@article{mcclure_jiang_chu_fedkiw_2014, title={Oxygen electroreduction on Fe- or Co-containing carbon fibers}, volume={79}, ISSN={["1873-3891"]}, DOI={10.1016/j.carbon.2014.08.005}, abstractNote={Non-noble metal-containing electrocatalysts were prepared by an electrospinning method and evaluated as oxygen reduction electrocatalysts. Fe- or Co-containing carbon fibers were prepared by pyrolyzing electrospun polyacrylonitrile (PAN) fibers containing the respective metal precursor and are denoted Fe-PAN and Co-PAN, respectively. The Fe- or Co-PAN carbon fibers were acid-leached and subjected to a second pyrolysis, whereby the final fibers were found to be uniform in diameter with roughened surfaces. Scanning transmission electron microscopy equipped with energy dispersive spectroscopy area-mapping identified Fe or Co nanoparticulates throughout the fiber with a distribution of particulate sizes. X-ray diffractograms (XRD) revealed amorphous Fe-PAN and Co-PAN carbon fibers with no discernible Fe or Co phases, whereas high-resolution XPS scans show a range of potential Fe or Co species. Moreover, the high-resolution X-ray photoelectron spectroscopy (XPS) and peak-fitting analysis provided chemical species information for the C1s, N1s, Fe2p and Co2p regions. The physical characterizations highlighted potential beneficial components for the electrocatalysts that made their use as oxygen reduction reaction (ORR) effective. Rotating disk and ring-disk electrode experiments determined that the best Fe-PAN sample out-performed the best Co-PAN sample and even performed well in comparison to a commercial Pt/C electrocatalyst for the ORR in a high pH media.}, journal={CARBON}, author={McClure, Joshua P. and Jiang, Rongzhong and Chu, Deryn and Fedkiw, Peter S.}, year={2014}, month={Nov}, pages={457–469} }
 @article{mcclure_devine_jiang_chu_cuomo_parsons_fedkiw_2013, title={Oxygen Electroreduction on Ti- and Fe-Containing Carbon Fibers}, volume={160}, ISSN={["1945-7111"]}, url={http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000324810000079&KeyUID=WOS:000324810000079}, DOI={10.1149/2.029308jes}, abstractNote={A mixture of iron (II) phthalocyanine and polyacrylonitrile (PAN) was electrospun into fibers and pyrolyzed to form Fe-containing carbon fibers (Fe-PAN). Subsequent atomic layer deposition (ALD) coated the fibers with TiOy deposits (TiOy-Fe-PAN). Scanning transmission electron microscopy equipped with energy dispersive spectroscopy (STEM-EDS) detected C, Fe, and Ti across the diameter of the fiber, and X-ray photoelectron spectroscopy (XPS) revealed Fe(III) and CNx species present. After the ALD process, XPS revealed TiOy species on the Fe-PAN fibers, and heat-treating the TiOy-Fe-PAN samples created TiNxOy and TiNx species. Heat-treating Fe-PAN and TiOy-Fe-PAN samples resulted in a slight decrease in the Fe wt.% but affected an increase in the oxygen reduction reaction (ORR) activity in 0.5M H2SO4 at room temperature compared to the samples not heat treated. Moreover, the presence of Ti species decreased the production of H2O2 and increased the mass activity of the ORR on fibers subjected to cyclic potential excursions relative to samples without Ti species.}, number={8}, journal={JOURNAL OF THE ELECTROCHEMICAL SOCIETY}, author={McClure, Joshua P. and Devine, Christina K. and Jiang, Rongzhong and Chu, Deryn and Cuomo, Jerome J. and Parsons, Gregory N. and Fedkiw, Peter S.}, year={2013}, pages={F769–F778} }
 @article{jiang_tran_mcclure_chu_2012, title={Heat-treated hemin supported on graphene nanoplatelets for the oxygen reduction reaction}, volume={19}, journal={Electrochemistry Communications}, author={Jiang, R. Z. and Tran, D. T. and McClure, J. and Chu, D.}, year={2012}, pages={73–76} }
 @article{jiang_tran_mcclure_chu_2012, title={Increasing the electrochemically available active sites for heat-treated hemin catalysts supported on carbon black}, volume={75}, journal={Electrochimica Acta}, author={Jiang, R. Z. and Tran, D. T. and McClure, J. P. and Chu, D.}, year={2012}, pages={185–190} }
 @article{mcclure_thornton_jiang_chu_cuomo_fedkiw_2012, title={Oxygen Reduction on Metal-Free Nitrogen-Doped Carbon Nanowall Electrodes}, volume={159}, ISSN={["1945-7111"]}, DOI={10.1149/2.056211jes}, abstractNote={A plasma-enhanced chemical vapor deposition (PECVD) process using a CH4:H2 gas mixture creates vertically aligned carbon nanowalls (CNWs) on glassy carbon (GC) and Si substrates. Metal catalysts are not required for the nucleation and growth of CNWs on the substrates. The PECVD deposition temperatures and reaction times alter the morphology and thickness of the resulting CNW layer. A low-pressure, post-processing N2:Ar plasma treatment dopes the CNWs with nitrogen, and X-ray photoelectron spectroscopy measurements demonstrate that nitrogen is present at 4–20 atomic% with varying CNx bonding configurations dependent upon processing conditions. Raman spectroscopy shows relatively high intensity disorder bands (ID) compared to lower intensity graphitic bands (IG) indicating small crystalline domains. Rotating disk electrode voltammetry results show that the number of electrons (n) and kinetic current density (jk) of the oxygen reduction reaction both increase with nitrogen content. In addition, n and jk increase with thickness of the nitrogen-containing CNW deposit. The results indicate that nitrogen-doped CNWs have higher electrochemical reactivity than their non-doped counterparts.}, number={11}, journal={JOURNAL OF THE ELECTROCHEMICAL SOCIETY}, author={McClure, Joshua P. and Thornton, Jackson D. and Jiang, Rongzhong and Chu, Deryn and Cuomo, Jerome J. and Fedkiw, Peter S.}, year={2012}, pages={F733–F742} }
 @article{wang_mcclure_fedkiw_2012, title={Transport properties of proton- and hydroxide-exchange membranes for fuel cells}, volume={79}, ISSN={["0013-4686"]}, DOI={10.1016/j.electacta.2012.06.098}, abstractNote={The electro-osmotic drag coefficients (ξ) of water-vapor equilibrated Nafion® 117, a proton conductor, and Tokuyama® A201, a hydroxide conductor were determined from the steady-state voltage of a water concentration cell. The ξ values are reported, along with water uptake, ion-exchange capacity, ionic conductivity, and methanol permeability of these membranes. The room-temperature ξ of Nafion® 117 and Tokuyama® A201 is 0.99 (±0.07) and 0.61 (±0.12), respectively, and is relatively independent of water content over the relative humidity range of 14–96%. The time to steady potential in the water concentration cell was longer for the Tokuyama® A201 membrane than the Nafion® 117 membrane, which is tentatively attributed to the lower mobility of hydrated hydroxide (or carbonate from absorption of adventitious carbon dioxide) in comparison to hydronium ion.}, journal={ELECTROCHIMICA ACTA}, author={Wang, Xuhai and McClure, Joshua P. and Fedkiw, Peter S.}, year={2012}, month={Sep}, pages={126–132} }