Nanoelectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
Biosensors (Basel). 2014 Nov 19;4(4):461-471. doi: 10.3390/bios4040461. eCollection 2014 Dec.
Bimetallic nanostructured core-shell structures are commonly used as catalysts in a wide variety of reactions. We surmised that the addition of an additional metal would potentially allow catalytic tailoring with the possibility of an increase in activity. Here a tri-metallic catalytic structure, consisting of clustered catalytic Pt on the surface of a Pd shell supported on a rod shaped Au core was fabricated. The significance of the additional metallic component is shown by comparative electrochemically active surface area (ECSA) analysis results for the trimetallic Aurod-Pdshell-Ptcluster, bimetallic Aurod-Ptcluster and monometallic JM-Pt (used as a reference), which have respective ECSA values (cm(2)/mgPt) of 1883.0, 1371.7 and 879. The potential utility of the trimetallic catalysts was shown in a hydrogen peroxide sensing protocol, which showed the catalyst to have a sensitivity of 604 ìA/mMcm(2) within a linear range of 0.0013-6.191 mM.
双金属纳米结构的核壳结构通常被用作各种反应的催化剂。我们推测，添加额外的金属可能会潜在地允许进行催化调整，并有可能提高其活性。在这里，我们制备了一种由聚集在棒状 Au 核上的 Pd 壳表面上的 Pt 簇组成的三金属催化结构。通过对三金属 Aurod-Pd 壳-Pt 簇、双金属 Aurod-Pt 簇和单金属 JM-Pt（用作参考）的电化学活性表面积（ECSA）分析结果进行比较，显示出额外金属成分的重要性，它们的 ECSA 值（cm²/mgPt）分别为 1883.0、1371.7 和 879。在过氧化氢传感方案中，展示了三金属催化剂的潜在实用性，该方案表明催化剂在 0.0013-6.191 mM 的线性范围内具有 604 μA/mMcm²的灵敏度。
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