There was a woman named Elizabeth Fulhame, the wife of a Scots physician. We don't know if she herself was Scots; in fact we know very little about her, not even her dates of birth and death, apparently. But in 1780, she began doing research on the process of combustion, and on methods for coating fabric with layers of precious metal. In 1794, she published a book on her work, An Essay On Combustion with a View to a New Art of Dying and Painting, wherein the Phlogistic and Antiphlogistic Hypotheses are Proved Erroneous. In it, she described a process where burning substances in contact with water acquired an oxygen atom from the water, releasing hydrogen, which then took on oxygen from the air and formed a new water molecule. This is apparently the first description of a catalytic process, more than 40 years before Berzelius coined the word.
Fulhame actually gained recognition in her own time; in 1810 she was elected an honorary member of the Philadelphia Chemical Society, and Count Rumford praised her work. But she seems to have fallen into obscurity for a long time after that; she certainly wasn't mentioned in my courses in chemistry and biochemistry. But I'm glad to have learned about her now. And I like the spirit of her key statement about her work:
Persuaded that we are not to be deterred from the investigation of truth by any authority, however great, and that every opinion must stand or fall by its own merits, I venture with diffidence to offer mine to the world, willing to relinquish it, as soon as a more rational appears.