Ren Yangyang, Zang Zehao, Lv Chenhao, Li Beibei, Li Lanlan, Yang Xiaojing, Lu Zunming, Yu Xiaofei, Zhang Xinghua
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
J Colloid Interface Sci. 2023 Jun 15;640:801-808. doi: 10.1016/j.jcis.2023.03.026. Epub 2023 Mar 7.
Developing highly durable and active catalysts with the morphology of structurally robust nanoframes toward oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) in acidic environment is crucial but still a great challenge to completely achieve in a single material. Herein, PtCuCo nanoframes (PtCuCo NFs) with internal support structures as enhanced bifunctional electrocatalysts were prepared by a facile one-pot approach. PtCuCo NFs exhibited remarkable activity and durability for ORR and MOR owing to the ternary compositions and the structure-fortifying frame structures. Impressively, the specific/mass activity of PtCuCo NFs were 12.8/7.5 times as large as that of commercial Pt/C for ORR in perchloric acid solution. For MOR in sulfuric acid solution, the mass/specific activity of PtCuCo NFs was 1.66 A mg/4.24 mA cm, which was 5.4/9.4 times as large as that of Pt/C. This work may provide a promising nanoframe material to develop dual catalysts for fuel cells.
开发在酸性环境中对氧还原反应（ORR）和甲醇氧化反应（MOR）具有高度耐久性和活性、且具有结构坚固的纳米框架形态的催化剂至关重要，但要在单一材料中完全实现仍然是一个巨大的挑战。在此，通过简便的一锅法制备了具有内部支撑结构的PtCuCo纳米框架（PtCuCo NFs）作为增强型双功能电催化剂。由于三元组成和强化结构的框架结构，PtCuCo NFs对ORR和MOR表现出显著的活性和耐久性。令人印象深刻的是，在高氯酸溶液中，PtCuCo NFs的比活性/质量活性是商业Pt/C对ORR的12.8/7.5倍。对于硫酸溶液中的MOR，PtCuCo NFs的质量活性/比活性为1.66 A mg/4.24 mA cm，分别是Pt/C的5.4/9.4倍。这项工作可能为开发用于燃料电池的双催化剂提供一种有前景的纳米框架材料。
