Joris Proost
Recent publications

research activities relates most generally to unraveling thermodynamic, kinetic, structural, electronic and mechanical aspects underlying the reactivity of metals and metal oxides in both gaseous and aqueous environments. Fundamental questions in this respect are being adressed for a number of model systems of direct relevance for energy conversion and electronic applications, as well as in the field of environmental electrochemistry. They can be classified into the following 4 categories : (1) electrochemical synthesis of nanoporous anodic oxides ; (2) reactive sputter deposition of transparent conducting oxides ; (3) interaction of hydrogen with nanocrystalline metallic thin films ; (4) 3-D porous electrodes for electrochemical hydrogen production.

A particular research interest relates to the precise in-situ measurement and control of the internal stress evolution in ultrathin films and multilayers. This has allowed uptil now to provide, for the above-cited model systems, direct and quantitative evidence of mechano-chemical and/or mechano-electrochemical coupling effects in both gaseous (i.e. hydrogen-containing) and aqueous reactive environments.

Research group(s): IMAP

PhD and Post-doc researchers under my supervision:

Nanostructured porous nickel electrodes for photo-electrochemical hydrogen production
Adeline Delvaux

Adeline obtained her master in Chemical and Materials Engineering at Université catholique de Louvain (Belgium) in 2014. Since then, she is working under the supervision of Prof. Joris Proost on the hydrogen production by water electrolysis with the view to replace actual energy sources by cleaner ones. The goal of her research consists in improving the electrochemical cell efficiency by tailoring nickel electrodes in order to favor gas bubble detachment and then reduce the overpotential due to mass transport. This is done by depositing Al-Ni alloys by magnetron co-sputtering, and then by chemically treating these alloys in a concentrated hydroxide solution with the aim of leaching out the Al. Another aspect of her research focus on the hydrogen absorption by nickel electrode during hydrogen evolution reaction. It consists in studying the hydriding mechanisms of Ni thin film electrodes into aqueous medium as well as characterize their internal stresses and microstructure effects as a function of their processing conditions since they influence kinetics and thermodynamics of hydriding.

Study of reaction mechanisms of chemical wet etching and frosting of glass substrates
Nicolas Piret

This research project is about bringing a fundamental understanding of the glass frosting process and its different corresponding chemical processes.
Indeed, although this process is higly used in the glass industry, there is only few fundamental researches that were led on the whole glass frosting process.
This project will try to answer to these questions : What are the different chemical steps that lead to glass surface microstructuration, giving this matt aspect of a frosted glass ? What are the roles and influences of each chemical used in the etching solution on the reaction kinetics and on the glass aspect?
To try to answer to these questions the glass dissolution mecanism and its kinetics are studied via gravimetric analysis of glass substrates and ICP analysis of etching solutions. The precipitate occuring on the glass surface during the frosting, leading to the microstructuration will be characterized and its kinetics will be determined.

Raphaël Poulain

Quentin de Radiguès de Chennevières

is working in the field of the energy transition. In order to increase the share of renewable energies, new ways of storing electricity have to be developed. Hydrogen has the advantage to be able to store energy over a long time while it can be used as fuel for vehicles. In his Ph.D. thesis on Process Intensification in electrochemical reactors defended in december 2016, he has developed a new technology to reduced the cost of alcaline water electrolysis for hydrogen production. He is now applying this technology on a pilot plant scale.

HyFlux - WallonHY
Grégoire Thunis

Green hydrogen will play a key role in decarbonizing the chemical industry, storing green electricity, or even in the way we heat ourselves. But there is still some way to go to improve the sector's capacities and reduce production costs.

HyFlux is a spin-off project of UCLouvain that aims to enable the large-scale development of green hydrogen. To achieve this, HyFlux significantly increases the productivity of alkaline water electrolysis cell stacks by using innovative patented technology. This increased productivity in turn reduces the CAPEX of electrolysers and therefore ultimately the cost of hydrogen production.

HyFlux's innovative technology is based on the use of three-dimensional electrodes, forced electrolyte flow and pulsed electrical power. The technology, already demonstrated at the lab scale, is being integrated on an industrial scale pilot. This successful integration will be a key milestone in convincing our future customers, electrolyzer manufacturers, to collaborate with us and purchase our electrodes. I am working on the industrialisation of our technology and the successful development of our project.

