Start with 9%, not with catalyst chemistry. That is the share of annual U.S. electricity generation the Electric Power Research Institute estimates data centers could be consuming by 2030, against 4% of total electricity demand in 2023. Everything else here is an answer to that gap.
A group headed by Gang Wu, the Elvera and William R. Stuckenberg Professor in the McKelvey School of Engineering at Washington University in St. Louis, believes it has found a route to making low-temperature fuel cells better suited to that job. The findings appeared Aug. 6, 2026, in Nature Nanotechnology, produced with collaborators at Brookhaven National Laboratory, Lawrence Berkeley National Laboratory, Northeastern University and the University of Pittsburgh.
The argument is a simple one. “If a data center is able to supply its electricity itself by using a fuel cell, it would directly convert hydrogen and other fuels into the electricity, reducing the burden on the energy grid,” Wu said.
Durability is the figure to watch
Set the press-release adjectives aside and look instead at the test itself. After 150,000 severe voltage cycles, the material retained 85% of its performance. By the researchers’ estimate, that amounts to something like 25,000 hours of operation.
For this class of catalyst, voltage cycling is the abuse test, because cycling is what finishes them off. In service, platinum nanoparticles dissolve, migrate and grow larger, and performance slides away with them. Holding most of its output through 150,000 such cycles means a catalyst is making a claim about how it fails, not merely about how it looks on day one.
The awkward bargain platinum imposes
A fuel cell generates electricity by bringing hydrogen and oxygen together, throwing off water and heat in the process. Catalysts accelerate that reaction while trimming energy losses.
Few materials do the job as well as platinum. It is also a precious metal, which turns the whole field into an exercise in using as little of it as possible. Breaking bulk platinum down into nanoparticles sends the exposed surface area up sharply, and that is how loadings come down to typically less than one quarter of a milligram per square centimeter.
Small particles, though, are unstable particles. That is the trade-off that has shaped this work for years.
A more recent alternative to conventional platinum alloys has been platinum intermetallic catalysts, which promise better activity along with better stability. Producing them creates a bind of its own. Holding the nanoparticles small, evenly spread and sparing with platinum usually calls for annealing below 700°C, and those temperatures are frequently too low to complete the shift from a disordered atomic arrangement to a highly ordered one — the very ordering that maximizes activity and durability to begin with.
The answer lay in the container, not the metal
Rather than reworking the catalyst, Wu’s team turned to the support material. They constructed porous, hollow carbon spheres laced with orderly radial nanochannels, offering substantial pore space and surface area, with the size and volume of the pores kept under control.
The channels function as cages. Platinum cobalt intermetallic nanoparticles remain densely packed and evenly distributed, and the assembly can be taken far beyond the usual temperature ceiling without the particles clumping together.
“Our strategy is using this new carbon nanostructure to synthesize platinum cobalt intermetallic nanoparticles that can reduce precious metal content and enhance activity and stability,” Wu said. “Traditionally, there would be a tradeoff between size and stability, but with the ordered carbon nanochannel host, platinum cobalt nanoparticles can be confined and remain stable at very small particle size even at high temperatures.”
Just how far beyond? “Because of this special carbon nanostructured support, we could heat the platinum-cobalt catalyst to 1000°C, which is high enough to form a very ordered structure while still keeping the nanoparticles smaller than 5 nanometers and well spread out, even with industry-preferred high content of platinum in catalysts,” Wu said.
So: 1000°C versus a conventional 700°C, and particles that come out the other side still under 5 nanometers. The ordering that low-temperature annealing left unfinished gets completed.
A second role for the channels
An electrode is more than somewhere to park catalyst particles. Material has to travel through it.
“The open channel structure also helps the ion-containing material, such as an ionomer, spread evenly and makes it easier for protons, oxygen and water to move through the electrode,” Wu continued. “As a result, the platinum cobalt nanoparticles built into this support showed best-in-class performance and long-lasting durability. Eventually, 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.”
That closing sentence rewards a close reading. Wu is talking about catalyst problems still outstanding and industry partners not yet in hand. This is a laboratory result with a patent filed through the WashU Office of Technology Management — not a product with a ship date.
What still has to happen
Should the development work hold up, the same catalyst could find use in transportation as well as in electricity generation. Where data centers are concerned, the draw is producing power on site from hydrogen or other fuels instead of drawing still more from a grid that is already under strain.
Funding for the research came from Washington University in St. Louis.
The honest assessment of where this stands is this. On the combination of activity and durability the field has set as its benchmark, existing fuel cell catalysts still come up short, and a single paper reporting 85% retention after 150,000 cycles does not alter what is installed anywhere today. What it does unsettle is the assumption that an ordered atomic structure and small, well-distributed particles are an either-or choice. Wu’s group went to 1000°C and came away with both. The thing to watch is whether anyone can produce those carbon spheres beyond lab-bench quantities, since that is the point at which results like this tend to stall.