Han Xiao-Feng, Batool Nadia, Wang Wen-Tao, Teng Hao-Tian, Zhang Li, Yang Ruizhi, Tian Jing-Hua
College of Energy, Soochow Institute for Energy and Materials Innovations, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China.
ACS Appl Mater Interfaces. 2021 Aug 11;13(31):37133-37141. doi: 10.1021/acsami.1c08839. Epub 2021 Aug 2.
Simple and reliable mass production of platinum-based alloy catalysts with excellent activity and stability is an enormous challenge for the wide commercialization of proton-exchange membrane fuel cells (PEMFC), especially those with ultralow loading of Pt. Herein, an economical, highly durable, and efficient catalyst consisting of structurally ordered intermetallic PtCo alloy nanoparticles with ultralow Pt loading (1.4 wt %) supported on hierarchically porous carbon structure (three-dimensional, 3D PtCo/C) were synthesized with large-scale production by the NaCl-template-assisted approach. The obtained best sample, 3D PtCo/C#1, exhibited mass activities of 11.56 and 0.70 A mg for oxygen reduction reactions (ORRs) in alkaline and acidic electrolytes, which are 60.8 and 6.4 times those of commercial Pt/C, respectively. Furthermore, the 3D PtCo/C#1 exhibited excellent stability both in acidic and alkaline electrolytes, with almost no decay of the half-wave potential after 5000 potential cycles. This work proposes a new high-yielding, simple, and environmentally friendly method to fabricate excellent Pt-based alloy electrocatalysts with ultralow loading of Pt, which opens up new hopes for the development of PEMFC.
对于质子交换膜燃料电池（PEMFC）的广泛商业化，尤其是对于超低Pt负载的PEMFC而言，简单可靠地大规模生产具有优异活性和稳定性的铂基合金催化剂是一项巨大挑战。在此，通过NaCl模板辅助法大规模合成了一种经济、高度耐用且高效的催化剂，该催化剂由负载在分级多孔碳结构（三维，3D PtCo/C）上的具有超低Pt负载（1.4 wt%）的结构有序金属间PtCo合金纳米颗粒组成。所获得的最佳样品3D PtCo/C#1在碱性和酸性电解质中对氧还原反应（ORR）的质量活性分别为11.56和0.70 A mg，分别是商业Pt/C的60.8倍和6.4倍。此外，3D PtCo/C#1在酸性和碱性电解质中均表现出优异的稳定性，在5000次电位循环后半波电位几乎没有衰减。这项工作提出了一种新的高产、简单且环境友好的方法来制备具有超低Pt负载的优异铂基合金电催化剂，为PEMFC的发展开辟了新的希望。
