Correction to: Nature Catalysis https://doi.org/10.1038/s41929-018-0062-0, published online 30 April 2018.

In the version of this Article originally published, in Table 3, the TOF (h–1) values for rows 1, 3, 5 and 7 were incorrect at 87,438, 56,695, 44,852 and 25,659, respectively; they should have read 95,765, 68,728, 50,012 and 28,787. The KIE values for rows 3 and 7 were also incorrect at 1.5 and 3.4, respectively; they should have read 1.4 and 3.3. All these errors have now been corrected.