Browsing NTNU Open by Author "Rønning, Magnus"
Now showing items 1-20 of 67
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Active sites for the oxygen reduction reaction in nitrogen-doped carbon nanofibers
Buan, Marthe Emelie Melandsø; Cognigni, Andrea; Walmsley, John; Muthuswamy, Navaneethan; Rønning, Magnus (Journal article; Peer reviewed, 2019)Understanding the role of iron and the nature of the active sites in nitrogen-doped carbon nanomaterials is vital for their future application as oxygen reduction electrocatalysts in fuel cells. In this paper, porphyrin-like ... -
Advanced characterization of flame spray pyrolysis prepared catalysts for oxidation of NO to NO2
Meuche, Martin Peter (Master thesis, 2019)Hensikten med denne masteroppgaven var å undersøke bruken av flamme-spray pyrolyse som syntesemetode for krystallinske katalysatorer med store overflater for bruk i oksidasjon av NO til NO 2 . Dette ble gjort gjennom grundig ... -
Atomically dispersed Fe-N-P-C complex electrocatalysts for superior oxygen reduction
Li, Yahao; Chen, Bingxu; Duan, Xuezhi; Chen, Shuangming; Liu, Daobin; Zang, Ketao; Si, Rui; Lou, Fengliu; Wang, Xuehang; Rønning, Magnus; Song, Li; Luo, Jun; Chen, De (Journal article; Peer reviewed, 2019)Development of cost-effective electrocatalysts as an alternative to platinum for oxygen reduction reaction (ORR) is of great significance for boosting the applications of green energy devices such as fuel cells and metal-air ... -
Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al2O3 catalyst
Tsakoumis, Nikolaos; Johnsen, Rune E.; van Beek, Wouter; Rønning, Magnus; Rytter, Erling; Holmen, Anders (Journal article; Peer reviewed, 2016)The reduction of a Re promoted Co/γ-Al2O3 catalyst was monitored in situ by synchrotron X-ray powder diffraction (XRPD) under H2 environment. Whole powder pattern analysis revealed a non-linear expansion of the unit cell ... -
Catalysts for electrochemical conversion of CO2 in aqueous solutions
Hjorth, Ida (Doctoral theses at NTNU;2017:82, Doctoral thesis, 2017)An artificial photosynthesis process can 1) utilise renewable energy from the sun, 2) facilitate convenient energy storage in chemical bonds, 3) supply feed-stock to the chemical industry, and 4) recycle CO2 in a CO2-neutral ... -
Catalytic Oxidation of NO over LaCo1−xBxO3 (B = Mn, Ni) Perovskites for Nitric Acid Production
Salman, Ata ul Rauf; Hyrve, Signe Marit; Regli, Samuel K.; Zubair, Muhammad; Enger, Bjørn Christian; Lødeng, Rune; waller, david; Rønning, Magnus (Journal article; Peer reviewed, 2019)Abstract Nitric acid (HNO3) is an important building block in the chemical industry. Industrial production takes place via the Ostwald process, where oxidation of NO to NO2 is one of the three chemical steps. The reaction ... -
Catalytic oxidation of NO to NO2 for nitric acid production
Salman, Ata ul Rauf (Doctoral theses at NTNU;2019:376, Doctoral thesis, 2019) -
Catalytic oxidation of NO to NO2 for nitric acid production over a Pt/Al2O3 catalyst
Salman, Ata ul Rauf; Enger, Bjørn Christian; Auvray, Xavier; Lødeng, Rune; Menon, Mohan; Waller, David; Rønning, Magnus (Journal article; Peer reviewed, 2018)The oxidation of nitric oxide (NO) to nitrogen dioxide (NO2) is a key step both in NOx abatement technologies as well as in the Ostwald process for nitric acid production. A 1 wt.% Pt/Al2O3 catalyst was used to study ... -
Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion
Swirk, Katarzyna; Rønning, Magnus; Motak, Monika; Beaunier, Patricia; Da Costa, Patrick; Grzybek, Teresa (Journal article; Peer reviewed, 2019)Ce- and Y-promoted double-layered hydroxides were synthesized and tested in dry reforming of methane (CH4/CO2 = 1/1). The characterization of the catalysts was performed using X-ray fluorescence (XRF), X-ray diffraction ... -
CeO2-ZrO2-WO3-based catalysts for Selective Catalytic Reduction of Nitrogen Oxides by Ammonia
Hui, Chun Kin (Master thesis, 2018)Cerium, zirconium and tungsten based catalysts with addition of 3% copper were prepared through the hydrothermal method and incipient wetness impregnation method. The three catalysts produced were named CZW (hydrothermal ... -
