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H2U

Re-engineering electrolyzers from the inside out.
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California, United States
11-50 employees

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Company Description

H2U, now operating as California Catalysts (Calicat), is a Los Angelesbased advanced materials company focused on re-engineering electrolyzers from the inside out to accelerate cost-effective green hydrogen. Building on technology licensed from Caltechs JCAP program, the company combines an AI-driven catalyst discovery engine with high-throughput experimentation to predict, synthesize, and validate non-iridium oxygen evolution reaction (OER) catalysts for PEM and AEM water electrolyzers. Calicats workflow begins with proprietary models that forecast material properties, progresses through rapid screening to correlate predictions with empirical performance, and culminates in in-house synthesis and full-stack testing; the resulting data continuously feeds back to improve the AI models, creating a compounding innovation loop. Translating breakthrough materials into practical products, Calicat offers advanced electrolyzer components that address critical industry constraints: the Defender PTL targets gas-in-gas recombination and durability challenges, while the Amplifier CCM leverages highly active, iridium-free catalyst layers to cut resistance and reduce dependence on scarce platinum group metals. Their holistic focus on LCOH (levelized cost of hydrogen) considers not just cell efficiency and capex but the broader operational levers that ultimately determine hydrogen cost at scale. Recognized by leading energy and industrial stakeholders and featured in sector press, the company has announced milestones such as breaking the 2V barrier for durable zero-iridium PEM OER catalystsan achievement that signals a tangible path to lower-cost electrolysis. Calicats customer and partner ecosystem includes names like De Nora, SoCalGas, and Tokyo Gas, with a joint development agreement aimed at addressing rare PGM supply constraints. Supported by venture funding, including a recent $3M Series A-2 bringing total raised to $18M, Calicat also provides an industry-leading LCOH calculator to help OEMs, developers, and operators model cost scenarios. With the worlds largest electrocatalyst activity database and a tight integration of AI, materials science, and product engineering, Calicat is positioned to enable the next generation of efficient, scalable, and sustainable hydrogen production.

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