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Enhanced catalytic activity of Au core Pd shell Pt cluster trimetallic nanorods for CO2 reduction

机译：Au核Pd壳Pt簇三金属纳米棒增强CO 2还原催化活性

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Herein, Au core Pd shell Pt cluster nanorods (Au@Pd@Pt NRs) with enhanced catalytic activity were rationally designed for carbon dioxide (CO _(2) ) reduction. The surface composition and Pd–Pt ratios significantly influenced the catalytic activity, and the optimized structure had only a half-monolayer equivalent of Pt ( θ _(Pt) = 0.5) with 2 monolayers of Pd, which could enhance the catalytic activity for CO _(2) reduction by 6 fold as compared to the Pt surface at ?1.5 V vs. SCE. A further increase in the loading of Pt actually reduced the catalytic activity; this inferred that a synergistic effect existed among the three different nanostructure components. Furthermore, these Au NRs could be employed to improve the photoelectrocatalytic activity by 30% at ?1.5 V due to the surface plasmon resonance. An in situ SERS investigation inferred that the Au@Pd@Pt NRs ( θ _(Pt) = 0.5) were less likely to be poisoned by CO because of the Pd–Pt bimetal edge sites; due to this reason, the proposed structure exhibited highest catalytic activity. These results play an important role in the mechanistic studies of CO _(2) reduction and offer a new way to design new materials for the conversion of CO _(2) to liquid fuels.
机译：在此，合理设计了具有增强催化活性的Au核Pd壳Pt簇纳米棒（Au @ Pd @ Pt NRs），用于二氧化碳（CO _（2））的还原。表面组成和Pd-Pt比率显着影响催化活性，优化结构只有Pt的半个单层当量（θ_（Pt）= 0.5）和2个Pd单层，这可以增强对CO的催化活性。相对于SCE，在？1.5 V时，Pt表面的_（2）降低了6倍。 Pt含量的进一步增加实际上降低了催化活性。这推断出三种不同的纳米结构组分之间存在协同效应。此外，由于表面等离振子共振，这些Au NRs可用于在±1.5 V的条件下将光电催化活性提高30％。 SERS的原位研究推断，由于Pd–Pt双金属边缘位点，Au @ Pd @ Pt NRs（θ_（Pt）= 0.5）不太可能被CO毒化。由于这个原因，所提出的结构表现出最高的催化活性。这些结果在减少CO _（2）的机理研究中起着重要作用，并为设计用于将CO _（2）转化为液体燃料的新材料提供了新途径。

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