Preparation of a bifunctional ultrathin nickel phosphide nanosheet electrocatalyst for full water splitting

Abstract

Developing the noble-metal-free robust and effective electrocatalyst with enhanced active sites for overall water splitting is of great significance yet challenging. Here we demonstrate a bifunctional ultrathin Ni2P nanosheet electroccatalyst...

A facile and simple microwave-assisted synthesis method for mesoporous ultrathin iron sulfide nanosheets as an efficient bifunctional electrocatalyst for overall water splitting

“…This is a normal process that has been reported in the literature. 19,31,60,67 The well-known RuO 2 is an established catalyst for OER and Pt/C for HER. The combination of RuO 2 as the anode and Pt as the cathode is expected to provide an excellent incorporated catalytic structure.…”

“…Therefore, Earth-abundant electrocatalysts are required to overcome the basic issues related to the state-of-the-art catalysts of Pt or Ir. [17][18][19][20][21][22] The wellknown examples of Earth-abundant electrocatalysts are metal chalcogenides, such as sulfides [23][24][25][26][27][28] and selenides, [29][30][31][32][33] which have been studied and broadly applied as HER electrocatalysts. [34][35][36] Among the existing metal dichalcogenides, iron sulfide has hardly ever shown higher HER performance without additional surface modification because it has a small number of active sites.…”

Synthesis of Ultrathin Porous Bimetallic Nickel–Cobalt Phosphide Nanosheets as an Excellent Bifunctional Electrocatalyst for Overall Water Splitting

“…Ni 2 P and CoP were prepared as reported in our previous work. [14,39] Detailed experimental work is illustrated in supporting information.…”

“…Because of this mass deviation in loaded mass, there is a deviation in over potential of overall water splitting to measure the overpotential of HER and OER. [14] The inside basis as the great bifunctional electrocatalytic kinetics of the NiCoP for primary reactions for overall water splitting with high activity as well as outstanding stability has a low thickness of NS 2.76 and 2.70 nm (Figure 3d,e), which produces additionally disclosed active sites, [59][60][61] surface roughness which is created because of etching, consequences of H 2 throughout the synthetic method of NiCoP NSs have enlarged the defects and supporting the mass to charge deportation in the catalytic procedure, [39] as well as porous morphology and large surface area (Figure 3g) further boosting the electrocatalytic kinetics and active sites that considerably improved the overall water splitting of NiCoP NS. [62][63][64][65]…”

“…[ 11,12 ] About this feature, a few 1D, 2D, and 3D morphologies have currently been studied. [ 10,13,14 ] In particular, 2D phosphide nanostructure is acknowledged significant exploration consideration because of its large surface area and high roughness to propose efficiently catalytic performance to electrochemical reactions. [ 15–17 ] As well, it also offered prosperous space and porosity and different channels for a quick charge to mass transfer avenues and simply chemical support of electrolyte.…”