Electronic metal-support interaction induces electron deficiency of iridium for promoted ampere-grade-current-density electrocatalytic hydrogen evolution

Key Points

• Exceptional hydrogen evolution performance is seen due to the electron deficiency of iridium.
• The iridium–cobalt phosphide heterostructure achieves performance at the ampere level.
• Construction of the catalyst includes an electronic metal-support interaction with N-doped carbon nanofibers.
• These findings highlight the importance of optimizing metal-support interactions for enhancing electrocatalytic processes.