Fe/N-Doped Carbon Framework Derived from ZIF-8 on Graphene Oxide for Efficient Oxygen Reduction Reaction

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2023-06-20 DOI:10.1007/s13391-023-00441-4

Yating Zhang, Pei He, Dongxian Zhuo, Jianlan Zhang, Nana Zhang, Xiaobo Wang, Gang Lin, Zhenghan Kong

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Abstract

Exploration of highly efficient non-noble metal oxygen reduction reaction (ORR) catalysts is essential for the widespread industrial utilization of fuel cells. Herein, we demonstrated a hierarchical porous catalyst (denoted as Fe-NC-Gs) using a simple stirring and one-step pyrolysis method. ZIF-8-derived N-doped carbon framework loaded on graphene oxide, on which Fe₃O₄ and FeS nanoparticles are uniformly dispersed. In the composite nanostructure, a high surface area (470.58 m² g⁻¹) and hierarchical porous structure were observed. The obtained Fe-NC-G-2 exhibits superior ORR properties. The half-wave potential (E_1/2) and the limiting current density in alkaline media were up to 0.85 V and − 5.39 mA cm⁻², respectively, comparable to the commercially available Pt/C. The four-electron-dominated process was exhibited in the ORR catalysis. It also manifests a better methanol tolerance and electrochemical stability during the chronoamperometry measurement in 0.1 M KOH. These results suggest that the proposed strategy provides a new pathway to construct efficient electrocatalysts for ORR.

Graphical Abstract

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氧化石墨烯上ZIF-8衍生的Fe/N掺杂碳框架用于有效的氧还原反应

探索高效的非贵金属氧还原反应（ORR）催化剂对于燃料电池的广泛工业应用至关重要。在此，我们采用简单的搅拌和一步热解方法，展示了一种分层多孔催化剂（称为 Fe-NC-Gs）。ZIF-8 衍生的掺杂 N 的碳框架负载在氧化石墨烯上，Fe3O4 和 FeS 纳米颗粒均匀地分散在其上。在该复合纳米结构中，观察到了高比表面积（470.58 m2 g-1）和分层多孔结构。获得的 Fe-NC-G-2 具有优异的 ORR 性能。在碱性介质中的半波电位（E1/2）和极限电流密度分别高达 0.85 V 和 - 5.39 mA cm-2，与市售的 Pt/C 相当。在 ORR 催化过程中，呈现出四电子主导的过程。在 0.1 M KOH 中进行计时器测量时，它还表现出更好的甲醇耐受性和电化学稳定性。这些结果表明，所提出的策略为构建高效的 ORR 电催化剂提供了一条新途径。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.