甲醇氧化碳陶瓷电极表面LDH/ mof纳米复合材料的电合成/化学原位生长

IF 2.6 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2025-05-31 DOI:10.1007/s11581-025-06391-1
Biuck Habibi, Ali Pashazadeh, Sara Pashazadeh
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引用次数: 0

摘要

在本研究中,我们通过在碳陶瓷电极(CCE)表面电化学沉积Ni/Al层状双氢氧化物(LDH)和金属有机骨架(mof),并在温和条件下化学原位生长Ni/Zn/Al LDH- mof纳米复合材料,开发了Ni/Zn/Al层状双氢氧化物(LDH)和金属有机骨架(mof)的纳米复合材料。采用一系列仪器方法对Ni/Zn/Al LDH-MOF纳米复合材料改性CCE进行了分析。然后,利用Ni/Zn/Al ldh - mof /CCE在碱性溶液中进行甲醇的电催化氧化。Ni/Zn/Al ldh - mof /CCE在0.1 M氢氧化钠溶液中对甲醇氧化的电催化活性增强,阳极峰值电流密度与甲醇浓度成正比。在电化学研究的基础上,测定了Ni/Zn/Al LDH-MOF/CCE下甲醇氧化反应的电子传递系数(α)和催化速率常数(kcat): α = 0.35, kcat = 6.77 × 104 cm3 mol−1 s−1。采用准稳态极化方法研究了Ni/Zn/Al ldh - mof /CCE上甲醇的电催化氧化反应,并确定了一些电氧化反应参数。得到的值如下:k2Г* = 1.87 × 10−9 cm s−1,k0−1/k01 = 1.8 × 107。这些发现表明,在Ni/Al LDH中加入Zn离子和mof以及纳米复合材料的构建显著提高了所得到的电催化剂的电催化性能,为开发用于直接甲醇燃料电池的高效阳极材料铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electrosynthesis/chemical in situ growth of the LDH/MOFs nanocomposite at the surface of carbon ceramic electrode for methanol oxidation reaction

In this study, we developed a nanocomposite of Ni/Zn/Al-layered double hydroxide (LDH) and metal–organic frameworks (MOFs) through the electrochemical deposition of the Ni/Al LDH at the surface of the carbon ceramic electrode (CCE) and chemical in situ growth of Ni/Zn/Al LDH-MOF nanocomposite under mild conditions. The Ni/Zn/Al LDH-MOF nanocomposite modified CCE was analyzed using a range of instrumental methods. Then, the Ni/Zn/Al LDH-MOFs/CCE was employed for the electrocatalytic oxidation of methanol in alkaline solution. The Ni/Zn/Al LDH-MOFs/CCE shows enhanced electrocatalytic activity in 0.1 M sodium hydroxide toward the oxidation of methanol, with anodic peak current density proportional to methanol concentration. In continuation of electrochemical studies, the electron transfer coefficient (α) and the catalytic rate constant (kcat) for the methanol oxidation reaction at the Ni/Zn/Al LDH-MOF/CCE were measured: α = 0.35 and kcat = 6.77 × 104 cm3 mol−1 s−1. The pseudo steady-state polarization method was employed to investigate the electrocatalytic oxidation of methanol at the Ni/Zn/Al LDH-MOFs/CCE, as well as to determine some electrooxidation reaction parameters. The obtained values include the following: k2Г* = 1.87 × 10−9 cm s−1 and the ratio of k0−1/k01 = 1.8 × 107. These findings indicated that the incorporation of the Zn ions and MOFs into the Ni/Al LDH and the construction of the nanocomposite significantly enhanced the electrocatalytic performance of the resulting electrocatalyst, paving the way for the development of a highly efficient anodic material for direct methanol fuel cell applications.

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来源期刊
Ionics
Ionics 化学-电化学
CiteScore
5.30
自引率
7.10%
发文量
427
审稿时长
2.2 months
期刊介绍: Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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