Synthesis of Ag and Pt-loaded g-C3N4 nanocomposite catalysts for improved Hydrogen evolution reaction

IF 3.1 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Current Applied Physics Pub Date : 2025-05-28 DOI:10.1016/j.cap.2025.05.013

Aditya Sharma , Harsha Devnani , Jitendra Pal Singh , Mayora Varshney , Hyun Joon Shin

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Abstract

This study reports the synthesis of g-C₃N₄, g-C₃N₄@Ag, and g-C₃N₄@Pt nanocomposites, along with their investigation into the hydrogen evolution reaction (HER). X-ray diffraction results confirmed the formation of pure g-C₃N₄, g-C₃N₄@Ag, and g-C₃N₄@Pt crystalline phases. The estimated crystallite sizes of pure g-C₃N₄, Pt nanoparticles, and Ag nanoparticles are 3.8 nm, 6.4 nm, and 16.4 nm, respectively. Transmission electron microscopy results reveal the 2D sheet morphology of pure g-C₃N₄ and the granular morphology of Ag- and Pt-loaded g-C₃N₄ samples. The electrochemical investigation reveals the superior HER performance of g-C₃N₄@Pt composite, surpassing the pristine g-C₃N₄ alone and g-C₃N₄@Ag. The g-C₃N₄@Pt exhibits a lower overpotential (100 mV at the current density of 10 mA cm⁻²), smaller Tafel slope (77 mV⋅dec⁻¹), and long-term stability tests, which emphasize the practical applicability of these composites under HER conditions.

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Ag和pt负载g-C3N4纳米复合催化剂的合成及其对析氢反应的影响

本研究报道了g-C3N4、g-C3N4@Ag和g-C3N4@Pt纳米复合材料的合成，并对其析氢反应（HER）进行了研究。x射线衍射结果证实了纯g-C3N4、g-C3N4@Ag和g-C3N4@Pt晶相的形成。纯g-C3N4、Pt纳米粒子和Ag纳米粒子的晶粒尺寸分别为3.8 nm、6.4 nm和16.4 nm。透射电镜结果显示了纯g-C3N4的二维片状形貌和Ag和pt负载g-C3N4样品的颗粒形貌。电化学研究表明，g-C3N4@Pt复合材料的HER性能优于单纯的g-C3N4和g-C3N4@Ag。g-C3N4@Pt具有较低的过电位（在电流密度为10 mA cm−2时为100 mV），较小的Tafel斜率（77 mV⋅dec−1）和长期稳定性测试，强调了这些复合材料在HER条件下的实际适用性。

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.