Correction to: Nature Catalysis https://doi.org/10.1038/s41929-019-0241-7, published online 4 March 2019.

In the version of this Article originally published, all labels for the orange, blue and red trends in Fig. 3b read ‘BiNCs’, but the orange labels should have read ‘BiNPs’, and the blue ‘BiBPs’. This has now been corrected.