Nickel-Enhanced Nitrogen Nanofoam Serpentinization

<p>This preprint presents the development and laboratory validation of a <strong>Nickel-Enhanced Nitrogen Nanofoam (Ni–N₂ Nanofoam)</strong> system for dual geothermal energy recovery and catalytic subsurface hydrogen production. The material integrates nickel nanoparticles, aluminum oxide, and silica within a nitrogen matrix to simultaneously achieve <strong>fracture stabilization, enhanced thermal conductivity, and accelerated serpentinization reactions</strong> in ultramafic-hosted reservoirs. Experimental results demonstrate a six-fold increase in hydrogen yield, a fifty-fold improvement in thermal conductivity compared to conventional fluids, and over 90% fracture stability retention under geothermal conditions. The study establishes a new benchmark for <strong>integrated clean energy systems</strong>, uniting geothermal baseload generation with geological hydrogen production in a single engineered platform.</p>