Process for manufacturing silicon-based nanoparticles from metallurgical-grade silicon or refined metallurgical-grade silicon

摘要

A process for manufacturing silicon-based nanoparticles by electrochemical etching of a substrate, wherein the substrate is a metallurgical-grade or upgraded metallurgical-grade silicon, the substrate including an impurity content greater than 0.01%.

主权项

1. A process for manufacturing hydrogen via silicon-based nanopowders, comprising:
providing a substrate made of metallurgical-grade silicon or upgraded metallurgical-grade silicon having an impurity content greater than 10 ppm by weight, electrochemically etching said substrates to form silicon-based nanopowders having a hydrogen release energy lower than the hydrogen release energy of a silicon nanopowder obtained from electronic- or solar-grade silicon, and producing hydrogen via the silicon-based nanopowders.