CATALYST-RECOVERY EVIDENCE RECORD
Yenra | Updated September 17, 2026
Article: https://yenra.com/fuel-cell-research/

Purpose: read a research result using explicit mass-balance boundaries.
This is a literature-review worksheet, not a chemical-processing procedure. Use the same metal and mass unit in each yield calculation.

Paper / project / date / experimental stage:
Feedstock: new scrap, laboratory material or aged field material:
Original metal available across the defined system (g):
Metal reaching the recovery process after collection (g):
Recovered metal (g):
Total mass of recovered product (g):
Collection fraction = process-feed metal / original metal:
Process yield = recovered metal / process-feed metal:
Overall recovery = recovered metal / original metal:
Purity = recovered metal / total recovered-product mass:
Assay method, detection limits and uncertainty:
Replicates, scale, contaminants, waste streams and energy inputs:
Reuse evidence: specification, test conditions, performance and durability:
Project targets clearly separated from measured results:
Unresolved questions and next evidence needed:

Fictional example: 100 g original platinum, 80 g collected, 95% process yield gives 76 g recovered. Overall recovery is 76%. If recovered product totals 80 g, its platinum purity is 95%. Yield and purity have different denominators.

Primary references used in the article:
https://www.hydrogen.energy.gov/docs/hydrogenprogramlibraries/pdfs/review24/mnf-bil007_stuckey_2024_p.pdf
https://www.hydrogen.energy.gov/docs/hydrogenprogramlibraries/pdfs/progress-06/v_e_2_shore.pdf?sfvrsn=5643f260_1