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Showing 1–7 of 7 results
Advanced filters: Author: Piotr Zelenay Clear advanced filters

  • Cheap, efficient oxygen reduction reaction catalysts are vital for the development of fuel cells and lithium-air batteries. Here, the authors report the scalable synthesis of a nitrogen-doped carbon nanotube/nanoparticle hybrid material that outperforms several platinum-based catalysts.

    • Hoon T. Chung
    • Jong H. Won
    • Piotr Zelenay
    ResearchOpen Access
    Nature Communications
    Volume: 4, P: 1-5

  • A new class of low-cost, non-precious-metal-polymer composite catalysts has been developed. These are not yet as good as platinum, but perform reproducibly in H2-O2 fuel cells at high voltages and with good stability.

    • Rajesh Bashyam
    • Piotr Zelenay
    Research
    Nature
    Volume: 443, P: 63-66

  • Direct air capture (DAC) of carbon dioxide is a critical technology for climate change mitigation, yet current materials lack efficiency and scalability. Here, the authors employ machine learning and high-throughput atomistic modeling to identify binding sites for the targeted design of functionalized amine sorbents, advancing the design of scalable, cost-effective DAC technologies.

    • Megan C. Davis
    • Wilton J. M. Kort-Kamp
    • Edward F. Holby
    ResearchOpen Access
    Communications Chemistry
    Volume: 9, P: 1-12

  • The implementation of precious metal-free catalysts for the oxygen reduction reaction in fuel cells requires techniques that enable the study of catalyst degradation during operation. Now, an electrochemical method to quantify the density of electrochemically active sites in precious metal-free fuel cell catalysts under in situ conditions is presented.

    • Rifael Z. Snitkoff-Sol
    • Ariel Friedman
    • Lior Elbaz
    Research
    Nature Catalysis
    Volume: 5, P: 163-170

  • Platinum-group-metal-free, non-iron catalysts are highly desirable for the oxygen reduction reaction at proton exchange membrane (PEM) fuel cell cathodes, as they avoid the detrimental Fenton reactions. Now, a cobalt and nitrogen co-doped carbon catalyst with atomically dispersed porphyrin-like CoN4C12 sites is reported with an improved activity and durability in PEM fuel cell conditions.

    • Xiaohong Xie
    • Cheng He
    • Yuyan Shao
    Research
    Nature Catalysis
    Volume: 3, P: 1044-1054

  • The development of platinum group metal-free catalysts for the oxygen reduction reaction is central to the implementation of fuel cell technology. Here the authors introduce and analyse a dedicated protocol for platinum group metal-free oxygen reduction reaction catalysts to assess their activity and durability under relevant working conditions.

    • Hanguang Zhang
    • Luigi Osmieri
    • Piotr Zelenay
    Research
    Nature Catalysis
    Volume: 5, P: 455-462

  • Platinum group metal-free electrocatalysts that utilize atomically dispersed, nitrogen-coordinated transition-metal sites in carbon are a promising replacement for platinum-based oxygen reduction reaction catalysts in fuel cells. This Perspective article offers a concise discussion on addressing remaining challenges related to activity–stability trade-offs by precisely controlling catalyst structures at multiple scales.

    • Gang Wu
    • Piotr Zelenay
    Reviews
    Nature Reviews Materials
    Volume: 9, P: 643-656