Pramadewandaru Respati K, Lee Young Wook, Hong Jong Wook
Department of Chemistry, University of Ulsan Ulsan 44776 Republic of Korea
Department of Education Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 52828 Republic of Korea
RSC Adv. 2023 Sep 8;13(39):27046-27053. doi: 10.1039/d3ra04837c.
Metal nanocrystals (NCs) with controlled compositional and distributional structures have gained increasing attention due to their unique properties and broad applications, particularly in fuel cell systems. However, despite the significant importance of composition in metal NCs and their electrocatalytic behavior, comprehensive investigations into the relationship between atomic distribution and electrocatalytic activity remain scarce. In this study, we present the development of four types of nanocubes with similar sizes and controlled compositions (Pd-Pt alloy, Pd@Pt core-shell, Pd, and Pt) to investigate their influence on electrocatalytic performance for methanol oxidation reaction (MOR). The electrocatalytic activity and stability of these nanocubes exhibited variations based on their compositional structures, potentially affecting the interaction between the surface-active sites of the nanocrystals and reactive molecules. As a result, leveraging the synergistic effect of their alloy nanostructure, the Pd-Pt alloy nanocubes exhibited exceptional performance in MOR, surpassing the catalytic activity of other nanocubes, including Pd@Pt core-shell nanocubes, monometallic Pd and Pt nanocubes, as well as commercial Pd/C and Pt/C catalysts.
具有可控组成和分布结构的金属纳米晶体（NCs）因其独特的性质和广泛的应用而受到越来越多的关注，尤其是在燃料电池系统中。然而，尽管组成在金属纳米晶体及其电催化行为中具有重要意义，但对原子分布与电催化活性之间关系的全面研究仍然匮乏。在本研究中，我们制备了四种尺寸相似且组成可控的纳米立方体（钯 - 铂合金、钯@铂核壳结构、钯和铂），以研究它们对甲醇氧化反应（MOR）电催化性能的影响。这些纳米立方体的电催化活性和稳定性因其组成结构而有所不同，这可能会影响纳米晶体表面活性位点与反应分子之间的相互作用。结果，利用其合金纳米结构的协同效应，钯 - 铂合金纳米立方体在甲醇氧化反应中表现出卓越的性能，超过了其他纳米立方体的催化活性，包括钯@铂核壳纳米立方体、单金属钯和铂纳米立方体以及商业钯/碳和铂/碳催化剂。
