Cobalt/molybdenum carbide@N-doped carbon as a bifunctional electrocatalyst for hydrogen and oxygen evolution reactions

Abstract

A synergetic architecture composed of nitrogen-doped carbon encapsulating cobalt and molybdenum carbide nanoparticles (CoxMoy@NC) presents excellent performance towards both HER and OER catalysis in alkaline medium.

Nano‐Micro‐Structured Nickel‐Cobalt Hydroxide/Ni2P2O7 Assembly on Nickel Foam: An Outstanding Electrocatalyst for Alkaline Oxygen Evolution Reaction

“…In the past decades, the electrocatalytic OER has been extensively studies based on many oxides, and the most effective and precious state‐of‐art oxides such as where IrO 2 and RuO 2 . However, applicative limitations arise from certain intrinsic characteristics of these catalysts, such as scarcity, poor durability, and high cost . Therefore, it is essential to design and develop earth‐abundant and cost‐effective OER catalysts for water splitting and evaluate their feasibility for the industrialization.…”

N‐doped Carbon‐coated Metal Sulfides/Phosphides Derived from Protic Salts for Oxygen Evolution Reaction

“…The porous structure of the NC shells can enable great mass and charge transfer for long‐term operation, particularly in the complicated gas evolution condition. In summary, the as‐prepared Ni−MoS 2 /NC is a low‐cost and highly efficient OER catalyst, which is superior to most molybdenum‐based and other Ni‐related OER electrocatalysts (Figure F and Table S1) …”

“…In summary, the asprepared NiÀ MoS 2 /NC is a low-cost and highly efficient OER catalyst, which is superior to most molybdenum-based and other Ni-related OER electrocatalysts ( Figure 4F and Table S1). [45][46][47][48][49][50][51] In summary, an efficient, general, and simple strategy for synthesis of NC-coated TMSs or TMPs has been explored based on protic salt-assisted pyrolysis. By using p-phenylenediamine bisulfate or p-phenylenediamine biphosphate as the precursors, many TMSs (such as Mo 3 S 4 /NC, Ni 3 S 2 /NC, Co 9 S 8 /NC, FeS/NC, and Cr 7 S 8 /NC) and TMPs (such as MoP/NC, Cu 3 P/NC, Ni 12 P 5 /NC, WP/ NC, and FeP/NC)-based materials were successfully prepared with good crystalline structures.…”

An Intriguing Pea‐Like Nanostructure of Cobalt Phosphide on Molybdenum Carbide Incorporated Nitrogen‐Doped Carbon Nanosheets for Efficient Electrochemical Water Splitting

“…The lower overpotential, smaller Ta fel slope,a nd highere xchange current density of CoP-Mo 2 C@NC, relative to Co-Mo 2 C@NC, originate from the interaction between Co and P, providing suitable sites to improve the HER performance, and thus, support the importance of phosphide material as ab etter HER electrocatalyst. It is important to note that the obtained catalytic performance from CoP-Mo 2 C@NC/ CC is higher in comparison with variousr eported systems of Mo 2 Ca nd its composites, [41][42][43][44] CoP, [45][46][47] and NiCoP, [48][49][50] which requires trong synergy of the nanocomponents, that is, CoP and Mo 2 Ci nt he synthesized material;t hus leading to one of the best HER results obtained from non-precious-metal-based electrocatalysts in an alkaline medium (Table S3 in the Supporting Information). [39] The improved HER performance in the carbide-phosphide material was furthera uthenticated by meanso fe lectrochemical impedance spectroscopy (EIS)a tÀ0.19 Vv ersus ar eversible hydrogen electrode (RHE).…”

“…The nanohybrid material possesses an overpotential as low as 265 mV at ac urrent density of 10 mA cm À2 ,w hich is far superior to those of Mo-HZIF (401 mV), Co-Mo 2 C@NC (303 mV), and commercial RuO 2 (294 mV). [29,41,42,46,47,[51][52][53][54] Moreover,a sadurable OER catalyst, the material exhibits good cyclic stability after 1000 CV cycles and effective long-term durability,w ith 90 %a ctivity retention in an alkalines olution (Figure4f). EIS plots furtherc orroborate easier charget ransfer at the catalyst surface, since as maller charge-transfer resistance (R ct )w as observed for CoP-Mo 2 C@NC (1.53 W), as opposed to that of Co-Mo 2 C( Figure S11i nt he Supporting Information).…”