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Sophia Haussener

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Related publications (135)

Optimizing Mesostructured Silver Catalysts for Selective Carbon Dioxide Conversion into Fuels

Mesostructured silver catalysts have shown a substantial rise in reaction selectivity for the conversion of CO2 into fuels with increasing thickness of ordered, inverse-opal films. The challenge lies in the optimization of the morphology to maximize the CO ...

2019

Integrated photo-electrochemical device for concentrated irradiation

Sophia Haussener, Meng Lin, Saurabh Yuvraj Tembhurne

The present invention relates to a photo-electrochemical device for production of a gas, liquid or solid using concentrated electromagnetic irradiation. The device comprises a photovoltaic component configured to generate charge carriers from the concentra ...

2019

Sequential Cascade Electrocatalytic Conversion of Carbon Dioxide to C-C Coupled Products

Sophia Haussener

Cascade catalytic processes perform multi-step chemical transformations without isolating the intermediates. Here, we demonstrate a sequential cascade pathway to convert CO2 to C2+ hydrocarbons and oxygenates in a two-step electrocatalytic process using CO ...

2019

Steam Gasification of Carbonaceous Feedstocks via a 1.5 kWth Hybrid Solar/Autothermal Reactor

Iacopo Guscetti, Sophia Haussener

A continuous method of steam gasification through hybridization of a solar reactor with an autothermal gasification process is proposed and tested. The ability to autothermally gasify a carbonaceous feedstock within a solar reactor enables round-the-clock ...

AMER INST PHYSICS2019

Rapid Performance Optimization Method for Photoelectrodes

Yannick Kenneth Gaudy, Sophia Haussener

We report the development of a rapid method for the performance optimization of photoelectrodes. The method requires as an input incident photon-to-current efficiency (IPCE) measurements of a material at two or more wavelengths, an estimation of the comple ...

2019

A thermally synergistic photo-electrochemical hydrogen generator operating under concentrated solar irradiation

Sophia Haussener, Saurabh Yuvraj Tembhurne, Fredy Intelligent Nandjou Dongmeza

Achieving high current densities while maintaining high energy conversion efficiency is one of the main challenges for enhanc-ing the competitiveness of photo-electrochemical devices. We describe a concept that allows this challenge to be overcome by opera ...

2019

Majority Charge Carrier Transport in Particle-based Photoelectrodes

Yannick Kenneth Gaudy, Sophia Haussener

The inter-particle charge transfer of particle-based photoelectrodes was investigated using a particle-based LaTiO2N photoelectrode as model system. The thickness-dependent front- to back-side illumination photocurrent ratio was measured and compared to th ...

2019

Inverse Analysis of Radiative Flux Maps for the Characterization of High Flux Sources

Sophia Haussener, Gaël Jean Clément Levêque, Clemens Gregor Suter

The reconstruction of the angular and spatial intensity distribution from radiative flux maps measured in high flux solar simulators or optical concentrators is an ill-posed inverse problem requiring special solution strategies. We aimed at providing a sol ...

2019

Integrated photo-electrochemical device for concentrated irradiation

Sophia Haussener, Meng Lin, Saurabh Yuvraj Tembhurne

2018

Pathways to Electrochemical Solar-Hydrogen Technologies

Corsin Battaglia, Esther Alarcon Llado, Sophia Haussener, Seyyed Mohammad Hosseini Hashemi, Jan-Willem Alexander Schüttauf, Miguel Antonio Modestino, Enrico Chinello, Vincent Artero

2018

Determination and optimization of material parameters of particle-based LaTiO2N photoelectrodes

Ulrich Aschauer, Yannick Kenneth Gaudy, Sophia Haussener

We developed a validated numerical model capable of predicting the photocurrent-voltage characteristics of oxide and oxynitride particle-based photoelectrodes and identifying the critical parameters affecting the performance of those photoelectrodes. We us ...

Royal Society of Chemistry2018

Optical characterization of multi-scale morphologically complex heterogeneous media – Application to snow with soot impurities

Sophia Haussener, Xiaoyu Dai

A multi-scale methodology for the radiative transfer analysis of heterogeneous media composed of morphologically-complex components on two distinct scales is presented. The methodology incorporates the exact morphology at the various scales and utilizes vo ...

Elsevier2018

Linking Morphology and Multi-Physical Transport in Structured Photoelectrodes

Marco Cantoni, Yannick Kenneth Gaudy, Sophia Haussener, Silvan Suter

Semiconductors with complex anisotropic morphologies in solar to chemical energy conversion devices enhance light absorption and overcome limiting charge transport in the solid. However, structuring the solid-liquid interface has also implications on conce ...

2018

Transport characteristics of saturated gas diffusion layers treated with hydrophobic coatings

Mathias Raphaël Niffeler, Sophia Haussener, Seyedmohamad Moosavi

Water flooding of cathodic gas diffusion layers (GDLs) in proton-exchange membrane fuel cells at high current densities or low temperatures limits efficient operation due to disturbed transport of reactants to the catalytic sites or products away into the ...

Elsevier2018

Solar production of nylon polymers and prescursors for nylon polymer production

Sophia Haussener, Miguel Antonio Modestino

The present invention relates to process intensification, and renewable processing routes for polymer production, for example the solar production of Nylon 6,6 and precursors relevant for the Nylon 6,6 production (such as hydrogen, adiponitrile and hexaned ...

2018

Modeling and design guidelines for direct steam generation solar receivers

Sophia Haussener, Meng Lin

Concentrated solar energy is an ideal energy source for hightemperature energy conversion processes such as concentrated solar power generation, solar thermochemical fuel production, and solar driven hightemperature electrolysis. Indirectly irradiated sola ...

2018

Design and demonstration of a prototype 1.5 kWth hybrid solar/autothermal steam gasifier

Iacopo Guscetti, Sophia Haussener

A 1.5 kWth hybrid solar/autothermal steam gasifier was designed and tested for continuously producing synthesis gas. Time-averaged responses to a series of inlet flow conditions were examined in a high-flux solar simulator. The gasifier consisted of a SiC ...

Elsevier Sci Ltd2018

An integrated concentrated solar fuel generator utilizing a tubular solid oxide electrolysis cell as solar absorber

Sophia Haussener, Meng Lin

We numerically assessed the potential of a solar reactor concept for efficient fuel processing under concentrated solar irradiation. This design integrates a cavity receiver, a tubular solid oxide electrolyzer, and the concentrated photovoltaic cells into ...

2018

Atomic layer deposition of TiO2 for stabilization of Pt nanoparticle oxygen reduction reaction catalysts

Sarah van Rooij, Sophia Haussener

Atomic layer deposition (ALD) was used to modify two different types of carbon black-based Pt oxygen reduction catalysts with protective TiO2 nanostructures to increase catalyst durability. Rates of ALD growth and the structure of deposited TiO2 were obser ...

Springer2018

Radiative characterization of random fibrous media with optically large long cylindrical fibers

Sophia Haussener

Radiative heat transfer is analyzed in participating media consisting of long cylindrical fibers with a diameter in the limit of geometrical optics. The absorption and scattering coefficients and the scattering phase function of the medium are determined b ...

Elsevier2017

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