Fabrication of Well-dispersed IrO2 Anchored on rGO Composite for High-performance OER Electrocatalyst Application by Microwave-Assisted Method

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2023-10-17 DOI:10.1007/s12678-023-00844-9

Pyeongkang Yoo, Mino Woo, Hae In Lee, Hee Soo Kim, Dong-Ha Lim

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Abstract

Efficient and cost-effective electrolysis technique is prerequisite for industrial scale hydrogen production. This study demonstrates fabrication of electrochemical catalyst in the form of a composite structure generated through rapid oxidation using microwave (MW) of self-assembled IrO₂ nanoparticles on reduced graphene oxide (rGO). MW-IrO₂/rGO catalysts were synthesized using the microwave-assisted aqueous solution method, and its physical/chemical structure, morphology, and oxygen evolution reaction (OER) properties were evaluated depending on the power of microwave. The composite structure with rGO support and small particle size of IrO₂ allow homogeneous dispersion, and large adsorption area, which dramatically enhances the electron and proton transports. The increased electrochemical surface area resulted in excellent performance of OER. Moreover, this study suggests a simple catalyst preparation method, leading to acceleration of manufacturing speed and cost saving. Thus, this work provides new insights into a facile microwave-assisted rapid oxidation method for efficient electrochemical applications such as PEM electrolysis cells.

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微波辅助法制备高性能OER电催化剂用分散良好的氧化石墨烯锚定IrO2复合材料

高效、经济的电解技术是实现工业规模制氢的前提。本研究展示了利用微波(MW)在还原氧化石墨烯(rGO)上自组装IrO2纳米颗粒快速氧化生成复合结构形式的电化学催化剂。采用微波辅助水溶液法合成了MW-IrO2/rGO催化剂，并根据微波功率对其理化结构、形貌和析氧反应(OER)性能进行了评价。具有还原氧化石墨烯支撑的复合结构和小粒径的IrO2使得分散均匀，吸附面积大，显著增强了电子和质子的输运。电化学表面积的增加使得OER具有优异的性能。此外，本研究提出了一种简单的催化剂制备方法，从而加快了制造速度，节约了成本。因此，这项工作为简便的微波辅助快速氧化方法提供了新的见解，用于高效的电化学应用，如PEM电解电池。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.