Zhang Yangping, Gao Fei, Wang Caiqin, Shiraishi Yukihide, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science , Soochow University , 199 Renai Road , Suzhou 215123 , P.R. China.
College of Science , Nanjing Forestry University , 159 Longpan Road , Nanjing 210037 , P.R. China.
ACS Appl Mater Interfaces. 2019 Aug 28;11(34):30880-30886. doi: 10.1021/acsami.9b09110. Epub 2019 Aug 15.
Engineering robust electrocatalysts is always a key point in direct alcohol fuel cells. Catalysts with a one-dimension (1D) structure are well studied and considered as promising candidates among various catalysts in the past decades; however, the precise regulation on the surface structure of 1D nanomaterials is still a worthy subject. By creatively introducing a trimetallic nanoalloy, core@multishell structure, and 1D nanowire (NW) morphology, we have constructed a kind of novel spiny PtFePd@PtFe/Pt core@multishell 1D NW catalysts with PtFePd as the core and PtFe/Pt as the multishell on the basis of improving catalytic property. The composition-optimized PtFePd 1D NWs display remarkable catalytic properties for ethanol oxidation reaction and methanol oxidation reaction, in which mass activities are 4.965 and 4.038 A mg, 4.6 and 5.0 and 4.0 and 9.2-fold higher than Pt/C and Pd/C catalysts. Furthermore, the obtained PtFePd NWs can also retain favorable stability after durability tests. The unique core@multishell structure, spiny 1D NWs with many steps and kinks, and interior electronic and synergistic effect all contribute to the advanced catalytic performance. The present work has rationally designed the novel 1D PtFePd@PtFe/Pt core@multishell NW catalysts and offered a meaningful guideline for the designing of high-performance electrocatalysts.
设计坚固的电催化剂一直是直接醇类燃料电池的关键要点。一维（1D）结构的催化剂在过去几十年中得到了充分研究，并被认为是各种催化剂中有前景的候选者；然而，对一维纳米材料表面结构的精确调控仍然是一个值得研究的课题。通过创造性地引入三金属纳米合金、核壳多层结构和一维纳米线（NW）形态，我们在提高催化性能的基础上构建了一种新型的带刺的PtFePd@PtFe/Pt核壳多层一维NW催化剂，其以PtFePd为核，PtFe/Pt为多层壳。组成优化后的PtFePd一维NWs对乙醇氧化反应和甲醇氧化反应表现出显著的催化性能，其中质量活性分别为4.965和4.038 A mg，比Pt/C和Pd/C催化剂高4.6倍、5.0倍、4.0倍和9.2倍。此外，所获得的PtFePd NWs在耐久性测试后也能保持良好的稳定性。独特的核壳多层结构、具有许多台阶和扭结的带刺一维NWs以及内部电子和协同效应都有助于提高催化性能。本工作合理设计了新型的一维PtFePd@PtFe/Pt核壳多层NW催化剂，并为高性能电催化剂的设计提供了有意义的指导。
