Browsing NTNU Open by Author "Pollet, Bruno"
Now showing items 21-40 of 77
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Flow Field Patterns for Proton Exchange Membrane (PEM) Fuel Cells
Sauermoser, Marco; Kizilova, Nataliya; Pollet, Bruno; Kjelstrup, Signe (Journal article; Peer reviewed, 2020)Flow field designs for the bipolar plates of the proton exchange membrane fuel cell are reviewed; including the serpentine, parallel, interdigitated, mesh type or their mixtures, furthermore 2D circular and 3D tubular ... -
Fractal-Like Flow-Fields with Minimum Entropy Production for Polymer Electrolyte Membrane Fuel Cells
Kizilova, Nataliya; Sauermoser, Marco; Kjelstrup, Signe; Pollet, Bruno (Journal article; Peer reviewed, 2020) -
Frequency controlled agglomeration of pt-nanoparticles in sonochemical synthesis
Hansen, Henrik Erring; Seland, Frode; Sunde, Svein; Burheim, Odne Stokke; Pollet, Bruno (Peer reviewed; Journal article, 2022)Optimizing the surface area of nanoparticles is key to achieving high catalytic activities for electrochemical energy conversion devices. In this work, the frequency range (200 kHz–500 kHz) for maximum sonochemical radical ... -
From bad electrochemical practices to an environmental and waste reducing approach for the generation of active hydrogen evolving electrodes
Ring, Lisa; Pollet, Bruno; Chatenet, Marian; Abbou, Sofyane; Küpper, Karsten; Schmidt, Mercedes; Huck, Marten; Gries, Aurelia; Steinhart, Martin; Schäfer, Helmut (Journal article; Peer reviewed, 2019)The electrodeposition of noble metals using corresponding dissolved metal salts represents an interesting process for the improvement of the electrocatalytic Hydrogen Evolution Reaction (HER) properties of less active ... -
Graphene inclusion effect on anion-exchange membranes properties for alkaline water electrolyzers
Ion-Ebrasu, Daniela; Pollet, Bruno; Caprarescu, Simona; Chitu, Alin; Trusca, Roxana; Niculescu, Violeta; Gabor, Raluca; Carcadea, Elena; Varlam, Mihai; Vasile, Bogdan Stefan (Peer reviewed; Journal article, 2020)The main issues facing the development of Anion Exchange Membranes (AEM) are the low hydroxide ion (OH−) conductivity compared to protons (H+), and the thermal and chemical stability. Based on the its unique two-dimensional ... -
Graphene Modified Fluorinated Cation-Exchange Membranes for Proton Exchange Membrane Water Electrolysis
Ion-Ebrasu, Daniela; Pollet, Bruno; Spinu-Zaulet, Adnana; Soare, Amalia; Carcadea, Elena; Varlam, Mihai; Caprarescu, Simona (Journal article; Peer reviewed, 2019)One of major current technical challenges in proton exchange membrane water electrolysis (PEMWE) is the limited proton conductivity. Nowadays, graphene is considered one of the most promising candidates for improving the ... -
Hierarchical core-shell structured CoNi2S4/Ni3S2@Ni(OH)2 nanosheet arrays as electrode for electrochemical energy storage
Chen, Fangshuai; Wang, Hui; Ji, Shan; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)Herein, hierarchical core-shell structured CoNi2S4/Ni3S2@Ni(OH)2 nanosheet arrays are synthesized through a facile method. The electrochemical results show that combining CoNi2S4/Ni3S2 nanosheet arrays (as core) with Ni(OH)2 ... -
Highly active porous Co–B nanoalloy synthesized on liquid-gas interface for hydrolysis of sodium borohydride
Wang, Xingpu; Liao, Jinyun; Li, Hao; Wang, Hui; Wang, Rongfang; Pollet, Bruno; Ji, Shan (Journal article; Peer reviewed, 2018)Porous Co–B nanoalloy is a low-cost and highly active catalyst towards the hydrolysis of sodium borohydride (NaBH4). In this study, a facile and room-temperature hydrogen bubble-assisted method was developed to prepare ... -
A highly efficient water electrolyser cell assembled by asymmetric array electrodes based on Co, Fe-doped Ni(OH)2 nanosheets
Wu, Yutai; Ji, Shan; Pollet, Bruno; Wang, Xuyun; Wang, Rongfang (Peer reviewed; Journal article, 2020)Hydrogen is an “ideal” clean sustainable energy source if it is produced via water electrolyser using power generated by renewable energy systems (RES) such as solar panels and wind turbines. In this study, cobalt (Co) and ... -
Hollow core-shell structured Cu2O@Cu1.8S spheres as novel electrode for enzyme free glucose sensing
Cao, Miaomiao; Wang, Hui; Ji, Shan; Zhao, Qian; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)This study reports a novel hollow Cu2O@Cu1.8S material used as a catalyst for enzyme free glucose detection. Cu2O@Cu1.8S is successfully synthesized by a facile in-situ growth method. The obtained Cu2O@Cu1.8S exhibits a ... -
