Sometimes science happens for funny reasons:

The results reported herein were discovered rather serendipitously when we inadvertently introduced ion-exchanged water instead of methylcyclohexane into a microwave-heated Pt/AC catalyst system during a MDOH experiment. Normally that would have not occurred had we not been required to wear facial masks owing to the Covid-19 virus, as the smell of this organic substrate is rather obvious from odorless water. It was only after about 20 min that we noticed the inadvertent misstep, yet the gas chromatograph detected hydrogen continuously through this time that could only be attributed to a process involving the flowing water.
https://pmc.ncbi.nlm.nih.gov/articles/PMC9041528/