He Lan-Qi, Yang Hao, Huang Jia-Jun, Lu Xi-Hong, Li Gao-Ren, Liu Xiao-Qing, Fang Ping-Ping, Tong Ye-Xiang
KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
RSC Adv. 2019 Apr 1;9(18):10168-10173. doi: 10.1039/c8ra10494h. eCollection 2019 Mar 28.
Herein, Au core Pd shell Pt cluster nanorods (Au@Pd@Pt NRs) with enhanced catalytic activity were rationally designed for carbon dioxide (CO) 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 ( = 0.5) with 2 monolayers of Pd, which could enhance the catalytic activity for CO reduction by 6 fold as compared to the Pt surface at -1.5 V 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 SERS investigation inferred that the Au@Pd@Pt NRs ( = 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 reduction and offer a new way to design new materials for the conversion of CO to liquid fuels.
在此，合理设计了具有增强催化活性的金核钯壳铂簇纳米棒（Au@Pd@Pt NRs）用于二氧化碳（CO）还原。表面组成和钯 - 铂比例显著影响催化活性，优化后的结构具有仅相当于0.5单层的铂，同时有2单层的钯，与在 -1.5 V（饱和甘汞电极）时的铂表面相比，其可将CO还原的催化活性提高6倍。铂负载量的进一步增加实际上降低了催化活性；这表明三种不同纳米结构组分之间存在协同效应。此外，由于表面等离子体共振，这些金纳米棒在 -1.5 V时可将光电催化活性提高30%。表面增强拉曼光谱（SERS）研究表明，由于钯 - 铂双金属边缘位点，Au@Pd@Pt NRs（ = 0.
