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Catalyst supports can efficiently regulate the activity and stability of catalysts. However, the development of an efficient catalyst support is currently based on trial and error and is very time-consuming. Herein, we propose a rapid electrochemical screening method for heteroatom-doped carbon supports to enhance the oxygen reduction reaction (ORR) activity of PtNPs at the single nanoparticle (NP) level, without an inhomogeneous averaging contribution. When individual PtNPs collide at a functionalized carbon nanocone electrode with different heteroatom (X) doping, a catalytic structure of Pt–X–C is constructed, enabling the rapid screening of potential heteroatom-doped carbon supports. Our results demonstrate that the PtNPs on a nitrogen and phosphorus dual-doped carbon support exhibit excellent ORR performance. This work provides a simple and efficient method for screening highly efficient electrocatalyst supports at the single NP level.
Zhao et al. (Mon,) studied this question.