DOI: 10.1126/science.1195875. Nanophase Transition Metal Oxides Show Large Thermodynamically Driven Shifts in Oxidation-Reduction Equilibria

Nanophase Transition Metal Oxides Show Large Thermodynamically Driven Shifts in Oxidation-Reduction Equilibria

10.1126/science.1195875

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Feeling the Pinch Nanoparticles exhibit many different properties compared to their larger counterparts, but how the stability of certain phases relative to others is affected by a change in particle size is often unclear. Using a thermodynamic probe sensitive to nanoparticle surfaces, Navrotsky et al. (p. 199 ) show that surface energy strongly influences the stability of some metal oxides relative to others. For example, nanoparticles of CoO, which are stable at larger sizes, are only stable over a very narrow range of conditions due their high surface energies. Cobalt oxides are catalysts that may one day promote the cost-effective generation of hydrogen from water, but nanoparticles in soils and biological systems—including iron and manganese oxides—also feel the pinch of surface energy on their range of stability.

Bibliography

Navrotsky, A., Ma, C., Lilova, K., & Birkner, N. (2010). Nanophase Transition Metal Oxides Show Large Thermodynamically Driven Shifts in Oxidation-Reduction Equilibria. Science, 330(6001), 199â201.

Authors 4

Alexandra Navrotsky (first)
Chengcheng Ma (additional)
Kristina Lilova (additional)
Nancy Birkner (additional)

References 26 Referenced 296

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Dates

Type	When
Created	14 years, 10 months ago (Oct. 7, 2010, 2:17 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 10:41 a.m.)
Indexed	1 day, 7 hours ago (Aug. 28, 2025, 8:47 a.m.)
Issued	14 years, 10 months ago (Oct. 8, 2010)
Published	14 years, 10 months ago (Oct. 8, 2010)
Published Print	14 years, 10 months ago (Oct. 8, 2010)

Funders 0

None

BibTeX

@article{Navrotsky_2010, title={Nanophase Transition Metal Oxides Show Large Thermodynamically Driven Shifts in Oxidation-Reduction Equilibria}, volume={330}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1195875}, DOI={10.1126/science.1195875}, number={6001}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Navrotsky, Alexandra and Ma, Chengcheng and Lilova, Kristina and Birkner, Nancy}, year={2010}, month=oct, pages={199–201} }

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