An Efficient Electrocatalyst by Electroless Cobalt–Nickel–Phosphorus Alloy Plating on Three-Dimensional Graphene for Hydrogen Evolution Reaction

Abstract

The development of earth-abundant, efficient, and stable electrocatalysts is very important for the hydrogen evolution reaction (HER) in an alkaline electrolyte. An efficient electrocatalyst was fabricated via the electroless plating of well-dispersed Co-Ni-P alloy particles on three-dimensional graphene using nickel foam as the template (Co-Ni-P/rGO/NF). Co-Ni-P/rGO/NF exhibited excellent HER activity with a low overpotential of 65 mV and a small Tafel slope of 63 mV dec −1 at a current density of 10 mA cm −2 . This catalyst also showed prominent electrochemical durability (over more than 10 h) in an alkaline electrolyte. Therefore, this study provides a facile design for non-noble-metal electrocatalysts, which can be used in future applications to replace Pt-based electrocatalysts.

A modified ‘skeleton/skin’ strategy for designing CoNiP nanosheets arrayed on graphene foam for on/off switching of NaBH4 hydrolysis

“…71-2336), respectively. 16,26,[35][36][37] The XRD results are consistent with HRTEM. As shown in Fig.…”

“…Transition metals have been reported as new low-cost earthabundant catalysts that can be further enhanced by doping with P or B, 16 with examples including Ni-P, 17 Co-P, 18 Fe-P, 19 Co 2 P 20 and Co-B. 21 Furthermore, introducing graphene can effectively obtain a higher catalyst surface area.…”

“…To prepare 3D graphene, nickel foam has been widely used due to its unique structure and low production cost. 16,26,27 Using nickel foam as a template solves the powder catalyst separation problem, and prevents easy combination and other shortcomings, while allowing convenient collection and recycling. Furthermore, the hydrogen production rate of NaBH 4 hydrolysis can be controlled by changing the contact area.…”

Bimetallic iron cobalt oxide nanoclusters embedded on three-dimensional flower-like iron cobalt oxide nanosheets for improved oxygen evolution reaction

“…To date, numerous approaches on non-noble metal-based SOCs have been used to compete with the high OER performance of noble metal-based catalysts, including regulating phase composition, shape, and intrinsic defects and metal doping. [30][31][32][33] For example, Basu et al 34 developed a 2D structure for cobalt iron oxide (CoFe 2 O 4 ) that was used in OER. The as-synthesised CoFe 2 O 4 only needed a B410 mV overpotential to reach a current density of 10 mA cm À2 in 1.0 M KOH.…”

An Iron-Group Metal Boride/Boron-Doped Vertically Oriented Graphene as Efficient Catalyst for Overall Water Splitting in a Wide pH Range

“…Recently, the transition metal compounds have emerged as a new class of cost-effective and preferable active electrocatalysts for HER and OER. [11][12][13][14][15][16] Among them, iron-group metal derivatives have deserved particular attention due to their natural abundance. 17,18 Iron-group metal borides (IMBs) exhibit excellent electrocatalytic activity owing to better electron transfer kinetics from boron to metal.…”