Revolutionizing Energy: Tailored ZnOFe2O3/rGO for Glucose Oxidation in Fuel Cell Application

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2024-07-27 DOI:10.1002/fuce.202300267

Nur Afifah Mat Razali, Norilhamiah Yahya, Nurul Atiqah Izzati Md Ishak, Nabila A. Karim, Siti Kartom Kamarudin

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引用次数: 0

Abstract

Metal‐based catalysts such as platinum and gold are frequently employed as electrocatalysts. However, they faced significant limitations, including high cost and susceptibility to poisoning and degradation, hindering their extensive utilization. To overcome these challenges, metal oxide offers promising alternatives for its fast electron transfer rate, large surface area, and high electrocatalytic activity in electrochemical oxidation materials. In this work, ZnO doped with Fe2O3 was scattered on reduced graphene oxide (rGO) to form a ZnOFe2O3/rGO hybrid by a hydrothermal method for glucose oxidation. The synthesized ZnOFe2O3/rGO composite was thoroughly characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), and X‐ray photoelectron spectra (XPS) analysis, and the electrochemical performance was evaluated using cyclic voltammetry. ZnO particles are highly uniform flowerlike particles interacting with uniform‐size spherical‐like particles of Fe2O3 in ZnO–Fe2O3 supported on the rGO. The result reveals that interaction between ZnO–Fe2O3 nanocomposites supported onto graphene sheets reduces agglomeration compared to parent nanoparticles. An increase in surface‐to‐volume ratio exhibits more surface‐active sites for electrooxidation and thus improved catalytic performance by a negatively shifted potential of −36.62 mV versus Ag/AgCl, representing appropriate electrocatalysts for use as the anode in glucose fuel cells. The maximum current density of 0.5201 mA cm−2 was achieved in the electrochemical glucose oxidation equipped with ZnOFe2O3/rGO, which was almost 20 and 3 times higher than ZnO and Fe2O3, respectively. The synergistic interaction of ZnO–Fe2O3 supported on rGO showed a vital role as an electrocatalytic mediator to facilitate the charge transfer for glucose oxidation.

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能源革命：用于燃料电池中葡萄糖氧化的定制 ZnOFe2O3/rGO

铂和金等金属催化剂经常被用作电催化剂。然而，它们面临着巨大的局限性，包括成本高、易中毒和降解，阻碍了它们的广泛应用。为了克服这些挑战，金属氧化物因其电子转移速度快、比表面积大、电催化活性高等特点，在电化学氧化材料中提供了很有前景的替代品。本研究采用水热法将掺杂了 Fe2O3 的氧化锌分散在还原氧化石墨烯（rGO）上，形成 ZnOFe2O3/rGO 杂化物，用于葡萄糖氧化。利用场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、傅立叶变换红外光谱（FTIR）、X 射线衍射（XRD）和 X 射线光电子能谱（XPS）分析对合成的 ZnOFe2O3/rGO 复合材料进行了全面表征，并利用循环伏安法对其电化学性能进行了评估。结果表明，在 rGO 上支撑的 ZnO-Fe2O3 中，ZnO 颗粒是高度均匀的花状颗粒，与大小均匀的球状 Fe2O3 颗粒相互作用。结果表明，与母体纳米粒子相比，支撑在石墨烯片上的 ZnO-Fe2O3 纳米复合材料之间的相互作用减少了团聚。表面体积比的增加显示出更多的表面活性电氧化位点，从而提高了催化性能，与 Ag/AgCl 相比，电位负移达 -36.62 mV，是适合用作葡萄糖燃料电池阳极的电催化剂。在使用 ZnOFe2O3/rGO 进行电化学葡萄糖氧化时，达到的最大电流密度为 0.5201 mA cm-2，分别是 ZnO 和 Fe2O3 的近 20 倍和 3 倍。支撑在 rGO 上的 ZnO-Fe2O3 的协同作用显示了其作为电催化介质在促进葡萄糖氧化电荷转移方面的重要作用。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.