掺杂查耳根杂原子的镍-氮-碳单原子不对称配位催化剂用于高效的二氧化碳电化学还原反应

IF 15.7 1区 化学 Q1 CHEMISTRY, APPLIED Chinese Journal of Catalysis Pub Date : 2024-09-01 DOI:10.1016/S1872-2067(24)60103-8
Jialin Wang , Kaini Zhang , Ta Thi Thuy Nga , Yiqing Wang , Yuchuan Shi , Daixing Wei , Chung-Li Dong , Shaohua Shen
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引用次数: 0

摘要

单原子催化剂(SAC)中中心金属原子的电子构型在电化学二氧化碳还原反应(eCO2RR)中至关重要。在此,我们在对称的镍-氮-碳(Ni-N4-C)构型中加入了查耳根杂原子(如 S、Se 和 Te),从而获得了镍中心原子配位不对称的 Ni-X-N3-C (X: S、Se 和 Te) SACs。在这些获得的 Ni-X-N3-C (X:S、Se 和 Te)SAC 中,Ni-Se-N3-C 表现出卓越的 eCO2RR 活性,与可逆氢电极(RHE)相比,在 -0.70 V 电压下,CO 选择性达到约 98%。原位光谱研究和理论计算表明,掺杂到 Ni-N4-C 构型中的缩醛杂原子会打破配位对称性并引发电荷再分布,进而调节 eCO2RR 的中间行为和热力学反应途径。特别是对于 Ni-Se-N3-C 而言,引入的 Se 原子可显著提高中心 Ni 原子的 d 带中心,从而显著降低 *COOH 形成的速率决定步骤的能垒,这有助于 eCO2RR 通过与氢进化反应竞争而实现高选择性 CO 生产的良好性能。
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Chalcogen heteroatoms doped nickel-nitrogen-carbon single-atom catalysts with asymmetric coordination for efficient electrochemical CO2 reduction

The electronic configuration of central metal atoms in single-atom catalysts (SACs) is pivotal in electrochemical CO2 reduction reaction (eCO2RR). Herein, chalcogen heteroatoms (e.g., S, Se, and Te) were incorporated into the symmetric nickel-nitrogen-carbon (Ni-N4-C) configuration to obtain Ni-X-N3-C (X: S, Se, and Te) SACs with asymmetric coordination presented for central Ni atoms. Among these obtained Ni-X-N3-C (X: S, Se, and Te) SACs, Ni-Se-N3-C exhibited superior eCO2RR activity, with CO selectivity reaching ~98% at −0.70 V versus reversible hydrogen electrode (RHE). The Zn-CO2 battery integrated with Ni-Se-N3-C as cathode and Zn foil as anode achieved a peak power density of 1.82 mW cm–2 and maintained remarkable rechargeable stability over 20 h. In-situ spectral investigations and theoretical calculations demonstrated that the chalcogen heteroatoms doped into the Ni-N4-C configuration would break coordination symmetry and trigger charge redistribution, and then regulate the intermediate behaviors and thermodynamic reaction pathways for eCO2RR. Especially, for Ni-Se-N3-C, the introduced Se atoms could significantly raise the d-band center of central Ni atoms and thus remarkably lower the energy barrier for the rate-determining step of *COOH formation, contributing to the promising eCO2RR performance for high selectivity CO production by competing with hydrogen evolution reaction.

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来源期刊
Chinese Journal of Catalysis
Chinese Journal of Catalysis 工程技术-工程:化工
CiteScore
25.80
自引率
10.30%
发文量
235
审稿时长
1.2 months
期刊介绍: The journal covers a broad scope, encompassing new trends in catalysis for applications in energy production, environmental protection, and the preparation of materials, petroleum chemicals, and fine chemicals. It explores the scientific foundation for preparing and activating catalysts of commercial interest, emphasizing representative models.The focus includes spectroscopic methods for structural characterization, especially in situ techniques, as well as new theoretical methods with practical impact in catalysis and catalytic reactions.The journal delves into the relationship between homogeneous and heterogeneous catalysis and includes theoretical studies on the structure and reactivity of catalysts.Additionally, contributions on photocatalysis, biocatalysis, surface science, and catalysis-related chemical kinetics are welcomed.
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