Wang Dongqiong, Zhang Yangping, Zhang Kewang, Wang Xiaomei, Wang Caiqin, Li Zhuolin, Gao Fei, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
School of Chemical Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
J Colloid Interface Sci. 2023 Nov 15;650(Pt A):350-357. doi: 10.1016/j.jcis.2023.06.213. Epub 2023 Jul 1.
Bimetallic two-dimensional (2D) nanomaterials are widely used in electrocatalysis owing to their unique physicochemical properties, while trimetallic 2D materials of porous structures with large surface area are rarely reported. In this paper, a one-pot hydrothermal synthesis of ternary ultra-thin PdPtNi nanosheets is developed. By adjusting the volume ratio of the mixed solvents, PdPtNi with porous nanosheets (PNSs) and ultrathin nanosheets (UNSs) was prepared. The growth mechanism of PNSs was investigated through a series of control experiments. Notably, thanks to the high atom utilization efficiency and fast electron transfer, the PdPtNi PNSs have remarkable activity of methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). The mass activities of the well-tuned PdPtNi PNSs for MOR and EOR were 6.21 A mg and 5.12 A mg, respectively, much higher than those of commercial Pt/C and Pd/C. In addition, after durability test, the PdPtNi PNSs exhibited desirable stability with the highest retained current density. Therefore, this work provides a significant guidance for designing and synthesizing a new 2D material with excellent catalytic performance toward direct fuel cells applications.
双金属二维（2D）纳米材料因其独特的物理化学性质而广泛应用于电催化领域，而具有大表面积的多孔结构的三金属二维材料鲜有报道。本文开发了一种一锅水热法合成三元超薄PdPtNi纳米片的方法。通过调节混合溶剂的体积比，制备了具有多孔纳米片（PNSs）和超薄纳米片（UNSs）的PdPtNi。通过一系列对照实验研究了PNSs的生长机理。值得注意的是，由于高原子利用效率和快速电子转移，PdPtNi PNSs具有显著的甲醇氧化反应（MOR）和乙醇氧化反应（EOR）活性。优化后的PdPtNi PNSs对MOR和EOR的质量活性分别为6.21 A mg和5.12 A mg，远高于商业Pt/C和Pd/C。此外，经过耐久性测试后，PdPtNi PNSs表现出理想的稳定性，具有最高的保留电流密度。因此，这项工作为设计和合成一种对直接燃料电池应用具有优异催化性能的新型二维材料提供了重要指导。
