Search Results - "Ozkan, Umit"

Cobalt-Based Catalysts for Ethanol Steam Reforming: An Overview by Sohn, Hyuntae, Ozkan, Umit S

“…Cobalt has been extensively studied for its use as an alternative catalyst to noble metals for ethanol steam reforming. Among the many other catalyst supports…”
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Insights into oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) active sites for nitrogen-doped carbon nanostructures (CNx) in acidic media by Mamtani, Kuldeep, Jain, Deeksha, Dogu, Doruk, Gustin, Vance, Gunduz, Seval, Co, Anne C., Ozkan, Umit S.

“…[Display omitted] •CNx was shown as a potential catalyst for a regenerative fuel cell system.•The ORR activity of CNx was found to be much higher than…”
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Production of syngas with controllable H2/CO ratio by high temperature co-electrolysis of CO2 and H2O over Ni and Co- doped lanthanum strontium ferrite perovskite cathodes by Deka, Dhruba J., Gunduz, Seval, Fitzgerald, Taylor, Miller, Jeffrey T., Co, Anne C., Ozkan, Umit S.

“…[Display omitted] •Ni and Co- doped La0.7Sr0.2FeO3 catalysts used as cathode for CO2 and H2O co-electrolysis.•Ni doping enhances co-electrolysis activity,…”
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Heteroatom-Doped Carbon Nanostructures as Oxygen Reduction Reaction Catalysts in Acidic Media: An Overview by Mamtani, Kuldeep, Ozkan, Umit S.

“…This paper provides an overview of the studies that were conducted in our laboratories in the last decade on hetero-atom doped carbon structures as potential…”
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Role of Graphitic Edge Plane Exposure in Carbon Nanostructures for Oxygen Reduction Reaction by Biddinger, Elizabeth J, Ozkan, Umit S

“…The role that nanostructure plays in carbon-based oxygen reduction reaction (ORR) catalysts is unclear. In this publication, the role that graphitic edge plane…”
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Effect of Support Particle Size in Steam Reforming of Ethanol over Co/CeO2 Catalysts by Soykal, I. Ilgaz, Sohn, Hyuntae, Ozkan, Umit S

“…Co catalysts supported on ceria supports with two different particle sizes, one in the micro- and the other in the nano-range, were investigated for their…”
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Investigation of hetero-phases grown via in-situ exsolution on a Ni-doped (La,Sr)FeO3 cathode and the resultant activity enhancement in CO2 reduction by Deka, Dhruba J., Kim, Jaesung, Gunduz, Seval, Aouine, Mimoun, Millet, Jean-Marc M., Co, Anne C., Ozkan, Umit S.

“…[Display omitted] •Reducing environment above 400 °C caused exsolution of B-site metal (Fe, Ni) ions.•Ruddlesden-Popper phase formed along the evolution of…”
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Changing the Oxygen Mobility in Co/Ceria Catalysts by Ca Incorporation: Implications for Ethanol Steam Reforming by Song, Hua, Ozkan, Umit S

“…The effect of calcium doping on the performance of Co/CeO2 catalysts in ethanol steam reforming was examined using various characterization techniques…”
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Coke formation during high-temperature CO2 electrolysis over AFeO3 (A = La/Sr) cathode: Effect of A-site metal segregation by Deka, Dhruba J., Kim, Jaesung, Gunduz, Seval, Jain, Deeksha, Shi, Yingjie, Miller, Jeffrey T., Co, Anne C., Ozkan, Umit S.

“…[Display omitted] •A-site non-stoichiometry affects electrochemical properties of (La,Sr)FeO3.•A-site excess leads to higher surface basicity on (La,Sr)FeO3…”
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Probing the Oxygen Reduction Reaction Active Sites over Nitrogen-Doped Carbon Nanostructures (CN x ) in Acidic Media Using Phosphate Anion by Mamtani, Kuldeep, Jain, Deeksha, Zemlyanov, Dmitry, Celik, Gokhan, Luthman, Jennifer, Renkes, Gordon, Co, Anne C, Ozkan, Umit S

“…To probe the active sites of nitrogen-doped carbon nanostructures (CN x ), the effect of dihydrogen phosphate (H2PO4 –) anion on their oxygen reduction…”
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A comparison of N-containing carbon nanostructures (CNx) and N-coordinated iron–carbon catalysts (FeNC) for the oxygen reduction reaction in acidic media by Singh, Deepika, Tian, Juan, Mamtani, Kuldeep, King, Jesaiah, Miller, Jeffrey T., Ozkan, Umit S.

