Recent progress and perspective of cobalt-based catalysts for water splitting: design and nanoarchitectonics

Simultaneous optimization of CoIr alloy nanoparticles and 2D graphitic-N doped carbon support in CoIr@CN by Ir doping for enhanced oxygen and hydrogen evolution reactions

“…49 Normally, the accepted OER catalytic mechanism in alkaline media follows the below electron reaction pathway. 2,48,50 * + OH − ⇋ *OH + e − *OH + OH − ⇋ *O + H 2 O(l) + e − *O + OH − ⇋ *OOH + e − *OOH + OH − ⇋ * + O 2 + H 2 O(l) + e − …”

“…Hydrogen, a zero-emission material with high energy density, is regarded as an attractive energy carrier to alleviate the serious fossil fuel energy crisis and environmental issues. 1,2 Water electrolysis, consisting of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), is an effective means to large-scale produce pure hydrogen. Normally, the overall efficiency of water splitting always suffers from high overpotential and sluggish kinetics of the OER and HER, particularly the anodic OER with a four proton-coupled electron transfer process.…”

Recent progress on the long‐term stability of hydrogen evolution reaction electrocatalysts

“…Many cobalt-based materials have recently been used in electrocatalytic HERs, mainly including metallic Co, cobalt-based compounds (sulfides, phosphides, selenides, fluoride, nitrides, oxides, hydroxides, alloys, etc.). 177 The loading of single-atom Co or Co NPs on carbon supports shows excellent HER activity and unremarkable advantages in terms of stability. For instance, single-atom cobalt dispersion in phosphorized carbon nitride (Co 1 /PCN) is only stable for 24 h in 1 M KOH.…”

Materials nanoarchitectonics in a two-dimensional world within a nanoscale distance from the liquid phase

“…The latter feature also makes it possible to apply to a wide range of applications. For example, the nanoarchitectonics concept can be applied to material fabrication, 18 structural control, 19 catalysts, 20 sensors, 21 devices, 22 energy-related 23 and environmental 24 applications, biochemical exploration, 25 and biomedical applications. 26 Considering that all materials are composed of atoms and molecules, this methodology of assembling materials from nano-units may be a method that can be applied to all materials.…”