Evidence map›Paper›PMID 23667149›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2013

Energetic basis of catalytic activity of layered nanophase calcium manganese oxides for water oxidation.

Nancy Birkner, Sara Nayeri, Babak Pashaei, Mohammad Mahdi Najafpour, William H Casey, Alexandra Navrotsky

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
6.5field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 104 citations in OpenAlex.

  1. Article
  2. Average and Local Structure of LaChemistry of materials : a publication of the American Chemical Society · 2025
    Article
  3. Article
  4. Article
  5. Review
  6. Redox properties of birnessite from a defect perspective.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  7. Thermodynamics of manganese oxides: Sodium, potassium, and calcium birnessite and cryptomelane.Proceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  8. Article
  9. Article
  10. Article
  11. Rate and mechanism of the photoreduction of birnessite (MnO2) nanosheets.Proceedings of the National Academy of Sciences of the United States of America · 2015
    Article
  12. Rapidly reversible redox transformation in nanophase manganese oxides at room temperature triggered by changes in hydration.Proceedings of the National Academy of Sciences of the United States of America · 2014
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Nancy BirknerPeter A. Rock Thermochemistry Laboratory and Nanomaterials in the Environment, Agriculture, and Technology Organized Research Unit, University of California, Davis, CA 95616, USA.
Sara Nayeri
Babak Pashaei
Mohammad Mahdi Najafpour
William H Casey
Alexandra Navrotsky
Nanomaterials Research (United States) · USInstitute for Advanced Studies in Basic Sciences · IRUniversity of California, Davis · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Previous measurements show that calcium manganese oxide nanoparticles are better water oxidation catalysts than binary manganese oxides (Mn3O4, Mn2O3, and MnO2). The probable reasons for such enhancement involve a combination of factors: The calcium manganese oxide materials have a layered structure with considerable thermodynamic stability and a high surface area, their low surface energy suggests relatively loose binding of H2O on the internal and external surfaces, and they possess mixed-valent manganese with internal oxidation enthalpy independent of the Mn(3+)/Mn(4+) ratio and much smaller in magnitude than the Mn2O3-MnO2 couple. These factors enhance catalytic ability by providing easy access for solutes and water to active sites and facile electron transfer between manganese in different oxidation states.

Indexed as

Calcium CompoundsCalorimetry, Differential ScanningCatalysisManganese CompoundsMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionNanoparticlesOxidation-ReductionOxidesThermodynamicsThermogravimetryWaterX-Ray DiffractionCalcium CompoundsManganese Compoundsmanganese oxideOxidesWaternanomaterialsthermochemistry

Identifiers

PMID23667149
PMCPMC3670370
OpenAlexW2020570559

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.