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Title: Thermal chemistry of hydrazine on clean and oxygen- and water-predosed Cu(110) single-crystal surfaces

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1373612
Grant/Contract Number:
SC0001839
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Surface Science
Additional Journal Information:
Journal Volume: 650; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-08-02 05:09:42; Journal ID: ISSN 0039-6028
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Yao, Yunxi, and Zaera, Francisco. Thermal chemistry of hydrazine on clean and oxygen- and water-predosed Cu(110) single-crystal surfaces. Netherlands: N. p., 2016. Web. doi:10.1016/j.susc.2015.08.034.
Yao, Yunxi, & Zaera, Francisco. Thermal chemistry of hydrazine on clean and oxygen- and water-predosed Cu(110) single-crystal surfaces. Netherlands. doi:10.1016/j.susc.2015.08.034.
Yao, Yunxi, and Zaera, Francisco. 2016. "Thermal chemistry of hydrazine on clean and oxygen- and water-predosed Cu(110) single-crystal surfaces". Netherlands. doi:10.1016/j.susc.2015.08.034.
@article{osti_1373612,
title = {Thermal chemistry of hydrazine on clean and oxygen- and water-predosed Cu(110) single-crystal surfaces},
author = {Yao, Yunxi and Zaera, Francisco},
abstractNote = {},
doi = {10.1016/j.susc.2015.08.034},
journal = {Surface Science},
number = C,
volume = 650,
place = {Netherlands},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.susc.2015.08.034

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  • The surface chemistry of copper(I)-N,N'-di-sec-butylacetamidinate on Cu(110) single-crystal surfaces has been characterized under ultrahigh vacuum by temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy. A series of thermal stepwise conversions were identified, starting with the partial dissociative adsorption of the copper acetamidinate dimers into a mixture of monomers and dimers on the surface. An early dissociation of a C-N bond leads to the production of N-sec-butylacetamidine, which is detected in TPD experiments in three temperature regimes, the last one centered around 480 K. Butene, and a small amount of butane, is also detected above approximately 500 K, and hydrogen production,more » an indication of dehydrogenation of surface fragments, is observed at 460, 550 and 670 K. In total, only about 10% of the initial copper(I)-N,N'-di-sec-butylacetamidinate adsorbed monolayer decomposes, and only about {approx}3% of carbon is left behind on the surface after heating to high temperatures. The implications of this surface chemistry to the design of chemical film growth processes using copper acetamidinates as precursors are discussed.« less
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  • A model based on a classical dynamical calculation of the impact of a 600-eV Ar/sup +/ ion into a single crystal has been developed to the point where it compares quantitatively to a wide variety of experimental observables. Here, we make direct comparisons between experiment and theory for relative sputtering yields, energy and angular distributions of the ejected atoms, and multimer yields. The model is also extended from clean single-crystal surfaces to include adsorbate atoms and molecules. These results are compared to experimental SIMS studies aimed at sorting out the structure-sensitive factors that contribute to the cluster ion yield. Inmore » oxygen chemisorption on Ni(100), for example, the O/sub 2//sup -//O/sup -/ yield is four times larger for a c (2 x 2) coverage than for a p (2 x 2) coverage, a value also predicted by the calculations. In molecular CO chemisorption, the ejection of CO is found to occur molecularly in both the experiments and in the calculations. In comparison to the calculations, a high value of Ni/sub 2/CO/sup +//NiCO/sup +/ is consistent with a bridge-bonded CO structure at low coverage.« less
  • The first results of a study of the oxygen reduction reaction on a rotating ring-disk electrode using single-crystal Pt disk electrodes are presented. The order of activity of Pt(hkl) in H{sub 2}SO{sub 4} increased in the sequence (111) < (100) < (110). These differences are attributed to the structure sensitivity of (bi)sulfate anion adsorption and its inhibiting effect. Very small fluxes (I{sub R}/N < 0.01I{sub D}) of peoxide were detected at the ring at potentials above 0 V (SCE) on all surfaces. However, below 0 V absorbed hydrogen affected the partial reduction of oxygen to H{sub 2}O{sub 2} in themore » order (111) < (100) > (110), with 100% H{sub 2}O{sub 2} formation on Pt(111). 30 refs., 4 figs.« less