Controlled Fabrication of Mo2C/C Nanospheres via Electrospinning Technique as Electrocatalysts for the Hydrogen Evolution Reaction

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-11-21 DOI:10.1007/s10562-024-04845-1

Zexin Wu, Haoyu Zhang, Junyu Zhao, Hongshun Hao, Shuang Yan

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Abstract

A strategy was proposed for the synthesis of Mo₂C/C composite as an efficient electrocatalyst through electrospinning and calcination. PVP and PAN were utilized as electrospinning precursors for comparative analysis. Morphological characterization revealed that an electrospinning solution with the viscosity in the range of 2–5 mPa·S was conducive to the formation of spherical morphology. Under calcination at nitrogen atmosphere, as-electrospun Mo@PVP-1 and Mo@PAN-1 samples transformed into Mo₂C/C with bead-like structure at 900 and 800 °C, respectively. Compared to PVP, PAN exhibited greater resistance to deformation at elevated temperature, resulting in better-dispersed spherical Mo₂C/C composite. The synthesized Mo₂C/C exhibited good electrocatalytic activity for hydrogen evolution reaction. The Tafel slopes of Mo₂C/C prepared from Mo@PVP-1-900 and Mo@PAN-1-800 were 75.85 and 164.7 mV·dec⁻¹, respectively. This work contributes to the understanding of synthetic process of spherical Mo₂C/C composites through electrospinning, providing an effective way to improve material performance.

Graphical Abstract

Mo₂C/C composites were synthesized by calcination with different polymer solutions (PAN and PVP) by electrostatic spraying, and their performance as catalysts was tested.

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通过电纺丝技术受控制备作为氢气进化反应电催化剂的 Mo2C/C 纳米球

提出了一种通过电纺丝和煅烧合成 Mo2C/C 复合材料作为高效电催化剂的策略。比较分析采用 PVP 和 PAN 作为电纺丝前体。形态表征显示，粘度在 2-5 mPa-S 范围内的电纺丝溶液有利于形成球形形态。在氮气环境下煅烧，电纺 Mo@PVP-1 和 Mo@PAN-1 样品分别在 900 ℃ 和 800 ℃ 时转化为具有珠状结构的 Mo2C/C。与 PVP 相比，PAN 在高温下具有更强的抗变形能力，从而形成了分散性更好的球形 Mo2C/C 复合材料。合成的 Mo2C/C 在氢进化反应中表现出良好的电催化活性。由 Mo@PVP-1-900 和 Mo@PAN-1-800 制备的 Mo2C/C 的塔菲尔斜率分别为 75.85 和 164.7 mV-dec-1。该研究有助于理解通过电纺丝合成球形 Mo2C/C 复合材料的过程，为提高材料性能提供了有效途径。图解摘要通过静电喷涂与不同聚合物溶液（PAN 和 PVP）煅烧合成了 Mo2C/C 复合材料，并测试了其作为催化剂的性能。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.