Pu Houkang, Zhang Te, Dong Kaiyu, Dai Huizhen, Zhou Luming, Wang Kuankuan, Bai Shuxing, Wang Yingying, Deng Yujia
School of Chemistry and Chemical Engineering, Qingdao University, Ningxia Road 308, Qingdao 266071, China.
Qingdao Hengxing University of Science and Technology, Jiushui East Road 588, Qingdao 266100, China.
Nanoscale. 2021 Dec 16;13(48):20592-20600. doi: 10.1039/d1nr07180g.
In the field of catalysis, the design and construction of nanomaterials is an efficient way to optimize the catalytic activity of catalysts. This study presents the synthesis of PtCu tripod nanocrystals with branching structures and high purity prepared using a simple hydrothermal method. The dendritic PtCu triangular nanocrystals were successfully synthesized by regulating the amount of I ions to achieve different degrees of branching on PtCu nanocrystals, and the process was systematically studied and analyzed. Meanwhile, dumbbell nanocrystals of PtCu were successfully synthesized through slight adjustments to synthesis conditions. In electrochemical tests, the obtained dendritic PtCu triangular nanocrystals exhibited prominent electrocatalytic activity and long-term stability for ethylene glycol, methanol, and ethanol oxidation reactions due to the unique nanostructures as well as alloyed virtue, and were much better than commercial Pt/C. In addition, this study provides a general strategy for designing novel branched Pt-based nanomaterials with high electrocatalytic performance.
在催化领域，纳米材料的设计与构建是优化催化剂催化活性的有效途径。本研究介绍了采用简单水热法制备的具有分支结构和高纯度的PtCu三脚架纳米晶体的合成。通过调节I离子的量以实现PtCu纳米晶体上不同程度的分支，成功合成了树枝状PtCu三角形纳米晶体，并对该过程进行了系统的研究和分析。同时，通过对合成条件的轻微调整，成功合成了PtCu哑铃状纳米晶体。在电化学测试中，由于独特的纳米结构以及合金特性，所获得的树枝状PtCu三角形纳米晶体对乙二醇、甲醇和乙醇氧化反应表现出突出的电催化活性和长期稳定性，且远优于商业Pt/C。此外，本研究为设计具有高电催化性能的新型分支Pt基纳米材料提供了一种通用策略。
