Xu Yuhua, Li Jie, Hu Mengyun, Wu Zhengying, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
The School of Science, Xi'an Jiaotong-Liverpool University, Suzhou 215028, China.
Nanoscale. 2024 Jul 25;16(29):14096-14100. doi: 10.1039/d4nr01537a.
The development of efficient alcohol electrooxidation catalysts is of vital importance for the commercialization of direct liquid fuel cells. As emerging advanced catalysts, two-dimensional (2D) noble metal nanomaterials have attracted much research attention due to their intrinsic structural advantages. Herein, we report the synthesis of petal-like PdAg nanosheets (NSs) with an ultrathin 2D structure and jagged edges a facile wet-chemical approach, combining doping engineering and morphology tuning. Notably, the highly active sites and Pd-Ag composition endowed PdAg NSs with improved toxicity tolerance and substantially improved the durability toward the ethanol/methanol oxidation reaction (EOR/MOR). Moreover, the electronic effect and synergistic effect significantly enhanced the EOR and MOR activities in comparison with Pd NSs and commercial Pd/C. This work provides efficient catalysts for fuel electrooxidations and deep insight into the rational design and fabrication of novel 2D nanoarchitecture.
高效醇类电氧化催化剂的开发对于直接液体燃料电池的商业化至关重要。作为新兴的先进催化剂，二维（2D）贵金属纳米材料因其固有的结构优势而备受研究关注。在此，我们报道了通过一种简便的湿化学方法，结合掺杂工程和形貌调控，合成具有超薄二维结构和锯齿状边缘的花瓣状钯银纳米片（NSs）。值得注意的是，高活性位点和钯银组成赋予了钯银纳米片更好的抗毒性能力，并显著提高了其对乙醇/甲醇氧化反应（EOR/MOR）的耐久性。此外，与钯纳米片和商业钯碳相比，电子效应和协同效应显著增强了EOR和MOR活性。这项工作为燃料电氧化提供了高效催化剂，并为新型二维纳米结构的合理设计和制备提供了深入见解。
