学
纳米技术
计算化学
物理化学
有机化学
电极
工程类
作者
Lingyi Kong,Dongxu Jiao,Zhongxu Wang,Yuejie Liu,Yu Shang,Lichang Yin,Qinghai Cai,Jingxiang Zhao
标识
DOI:10.1016/j.cej.2022.138885
摘要
Urea electrosynthesis under ambient conditions has been emerging as a sustainable strategy to replace the harsh industrial process, in which the activation of the inert N2 molecule and the then CN coupling still remain the huge challenge due to the lack of advanced electrocatalysts with multiple active sites. Here, by means of density functional theory (DFT) computations, a new family of electrocatalysts with asymmetrical triple active sites was proposed to boost urea production by anchoring single metal atoms on porous boron nitride nanosheet with divacancy (M/p-BN). Through the high-throughput screening, we found that the anchored Fe and Co atoms exhibit satisfied catalytic activity for urea formation with low limiting potentials, moderate kinetic barriers for CN coupling reaction, and excellent suppressing effect on the side reactions, in which Fe/Co and their adjacent two B atoms perform as collaborative adsorption sites. Furthermore, the high activity of the two promising catalysts can be well rationalized by their optimal binding strength with the NCON* species, which is mainly determined by the intrinsic charge distribution on the active sites. This work suggested that the anchoring of a single metal atom can highly activate BN nanosheet to achieve multiple active sites, which opens a new avenue to develop novel and efficient catalysts for other electrocatalytic reactions.
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