REMA
Enabling the universal

use of green hydrogen
why Hydrogen?
Despite the considerable promise held by green hydrogen as a versatile and eco-friendly method for decarbonization, its broad acceptance still encounters constraints. The expense associated with producing green hydrogen persists as a significant hurdle, particularly when contrasted with more economical options rooted in fossil fuels.

Presently, green hydrogen constitutes less than 1% of total hydrogen production. Therefore, it stands as a critical imperative to reduce its cost from the current range of $6 to $12 per kilogram down to $2 per kilogram. Achieving this reduction is essential for rendering it a financially feasible resolution and facilitating the transition towards a decarbonized industry.
OUR Technology
REMA's mission is to provide the world with access to cost-effective and high-quality green hydrogen. By using fluid mechanics and membrane-less electrolysis, we have eliminated the cost barriers posed by conventional membranes. Our technology thrives at higher operating temperatures, is robust in nature, and attains unprecedented efficiency levels. REMA is the catalyst for a world powered by affordable, sustainable, and green hydrogen.

REMA's electrolyzer introduces a simplified design that greatly enhances affordability in production. This design can be manufactured through standard methods (such as plastic injection) and cost-effective conventional manufacturing processes. Furthermore, its innovative membrane-less assembly not only offers extensive material and electrolyte flexibility but also enables the application of this electrolyzer under challenging conditions as well as different electrochemical processes.
1
water electrolysis principle
Water electrolysis is a chemical process that uses electricity to split water (H2O) into its constituting elements: hydrogen (H2) and oxygen (O2).
2
Conventional electrolysers
Among the widely recognised methods of water electrolysis are alkaline water electrolysis (AWE), proton exchange membrane electrolysis (PEM), and solid oxide electrolysis (SOE). While these methods operate on the same fundamental principle, they exhibit variations in terms of efficiency, cost, and complexity.
3
Temperature
is key
Operating at a high temperature of 800°C offers improved efficiency but comes with significant challenges in manufacturing and operation. With well-established technologies like AWE, the primary limitation arises from their use of polymeric membranes, which can handle temperatures up to 90°C
4
Our membrane-less approach
In response, REMA's patented technology relies on precise electrolyte flow control and an optimised reactor design. This innovation allows us to effectively segregate the produced hydrogen and oxygen, even at elevated temperatures of 145°C without the use of a polymeric membrane. This temperature increase significantly enhances efficiency without necessitating the use of exotic materials that can endure extreme conditions.
5
Scalability in mind
A key advantage of our patented technology is its scalability, enabling us to meet the expanding demands of the hydrogen market.
Our solution
Rema Small
REMA SMALL is a stand-alone 2.5kW membrane-less electrolyzer for hydrogen production planned for release in early 2025. This product is ideal for small-scale units producing around 1kg of hydrogen a day for demonstrations, light mobility, and gadgets like drones, bikes, or light towers.
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Rema Large
Rema Large
REMA LARGE  is a stand-alone 50kW membrane-less electrolyzer for hydrogen production planned for release in early 2030. This product is ideal for medium to large-scale centralized units producing around 1kg of hydrogen an hour for refuelling stations, seasonal storage and industrial applications.
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Performance
Our technology combines the best of low-temperature and high-temperature techniques, within a simple and robust design based on a mature technology. By raising the temperature, we have achieved a significant boost in performance.
Key numbers
Our team is currently in the process of developing a  cutting-edge standalone system with a power output of 2.5 kW. This system represents our debut product in the market, featuring a 90% stack efficiency and a lifespan exceeding a decade.
Stack Efficiency HHV
90%
Stack lifetime
> 10 years
Stack Power Consumption
44.35 kWh/kg H2
Performance comparison
Graph showing a way better performance for Rema technology over commercial technology
TEAM
Steven Schenk
Co-Founder and CEO
Mechanical engineer from the Ecole Polytechnique Federal de Lausanne (Switzerland), he brings his expertise in energy and electrochemical reactors in the development of the company.
Demetri Psaltis
Co-Founder, business and scientific advisor
Head of the Laboratory of Optics in the Ecole Polytechnique Federal de Lausanne (Switzerland), he created and supported the research and development of REMA's technology. Over his academic career a successfully founded, grew and exited 2 companies.
Nikolaos Stergiopulos
Co-Founder, business and scientific advisor
Head of the Laboratory of Hemodynamics and Cardiovascular Technology in EPFL, he has supported the research and development of REMA's technology and now host the research. He has until now founded and grew four companies, two of them exited.
Francesco Gelain
System engineering
Sustainable energy engineer from the Royal Institute of Technology of Stockholm (Sweden), he bring his
expertise in industrial engineering and energy system for the system integration of the technology.
Ioakeim Sioutis
Co-Founder and CTO
Mechanical engineer from National Technical University of Athens (Greece), he brings his expertise in mechanical design and electrochemical reactors in the development of the company.
Pooria Hadikhani
Co-Founder and fluid mechanics expert
Dr. in Mechanical engineering from the Ecole Polytechnique Federal de Lausanne (Switzerland), he has made his doctoral thesis on multi-phase electrochemical reactor, the ground of REMA's technology.
Carlo Gigli
Optics and electronics expert
Dr. in physics from Paris University, he brings his expertise in optics and electronics for the technology characterization and automation.
Evangelos Psaradellis
Control and power electronics expert
Electrical engineer from National Technical University of Athens (Greece), he brings his power
electronics and control expertise for powering the stack and automation of the system.
Contact
Get in touch with us and let's explore how we can collaborate to drive innovation.
Our support