Pore size and electronic tuning in cerium-doped CoFe-LDH for the oxygen evolution reaction

Abstract

A series of cerium-doped CoFe-layered double hydroxides (LDH) materials were synthesized using a co-precipitation method, and they were utilized for oxygen evolution reaction. Among all the materials, CoFeCe2 having the...

Metal–organic framework-derived hierarchical porous N/Co-doped carbon-supported sponge-like Pd–SnO2 nanostructures for low-temperature CO oxidation

“…1–3 Limitless efforts to solve these issues lie in developing green energy technologies ( i.e. , fuel cells, 4 batteries, 5 and water splitting 6,7 ) and gas conversion reactions. 8–10 CO Oxid is formed during heterogeneous catalysis electrochemically, 11,12 or thermally, 13–16 but the latter is feasible for large-scale applications.…”

One-Pot Synthesis of CoFe-Nanomesh for Oxygen Evolution Reaction

“…In general, electrocatalysts with high electrical conductivity, large surface area, and high pore volume with optimized pore width can provide superior electrochemical performance for OER. 9 An electrocatalyst comprising these properties can provide plenty of active sites with enhanced charge-transfer properties. 10 In this regard, non-noble metalbased electrocatalysts (Co, Ni, Fe, etc.…”

“…The unsymmetrical electron occupancy in the t 2g orbitals of Co 2+ leads to a dynamic Jahn−Teller distortion, which results in the lengthening of the Co−O bonds and further facilitates the formation of O−O bonds during the OER process. 9 ZIF-67, a cobalt-based zeolitic imidazolate framework (ZIF), in which Co 2+ ions are linked with 2-methyl imidazole, is one such candidate for this purpose. 20 It has a very high surface area and uniform pore size distribution, having a pore width of ∼1.01 nm, making it a good candidate for catalysis.…”

“…This slow kinetics of anodic water oxidation reaction impedes its large-scale application. , Accordingly, ample strategies are required for developing cost-effective electrocatalysts that can improve the efficiency of water splitting significantly. In general, electrocatalysts with high electrical conductivity, large surface area, and high pore volume with optimized pore width can provide superior electrochemical performance for OER . An electrocatalyst comprising these properties can provide plenty of active sites with enhanced charge-transfer properties .…”

Pore Size-Regulated Vertically Aligned CoFe-LDH on a Carbon Support for the Oxygen Evolution Reaction

“…10,13 For practical applications of nanomaterials in catalysis or charge storage, pore size is an important parameter since narrow pore size can greatly enhance the number of active sites. 5,14 For instance, Gogotsi and co-workers reported that the presence of ultramicropores (<1 nm) in nanomaterials results in a massive increase in the charge storage capacity for supercapacitor application. 15,16 However, for electrocatalysis, it can be envisioned that a somewhat wider pore size will be ideal to avoid pore bursting due to product accumulation inside micropores.…”