Preparation and Instability of Nanocrystalline Cuprous Nitride Vela, Javier White, Miles Thompson, Michelle Miller, Gordon Miller, Gordon
dc.contributor.department Ames National Laboratory
dc.contributor.department Chemistry 2018-02-17T06:35:31.000 2020-06-30T01:16:15Z 2020-06-30T01:16:15Z Thu Jan 01 00:00:00 UTC 2015 2015-01-01
dc.description.abstract <p>Low-dimensional cuprous nitride (Cu<sub>3</sub>N) was synthesized by nitridation (ammonolysis) of cuprous oxide (Cu<sub>2</sub>O) nanocrystals using either ammonia (NH<sub>3</sub>) or urea (H<sub>2</sub>NCONH<sub>2</sub>) as the nitrogen source. The resulting nanocrystalline Cu<sub>3</sub>N spontaneously decomposes to nanocrystalline CuO in the presence of both water and oxygen from air at room temperature. Ammonia was produced in 60% chemical yield during Cu<sub>3</sub>N decomposition, as measured using the colorimetric indophenol method. Because Cu<sub>3</sub>N decomposition requires H<sub>2</sub>O and produces substoichiometric amounts of NH<sub>3</sub>>, we conclude that this reaction proceeds through a complex stoichiometry that involves the concomitant release of both N<sub>2</sub> and NH<sub>3</sub>. This is a thermodynamically unfavorable outcome, strongly indicating that H<sub>2</sub>O (and thus NH<sub>3</sub> production) facilitate the kinetics of the reaction by lowering the energy barrier for Cu3N decomposition. The three different Cu<sub>2</sub>O, Cu<sub>3</sub>N, and CuO nanocrystalline phases were characterized by a combination of optical absorption, powder X-ray diffraction, transmission electron microscopy, and electronic density of states obtained from electronic structure calculations on the bulk solids. The relative ease of interconversion between these interesting and inexpensive materials bears possible implications for catalytic and optoelectronic applications.</p>
dc.description.comments <p>Reprinted (adapted) with permission from <em>Inorganic Chemistry</em> 54 (2015): 6356, doi: <a href="" target="_blank">10.1021/acs.inorgchem.5b00679</a>. Copyright 2015 American Chemical Society.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1105
dc.identifier.contextkey 7874259
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/105
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 18:22:08 UTC 2022
dc.source.bitstream archive/|||Fri Jan 14 18:22:09 UTC 2022
dc.source.uri 10.1021/acs.inorgchem.5b00679
dc.subject.disciplines Chemistry
dc.subject.disciplines Inorganic Chemistry
dc.title Preparation and Instability of Nanocrystalline Cuprous Nitride
dc.type article
dc.type.genre article
dspace.entity.type Publication
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