Cobalt–zinc nitride on nitrogen doped carbon black nanohybrids as a non-noble metal electrocatalyst for oxygen reduction reaction

Abstract

Bimetallic nitrides are now being considered as one of the emerging advanced functional materials due to their characteristic features and remarkable physicochemical properties. Herein, we report a new crystalline bimetallic nitride (CoZnN) that belongs to the cubic crystal phase, which was successfully synthesized through direct nitridation of metallic salts as precursors. CoZnN nanoparticles were then supported on nitrogen-doped XC-72 carbon black (N-CB), and this typical CoZnN/N-CB nanohybrid discovered can serve as an efficient non-noble metal electrocatalyst with a 4e reaction pathway for ORR, and demonstrated excellent electrocatalytic performance with high activity and stability.

VN Quantum Dots Anchored Uniformly onto Nitrogen-Doped Graphene as Efficient Electrocatalysts for Oxygen Reduction Reaction

“…The excellent activity of the VNQDs may be due to the presence of nitrogen atoms, which can lead to the shrinkage of d-band, thus increasing the electron density near the Fermi level of VN, and further improving the reduction rate of the adsorbed oxygen atoms. 53 Furthermore, it is suggested that the introduction of nitrogen atom may weaken the strong adsorption of vanadium toward ORR intermediates (such as OH, O and OOH). In addition, the nitrogen doped in graphene also negative charged the adjacent carbon atoms, which also bene¯t the ORR activity of the VNQD-NG catalyst.…”

Antiperovskites with Exceptional Functionalities

“…Its ORR onset potential (in 0.1 m KOH) was reported to be 0.84 V, yet its true chemical composition and the indium catalytic role remain debated. Similarly, nanohybrid Co 3 ZnN@N‐CB (carbon black) obtained via direct nitridation of metallic salts can serve as an efficient non‐noble bimetallic ORR electrocatalyst . The onset potentials for the nitride catalysts are ≈0.9 V, and the half‐wave potentials are ≈0.829 V, 30 mV less than that of commercial 20 wt% Pt/C.…”

Synthesis of Fe, Co Incorporated in P-Doped Porous Carbon Using a Metal-Organic Framework (MOF) Precursor as Stable Catalysts for Oxygen Reduction Reaction

“…However, due to its expensive cost, poor durability, and CO poisoning in the reaction, 1-5 the need to explore new efficient, durable, and cheap catalysts to substitute the Pt/C is urgent. In past decades, several alternatives have been developed, such as noble metal-based nanoparticles, 5,6 non-noble metal catalysts, 7,8 and metal-free materials. 9 Heteroatom-doped carbon materials are the representatives of the metal-free materials and the mechanism of the reduction of oxygen has been widely investigated.…”