Coordination regulated pyrolysis synthesis of ultrafine FeNi/(FeNi)S nanoclusters/nitrogen, sulfur-codoped graphitic carbon nanosheets as efficient bifunctional oxygen electrocatalysts.

Design of advanced carbon nanomaterials with high-efficiency oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities is still imperative yet challenging for searching green and renewable energies. Herein, we synthesized ultrafine FeNi/(FeNi)S nanoclusters encapsulated in nitrogen, sulfur-codoped graphitic carbon nanosheets (FeNi/(FeNi)S/N,S-CNS) by coordination regulated pyrolyzing the mixture of the metal precursors, dithizone and g-CN at 800 °C. The as-prepared FeNi/(FeNi)S/N,S-CNS exhibited distinct electrocatalytic activity and stability for the ORR with positive onset (E) and half-wave (E) potentials (E = 0.

CoFe alloy embedded in N-doped carbon nanotubes derived from triamterene as a highly efficient and durable electrocatalyst beyond commercial Pt/C for oxygen reduction.

For development of green and sustainable energy, it is of importance to search highly efficient and low-cost electrocatalysts of oxygen reduction reaction (ORR) in energy conversion devices. Herein, CoFe alloyed nanocrystals embedded in N-doped bamboo-like carbon nanotubes (CoFe@NCNTs) were facilely synthetized by one-step co-pyrolysis with the mixture of triamterene, metal chlorides and graphitic carbon nitride (g-CN). The resultant CoFe@NCNTs exhibited excellent ORR activity with the positive shifts in the onset potential (E = 0.