Yttria stabilized and surface activated platinum (PtxYOy) nanoparticles through rapid microwave assisted synthesis for oxygen reduction reaction
Sandstrom, R (Sandstrom, Robin); Gracia-Espino, E (Gracia-Espino, Eduardo); Hu, GZ (Hu, Guangzhi); Shchukarev, A (Shchukarev, Andrey); Ma, JY (Ma, Jingyuan); Wagberg, T (Wagberg, Thomas)
2018
发表期刊NANO ENERGY
卷号46期号:4页码:141-149
摘要

The enhancement of platinum (Pt) based catalysts for the oxygen reduction reaction (ORR) by addition of rare earth metals represents a promising strategy to achieve high activity yet low content of the precious metal and concurrently addresses stability issues experienced by traditional late transition metal doping. Improvement in Pt utilization is essential for vehicular applications where material cost and abundancy is a great concern. Here we report a fast and efficient production route of yttria-stabilized platinum nanoparticles (PtxYOy) using a conventional household microwave oven. ORR performance showed a significant improvement and an optimum activity at a 3:1 Pt:Y ratio outperforming that of commercial Pt-Vulcan with a doubled specific activity. Incorporation of Y is evidenced by extended X-ray absorption fine structure and energy dispersive X-ray analysis, while significant amounts of integrated Y2O3 species are detected by X-ray photoelectron spectroscopy. Density functional theory calculations suggest surface migration and oxidation of Y, forming stable superficial yttrium oxide species with low negative enthalpies of formation. The robustness of PtxYOy is shown experimentally and through theoretical arguments demonstrating that surface yttria acts as an stabilizing agent and promoter of highly active ORR sites on the remaining Pt surface, surpassing even the Pt3Y alloy configuration.

关键词Yttrium Platinum Nanoparticles Catalysis Hydrogen Fuel Cells Oxygen Reduction
DOI10.1016/j.nanoen.2018.01.038
收录类别SCI
WOS记录号WOS:000427924000017
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/5256
专题省部共建新疆特有药用资源利用重点实验室
作者单位1.Umea Univ, Dept Phys, S-90187 Umea, Sweden
2.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, State Key Lab Basis Xinjiang Indigenous Med Plant, Key Lab Chem Plant Resources Arid Reg, Urumqi 830011, Peoples R ChinaUmea Univ, Dept Chem, S-90187 Umea, Sweden
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
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Sandstrom, R ,Gracia-Espino, E ,Hu, GZ ,et al. Yttria stabilized and surface activated platinum (PtxYOy) nanoparticles through rapid microwave assisted synthesis for oxygen reduction reaction[J]. NANO ENERGY,2018,46(4):141-149.
APA Sandstrom, R ,Gracia-Espino, E ,Hu, GZ ,Shchukarev, A ,Ma, JY ,&Wagberg, T .(2018).Yttria stabilized and surface activated platinum (PtxYOy) nanoparticles through rapid microwave assisted synthesis for oxygen reduction reaction.NANO ENERGY,46(4),141-149.
MLA Sandstrom, R ,et al."Yttria stabilized and surface activated platinum (PtxYOy) nanoparticles through rapid microwave assisted synthesis for oxygen reduction reaction".NANO ENERGY 46.4(2018):141-149.
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