DOI: 10.1017/s1431927602010097. Transmission Electron Microscopy Studies of the Nanoscale Structure and Chemistry of Pt<sub>50</sub>Ru<sub>50</sub> Electrocatalysts

Transmission Electron Microscopy Studies of the Nanoscale Structure and Chemistry of Pt50Ru50 Electrocatalysts

10.1017/s1431927602010097

Crossref journal-article

Oxford University Press (OUP)

Microscopy and Microanalysis (286)

Abstract

The structural and chemical heterogeneity of 2.5-nm Pt50Ru50 electrocatalysts was studied by transmission electron microscopy using selected area diffraction, lattice imaging, electron-energy loss spectroscopy, and energy-dispersive X-ray spectroscopy. The catalysts with the highest methanol oxidation activities exhibit oxidation-induced phase separation on the nanoscale to form Pt-rich metal embedded in Ru-rich hydrous and anhydrous oxide. Reduction of the oxide-on-metal samples produces a true bimetallic face-centered cubic Pt50Ru50 alloy, with 275 times lower oxidation activity.

Authors 4

Rhonda M. Stroud (first)
Jeffrey W. Long (additional)
Karen E. Swider-Lyons (additional)
Debra R. Rolison (additional)

References 0 Referenced 23

None

Dates

Type	When
Created	22 years, 9 months ago (Nov. 13, 2002, 6:27 p.m.)
Deposited	2 years, 6 months ago (Feb. 14, 2023, 4:02 p.m.)
Indexed	1 year, 7 months ago (Jan. 9, 2024, 10:18 p.m.)
Issued	23 years, 6 months ago (Feb. 1, 2002)
Published	23 years, 6 months ago (Feb. 1, 2002)
Published Online	23 years, 4 months ago (March 28, 2002)
Published Print	23 years, 6 months ago (Feb. 1, 2002)

Funders 0

None

BibTeX

@article{Stroud_2002, title={Transmission Electron Microscopy Studies of the Nanoscale Structure and Chemistry of Pt50Ru50 Electrocatalysts}, volume={8}, ISSN={1435-8115}, url={http://dx.doi.org/10.1017/s1431927602010097}, DOI={10.1017/s1431927602010097}, number={1}, journal={Microscopy and Microanalysis}, publisher={Oxford University Press (OUP)}, author={Stroud, Rhonda M. and Long, Jeffrey W. and Swider-Lyons, Karen E. and Rolison, Debra R.}, year={2002}, month=feb, pages={50–57} }

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  "abstract": "<jats:p>The structural and chemical heterogeneity of 2.5-nm \nPt<jats:sub>50</jats:sub>Ru<jats:sub>50</jats:sub> electrocatalysts was studied \nby transmission electron microscopy using selected area \ndiffraction, lattice imaging, electron-energy loss spectroscopy, \nand energy-dispersive X-ray spectroscopy. The catalysts with \nthe highest methanol oxidation activities exhibit oxidation-induced \nphase separation on the nanoscale to form Pt-rich metal embedded \nin Ru-rich hydrous and anhydrous oxide. Reduction of the \noxide-on-metal samples produces a true bimetallic face-centered \ncubic Pt<jats:sub>50</jats:sub>Ru<jats:sub>50</jats:sub> alloy, with 275 times lower \noxidation activity.</jats:p>",
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