Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-12

AUTHORS

Nastaran Ranjbar Sahraie, Ulrike I. Kramm, Julian Steinberg, Yuanjian Zhang, Arne Thomas, Tobias Reier, Jens-Peter Paraknowitsch, Peter Strasser

ABSTRACT

Carbon materials doped with transition metal and nitrogen are highly active, non-precious metal catalysts for the electrochemical conversion of molecular oxygen in fuel cells, metal air batteries, and electrolytic processes. However, accurate measurement of their intrinsic turn-over frequency and active-site density based on metal centres in bulk and surface has remained difficult to date, which has hampered a more rational catalyst design. Here we report a successful quantification of bulk and surface-based active-site density and associated turn-over frequency values of mono- and bimetallic Fe/N-doped carbons using a combination of chemisorption, desorption and (57)Fe Mössbauer spectroscopy techniques. Our general approach yields an experimental descriptor for the intrinsic activity and the active-site utilization, aiding in the catalyst development process and enabling a previously unachieved level of understanding of reactivity trends owing to a deconvolution of site density and intrinsic activity. More... »

PAGES

8618

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/ncomms9618

DOI

http://dx.doi.org/10.1038/ncomms9618

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1039721679

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/26486465


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Turtle is a human-readable linked data format.

curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1038/ncomms9618'

RDF/XML is a standard XML format for linked data.

curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1038/ncomms9618'


 

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