A new catalyst breakthrough could help hydrogen fuel cells become a practical power source for the world’s most energy-hungry buildings: data centers. Researchers at Washington University in St. Louis have developed a carbon nanostructure that lets fuel cells use far less platinum while staying stable and efficient for tens of thousands of hours.
The timing is significant. As the artificial intelligence boom pushes data centers to consume a rapidly growing share of the world’s electricity, on-site clean power is emerging as one way to ease the strain. If this research scales through industry partnerships, it could help those facilities generate more of their own power directly from hydrogen.
The Breakthrough: A Platinum-Saving Catalyst Built to Last
Fuel cells generate electricity by combining hydrogen and oxygen in an electrochemical reaction. The only byproducts are water and heat, which makes the technology appealing for clean power. Catalysts speed up that reaction and largely determine how efficient and long-lasting a fuel cell is.
The challenge is that the best catalyst material, platinum, is a scarce and expensive precious metal. Researchers already stretch platinum further by breaking it into nanoparticles, using less than a quarter of a milligram per square centimeter. But those tiny particles are fragile. During operation they can dissolve, migrate, and clump together, causing performance to fade over time. That instability is one reason some teams are developing platinum-free catalysts entirely.
The team led by Professor Gang Wu of the McKelvey School of Engineering, working with scientists from Brookhaven National Laboratory, Lawrence Berkeley National Laboratory, Northeastern University, and the University of Pittsburgh, built a new kind of carbon support to hold the nanoparticles in place. The material is made of porous, hollow carbon spheres lined with orderly radial nanochannels.
That open structure solved a long-standing tradeoff. It let the researchers heat a platinum-cobalt catalyst to 1,000°C, hot enough to form a highly ordered atomic structure that maximizes both activity and durability, while still keeping the nanoparticles smaller than 5 nanometers and evenly distributed. The channels also gave protons, oxygen, and water easier pathways to move through the electrode.
In stress testing, the material retained 85% of its performance after 150,000 severe voltage cycles, which the researchers estimate corresponds to roughly 25,000 hours of operation. The findings were published in Nature Nanotechnology, and Wu has filed a patent on the technology through the university’s Office of Technology Management.
Why Data Centers Are Straining the Power Grid
The research arrives as data centers become one of the largest new draws on electricity. These facilities need enormous power not only to run their computing equipment but also to keep it cool, and the AI boom is accelerating the load.
The Electric Power Research Institute estimates that data centers could account for as much as 9% of annual U.S. electricity generation by 2030, up from about 4% in 2023. Globally, the International Energy Agency reports that data centers used roughly 415 terawatt-hours in 2024, about 1.5% of all electricity, and projects that figure will double to around 945 terawatt-hours by 2030.
Analyst firm Gartner estimates that global data center electricity consumption reached 565 terawatt-hours in 2026, up 26% from 2025, driven almost entirely by AI-optimized servers. This growth is already straining grids: interconnection queues for new U.S. grid connections have stretched to multi-year waits, pushing operators to look for power they can generate on-site.
Can Fuel Cells Actually Power a Data Center?
The short answer is yes, and it is already happening at scale. Fuel cells convert hydrogen or another fuel directly into electricity without combustion, and they can be installed in modular increments far faster than a multi-year grid upgrade.
Commercial deployments are underway. Bloom Energy reports more than 400 megawatts of fuel cell capacity already supplying data centers, part of a broader wave of hydrogen fuel cell innovations reaching the market. Microsoft has demonstrated a hydrogen fuel cell generator at a data center through a U.S. Department of Energy program. And Rystad Energy projects that fuel cell investment by data centers will grow tenfold to about $30 billion by 2030.
Fuel cells appeal to data center operators for several reasons:
- They can be deployed quickly in modular increments, unlike multi-year grid upgrades.
- One system can serve continuous primary load or act as backup power.
- They run independently of the grid, a trait that matters more as interconnection delays mount.
- They emit no local combustion pollution when fueled by hydrogen.
