Zhao Fengling, Zheng Lirong, Yuan Qiang, Yang Xiaotong, Zhang Qinghua, Xu Han, Guo Yuanlong, Yang Song, Zhou Zhiyou, Gu Lin, Wang Xun
State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou Province, 550025, P. R. China.
Beijing Synchrotron Radiation Facility Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2021 Oct;33(42):e2103383. doi: 10.1002/adma.202103383. Epub 2021 Aug 31.
Ultrathin 2D metal nanostructures have sparked a lot of research interest because of their improved electrocatalytic properties for fuel cells. So far, no effective technique for preparing ultrathin 2D Pd-based metal nanostructures with more than three compositions has been published. Herein, a new visible-light-induced template technique for producing PdAuBiTe alloyed 2D ultrathin nanosheets is developed. The mass activity of the PdAuBiTe nanosheets against the oxygen reduction reaction (ORR) is 2.48 A mg , which is 27.5/17.7 times that of industrial Pd/C/Pt/C, respectively. After 10 000 potential cyclings, there is no decrease in ORR activity. The PdAuBiTe nanosheets exhibit high methanol tolerance and in situ anti-CO poisoning properties. The PdAuBiTe nanosheets, as cathode electrocatalysts in direct methanol fuel cells, can thus give significant improvement in terms of power density and durability. In O /air, the power density can be increased to 235.7/173.5 mW cm , higher than that reported in previous work, and which is 2.32/3.59 times higher than Pt/C.
超薄二维金属纳米结构因其对燃料电池具有改善的电催化性能而引发了大量研究兴趣。到目前为止，尚未发表制备具有三种以上成分的超薄二维钯基金属纳米结构的有效技术。在此，开发了一种用于制备PdAuBiTe合金化二维超薄纳米片的新型可见光诱导模板技术。PdAuBiTe纳米片对氧还原反应（ORR）的质量活性为2.48 A mg ，分别是工业Pd/C/Pt/C的27.5/17.7倍。经过10000次电位循环后，ORR活性没有下降。PdAuBiTe纳米片表现出高甲醇耐受性和原位抗CO中毒性能。因此，PdAuBiTe纳米片作为直接甲醇燃料电池中的阴极电催化剂，在功率密度和耐久性方面可以有显著提高。在O /空气中，功率密度可提高到235.7/173.5 mW cm ，高于先前工作中报道的值，并且分别比Pt/C高2.32/3.59倍。
