Title

Bulk single crystal growth and sample surface preparation of catalytic NaAu 2

Publication Date

2-21-2019

Department

Ames Laboratory; Chemistry; Materials Science and Engineering

Campus Units

Chemistry, Materials Science and Engineering, Ames Laboratory

OSTI ID+

1498713

Report Number

IS-J 9657

DOI

10.1016/j.jallcom.2019.02.204

Journal Title

Journal of Alloys and Compounds

Volume Number

789

First Page

362

Last Page

366

Abstract

Here in we have grown bulk single crystals of NaAu2 for the first time to enable surface studies on the nature of the (111) bulk surface. This intermetallic compound exhibits surprisingly high catalytic activity for CO oxidation, a benchmark reaction. Theory predicts NaAu2 to be the most thermodynamically stable composition in the Na-Au binary phase diagram and NaAu2 has been seen to preferentially form in experiments containing Na and Au which supports this prediction. The (111) surface was also predicted to be the most stable and is nearly bulk-terminated making single crystal samples prepared with this crystallographic orientation a fitting choice. The crystal quality and surface composition of the metallographically prepared surface was determined by x-ray diffraction methods in addition to optical and electron microscopy.

DOE Contract Number(s)

AC02-07CH11358; 200021-129511

Language

en

Department of Energy Subject Categories

36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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