One-Step Electrodeposition of Co/CoP Film on Ni Foam for Efficient Hydrogen Evolution in Alkaline Solution

Abstract

The development of high-efficiency catalysts for hydrogen evolution via water splitting has been an effective strategy to solve the energy environmental problems and energy crisis. The abundant-reserving transition metals and their phosphides are becoming attractive Pt alternatives for hydrogen evolution reaction (HER). Herein, a crystalline/amorphous Co/CoP film was facilely prepared on nickel foam (NF) by a one-step electrodeposition technique at room temperature, named Co/CoP-NF. The as-prepared Co/CoP-NF electrocatalyst exhibits excellent electrocatalytic activity for HER, on par with Pt/C, showing a low overpotential of 35 mV at a current density of 10 mA·cm and small Tafel slope of 71 mV·dec in 1.0 M NaOH solution. More importantly, the Co/CoP-NF catalyst presents good long-term durability at an overpotential of 60 mV. Moreover, the influence of the electrodeposition parameters on the catalytic performance of the catalyst was discussed. This study offers an effective strategy to develop a non-noble-metal HER catalyst for industrial production of hydrogen.

Synergistic effect of Co–Ni co-bridging with MoS2 nanosheets for enhanced electrocatalytic hydrogen evolution reactions

“…32,33 In addition, the electrocatalytic HER activity and stability of MoS 2 -based composites in acidic media also present a challenge in order to meet the higher durability and stability requirements of catalysts when they are exposed to electrolysis equipment in acidic environments. 34,35 Herein, the overall MoS 2 based composite is dened as a Co-Ni associated Co-Ni-MoS 2 hybrid. The as-developed nanocomposite material has shown excellent HER performance with a durable nature in acidic conditions.…”

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

“…Thus, the C adjacent to dopant N was the active site for HER. Similarly, Bai et al synthesized a hybrid of crystalline Co and amorphous CoP on NF (Co–CoP/NF) . This hybrid exhibited η 10 = 35 mV with ζ = 71 mV dec −1 in basic solution.…”

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

“…Transition metal sulfide (TMSs) and transition metal phosphides (TMPs) have been extensively investigated as low cost and highly active electrochemical catalysts. [13][14][15][16][17][18] Generally, multi-metallic materials are always superior to their monometallic counterparts because of the accelerated electron transfer between different elements and modified electronic structures, which would lower the kinetic energy barriers of the electrochemical processes. [19,20] Inspired by this, constructing transition metal (Co, Ni, Fe)-doped or multi-metallic sulfides or phosphides is of great significance to further enhance the electrochemical activity.…”