Editorial Standards

Separate hydrogen from platinum

Articles distinguish technologies that use platinum from hydrogen-system components that generally do not. This avoids turning “hydrogen technology” into one undifferentiated platinum demand category.

Primary sources

Fuel-cell and electrolyzer technical context is checked against U.S. Department of Energy hydrogen and fuel-cell resources; platinum supply and critical-material context against U.S. Geological Survey resources; and advertising/privacy requirements against official Google documentation.

No hydrogen operating instructions

The site does not provide pressures, fueling quantities, gas mixtures, purging sequences, venting instructions, detector placement, storage-vessel design, compressor settings, electrolyzer operating parameters or catalyst-preparation procedures.

Material-accounting discipline

Platinum loading, iridium loading, installed inventory, lifetime output, collection and recycling yield are treated as separate quantities so one metric does not hide another.