The decades-long search for an alternative to iridium, one of the rarest and most expensive metals on Earth, may finally be over, with a new discovery that could accelerate the push for affordable clean hydrogen technologies. Remarkably, researchers at Northwestern University behind the discovery say they found a viable substitute in just a single afternoon. By leveraging a powerful new nanomaterial data factory that researchers call a “megalibrary,” the team was able to screen millions of nanoparticles on a single chip at record speeds. Through a collaboration with the Toyota Research Institute (TRI), the team’s powerful new tool helped them...