A Janus Nickel Cobalt Phosphide Catalyst for High‐Efficiency Neutral‐pH Water Splitting

Abstract

Transition-metal phosphides have stimulated great interest as catalysts to drive the hydrogen evolution reaction (HER), but their use as bifunctional catalytic electrodes that enable efficient neutral-pH water splitting has rarely been achieved. Herein, we report the synthesis of ternary Ni 0.1 Co 0.9 P porous nanosheets onto conductive carbon fiber paper that can efficiently and robustly catalyze both the HER and water oxidation in 1m phosphate buffer (PBS;p H7)e lectrolyte under ambient conditions.Awater electrolysis cell comprising the Ni 0.1 Co 0.9 Pelectrodes demonstrates remarkable activity and stability for the electrochemical splitting of neutral-pH water. We attribute this performance to the new ternary Ni 0.1 Co 0.9 P structure with porous surfaces and favorable electronic states resulting from the synergistic interplay between nickel and cobalt. Ternary metal phosphides hold promise as efficient and low-cost catalysts for neutral-pH water splitting devices.

Multifunctional Transition Metal‐Based Phosphides in Energy‐Related Electrocatalysis

“…b) Polarization curves for overall water splitting consisting of Ni 0.1 Co 0.9 P//Ni 0.1 Co 0.9 P and commercial Pt/C//Ir/C catalysts in 1 m phosphate buffer solution. c) Crystal structure of Ni 0.1 Co 0.9 P. Reproduced with permission . Copyright 2018, John Wiley and Sons.…”

Boosting the electrocatalytic performance of NiFe layered double hydroxides for the oxygen evolution reaction by exposing the highly active edge plane (012)

“…[1][2][3][4][5][6][7][8] However, the sluggish kinetic process of OER results in a high overpotential to deliver a desired current density because of its multi-step electron transfer process. [9][10][11][12][13][14] Precious-metal oxides such as IrO 2 and RuO 2 are efficient OER electrocatalysts, but their low abundance and high cost prohibit large-scale applications. [15][16][17] Therefore, the exploration of low-cost electrocatalysts with high OER electrocatalytic activity is highly pursued.…”

Cobalt Nickel Nitrogen Array as a Easily Eecoverable, Effective Catalyst for Liquid‐Phase Catalytic Reaction with Remarkable Recycled Stability

“…Typically, Wu et al. have attributed the good performance of NiCoP structure to favorable electronic states resulting from the synergistic interplay between nickel and cobalt . Zheng et al have revealed that the adsorption energies of key species can be modulated due to the synergistic effect between Co and Cu in CoCuN catalysts .…”