Browsing NTNU Open by Author "Hansen, Henrik Erring"
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Adamantyl Side Chains as Anti-Aggregating Moieties in Dyes for Dye-Sensitized Solar Cells
Almenningen, David Moe; Haga, Brita Susanne; Hansen, Henrik Erring; Buene, Audun Formo; Hoff, Bård Helge; Gautun, Odd Reidar (Peer reviewed; Journal article, 2022)Designing and evaluating novel dye concepts is crucial for the development of the field of dye-sensitized solar cells (DSSCs). In our recent report, the novel concept of tethering the anti-aggregation additive chenodeoxycholic ... -
Assessment of the Recombination Resistance in Dye-Sensitized Solar Cells by Photoelectrochemical Techniques
Hansen, Henrik Erring (Master thesis, 2019)En fargestoffbasert solcelle utnytter et fargestoff med et passende båndgap til å eksitere elektroner inn i en halvleder med et høyt båndgap. Transporten av de positive ladningene foregår gjennom en elektrolytt. Denne måten ... -
Band gap alterations of graphitic carbon nitride for photoelectrochemical water splitting
Log, Kristina Dyrli (Master thesis, 2023)En viktig energibærer for framtiden er hydrogengass, hvor utviklingen av effektive grønne produksjonsmetoder er nødvendig for å minimere miljøpåvirkningen av global oppvarming. En slik metode er fotoelektrolyse av vann, ... -
Effect of seven different terthiophene π-spacers on dye performance in dye-sensitized solar cells
Almenningen, David Moe; Hansen, Henrik Erring; Buene, Audun Formo; Hoff, Bård Helge; Gautun, Odd Reidar (Journal article; Peer reviewed, 2022)To ensure high photocurrents from dye-sensitized solar cells (DSSC), it is important that the dye absorbs as much of the energy from the sunlight as possible. To achieve a wide absorption and cover larger parts of the solar ... -
Effect of thiophene-based π-spacers on N-arylphenothiazine dyes for dye-sensitized solar cells
Almenningen, David Moe; Hansen, Henrik Erring; Vold, Martin Furru; Buene, Audun Formo; Venkatraman, Vishwesh; Sunde, Svein; Hoff, Bård Helge; Gautun, Odd Reidar (Peer reviewed; Journal article, 2021)To study the effect of π-spacers on dye performance in DSSC, five novel phenothiazine dyes have been prepared where the number of successive thiophenes in the π-spacer was increased from zero to four. Additionally, a dye ... -
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 ... -
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 ... -
Optimum scavenger concentrations for sonochemical nanoparticle synthesis
Hansen, Henrik Erring; Seland, Frode; Sunde, Svein; Burheim, Odne Stokke; Pollet, Bruno (Journal article; Peer reviewed, 2023)Maintaining nanoparticle properties when scaling up a chemical synthesis is challenging due to the complex interplay between reducing agents and precursors. A sonochemical synthesis route does not require the addition of ... -
PBI som alternativ til Nafion for bruk i PEM brenselceller
Ciwinska, Martyna Honorata (Bachelor thesis, 2024)I dag er det vanlig å bruke Nafion som membranmateriale i proton-utvekslingsmembran (PEM) brenselceller. Det er ønskelig å finne membraner som kan brukes ved temperaturer over 100 °C fordi dette gir bedre kinetikk, øker ... -
Scale-up of Sonochemical Synthesis of Nanocatalysts for Fuel Cells and Electrolyzers
Berge, Thea Birgitte (Master thesis, 2023)Hensikten med dette arbeidet var å oppskalere en sonokjemisk synteserute ved bruk av en 346 kHz ultralyd platetransduser for å produsere Pt/XC72 med reproduserbare egenskaper, og høy katalytisk aktivitet for oksygenreduk ... -
Sonochemical synthesis of Cu-Pt core-shell nanoparticles on a carbon support
Fakhri, Daniel Øvstedal (Master thesis, 2022)Cu@Pt kjerne-skall partikler ble syntetisert ved sonokjemisk reduksjon av CuSO4 • 5H2O i en vandig bufferløsning med pH 5 bestående av 9.9 mmol dm-3 metansyre, HCOOH, og natriumformat, NaCOOH, som valgt radikalsamler. ... -
Sonochemical Synthesis of Cu@Pt Bimetallic Nanoparticles
Hansen, Henrik Erring; Fakhri, Daniel Øvstedal; Seland, Frode; Sunde, Svein; Burheim, Odne Stokke; Pollet, Bruno (Peer reviewed; Journal article, 2022)Reducing the amount of noble metals in catalysts for electrochemical conversion devices is paramount if these devices are to be commercialized. Taking advantage of the high degree of particle property control displayed by ... -
Sonochemical Synthesis of Nanoparticles for Fuel Cells and Electrolyzers
Hansen, Henrik Erring (Doctoral theses at NTNU;2023:215, Doctoral thesis, 2023)Green hydrogen represents an environmentally friendly alternative to fossil fuels as an energy carrier in many different energy-demanding industries. However, commercialized electrochemical conversion devices utilizing ... -
Synthesis of a graphitic carbon nitride electrode for hydrogen production by photoelectrolysis of water and ultrasound deposition of nanoparticles
Nygård, Nicolas Holvik (Master thesis, 2021)Dette prosjektet tar sikte på å produsere hydrogengass fra vann ved hjelp av solstråling for å gi en fornybar energibærer. For å gjøre det, ble en grafittisk karbonnitridelektrode produsert og syntetisert i en enkel ettrinns ... -
Synthetic Efforts to Investigate the Effect of Planarizing the Triarylamine Geometry in Dyes for Dye-Sensitized Solar Cells
Almenningen, David Moe; Engh, Veslemøy Minge; Strømsodd, Eivind Andreas; Hansen, Henrik Erring; Buene, Audun Formo; Hoff, Bård Helge; Gautun, Odd Reidar (Peer reviewed; Journal article, 2022)The geometry of a dye for dye-sensitized solar cells (DSSCs) has a major impact on its optical and electronic properties. The dye structure also dictates the packing properties and how well the dye insulates the metal–oxide ... -
The effect of ultrasound on the synthesis of CuSAPO-34
Høiem, Sander (Master thesis, 2024)For å undersøke om ultralyd kunne forbedre krystalliniteten, overflatearealet og den katalytiske aktiviteten til CuSAPO-34, ble både konvensjonell og ultralydbehandlet CuSAPO-34 syntetisert hydrotermisk med krystalliseringstider ... -
Two routes for sonochemical synthesis of platinum nanoparticles with narrow size distribution
Hansen, Henrik Erring; Seland, Frode; Sunde, Svein; Burheim, Odne Stokke; Pollet, Bruno (Journal article; Peer reviewed, 2021)A novel sonochemical approach to synthesize platinum (Pt) nanoparticles has been developed to produce smaller, and more monodisperse particles than traditional chemical reduction methods such as the sodium borohydride ...