Hydrogen vs. Natural Gas: Two Different Fuel Cell Paths
Not all fuel cells are the same, and the distinction matters for how clean they really are. Most fuel cells deployed at data centers today run on natural gas using solid oxide technology, led by Bloom Energy. These systems are efficient and modular, but they still emit carbon dioxide unless paired with biogas.
The Washington University breakthrough targets a different path: low-temperature proton exchange membrane (PEM) fuel cells that run on hydrogen and emit only water. The new catalyst addresses one of that path’s biggest obstacles, the cost and durability limits of platinum.
| Attribute | Hydrogen PEM fuel cells | Natural gas SOFCs (e.g., Bloom Energy) |
|---|---|---|
| Fuel | Hydrogen | Natural gas or biogas |
| Main emission | Water vapor | Carbon dioxide (unless biogas) |
| Operating temperature | Low (roughly 80 to 100°C) | High (roughly 600 to 1,000°C) |
| Electrical efficiency | Around 50 to 60% | Around 54%, up to 90% with heat capture |
| Commercial status | Maturing, facing cost and platinum barriers | Deployed at scale (400+ MW) |
| Key challenge | Platinum cost and green hydrogen supply | Carbon emissions and scandium supply |
Recent progress on hydrogen fuel cell technology has focused on exactly this kind of cost reduction. By slashing the platinum needed while extending lifespan, the new catalyst brings hydrogen fuel cells closer to continuous commercial use in data centers.
What’s Holding Hydrogen Fuel Cells Back?
For all their promise, hydrogen fuel cells face real hurdles, and it would be misleading to ignore them.
The biggest hurdles fall into three categories:
- Fuel availability. Most hydrogen today is “gray” hydrogen made from natural gas, a process that produces emissions. Truly clean “green” hydrogen, made by splitting water with renewable electricity, remains expensive and scarce. Converting renewable power into hydrogen, storing it, and turning it back into electricity also involves efficiency losses at each step, which is why some analysts argue data centers are not yet a good use of green hydrogen.
- Infrastructure. Producing, transporting, and storing hydrogen at data center scale requires new pipelines, tanks, and safety systems that do not exist everywhere.
- Cost. Fuel cells remain pricier than grid power in many regions, though Rystad Energy expects system costs to fall by 20 to 25% by 2030 as manufacturing scales.
Frequently Asked Questions
What companies are making hydrogen fuel cells?
Several firms build fuel cells relevant to stationary power. Bloom Energy leads in solid oxide fuel cells running on natural gas, while Plug Power and Ballard Power Systems focus on proton exchange membrane hydrogen fuel cells. FuelCell Energy produces carbonate-based systems, and companies like ECL are developing hydrogen-powered data center projects specifically.
What does Elon Musk say about hydrogen?
Elon Musk has long criticized hydrogen fuel cells, arguing that the efficiency losses from producing and storing hydrogen make them inferior to batteries for most applications. His skepticism centers on the round-trip inefficiency of green hydrogen rather than the fuel cell technology itself.
Does FuelCell Energy have a future?
FuelCell Energy specializes in carbonate and molten carbonate fuel cells for stationary power generation. Its outlook depends on whether it can scale production and compete against Bloom Energy and maturing PEM alternatives, particularly as data center demand for on-site power grows.
Is it hazardous to live near a data center?
Data centers generally do not pose significant direct health risks to nearby residents. Community concerns more commonly involve noise from cooling fans and backup generators, water use, and the added strain on the local power grid, rather than air quality or safety hazards.
What Comes Next for Cleaner Data Centers
The Washington University catalyst is still a research-stage advance, and translating it into commercial fuel cells will take time and industry collaboration. But the direction is clear: reducing the platinum required while extending durability removes two of the biggest barriers holding hydrogen fuel cells back.
“Through further development and collaboration with industry partners, we’ll be able to solve the remaining catalyst problems and significantly advance fuel cell technologies for powering our future more efficiently and sustainably,” Wu said.
Hydrogen fuel cells are unlikely to be the only answer to data center power demand. They sit alongside on-site solar, batteries, and emerging small modular nuclear reactors as part of a broader toolkit. But for operators racing to power the AI boom without overloading the grid, every durability gain in clean, always-on generation moves the industry closer to a more sustainable data center.
