Ion liquid treatment for high-performance NiSe/CNT water electrolysis catalyst

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2024-11-15 DOI:10.1016/j.ijhydene.2024.11.142

Jueshuo Fan , Lisha Shen , Chenglin Zhao , Zhida Wang , Zhiming Tu , Jiaxuan Hu , Changfeng Yan

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引用次数: 0

Abstract

Nickel selenide (NiSe) and carbon nanotubes (CNTs) heterojunction structure water electrolysis catalyst was prepared by vapor deposition method, constructing a heterogeneous phase interface between NiSe and CNTs. The interface effect between NiSe and CNTs enhanced further π-electron delocalization of CNTs, increasing the local electron density at the Ni sites. Subsequent ionic liquids (ILs) treatment further resolved the aggregation issues of NiSe nanoparticles and carbon nanotubes, and facilitated further π-electron delocalization at the heterojunction. The imidazolium cations acted as “connectors,” tightly linking the CNTs and NiSe nanoparticles. The NiSe/CNT-IL exhibited an HER overpotential of 82 mV at 10 mA cm⁻² in 1 M KOH. Additionally, as a full water electrolysis catalyst in a water electrolyzer, it achieved a single-cell voltage of 1.965 V at a maximum current density of 500 mA cm⁻² at 60 °C. This direct IL functionalization for CNTs facilitates the electron transfer process and ILs can serve as the electron acceptor with superior hydrogen adsorption.

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用于高性能 NiSe/CNT 水电解催化剂的离子液体处理技术

利用气相沉积法制备了硒化镍（NiSe）和碳纳米管（CNTs）异质结结构水电解催化剂，在硒化镍和碳纳米管之间构建了异质相界面。NiSe 和 CNTs 之间的界面效应进一步增强了 CNTs 的 π 电子析出，提高了 Ni 位点的局部电子密度。随后的离子液体（ILs）处理进一步解决了硒化镍纳米粒子和碳纳米管的聚集问题，并促进了异质结处的π电子脱ocal。咪唑阳离子起着 "连接器 "的作用，将碳纳米管和 NiSe 纳米粒子紧密连接在一起。在 1 M KOH 中，当电流为 10 mA cm-2 时，NiSe/CNT-IL 的 HER 过电位为 82 mV。此外，作为水电解槽中的全水电解催化剂，它在 60 °C 条件下以 500 mA cm-2 的最大电流密度实现了 1.965 V 的单电池电压。这种对 CNTs 的直接 IL 功能化促进了电子转移过程，ILs 可作为电子受体，并具有优异的氢吸附性。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.