How do dissolved gases affect the sonochemical process of hydrogen production? An overview of thermodynamic and mechanistic effects – On the “hot spot theory”
Kerboua, Kaouther; Merouani, Slimane; Hamdaoui, Oualid; Alghyamah, Abdulaziz; Islam, Md Hujjatul; Hansen, Henrik Erring; Pollet, Bruno (Peer reviewed; Journal article, 2020)Although most of researchers agree on the elementary reactions behind the sonolytic formation of molecular hydrogen (H2) from water, namely the radical attack of H2O and H2O2 and the free radicals recombination, several ... -
How to Avoid Total Dissolved Gas Supersaturation in Water from Hydropower Plants by Employing Ultrasound
Rognerud, Maren Elise; Solemslie, Bjørn Winther; Islam, Md Hujjatul; Pollet, Bruno (Peer reviewed; Journal article, 2020)In Norway, more than 10 hydropower plants are known to have caused biologically relevant levels of total dissolved gas supersaturation in the rivers downstream power plants. This phenomenon is causing fish kills due to gas ... -
The Impact of Peltier and Dufour Coefficients on Heat Fluxes and Temperature Profiles in the Polymer Electrolyte Fuel Cells
Sauermoser, Marco; Kjelstrup, Signe; Pollet, Bruno (Peer reviewed; Journal article, 2020)We show that the coupling effects in non-equilibrium thermodynamics for heat-, mass- and charge- transport in the polymer electrolyte membrane fuel cell (PEMFC) all give significant contributions to local heat effects. The ... -
(Invited) Novel Fuel Production Based on Sonochemistry and Sonoelectrochemistry
Islam, Md. H.; Lamb, Jacob J.; Lien, Kristian M.; Burheim, Odne Stokke; Hihn, Jean-Yves; Pollet, Bruno (Journal article; Peer reviewed, 2019)Sonochemistry has been used in many applications where it is employed to improve both catalytic and synthetic processes; whereas, sonoelectrochemistry has been used in various studies including organic syntheses, environmental ... -
Liquid air energy storage – analysis and prospects
Liu, Zhongxuan; Ustolin, Federico; Spitthoff, Lena; Lamb, Jacob Joseph; Gundersen, Truls; Pollet, Bruno; Burheim, Odne Stokke (Chapter, 2020) -
Measuring the thermal conductivity of membrane and porous transport layer in proton and anion exchange membrane water electrolyzers for temperature distribution modeling
Bock, Robert; Karoliussen, Håvard; Seland, Frode; Pollet, Bruno; Thomassen, Magnus; Holdcroft, Steven; Burheim, Odne Stokke (Journal article; Peer reviewed, 2019)Water electrolyzers that use a membrane electrolyte between the electrodes are a promising technology towards mass production of renewable hydrogen. High power setups produce a lot of heat which has to be transported through ... -
Mesoporous CoS/ N‐doped Carbon as HER and ORR Bifunctional Electrocatalyst for Water Electrolysers and Zinc‐Air Batteries
Ding, Jieting; Ji, Shan; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)Hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are two critical electrocatalytic reactions, involved in many sustainable and green electrochemical energy conversion and storage technologies. Transition ... -
Mesoporous CoS/ N‐doped Carbon as HER and ORR Bifunctional Electrocatalyst for Water Electrolysers and Zinc‐Air Batteries
Ding, Jieting; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)Hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are two critical electrocatalytic reactions, involved in many sustainable and green electrochemical energy conversion and storage technologies. Transition ... -
MnO/N-doped Mesoporous Carbon as Advanced Oxygen Reduction Reaction Electrocatalyst for Zinc-air Batteries
Ding, Jieting; Ji, Shan; Wang, Hui; Brett, Dan J L; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)The development of alternative electrocatalysts exhibiting high activity in the oxygen reduction reaction (ORR) is vital for the deployment of large‐scale clean energy devices, such as fuel cells and zinc–air batteries. ... -
MOF derived graphitic carbon nitride/oxygen vacancies-rich zinc oxide nanocomposites with enhanced supercapacitive performance
Shen, Jiaqi; Wang, Peng; Jiang, Huasheng; Wang, Hui; Pollet, Bruno; Wang, Rongfang; Ji, Shan (Peer reviewed; Journal article, 2020)Supercapacitors with high power density and durability have shown enormous potential for smart electronics. Herein, a novel graphitic carbon nitride (g-C3N4) coated with oxygen vacancies-rich ZnO (OZCN) nanocomposites was ...