Recent progress in heteroatom doped carbon based electrocatalysts for oxygen reduction reaction in anion exchange membrane fuel cells
Recent progress in heteroatom doped carbon based electrocatalysts for oxygen reduction reaction in anion exchange membrane fuel cells
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DOI：
10.1016/j.ijhydene.2022.10.177
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发表时间：
2022-11
影响因子：
7.2
通讯作者：
Rambabu Gutru;Zarina Turtayeva;F. Xu;G. Maranzana;Ravikumar Thimmappa;M. Mamlouk;A. Desforges;
中科院分区：
文献类型：
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作者：
Rambabu Gutru;Zarina Turtayeva;F. Xu;G. Maranzana;Ravikumar Thimmappa;M. Mamlouk;A. Desforges;
氧还原反应(ORR)是燃料电池、金属-空气电池等电化学器件中的关键步骤。然而，反应在需要铂基催化剂的显著过电位下进行。铂的稀缺性和经济挑战是该设备商业化的主要限制之一。在这种背景下，电化学研究界正在不断探索其他低成本和富含稀土的材料作为ORR催化剂。碳纳米材料具有优良的电子导电性和较高的比表面积，被认为是很有前途的电催化剂。然而，碳的低活性是制约ORR催化剂制备的主要因素。最近的研究证明，碳网络的化学修饰(外国原子的取代，例如，Ex：N，S，B，F，P)可以改变碳纳米材料对ORR的反应性。人们提出了多种掺杂策略，包括单原子掺杂、共掺杂和多原子掺杂。杂原子掺杂碳在碱性介质中对ORR有很好的应用前景。本文对掺杂方法和杂原子掺杂碳的电化学性质进行了合理的探讨，并相信这一综述将为未来设计先进的ORR非贵金属催化剂提供指导。
Oxygen reduction reaction (ORR) is a key step in many electrochemical devices such as fuel cells and metal-air batteries. However, the reaction proceeds at a significant overpotential requiring Pt-based catalysts. The scarcity and economical challenges associated with Pt is one of the major limitations for the commercialization of the devices. In this context, the electrochemical research community is constantly exploring other low-cost and earth-abundant materials as ORR catalysts. Carbon nanomaterials are identified as promising electrocatalysts due to their superb electronic conductivity together with high specific surface area. However, the low reactivity of carbon is the major limiting factor in the fabrication of ORR catalysts. Recent studies have proved that chemical modification of the carbon network (substitution of foreign atoms, Ex: N, S, B, F, P) could alter the reactivity of carbon nanomaterials for ORR. Many doping strategies have been proposed including single atom doping, co-doping and multi-atom doping. The heteroatom doped carbons have delivered promising results towards ORR in alkaline media. This review presents a rational approach of doping methods and the electrochemical properties of heteroatom doped carbons, and we believe that this review could be a guiding material to design advanced non-noble catalysts for ORR in the coming future.