Correction to: Communications Chemistry https://doi.org/10.1038/s42004-025-01530-1, published online 30 April 2025

In the version of this article initially published, the subscript “2” was missing from Eq. (1), which has been corrected to read “Mg5Bi3 + 1/2H2 ↔ Mg5Bi3H” in the HTML and PDF versions of the article.