Recent publications

See complete list of publications

Journal Articles

1. Proost, Joris; Delvaux, Adeline. In-situ monitoring of hydrogen absorption into Ni thin film electrodes during alkaline water electrolysis. In: Electrochimica Acta, Vol. 322, p. 134752 (2019). doi:10.1016/j.electacta.2019.134752.

2. Dolci, Francesco; Thomas, Denis; Hilliard, Samantha; Guerra, Carlos Fúnez; Hancke, Ragnhild; Ito, Hiroshi; Jegoux, Mathilde; Kreeft, Gijs; Leaver, Jonathan; Newborough, Marcus; Proost, Joris; Robinius, Martin; Weidner, Eveline; Mansilla, Christine; Lucchese, Paul. Incentives and legal barriers for power-to-hydrogen pathways: An international snapshot. In: International Journal of Hydrogen Energy, Vol. 44, no.23, p. 11394-11401 (2019). doi:10.1016/j.ijhydene.2019.03.045.

3. Proost, Joris. State‐of‐the art CAPEX data for water electrolysers, and their impact on renewable hydrogen price settings. In: International Journal of Hydrogen Energy, Vol. 44, no. 9, p. 4406-4413 (2019). doi:10.1016/j.ijhydene.2018.07.164.

4. Chehade, Zaher; Mansilla, Christine; Lucchese, Paul; Hilliard, Samantha; Proost, Joris. Review and analysis of demonstration projects on power-to-X pathways in the world. In: International Journal of Hydrogen Energy, Vol. 44, no.51, p. 27637-27655 (2019). doi:10.1016/j.ijhydene.2019.08.260.

5. Poulain, Raphaël; Proost, Joris; Klein, Andreas. Sputter Deposition of Transition Metal Oxides on Silicon: Evidencing the Role of Oxygen Bombardment for Fermi‐Level Pinning. In: physica status solidi (a), Vol. 216, no.23, p. 1900730 (2019). doi:10.1002/pssa.201900730.

6. de Radiguès de Chennevières, Quentin; Thunis, Grégoire; Proost, Joris. On the use of 3-D electrodes and pulsed voltage for the process intensification of alkaline water electrolysis. In: International Journal of Hydrogen Energy, Vol. 44, p. 29432-29440 (2019).

7. Delmelle, Renaud; Terreni, Jasmin; Remhof, Arndt; Heel, Andre; Proost, Joris; Borschulte, Andreas. Evolution of Water Diffusion in a Sorption-Enhanced Methanation Catalyst. In: Catalysts, Vol. 8, no.9, p. 341 (2018). doi:10.3390/catal8090341 (registering DOI).

8. Piret, Nicolas; Santoro, Ronny; Dogot, Loïck; Barthélemy, Bastien; Peyroux, Eugénie; Proost, Joris. Influence of glass composition on the kinetics of glass etching and frosting in concentrated HF solutions. In: Journal of Non-Crystalline Solids, Vol. 499, p. 208-216 (2018). doi:10.1016/j.jnoncrysol.2018.07.030.

9. Lumbeeck, Gunnar; Idrissi, Hosni; Amin-Ahmadi, Behnam; Favache, Audrey; Delmelle, Renaud; Samaee, Vahid; Proost, Joris; Pardoen, Thomas; Schryvers, Dominique. Effect of hydriding induced defects on the small-scale plasticity mechanisms in nanocrystalline palladium thin films. In: Journal of Applied Physics, Vol. 124, no.22, p. 225105 (2018). doi:; 10.1063/1.5055274.

10. Poulain, Raphaël; Klein, Andreas; Proost, Joris. Electro‐catalytic properties of (100), (110) and (111) oriented NiO thin films towards the Oxygen evolution reaction. In: The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, Vol. 122, p. 22252-22263 (2018). doi:10.1021/acs.jpcc.8b05790.


1. Proost, Joris; de Radiguès de Chennevières, Quentin; Thunis, Grégoire. Gas evolving electrode for process intensification.

2. Proost, Joris; de Radiguès de Chennevières, Quentin; Thunis, Grégoire. System for process intensification of water electrolysis.