“…[Display omitted] •CNx and FeNC catalysts were compared for ORR activity and stability in acidic media.•The effect of extended exposure to fuel cell and…”
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Ethanol steam reforming over Co-based catalysts: Role of oxygen mobility by Song, Hua, Ozkan, Umit S.

“…The effect of oxygen mobility on the bio-ethanol steam reforming of ZrO 2- and CeO 2-supported cobalt catalysts was investigated. The supported catalysts were…”
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Investigation of Chloride Poisoning Resistance for Nitrogen-Doped Carbon Nanostructures as Oxygen Depolarized Cathode Catalysts in Acidic Media by Mamtani, Kuldeep, Jain, Deeksha, Co, Anne C., Ozkan, Umit S.

“…HCl electrolysis used to manufacture Cl 2 , a compound of high industrial value, suffers from its high energy requirements. Significant energy savings can be…”
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Preferential oxidation of CO (PROX) over CoOx/CeO2 in hydrogen-rich streams: Effect of cobalt loading by Gawade, Preshit, Bayram, Burcu, Alexander, Anne-Marie C., Ozkan, Umit S.

“…XANES studies showed the Co species in the CoOx/CeO2 catalyst to remain as a fully oxidized Co3O4 phase during PROX reaction. [Display omitted] ► Co catalysts…”
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Effect of lanthanum and chlorine doping on strontium titanates for the electrocatalytically-assisted oxidative dehydrogenation of ethane by Dogu, Doruk, Meyer, Katja E., Fuller, Anshuman, Gunduz, Seval, Deka, Dhruba J., Kramer, Nathaniel, Co, Anne C., Ozkan, Umit S.

“…[Display omitted] •Ethylene was produced via electrocatalytically-assisted oxidative dehydrogenation of ethane.•O2− conducting membrane, YSZ and LSM-YSZ were…”
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Oxygen Mobility in Pre-Reduced Nano- and Macro-Ceria with Co Loading: An AP-XPS, In-Situ DRIFTS and TPR Study by Sohn, Hyuntae, Celik, Gokhan, Gunduz, Seval, Dogu, Doruk, Zhang, Shiran, Shan, Junjun, Tao, Franklin Feng, Ozkan, Umit S.

“…The size effect of ceria nanoparticles on surface oxygen mobility and formation of surface oxygen vacancies in ethanol steam reforming was investigated. Higher…”
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Nitrogen-Coordinated Iron−Carbon as Efficient Bifunctional Electrocatalysts for the Oxygen Reduction and Oxygen Evolution Reactions in Acidic Media by Mamtani, Kuldeep, Jain, Deeksha, Co, Anne C, Ozkan, Umit S

“…The ORR and OER performances of N-coordinated iron–carbon (FeNC), Ir/C, and Pt/C catalysts were compared using half-cell measurements. The results suggest…”
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Preferential oxidation of carbon monoxide on Co/CeO2 nanoparticles by Woods, Matthew P., Gawade, Preshit, Tan, Bing, Ozkan, Umit S.

“…A highly active CoOx/CeO2 nanoparticle catalyst with high surface area (78m2/g) has been prepared and tested in the preferential oxidation of carbon monoxide…”
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Hydrogen Production from Water in a Solid Oxide Electrolysis Cell: Effect of Ni Doping on Lanthanum Strontium Ferrite Perovskite Cathodes by Deka, Dhruba J, Gunduz, Seval, Kim, Jaesung, Fitzgerald, Taylor, Shi, Yingjie, Co, Anne C, Ozkan, Umit S

“…High-temperature water electrolysis in a solid oxide electrolysis cell (SOEC) can be an efficient way of producing hydrogen, especially if it can be coupled…”
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Non-metal catalysts for dioxygen reduction in an acidic electrolyte by MATTER, Paul H, OZKAN, Umit S

“…Active non-metal catalysts for the Oxygen Reduction Reaction (ORR) were prepared by decomposition of acetonitrile vapor at 900°C over a pure alumina support,…”
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