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Beyond van der Waals: Atomic Design and Operando Insights into Monolayer Transition Metal Nitride Electrocatalysts for Hydrogen Evolution Reaction

Project description

Atomic-scale catalysts for clean hydrogen

Producing clean hydrogen efficiently remains a major challenge for sustainable energy systems, largely because the atomic-level mechanisms are still not fully understood. Supported by the Marie Skłodowska-Curie Actions programme, the OPHERAN project will develop a new generation of ultra-thin tungsten-based transition metal nitride catalysts for clean hydrogen production. Using an innovative synthesis approach, researchers will create atomically thin TMN monolayers with precisely controlled compositions and defects, then observe hydrogen evolution reactions in real time at the atomic scale. The overall goal is for the project to provide the fundamental knowledge needed to design more efficient, durable and sustainable electrocatalysts for future clean energy technologies.

Objective

Two-dimensional (2D) materials are transforming the field of electrocatalysis by offering tunable physicochemical properties and favorable reaction kinetics. Within this rapidly expanding family, transition metal nitrides (TMNs) have recently emerged as an up-and-coming class of electrocatalysts due to their unique combination of metallic conductivity, thermochemical robustness, and rich d-electron chemistry, enabling efficient operation under both acidic and alkaline conditions. However, the atomic-level understanding of hydrogen evolution reaction (HER) kinetics on 2D TMNs remains largely unexplored due to a lack of reliable synthetic strategies capable of producing monolayers with well-defined crystallographic orientation, composition, and controlled defectiveness. This project aims to overcome this challenge by combining a bottom-up precision synthesis with operando atomistic characterization to establish fundamental insights into HER on 2D TMN monolayers. A confined vapor–liquid–solid (cVLS) approach will be employed to synthesize W-based 2D TMNs (WN, W2N₃, W₅N₆) with controlled stoichiometries and engineered defects. The HER kinetics will be directly probed under operando conditions using electrochemical scanning tunneling microscopy (EC-STM), allowing real-time visualization of hydrogen adsorption, defect-mediated activity, surface reconstructions, and dynamic processes such as hydrogen spillover and bubble formation at the sub-nanometer scale. By establishing a synthesis–structure–reactivity correlation, this project will decisively advance beyond the current state of the art, providing the atomic-level foundation to design non-van der Waals 2D electrocatalysts for high-performance energy conversion applications.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2025-PF

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Coordinator

UNIVERSITA DEGLI STUDI DI PADOVA
Net EU contribution
€ 209 483,28
Address
VIA 8 FEBBRAIO 2
35122 Padova
Italy
Region
Nord-Est Veneto Padova
Activity type
Higher or Secondary Education Establishments
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Total cost
No data

Partners (1)