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• W3044987308 endingPage "114492" @default.
• W3044987308 startingPage "114492" @default.
• W3044987308 abstract "Single-nanometer-scale PtSi fine particles (PtSi NPs) were synthesized via the arc-plasma deposition of Si on a highly oriented pyrolytic graphite at a fixed substrate temperature of 600 °C, followed by electron-beam deposition of Pt at the temperatures between 100 and 600 °C in ultra-high vacuum. X-ray diffraction patterns of the vacuum-synthesized PtSi NPs showed that a solid solution of PtSi was the major component of the particles. Minor diffraction peaks, due to the intermetallic compounds (Pt3Si1 and Pt12Si5), at the Pt-deposition temperature (Tsub-Pt) of 500 °C, were also observed. Scanning tunneling microscopic images exhibited that PtSi NPs with an average diameter less than 10 nm were dispersed in the substrate at Tsub-Pt temperatures up to 500 °C. The PtSi NPs synthesized at a Tsub-Pt of 300 and 450 °C showed 1.7 times higher initial mass activity for oxygen reduction reaction (ORR) compared to commercial carbon-supported Pt NPs catalysts and showed better electrochemical stability than pure Pt NPs. These results demonstrate that the arc-plasma deposition of Si NPs, followed by e-beam deposition of metal elements (Pt) in ultra-high vacuum is a new class dry-synthesis for the single-nanometer-scale fine particles of PtSi for electrocatalysis, e.g. ORR." @default.
• W3044987308 created "2020-07-29" @default.
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• W3044987308 date "2020-11-01" @default.
• W3044987308 modified "2023-09-25" @default.
• W3044987308 title "Dry synthesis of single-nanometer-scale Pt Si fine particles for electrocatalysis" @default.
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• W3044987308 doi "https://doi.org/10.1016/j.jelechem.2020.114492" @default.
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