Ultrathin nickel sulfide nanosheets for sulfur ion electrooxidation assisted acetonitrile electroreduction

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Science China Chemistry Pub Date : 2024-11-12 DOI:10.1007/s11426-024-2279-2

Xiao-Hui Wang, Ze-Nong Zhang, Na Li, Xuan Ai, Xue Xiao, Yu Chen, Shu-Ni Li

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引用次数: 0

Abstract

Electrochemical reduction of acetonitrile (ACN) to ethylamine (ETA) is a new strategy for producing high-value chemicals. Herein, the ultrathin nickel sulfide nanosheets (Ni_xS_y NSs) anchored on nickel foam (NF) nanohybrid (Ni_xS_y NSs/NF) were designed as an efficient bifunctional electrocatalyst for the waste conversion. Owing to the introduction of the S element, the ultrathin nanosheet structure, and the three-dimensional architecture, Ni_xS_y NSs/NF simultaneously reveals excellent electrocatalytic activity for both electrochemical ACN reduction reaction (EACNRR) at the cathode and electrochemical sulfur ion (S²⁻) oxidation reaction (ESOR) at the anode. For the EACNRR, Ni_xS_y NSs/NF exhibits a Faradaic efficiency of 95.5% and the ETA yield of 923.1 mmol h⁻¹ g⁻¹ at −0.05 V potential. For the ESOR, the S²⁻ ion is oxidized to the value-added S₈ product, in which the oxidation potential is only 0.16 V at 50 mA cm⁻². Consequently, the assembled Ni_xS_y NSs/NF∥Ni_xS_y NSs/NF electrolytic cell is successfully established for the ESOR-assisted EACNRR system that only needs a cell voltage of 0.32 V to reach the 50 mA cm⁻² current density. This work provides an effective and energy-saving strategy for the co-production of value-added chemicals from pollutants.

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.