Publications de Seyyed Mohammad Hosseini Hashemi

Membrane-less electrolyzer with porous walls for high throughput and pure hydrogen production

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Steven Alexandre Schenk, Pooria Hadikhani

The present disclosure concerns a membrane-less electrolyzer comprising a first electrode and a second electrode, a first fluidic channel configured to receive an electrolyte, a second fluidic channel configured to receive the electrolyte from the first fl ...

2022

A membrane-less electrolyzer with porous walls for high throughput and pure hydrogen production dagger

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Steven Alexandre Schenk, Pooria Hadikhani

Membrane-less electrolyzers utilize fluidic forces instead of solid barriers for the separation of electrolysis gas products. These electrolyzers have low ionic resistance, a simple design, and the ability to work with electrolytes at different pH values. ...

ROYAL SOC CHEMISTRY2021

Electrochemical reactor

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi

In an electrochemical reactor (R) for producing oxygen and hydrogen by means of electrolysis of an electrolyte (16), wherein the electrochemical reactor (R) comprises a first electrode set (S) and wherein the first electrode set (S) comprises a first elect ...

2020

The Impact of Surfactants on the Inertial Separation of Bubbles in Microfluidic Electrolyzers

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Pooria Hadikhani

Improving the throughput of electrochemical reactions such as water electrolysis is an ongoing effort. In a membrane-less electrolyzer, product separation can be achieved via controlled two-phase flows within the electrochemical flow cells. In this case, i ...

ELECTROCHEMICAL SOC INC2020

The potentials of additive manufacturing for mass production of electrochemical energy systems

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Pooria Hadikhani, Ugljesa Babic

Additive manufacturing has established itself as a popular and powerful tool in electrochemistry research and development. In this short review, we focus on the latest results in both 3D printing and electrochemistry communities that could potentially bene ...

ELSEVIER2020

Solar-Electrochemical Platforms for Sodium Hypochlorite Generation in Developing Countries

Demetri Psaltis, Christophe Moser, Seyyed Mohammad Hosseini Hashemi, Enrico Chinello

On-site generation of sodium hypochlorite (NaClO) holds the potential to bring an efficient and cost-effective water disinfection method to isolated and remote locations. Solar-driven, stand-alone reactors could provide those communities full independence ...

ELECTROCHEMICAL SOC INC2019

Learning from droplet flows in microfluidic channels using deep neural networks

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Pooria Hadikhani

A non-intrusive method is presented for measuring different fluidic properties in a microfluidic chip by optically monitoring the flow of droplets. A neural network is used to extract the desired information from the images of the droplets. We demonstrate ...

Nature Research2019

Inertial manipulation of bubbles in rectangular microfluidic channels

Demetri Psaltis, Gioele Mariano Nicolò Balestra, François Gallaire, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino, Lailai Zhu, Pooria Hadikhani

Inertial microfluidics is an active field of research that deals with crossflow positioning of the suspended entities in microflows. Until now, the majority of the studies have focused on the behavior of rigid particles in order to provide guidelines for m ...

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

Efficient Solar-vapor Generation in Hollow-mesoporous Plasmonic Nanoshells

Jeffrey Alan Hubbell, Thomas La Grange, Demetri Psaltis, Jae-Woo Choi, Seyyed Mohammad Hosseini Hashemi, Ye Pu, Marcin Stefan Zielinski, Miguel Antonio Modestino

Plasmonic nanostructures have shown great promise in solar thermal applications. Here we report highly efficient solar vapor generation using hollow-mesoporous plasmonic nanoshells, where the steam production is significantly enhanced by the extended activ ...

IEEE2018

Membrane-less micro fuel cell based on two-phase flow

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino, Pooria Hadikhani

Most microfluidic fuel cells use highly soluble fuels and oxidants in streams of liquid electrolytes to overcome the mass transport limitations that result from the low solubility of gaseous reactants such as hydrogen and oxygen. In this work, we address t ...

2017

Microfluidic Energy Conversion Devices

Seyyed Mohammad Hosseini Hashemi

Renewable resources of energy are increasing their share in our energy portfolio thanks to the technological advancements and an increasing environmental awareness in society. Although the cost of power generation from these resources has been reduced to r ...

EPFL2017

Hollow Mesoporous Plasmonic Nanoshells for Enhanced Solar Vapor Generation

Jeffrey Alan Hubbell, Thomas La Grange, Demetri Psaltis, Jae-Woo Choi, Ye Pu, Seyyed Mohammad Hosseini Hashemi, Ye Pu, Marcin Stefan Zielinski, Miguel Antonio Modestino

In the past decade, nanomaterials have made their way into a variety of technologies in solar energy, enhancing the performance by taking advantage of the phenomena inherent to the nanoscale. Recent examples exploit plasmonic core/shell nanoparticles to ac ...

American Chemical Society2016

Device and System Having Water Microelectrolyzer Cells and Method of Using the Same

Demetri Psaltis, Christophe Moser, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino

A device having a water vapor microelectrolyzer cell including microstructured parallel electrodes where the water splitting reactions can take place, the microstructured electrodes being covered by a thin layer of solid-state ion conducting material to al ...

2016

The potential for microfluidics in electrochemical energy systems

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino

Flow based electrochemical energy conversion devices have the potential to become a prominent energy storage technology in a world driven by renewable energy sources. The optimal design of these devices depends strongly on the tradeoffs between the losses ...

Royal Society of Chemistry2016

Mass transport aspects of electrochemical solar-hydrogen generation

Sophia Haussener, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino

The conception of practical solar-hydrogen generators requires the implementation of engineering design principles that allow photo-electrochemical material systems to operate efficiently, continuously and stably over their lifetime. At the heart of these ...

Royal Soc Chemistry2016

Membrane-less electrolyzer

Demetri Psaltis, Jae-Woo Choi, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino

The present invention concerns a membrane-less electrolyzer comprising a fluidic channel for receiving an electrolyte fluid; a first electrode and a second electrode located inside the fluidic channel, the first and second electrode permitting to extract a ...

2016

A membrane-less electrolyzer for hydrogen production across the pH scale

Demetri Psaltis, Seyyed Mohammad Hosseini Hashemi, Miguel Antonio Modestino

The development of deployable water-splitting devices is hindered by the cost of electricity and the lack of stable ion conducting membranes that can operate across the pH scale, impose low ionic resistances and avoid product mixing. The membrane-less appr ...

Royal Society of Chemistry2015

Vapor-fed microfluidic hydrogen generator

Demetri Psaltis, Christophe Moser, Sophia Haussener, Seyyed Mohammad Hosseini Hashemi, Mikaël Dumortier, Miguel Antonio Modestino

Water-splitting devices that operate with humid air feeds are an attractive alternative for hydrogen production as the required water input can be obtained directly from ambient air. This article presents a novel proof-of-concept microfluidic platform that ...

Royal Society of Chemistry2015

Solar thermal harvesting for enhanced photocatalytic reactions

Demetri Psaltis, Jae-Woo Choi, Seyyed Mohammad Hosseini Hashemi

The Shockley-Queisser limit predicts a maximum efficiency of 30% for single junction photovoltaic (PV) cells. The rest of the solar energy is lost as heat and due to phenomena such as reflection and transmission through the PV and charge carrier recombinat ...

Royal Society of Chemistry2014