Defect engineering on three-dimensionally ordered macroporous phosphorus doped Co3O4–δ microspheres as an efficient bifunctional electrocatalyst for Zn-air batteries

Single‐Atom Tailored Hierarchical Transition Metal Oxide Nanocages for Efficient Lithium Storage

“…[ 18 ] The Fourier transform of EXAFS (FT‐EXAFS) spectra shows one major peak at ≈1.3 Å attributed to the Nb‐O scattering feature (Figure 1f), which is also closer to the Co 3+ O bond configuration in Co 3 O 4 lattice. [ 19 ] Thereby, our results reveal that the Nb atom is possibly introduced into the Co 3+ lattice site of Co 3 O 4 crystal. To further identify the atomic conditions of Nb, wavelet transform (WT) analysis was conducted for its ability to distinguish the backscattering atoms in 3DH‐Co 3 O 4 @Nb (Figure 1g) and Nb foil (Figure 1h).…”

Deciphering the defectmicro‐environmentof graphene for highly efficient Li–S redox reactions

“…[36][37][38] Thirdly, considerable research efforts have been put on defect engineering, such as O-, Sor Se-deficient metal chalcogenides, paving a way to to expediting the LiPS conversion reaction. 33,[39][40][41][42][43][44] Among them, defect engineering exhibits great advantages in attaining practical Li-S batteries. Recently, we found that defect-rich carbon black with broken π conjugation to activate carbon π electrons can enable the LiPS reaction kinetics and strengthened the shuttle effect alleviation.…”

“…Attributing to the merits of superior anchoring effects of metal oxides and superb electronic conducting of metal nitrides, the twinborn heterostructures have often been reported to achieve propelled LiPS immobilization–diffusion–conversion procedure for promoted redox kinetics 36–38 . Thirdly, considerable research efforts have been put on defect engineering, such as O‐, S‐ or Se‐deficient metal chalcogenides, paving a way to to expediting the LiPS conversion reaction 33,39–44 . Among them, defect engineering exhibits great advantages in attaining practical Li–S batteries.…”

Vacancy-engineered CeO2/Co heterostructure anchored on the nitrogen-doped porous carbon nanosheet arrays vertically grown on carbon cloth as an integrated cathode for the oxygen reduction reaction of rechargeable Zn–air battery

“…Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the key processes in the energy storage and transfer systems highly related to the oxygen reactions including fuel cells, metal-air rechargeable batteries and water electrolyzers. [1][2][3][4][5][6] However, the sluggish nature of ORR and OER in kinetics becomes one of the bottleneck problems to develop these systems. [7][8][9] Therefore, catalysts with high activity and good stability are required to accelerate the oxygen reaction for the applicable energy supply.…”