National recommendations for health-based levels of per- and polyfluoroalkyl substances (PFAS) in water resources have been issued by the U.S. Environmental Protection Agency (EPA). Once final, these ...
However, using perfluoro sulfonic acid polymers containing sulfonic acid groups—a type of per- and polyfluoroalkyl substance (PFAS)—in fuel cells has raised concerns. PFAS can accumulate in the ...