rGO functionalized (Ni,Fe)-OH for an efficient trifunctional catalyst in low-cost hydrogen generation via urea decomposition as a proxy anodic reaction

Abstract

Green hydrogen derived from the water-electrolysis route is emerging as a game changer for achieving global carbon neutrality. Economically producing hydrogen through water electrolysis, however, requires the development of low-cost...

Synthesis of a multi-functionalized NiCo2O4 spinel heterostructure via the hydrothermal route for high-performance photo-electrocatalytic, anti-bacterial and eco-toxicity applications

“…[48][49][50] Lower Tafel slope of 50.9 mV dec À1 for the (Ni,Fe)-OH@rGO/NF electrode indicated a better OER performance due to the presence of more reactive sites on rGO, and interestingly the hydroxide, rGO and nickel foam greatly improved the catalytic activity because of the higher charge transport ability between the electrolyte and electrode interfaces. 47 In comparison, higher OER activity was observed for RBNCO, in agreement with the BET surface area, which ensured the enhancement of rapid electron transfer, followed by better electrocatalytic activity for the OER. The resistance of the catalysts was ascertained from their Nyquist plots obtained from the EIS (electrochemical impedance spectroscopy) analysis.…”

2D-black phosphorus/polyaniline hybrids for efficient supercapacitor and hydrogen evolution reaction applications

“…M À H ads + H 3 O + + e À / H 2 + H 2 O + M (12) M À H ads + M À H ads / H 2 + 2M (13) Similarly, the electrocatalytic HER activity of all three samples BP, PANI, and PANI/BP has been compared with a commercial 20% Pt/C catalyst in 0.5 M H 2 SO 4 acidic electrolyte at an LSV sweep rate of 5 mV s À1 . Fig.…”

“…In the past few decades, there has been a lot of research on the creation and application of non-precious electrocatalysts for HER and OER. [12][13][14] Phosphides, sulphides, carbides, nitrides, selenides, and alloys have all been investigated as promising materials for HER electrocatalysts. Similarly, the 2D composites of conducting polymers are also promising candidates for electrochemical water splitting applications due to the presence of both carbon and nitrogen source in their backbone, and the signicant number of lone pairs on the N atoms will show better activity towards the hybridized material and result in good electrocatalytic activity.…”

Two-dimensional FeCo2O4 nanosheets with oxygen vacancies enable boosted oxygen evolution

“…[1][2][3][4][5][6] However, both the breaking of the O-H bond and the formation of the O-O bond involve a multielectron transfer step, resulting in a slow kinetic process of the OER. [7][8][9] Hence, a high overpotential is demanded to force the energy-consuming procedure. 10 Although ruthenium dioxide (RuO 2 ) and iridium dioxide (IrO 2 ) are currently regarded as robust electrocatalysts to accelerate the OER process, their limited reserves and high price seriously restrict their largescale application.…”