Comparative study on the photocatalytic hydrogen producton from methanol over Cu, Pd, Co and Au loaded TiO2
Punchi Patabandige, Charitha Udani; Rønning, Magnus (Peer reviewed; Journal article, 2015)Photocatalytic hydrogen production from a methanol-water solution was investigated in a semi-continuous reactor over different metal-loaded TiO2 catalysts under UltraViolet (UV) light irradiation. The catalysts were mainly ... -
Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation
Zubair, Muhammad; Svenum, Ingeborg-Helene; Rønning, Magnus; Yang, Jia (Peer reviewed; Journal article, 2020)Aiming to achieve enhanced photocatalytic activity and stability toward the generation of H2 from water, we have synthesized noble metal-free core-shell nanoparticles of graphene (G)-wrapped CdS and TiO2 (CdS@G@TiO2) by a ... -
Core-shell particles of C-doped CdS and graphene: A noble metal-free approach for efficient photocatalytic H2 generation
Zubair, Muhammad; Vanhaecke, Estelle Marie M.; Svenum, Ingeborg-Helene; Rønning, Magnus; Yang, Jia (Journal article; Peer reviewed, 2020)To achieve efficient photocatalytic H2 generation from water using earth-abundant and cost-effective materials, a simple synthesis method for carbon-doped CdS particles wrapped with graphene (C-doped CdS@G) is reported. ... -
Correlation of Catalyst Morphology with Attrition Resistance and Catalytic Activity of Fischer-Tropsch Catalysts
Fiske, Thomas Haukli (Master thesis, 2013)Three alumina based support materials for the Fischer-Tropsch synthesis (FTS) catalyst has been prepared and investigated. The three support materials were prepared in order to obtain different mechanical strengths, ... -
Cu-Promoted Fe-Based Catalyst for Biomass-Derived Synthesis Gas for the Fischer-Tropsch Synthesis
Jensen, Lise Saue (Master thesis, 2015)Four alumina supported iron-based catalysts were prepared by incipient wetness impregnation. The Fe loading was kept constant at 15 wt.%, and the Cu loading was varied between 0-5 wt.. The catalyst samples were characterized ... -
Decoding atomic-level structures of the interface between Pt sub-nanocrystals and nanostructured carbon
Cheng, Hongye; Kvande, Ingvar; Zhu, Yi-An; Hammer, Nina; Rønning, Magnus; Walmsley, John; Li, Ping; Qi, Zhiwen; Zhou, Xing-Gui; Chen, De (Journal article; Peer reviewed, 2018)Gaining an insight into the interface structure resulting from the interaction between metal nanoparticles and their supports, particularly under relevant reaction conditions, has been an important topic in heterogeneous ... -
Development of Visible Light-Responsive Photocatalysts for Hydrogen Production from Glycerol
Apan, Shawn Christopher (Master thesis, 2016)Different catalyst preparation methods were performed. In the case of TiO2, the cocatalyst was deposited on commercial TiO2-P25 by wet impregnation. Cu-loaded and Pt-loaded TiO2 was achieved by calcination in static air ... -
Doped carbon nanostructures as metal-free catalysts for oxidative dehydrogenation of light alkanes
Jenssen, Kaia Andersson (Master thesis, 2014)Catalytic reactions are often carried out on various supported metals, these usually being noble metals or metal oxides. Even though metal based catalysts plays a major role in today s industrial processes, they still have ... -
Dry reforming of methane over Zr- and Y-modified Ni/Mg/Al double-layered hydroxides
Swirk, Katarzyna; Galvez, Maria Elena; Motak, Monika; Grzybek, Teresa; Rønning, Magnus; Da Costa, Patrick (Journal article; Peer reviewed, 2018)Zr- and Y-promoted Ni/Mg/Al double-layered hydroxides were investigated in dry reforming of methane, DRM (10% CH4, CH4/CO2 = 1, GHSV = 20,000 h−1) for the first time. Modification of the double-layered hydroxides with 5 wt% ... -
Effect of low loading of yttrium on Ni-based layered double hydroxides in CO2 reforming of CH4
Swirk, Katarzyna; Motak, Monika; Grzybek, Teresa; Rønning, Magnus; Da Costa, Patrick (Journal article; Peer reviewed, 2018)Ni/Al/Mg layered double hydroxides (LDHs) modified with low loading of yttrium (0.2 and 0.4 wt%) were used in dry reforming of methane at 700 °C. Physicochemical characterization, such as: X-ray fluorescence, N2 sorption, ...