Unraveling a volcanic relationship of Co/N/C@Pt_xCo catalysts toward oxygen electro-reduction

Abstract

The cathodic oxygen reduction reaction (ORR) has been continuously attracting worldwide interest due to the increasing popularity of proton exchange membrane (PEM) fuel cells. So far, various Pt-group metal (PGM)...

Decoupling the Synergy Between PGM and PGM‐Free Moieties toward Oxygen Reduction Reaction

“…By alloying Pt with transition metals such as Fe, Co, Ni, etc., the Pt usage can be remarkably decreased and the mass activity (MA) is increased due to the modulated electronic structure. [4][5][6][7] On the other hand, PF ORR catalysts, particularly the emerging single-atom catalysts (SACs), such as Fe/N/C, Co/N/C, Mn/N/C, etc. derived from (doped) zeolite imidazolate framework (ZIF), have demonstrated significantly improved initial performance, [8][9][10][11][12][13][14] although they are still not comparable to the state-of-the-art Pt/C catalyst (≈A/mg Pt versus ≈A/g PF in MA).…”