Vertically Aligned BCN Nanotubes as Efficient Metal‐Free Electrocatalysts for the Oxygen Reduction Reaction: A Synergetic Effect by Co‐Doping with Boron and Nitrogen

A single-compound source of B, C, and N was used for the growth of vertically aligned BCN (VA-BCN) nanotubes (NTs). Owing to a synergetic effect of co-doping of C nanotubes (CNTs) with N and B, the VA-BCN NTs show significantly improved electrocatalytic activity (e.g., current density) for the oxygen reduction reaction compared to undoped VA-CNTs, CNTs doped with only B or N (VA-BCNT, VA-NCNT), and a commercial Pt/C electrocatalyst (see picture). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.