探索氧气电还原的无金属二维电催化剂

Joyjit Kundu, Taehyun Kwon, Kwangyeol Lee, Sang-Il Choi
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引用次数: 0

摘要

在燃料电池和金属-空气电池的发展过程中,为氧还原反应(ORR)开发经济实惠、随时可用的电催化剂至关重要。最近,二维非金属材料作为 ORR 催化剂的可行替代品受到了广泛关注,因为它们具有成本低、可用性强、表面体积比大、电导率高、耐久性好和活性强等多方面优势。在无金属二维材料中观察到的增强 ORR 性能通常来自杂原子掺杂、缺陷或异质结构的形成。在此,作者围绕无金属二维材料,深入探讨了 ORR 的电催化剂领域。首先,作者探讨了无金属二维材料的优点,并剖析了 ORR 的反应机理。随后,对各种无金属二维材料进行了全面考察,追溯了它们在 ORR 背景下从基本概念到实际应用的演变历程。对各种增强无金属二维材料的策略进行了深入探讨,并评估了这些策略对材料固有性能(包括电子特性)的影响。最后,还强调了无金属二维材料面临的挑战和未来前景,因为它们希望成为高效的 ORR 电催化剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Exploration of metal-free 2D electrocatalysts toward the oxygen electroreduction

Exploration of metal-free 2D electrocatalysts toward the oxygen electroreduction

The advancement of economical and readily available electrocatalysts for the oxygen reduction reaction (ORR) holds paramount importance in the advancement of fuel cells and metal-air batteries. Recently, 2D non-metallic materials have obtained substantial attention as viable alternatives for ORR catalysts due to their manifold advantages, encompassing low cost, ample availability, substantial surface-to-volume ratio, high conductivity, exceptional durability, and competitive activity. The augmented ORR performances observed in metal-free 2D materials typically arise from heteroatom doping, defects, or the formation of heterostructures. Here, the authors delve into the realm of electrocatalysts for the ORR, pivoting around metal-free 2D materials. Initially, the merits of metal-free 2D materials are explored and the reaction mechanism of the ORR is dissected. Subsequently, a comprehensive survey of diverse metal-free 2D materials is presented, tracing their evolutionary journey from fundamental concepts to pragmatic applications in the context of ORR. Substantial importance is given on the exploration of various strategies for enhancing metal-free 2D materials and assessing their impact on inherent material performance, including electronic properties. Finally, the challenges and future prospects that lie ahead for metal-free 2D materials are underscored, as they aspire to serve as efficient ORR electrocatalysts.

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