South Korea’s KIER Triples Ammonia-to-Hydrogen Efficiency with Breakthrough Ruthenium Catalyst

South Korea just stepped up its game in the global hydrogen race, and it’s all thanks to a major breakthrough by the Korea Institute of Energy Research (KIER). On July 9, 2025, KIER unveiled a game-changing advance in ammonia decomposition technology that could completely shift how we think about hydrogen production. Leading the charge? None other than Dr. Kee Young Koo and his powerhouse team.

A Big Win for Ruthenium Catalysts

This is one of those innovations that could quietly change everything. KIER’s research team has figured out a way to make ruthenium-based catalysts way more efficient—like, three times more. Traditionally, ruthenium has been great at breaking down ammonia to get hydrogen, but it’s been held back by its high cost and tricky production. KIER turned that problem on its head.

Using a smart twist on the polyol process, where they swapped in butylene glycol for expensive stabilizers, the team created super-uniform 2.5nm ruthenium nanoparticles. No fancy (or pricey) capping agents needed. Even better, the new catalyst performs between 500°C and 600°C—that’s over 100°C lower than what we’re used to. What that means for the rest of us? More green hydrogen, way more efficiently, and with less energy needed to do it.

Why This Breakthrough Matters

Let’s be real—cost and scalability have always been the elephants in the room when it comes to turning clean ammonia into hydrogen. But Dr. Koo’s team tackled both. By boosting the number of active B5 sites—essentially the magic spots where hydrogen gets formed—they slashed the process’s activation energy by 20%. The result? More than triple the hydrogen yield compared to old-school tech.

And the timing couldn’t be better. With global industries scrambling to cut emissions, having a low-carbon, efficient way to store and ship hydrogen is a massive win for sectors like shipping, heavy vehicles, and stationary energy systems.

South Korea’s Hydrogen Strategy Gets a Boost

This isn’t just a cool lab experiment—it could be part of South Korea’s broader play to dominate in hydrogen infrastructure. The country’s already all-in on hydrogen, with strong government support and a geographic edge. Its rugged terrain and long coastline make ammonia-based transport systems a natural fit. Now, with a practical ammonia decomposition catalyst in its back pocket, South Korea could be looking at a real competitive edge—especially in the global clean fuel export market.

And KIER’s not just any research lab. As a government-backed institute, it plays a pivotal role in setting the country’s energy agenda. Thanks to this breakthrough under Dr. Koo’s watch, they may have just turned one of the biggest cost challenges into an opportunity for scale and leadership.

More Than Just Hydrogen: What It Opens Up

• Cuts down our dependence on fossil fuels in hydrogen production
• Kicks open doors for hydrogen fuel cells and more reliable energy storage
• Paves the way for homegrown ammonia cracking systems
• Delivers lower lifecycle CO₂ than traditional electrolysis methods

But this isn’t a silver bullet just yet. Ruthenium’s still a rare and pricey resource, and that raises questions about how big we can really go. For this thing to scale up, we’re going to need smart solutions—like recycling ruthenium or swapping it out for something more abundant. We’ll also need to see how this catalyst performs when it’s converted into pellet-type forms for actual industrial use.

Where We’re Headed

The research, which just landed the cover slot in the journal Small, is now moving into the next gear: figuring out how to mass-produce it and plug it into real-world systems. With backing from the Ministry of Science and ICT and the National Research Council of Science & Technology, KIER isn’t wasting any time aiming for commercialization—in South Korea and beyond.

If this catalyst proves it can scale, we’re looking at a potential game-changer for zero-emission technology—speeding up timelines and dropping costs across the board. And as more countries hunt for compact, clean, and efficient ways to handle hydrogen, this South Korean innovation might be the breakthrough that helps ammonia-to-hydrogen finally hit the big leagues.

This isn’t just another lab success—it’s a real, strategic leap toward a global hydrogen economy that works for everyone.