Journal
NANOMATERIALS
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/nano11020290
Keywords
mechanochemical synthesis; carbon N-doped; Co2O3 nanoparticles; PAN; OER
Categories
Funding
- CONACYT-Mexico [709621]
- PRODEP (SEP-UAS)
- Andalusian Government of Spain [UCO-1263193]
- FEDER funds
- Ministry of Science, Innovation and Universities of Spain (MINECO) [RyC-2014-14956, CTQ2017-83961-R, CTQ2017-92264-EXP]
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A new class of PAN-based Co-N-doped carbon materials was reported as efficient catalysts for OER. The study found that Co doping concentration and treatment conditions affected the catalytic performance, with Co-N-doped carbon materials exhibiting good OER catalytic performance in alkaline environments.
We report a new class of polyacrylonitrile (PAN)-based Co-N-doped carbon materials that can act as suitable catalyst for oxygen evolution reactions (OER). Different Co loadings were mechanochemically added into post-consumed PAN fibers. Subsequently, the samples were treated at 300 degrees C under air (PAN-A) or nitrogen (PAN-N) atmosphere to promote simultaneously the Co3O4 species and PAN cyclization. The resulting electrocatalysts were fully characterized and analyzed by X-ray diffraction (XRD) and photoelectron spectroscopy (XPS), transmission (TEM) and scanning electron (SEM) microscopies, as well as nitrogen porosimetry. The catalytic performance of the Co-N-doped carbon nanomaterials were tested for OER in alkaline environments. Cobalt-doped PAN-A samples showed worse OER electrocatalytic performance than their homologous PAN-N ones. The PAN-N/3% Co catalyst exhibited the lowest OER overpotential (460 mV) among all the Co-N-doped carbon nanocomposites, reaching 10 mA/cm(2). This work provides in-depth insights on the electrocatalytic performance of metal-doped carbon nanomaterials for OER.
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