Hydrogen could be one of the clean energy heroes of the future – but right now, the way we produce most of it is still part of the climate problem, not the solution. And this is where cutting‑edge research on catalyst materials, like the work happening at UCL with bp, could quietly change everything about how we make truly green hydrogen.
UCL – Understanding and optimising catalyst materials for sustainable hydrogen generation
Hydrogen already underpins a huge part of modern industry. It is a key ingredient in making chemicals such as ammonia for fertilisers and methanol for a wide range of products, and it also plays an important role in processes like steel refining. As the world looks for cleaner energy options, demand for hydrogen is expected to grow rapidly across power generation, transport applications (like hydrogen fuel cell vehicles), and the production of synthetic fuels.
But here’s the uncomfortable truth: most hydrogen produced today is far from climate‑friendly. It typically comes from fossil fuels, and in many cases the carbon dioxide released in the process is simply vented into the atmosphere instead of being captured. That means a supposedly "clean" energy carrier is often built on a very dirty foundation. Green hydrogen offers a radically different approach. Instead of using fossil fuels, it relies on surplus renewable electricity – from sources like wind or solar – to split water into hydrogen and oxygen, with no direct greenhouse gas emissions.
In practice, this water‑splitting process (electrolysis) depends on catalyst materials to speed up the reactions at the electrodes. At the moment, many of the most effective catalysts are made from scarce and expensive elements such as platinum and iridium oxide. These materials help the reactions happen, but they come with serious drawbacks: they are costly, limited in supply, and not used as efficiently as they could be. On top of that, current green hydrogen systems often operate with sub‑optimal efficiency, which pushes up the cost of hydrogen and slows down large‑scale adoption of the technology.
And this is the part most people miss: scientists still do not completely understand, at a fundamental level, how these catalyst materials actually work and why they perform the way they do. Without that deep understanding, it is very hard to design cheaper, more abundant, and more efficient alternatives. Should society accept reliance on rare, high‑cost materials for something as central as the future hydrogen economy – or should the goal be to replace them entirely?
The UCL research project, carried out in collaboration with bp, focuses precisely on this challenge. The team uses advanced computational experiments to study how hydrogen behaves on the surfaces of different catalyst materials. Instead of only running physical experiments in the lab, they build detailed simulations that let them zoom in on what happens at the atomic scale.
To do this, they employ powerful computational tools such as molecular dynamics and density functional theory (DFT). Molecular dynamics helps them track how atoms move and interact over time on the catalyst surface, while DFT provides a quantum‑level description of the electronic structure that governs chemical reactions. By combining these approaches, the researchers can test how tiny changes to the catalyst surface – such as changing its composition, structure, or defects – alter the way hydrogen adsorbs, moves, and reacts.
By systematically exploring these effects, the team can pinpoint which atomic‑scale features improve or hinder catalytic performance. That knowledge makes it possible to identify the key factors that control how active and efficient a material is during water electrolysis. In other words, instead of guessing which materials might work better, they can design and optimise catalysts in a more targeted and rational way.
The ultimate goal is to use these insights to develop improved catalyst materials for green hydrogen production. Enhancing the intrinsic activity of the catalyst – how effectively it promotes the desired reactions per unit of material – could mean using less of these expensive elements, or even replacing them with more abundant alternatives, while achieving higher efficiency. That would help reduce the cost of electrolyser systems, make green hydrogen more competitive, and accelerate its deployment at scale.
If you want to stay on top of how the broader hydrogen market is evolving – from technology breakthroughs to policy and investment trends – you can follow specialised news platforms like Hydrogen Central, which regularly share updates and analysis on developments across the hydrogen sector.
Here’s where it gets controversial: if new catalysts make green hydrogen cheap and scalable, should governments prioritise hydrogen over other clean options like direct electrification, or could that create new dependencies and risks? Do you think relying on advanced, highly engineered materials for catalysts is a smart path forward, or should the focus be on the simplest, most resource‑light technologies possible? Share your thoughts: is hydrogen being overhyped, or is it an essential pillar of a sustainable energy future?
