Mo 0.42 C 0.58 Nanoparticles Embedded in Nitrogen‐Doped Carbon as Electrocatalyst towards Oxygen Reduction Reaction

Highly dispersible Mo 0.42 C 0.58 nanoparticles in nitrogen‐doped carbon is achieved via pyrolyzing one‐dimensional NH 4 Ni 2 Mo 2 O 8 (OH)H 2 O@polypyrrole nanocomposites. The formation of the Mo 0.42 C 0.58 is realized via the reaction between the NH 4 Ni 2 Mo 2 O 8 (OH)H 2 O nanorod as core and the carbonized polypyrrole at a high temperature. The Mo 0.42 C 0.58 @N‐doped carbon presents satisfied catalytic activity towards oxygen reduction reaction with the half‐wave potential of 0.828 V vs. RHE (reversible hydrogen electrode), comparable to that of the commercial Pt/C catalyst. Furthermore, the sample illustrates superior stability and methanol tolerance to Pt/C. The excellent catalytic activity of the Mo 0.42 C 0.58 @N‐doped carbon can be attributed to the existence of Mo 0.42 C 0.58 nanoparticles, the N doping in carbonized polypyrrole, and the well‐maintained one‐dimensional nanostructure.