Huang Xiaoxiao, Shen Tong, Sun Shengnan, Hou Yanglong
Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD), Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT), Department of Materials Science and Engineering, College of Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China.
ACS Appl Mater Interfaces. 2021 Feb 17;13(6):6989-7003. doi: 10.1021/acsami.0c19922. Epub 2021 Feb 2.
Developing alternatives to noble-metal-based catalysts toward the oxygen reduction reaction (ORR) process plays a key role in the application of low-temperature fuel cells. Carbon-based, precious-metal-free electrocatalysts are of great interest due to their low cost, abundant sources, active catalytic performance, and long-term stability. They are also supposed to feature intrinsically high activity and highly dense catalytic sites along with their sufficient exposure, high conductivity, and high chemical stability, as well as effective mass transfer pathways. In this Review, we focus on carbon-based, precious-metal-free nanocatalysts with synergistic modulation of active-site species and their exposure, mass transfer, and charge transport during the electrochemical process. With this knowledge, perspectives on synergistic modulation strategies are proposed to push forward the development of Pt-free ORR catalysts and the wide application of fuel cells.
开发用于氧还原反应（ORR）过程的贵金属基催化剂替代品在低温燃料电池的应用中起着关键作用。碳基无贵金属电催化剂因其低成本、来源丰富、催化活性高和长期稳定性而备受关注。它们还应具有内在的高活性和高密度催化位点，以及充分的暴露、高导电性、高化学稳定性和有效的传质途径。在本综述中，我们重点关注碳基无贵金属纳米催化剂，这些催化剂在电化学过程中对活性位点物种及其暴露、传质和电荷传输具有协同调控作用。基于这些认识，我们提出了协同调控策略的观点，以推动无铂ORR催化剂的发展和燃料电池的广泛应用。
