New Catalyst Design Paves the Way for Affordable Green Hydrogen Production
The global pursuit of sustainable energy has positioned green hydrogen as a cornerstone of the future low-carbon economy. However, the economic viability of producing green hydrogen through water electrolysis hinges on overcoming the high cost of platinum-based catalysts, which are currently essential for driving the hydrogen evolution reaction (HER)—the process that generates hydrogen gas. Now, a research team has developed a high-performance catalyst using more abundant materials, offering a promising path to cost-effective green hydrogen.
Scientists have engineered a novel electrocatalyst, RuP₂-Ni₂P/NPC, using an innovative "embedded heterojunction" design strategy. This material exhibits superior HER activity and remarkable stability across a wide pH range, positioning it as a viable and cost-effective alternative to platinum-based catalysts.
"The key innovation of our work is the synergistic integration of heterojunction electronic modulation with a hollow confinement architecture," said Prof. Zhong, the corresponding author of the study. "By firmly embedding ultrafine RuP₂-Ni₂P heterojunction nanoparticles within the shell of hollow carbon spheres, we simultaneously optimized the intrinsic activity of the active sites and ensured their long-term stability. This is a new design paradigm, not just a new material."
The team's approach involved two key elements. First, constructing a RuP₂-Ni₂P heterojunction that induces interfacial electron redistribution from RuP₂ to Ni₂P, optimizing the d-band center and achieving a near-ideal hydrogen adsorption energy. Second, embedding these nanoparticles within hollow carbon spheres, which not only maximizes active site exposure and accessibility but also provides robust confinement that prevents nanoparticle aggregation, dissolution, or detachment during prolonged electrolysis.
The performance results are striking. In laboratory tests, the optimized catalyst required remarkably low overpotentials of only 3 mV in 1 M KOH and 17.3 mV in 0.5 M H₂SO₄ to achieve a current density of 10 mA cm⁻², representing the best-reported performance among RuP₂-based catalysts to date. Crucially, it demonstrated exceptional long-term stability, operating continuously for over 500 hours in alkaline media and over 300 hours in acidic media at a high current density of 100 mA cm⁻² without significant degradation. The catalyst also exhibited superior noble-metal mass activity, significantly outperforming commercial Pt/C.
The research is significant because it addresses two primary barriers to scaling up electrolyzer technology: the high cost of precious metals and the insufficient durability of existing non-platinum catalysts. By simultaneously enhancing both activity and stability while reducing precious metal loading, this work offers a practical pathway toward industrial-scale hydrogen production.
"The ultimate goal is to contribute to a sustainable energy future," the author added. "The next step for us is to scale up the synthesis of this catalyst and evaluate its performance in practical electrolyzer systems. The potential applications range from large-scale hydrogen production facilities for industrial use and energy storage to smaller, distributed electrolyzers for refueling stations."
This work not only provides a specific high-performance catalyst but also establishes a generalizable design strategy—synergistic interface and nanostructure engineering—for developing advanced electrocatalysts for various energy conversion technologies.
DOI Link:
https://doi.org/10.26599/NR.2026.94908616
About Nano Research
Nano Research is a peer-reviewed, open access, international and interdisciplinary research journal, sponsored by Tsinghua University and the Chinese Chemical Society, published by Tsinghua University Press on the platform SciOpen. It publishes original high-quality research and significant review articles on all aspects of nanoscience and nanotechnology, ranging from basic aspects of the science of nanoscale materials to practical applications of such materials. After 18 years of development, it has become one of the most influential academic journals in the nano field. Nano Research has published more than 1,000 papers every year from 2022, with its cumulative count surpassing 8,000 articles. In 2025 InCites Journal Citation Reports, its 2025 IF is 9.4 (8.3, 5 years), and it continues to be the Q1 area among the four subject classifications. Nano Research Award, established by Nano Research together with TUP and Springer Nature in 2013, and Nano Research Young Innovators (NR45) Awards, established by Nano Research in 2018, have become international academic awards with global influence.
