Electrocatalytic properties of Au@Pt nanoparticles: effects of Pt shell packing density and Au core size.
Electrocatalytic properties of Au@Pt nanoparticles: effects of Pt shell packing density and Au core size.
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DOI：
10.1039/c1cp20761j
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
B. Du;O. Zaluzhna;Y. Tong
中科院分区：
文献类型：
--
作者：
B. Du;O. Zaluzhna;Y. Tong
本文详细研究了Au@Pt纳米粒子（NPs）在CO/甲醇氧化和氧还原反应中的电催化性能与Pt壳填充密度和Au核尺寸的关系。虽然大多数样品的催化活性不如商业铂黑的催化活性，后者在d波段中心上移（即更强的表面键合）方面表现得相当好，但最小的金核样品所表现出的最急剧的活性恢复趋势表明，随着金核变小，可能会向d波段中心下移（即更弱的表面键合）过渡。
A detailed study of electrocatalytic properties of Au@Pt nanoparticles (NPs) as functions of Pt shell packing density and Au core size in terms of CO/methanol oxidation and oxygen reduction reactions is reported here. While most samples studied showed inferior catalytic activities to those of the commercial Pt black that fall reasonably well in a d-band-center up-shift (i.e., stronger surface bonding) regime, the steepest activity recovery trend as manifested by the smallest Au-core samples suggests a plausible transition to a d-band-center down-shift (i.e., weaker surface bonding) regime as the Au core becomes smaller.