3. Boucher, N.; Clément, Nicolas; Cosijns, Bruno; Lambricht, Thomas; De Maeyer, Barbara; Proost, Joris. Mirror.

4. Proost, Joris; Delmelle, Renaud; Michotte, Sébastien. Device, method and system for improved uptake, storage and release of hydrogen.

5. Proost, Joris; Santoro, Ronny; Soumillion, Patrice; Flandre, Denis; Deschuyteneer, Geneviève. Genetically modified bacteriophage, biosensor containing same, and method of use.

6. Beyer, Gerald; Maex, Karen; Proost, Joris. Method of filling an opening in an insulation layer.

7. Helsen, Jozef; Proost, Joris; Brauns, Etienne. Process for preparing glass and for conditioning the raw materials intended for this glass preparation.

Conference Papers

1. Proost, Joris. Critical assessment of the P2H scale required for fossil parity of electrolytic hydrogen.

2. Proost, Joris. Renewables for industry and transport, based on largeand small-scale green hydrogen production. In: Proceedings of the International Conference on Innovative Applied Energy (IAPE’19), 2019, 978-1-912532-05-6.

3. Piret, Nicolas; Santoro, Ronny; Dogot, Loïck; Barthélemy, Bastien; Peyroux, Eugénie; Proost, Joris. Influence of glass composition on the kinetics of glass etching and frosting in concentrated HF solutions.

4. Thunis, Grégoire; de Radiguès de Chennevières, Quentin; Proost, Joris. Intensification of alkaline water electrolysis using 3‐D electrodes, forced electrolyte flow and pulsed voltage.

5. de Radiguès de Chennevières, Quentin; Dalne, Thomas; Proost, Joris. Process intensification of alkaline water electrolysis using forced electrolyte flow through 3D electrodes. In: Proceedings of the European Hydrogen Energy Conference (EHEC-2018), 2018, p. 21.

6. Proost, Joris; Chehade, Z.; Hilliard, S.; Lucchese, P.; Mansilla, C.. Critical assessment of running P2H demo-projects within the framework of the IEA/HIA.

7. Robinius, M.; Linssen, J.; Mansilla, C.; Dolci, F.; Dickinson, R.; Funez, C.; Grand-Clément, L.; Hillard, S.; Proost, Joris; Leaver, J.; Samsatli, S.; Olfa, T.; Valentin, S.; Weidener, E.; Lucchese, P.. Techno-economic Potentials and Market Trends for Power-to-Hydrogen and Hydrogen-to-X based on a Collaborative and International Review. In: Proceedings of the 22nd World Hydrogen Energy Conference (WHEC 2018), 2018, p. Abstract #80.

8. Delvaux, Adeline; Lumbeeck, Gunnzt; Idrissi, Hosni; Proost, Joris. Electrochemical hydrogenation of nickel thin film electrodes. In: Proceedings of the 4th International Symposium on Catalysis for Clean Energy and Sustainable Chemistry (CCESC), 2018, p. 8.

9. de Radiguès de Chennevières, Quentin; Proost, Joris. On the use of 3-D electrodes and pulsed voltage for the process intensification of alkaline water electrolysis. In: Proceedings of the 2018 International Symposium on Hydrogen Energy and Energy Technologies (HEET 2018), 2018, p. 23.

10. Lucchese, P.; Mansilla, C.; Dolci, F.; Dickinson, R.R.; Funez, C.; Grand-Clément, L.; Hilliard, S.; Proost, Joris; Robinius, M.; Salomon, M.; Samsatli, S.; Tliili, O.. Power-to-Hydrogen and Hydrogento- X : midterm appraisal of the IEA HIA Task 38 accomplishments.

Book Chapters

1. Proost, Joris. Mechanical and Electrostrictive Effects in Anodic Films. In: Encyclopedia of Interfacial Chemistry : Surface Science and Electrochemistry , Elsevier, 2017. 978-0-12-409547-2. doi:10.1016/B978-0-12-409547-2.13403-1.

2. Proost, Joris; Maex, Karen; Celis, Jean-Pierre. Current-induced mass transport in metallic films in the near-threshold regime. In: Progress in Transport Phenomena , Elsevier, 2003, p. 509-541.