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FeS2@TiO2 nanobelt array enabled high-efficiency electrocatalytic nitrate reduction to ammonia
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-11-04 , DOI: 10.1039/d2ta07475c
Haipeng Wang 1, 2 , Donglin Zhao 2 , Chaozhen Liu 3 , Xiaoya Fan 2 , Zerong Li 2 , Yongsong Luo 2 , Dongdong Zheng 2 , Shengjun Sun 4 , Jie Chen 5 , Jing Zhang 6 , Yang Liu 7 , Shuyan Gao 7 , Feng Gong 3 , Xuping Sun 2, 4
Affiliation  

Nitrate (NO3), which exists in both surface water and underground water, is harmful to the environment and human body. Ammonia (NH3) is a kind of necessary produced chemical for industry and daily life. Electrochemical NO3 reduction can eliminate hazardous NO3 and produce value-added NH3 at the same time under ambient conditions but requires efficient catalysts for the NO3 reduction reaction (NO3RR) with high selectivity. Herein, we report on the development of FeS2 nanoparticles on TiO2 nanobelt array (FeS2@TiO2) as an earth-abundant NO3RR electrocatalyst. It shows superior electrocatalytic performance with a large NH3 yield of 860.3 μmol h−1 cm−2 at −0.7 V and a high faradaic efficiency of 97.0% at −0.4 V versus reversible hydrogen electrode in 0.1 M NaOH with 0.1 M NO3. The theoretical calculations reveal the mechanisms of the enhanced NO3RR performance of FeS2@TiO2.

中文翻译:

FeS2@TiO2 纳米带阵列实现高效电催化硝酸盐还原为氨

硝酸盐(NO 3 - )存在于地表水和地下水中,对环境和人体有害。氨(NH 3 )是工业和日常生活必需生产的化学品。电化学 NO 3 -还原可以在环境条件下同时消除有害的 NO 3 -并产生增值的 NH 3,但需要高效的催化剂来进行高选择性的 NO 3 -还原反应 (NO 3 RR)。在此,我们报告了在 TiO 2纳米带阵列 ( FeS 2 @TiO 2) 作为地球上丰富的 NO 3 RR 电催化剂。它显示出优异的电催化性能,在 0.1 M NaOH 和 0.1 M NO 3 −中,NH 3产率高达 860.3 μmol h −1 cm −2,在 −0.4 V 时法拉第效率高达 97.0%,可逆氢电极相比。 . 理论计算揭示了FeS 2 @TiO 2增强NO 3 RR性能的机制。
更新日期:2022-11-04
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