Liao Xuejiang, Lao Xianzhuo, Li Ze, Yang Likang, Ye Wanneng, Guo Peizhi
Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China.
College of Physics, State Key Laboratory of Bio-Fibers and Eco-Textiles, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, China.
Langmuir. 2024 Apr 30;40(17):9310-9317. doi: 10.1021/acs.langmuir.4c01028. Epub 2024 Apr 18.
In recent years, preparing precious metal catalysts with a controllable morphology has become a hot research topic for researchers. In this study, monodispersed palladium (Pd) nanoparticles (NP) and ultrathin Pd twisty nanowire networks (TNN) were synthesized in a solvothermal system using ,-dimethylformamide (DMF) and oleylamine (OAm) as solvents, Transmission electron microscopy (TEM) images reveal the successful synthesis of nanoparticles and ultrathin TNN microstructures. Electrochemical data show that the current densities of Pd-NP and Pd-TNN for the ethanol oxidation reaction (EOR) reach 1878 mA mg and 1765 mA mg, respectively. Compared to commercial Pd/C, Pd-TNN and Pd-NP exhibit better catalytic stability, lower electron transfer barriers, and more resistance to catalyst poisoning. Temperature, pH value, and ethanol concentration are all favorable for the EOR. According to the experimental data, the mechanism of enhanced electrocatalytic activity of Pd-NP and Pd-TNN catalysts for ethanol oxidation is discussed. This paper presents a method for preparing catalysts with stabilized structures to develop Pd-based catalysts for electrocatalytic oxidation reactions.
近年来，制备具有可控形貌的贵金属催化剂已成为研究人员的一个热门研究课题。在本研究中，以N，N-二甲基甲酰胺（DMF）和油胺（OAm）作为溶剂，在溶剂热体系中合成了单分散钯（Pd）纳米颗粒（NP）和超薄钯扭曲纳米线网络（TNN）。透射电子显微镜（TEM）图像显示成功合成了纳米颗粒和超薄TNN微观结构。电化学数据表明，用于乙醇氧化反应（EOR）的Pd-NP和Pd-TNN的电流密度分别达到1878 mA mg和1765 mA mg。与商业Pd/C相比，Pd-TNN和Pd-NP表现出更好的催化稳定性、更低的电子转移势垒以及更强的抗催化剂中毒能力。温度、pH值和乙醇浓度均有利于乙醇氧化反应。根据实验数据，讨论了Pd-NP和Pd-TNN催化剂对乙醇氧化增强电催化活性的机理。本文提出了一种制备结构稳定的催化剂的方法，以开发用于电催化氧化反应的钯基催化剂。
