Zhang Nannan, Li Jie, Liang Wanyu, Zhang Yangping, Wu Zhengying, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Inorg Chem. 2024 Apr 15;63(15):7063-7070. doi: 10.1021/acs.inorgchem.4c00820. Epub 2024 Apr 3.
2D nanodendrites (NDs) and nanosheets (NSs) have been regarded as efficient nanocatalysts for enhancing the electrocatalytic performance due to their low coordinated sites and abundant electrocatalytic centers. Nevertheless, it remains challenging to construct advanced NDs and NSs in a single reaction system. Herein, by tuning the volume ratios of mixed solvents, the reduction and diffusion rate of Sn on Pd NSs template was rationally controlled to prepare PdSn NDs and PdSn NSs. Ascribed to the open 2D nanostructure, high specific surface area, and robust synergistic effect, the as-prepared PdSn NDs and PdSn NSs exhibited distinguished electrocatalytic activities for ethylene glycol oxidation reaction (EGOR) and ethanol oxidation reaction (EOR), as well as commendable electrocatalytic durability, which were far superior to the Pd NSs and commercial Pd/C. In addition, the PdSn NDs exhibited enhanced reaction kinetics because the characteristic branch structure exposed a high density of active sites. This work may provide significant guidance for preparing excellent nanocatalysts with various morphological features by simply optimizing the content of the coexisting solvents.
二维纳米枝晶（NDs）和纳米片（NSs）因其低配位位点和丰富的电催化中心而被视为增强电催化性能的高效纳米催化剂。然而，在单一反应体系中构建先进的NDs和NSs仍然具有挑战性。在此，通过调节混合溶剂的体积比，合理控制了Sn在Pd NSs模板上的还原和扩散速率，从而制备出PdSn NDs和PdSn NSs。由于具有开放的二维纳米结构、高比表面积和强大的协同效应，所制备的PdSn NDs和PdSn NSs对乙二醇氧化反应（EGOR）和乙醇氧化反应（EOR）表现出卓越的电催化活性，以及值得称赞的电催化耐久性，远远优于Pd NSs和商业Pd/C。此外，PdSn NDs表现出增强的反应动力学，因为其特征分支结构暴露了高密度的活性位点。这项工作可能通过简单地优化共存溶剂的含量，为制备具有各种形态特征的优异纳米催化剂提供重要指导。
