Scholarlink

<p>This study introduces a novel and innovative approach by designing a trimetallic nanocomposite catalyst for enhancing the ORR. The unique trimetallic structure significantly improves catalytic performance and clearly distinguishes this work from previous studies. Compared to conventional platinum-based and bimetallic catalysts, this trimetallic system offers superior activity, enhanced stability, and better resistance to degradation, making it a promising candidate for high-performance electrocatalytic applications. In this study, MoS<sub>2</sub>/reduced graphene oxide (MoS<sub>2</sub>/rGO) nanosheets are synthesized via a hydrothermal method, followed by the deposition of copper-cobalt-iron (CuCoFe) transition trimetallic hybrids onto the ultrathin MoS<sub>2</sub>/rGO substrate through a straightforward ethylene glycol reduction process. Transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) analysis confirms the uniform distribution and consistent dispersion of CuCoFe nanoparticles on the catalyst support surface. The nanocomposite demonstrates exceptional catalytic performance for the ORR under alkaline conditions, attributed to the synergistic interaction between CuCoFe trimetallic alloys and the MoS<sub>2</sub>/rGO substrate. Key electrochemical metrics include a high current density of 3.64&#xa0;mA&#xa0;cm<sup>−2</sup>, a half-wave potential of − 0.118&#xa0;V vs. Ag/AgCl, and an onset potential of − 0.052&#xa0;V vs. Ag/AgCl. Moreover, the CuCoFeMoS<sub>2</sub>/rGO electrode exhibits remarkable durability (90.03%) and methanol resistance (100%), significantly outperforming the Pt/C benchmark (61.58% and 79.96%, respectively). The analysis of the Koutecky–Levich (K–L) plots indicates a four-electron transfer process. The synergistic effects of rGO’s excellent conductivity and high aspect ratio, alongside MoS<sub>2</sub>’s catalytic properties and the introduction of CuCoFe transition trimetallic hybrids, position CuCoFeMoS<sub>2</sub>/rGO as a promising candidate for high-performance electrocatalytic applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

CoCuFe-MoS2/rGO as pioneer electrocatalyst for the oxygen reduction reaction (ORR)

  • 期刊论文

  • 发表日期：

    2025年9月18日

查看全文
  • Adeleh Jafari Zarandini,
  • Ali Bahari,
  • Hajar Rajaei Litkohi

摘要

This study introduces a novel and innovative approach by designing a trimetallic nanocomposite catalyst for enhancing the ORR. The unique trimetallic structure significantly improves catalytic performance and clearly distinguishes this work from previous studies. Compared to conventional platinum-based and bimetallic catalysts, this trimetallic system offers superior activity, enhanced stability, and better resistance to degradation, making it a promising candidate for high-performance electrocatalytic applications. In this study, MoS2/reduced graphene oxide (MoS2/rGO) nanosheets are synthesized via a hydrothermal method, followed by the deposition of copper-cobalt-iron (CuCoFe) transition trimetallic hybrids onto the ultrathin MoS2/rGO substrate through a straightforward ethylene glycol reduction process. Transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) analysis confirms the uniform distribution and consistent dispersion of CuCoFe nanoparticles on the catalyst support surface. The nanocomposite demonstrates exceptional catalytic performance for the ORR under alkaline conditions, attributed to the synergistic interaction between CuCoFe trimetallic alloys and the MoS2/rGO substrate. Key electrochemical metrics include a high current density of 3.64 mA cm−2, a half-wave potential of − 0.118 V vs. Ag/AgCl, and an onset potential of − 0.052 V vs. Ag/AgCl. Moreover, the CuCoFeMoS2/rGO electrode exhibits remarkable durability (90.03%) and methanol resistance (100%), significantly outperforming the Pt/C benchmark (61.58% and 79.96%, respectively). The analysis of the Koutecky–Levich (K–L) plots indicates a four-electron transfer process. The synergistic effects of rGO’s excellent conductivity and high aspect ratio, alongside MoS2’s catalytic properties and the introduction of CuCoFe transition trimetallic hybrids, position CuCoFeMoS2/rGO as a promising candidate for high-performance electrocatalytic applications.