Facile One-Pot Synthesis of Silicon Carbide-Carbon Supported Gold Nanoparticles (Au/SiC-C) as a Durable Electrocatalyst for Electrochemical Oxygen Reduction Reaction

IF 5.4 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
N. Mohanapriya,  and , Naveen Chandrasekaran*, 
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Abstract

This study presents a simple one-pot method to synthesize gold nanoparticles supported on a silicon carbide-carbon nanocomposite (Au/SiC-C) as an efficient electrocatalyst for the oxygen reduction reaction (ORR) in an alkaline medium. The SiC-C support was prepared by carbothermal reduction of an iminosilane-resorcinol (ISR) composite, formed by the reaction of 3-aminopropyl triethoxysilane (APTES) with acetone and resorcinol. During ISR formation, the Au precursor was incorporated to produce ISR-supported gold nanoparticles (Au/ISR), which were subsequently transformed into Au/SiC-C. Here, imine groups in ISR served as reducing agents, eliminating the need for conventional reducing agents to convert Au3+ ions to Au nanoparticles. The formation of Au/ISR and Au/SiC-C was confirmed by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The Au/SiC-C catalyst exhibited effective ORR activity under alkaline conditions, achieving direct 4e transfer with minimal H2O2 production.

Abstract Image

作为电化学氧还原反应持久电催化剂的碳化硅-碳负载金纳米颗粒(Au/SiC-C)的一锅简易合成
本研究提出了一种简单的一锅法,在碱性介质中合成了负载在碳化硅-碳纳米复合材料(Au/SiC-C)上的金纳米粒子作为氧还原反应(ORR)的高效电催化剂。以3-氨基丙基三乙氧基硅烷(APTES)与丙酮和间苯二酚反应生成的亚氨基硅烷-间苯二酚(ISR)复合材料为原料,采用碳热还原法制备了SiC-C载体。在ISR形成过程中,Au前驱体被掺入生成支持ISR的金纳米颗粒(Au/ISR),这些纳米颗粒随后转化为Au/SiC-C。在这里,ISR中的亚胺基团作为还原剂,消除了传统还原剂将Au3+离子转化为Au纳米颗粒的需要。通过x射线衍射(XRD)、x射线光电子能谱(XPS)和拉曼光谱证实了Au/ISR和Au/SiC-C的形成。Au/SiC-C催化剂在碱性条件下表现出有效的ORR活性,以最小的H2O2产量实现了4e -的直接转移。
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来源期刊
ACS Applied Energy Materials
ACS Applied Energy Materials Materials Science-Materials Chemistry
CiteScore
10.30
自引率
6.20%
发文量
1368
期刊介绍: ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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