Oxygen vacancy modulated Fe-doped Co₃O₄ hollow nanosheet arrays for efficient oxygen evolution reaction

Abstract

Herein, Fe-doped Co3O4 hollow nanosheet arrays with rich oxygen vacancies (Vo-Fe-Co3O4) are constructed through a facile stratedy. Benefiting from the compositional and structural superiorities, the Vo-Fe-Co3O4 exhibits a remarkable OER...

One-step preparation of NiCo2S4@NiCo-LDH nano-array structures for high-performance supercapacitor electrodes

“…3(d) to be 782.3 eV and 797.6 eV, respectively. 35–37 As can be seen from Fig. 3(e), the peaks of S 2p at 162.7 eV and 163.8 eV are attributed to S 2p 3/2 and S 2p 1/2 , respectively.…”

A review on defect modulated electrocatalysts for the oxygen evolution reaction

“…For instance, Tao et al engineered an advanced OER electrocatalyst by incorporating oxygen defects and iron doping into Co 3 O 4 . 12 Analysis of Nyquist plots revealed that the oxygen-deficient and Fe-doped Co 3 O 4 (V o -Fe-Co 3 O 4 ) exhibited the lowest charge-transfer resistance ( R ct ) of 2.3 Ω, significantly lower than Fe-doped Co 3 O 4 without oxygen defects (3.6 Ω) and undoped Co 3 O 4 (6.98 Ω), highlighting the role of oxygen defects in improving conductivity.…”

“…Up to now, NaBH 4 reducing treatment has been widely used to create defects in V O -Fe-Co 3 O 4 , V O -NiCo 2 O 4 , V O -Co 3 S 4 /CeO 2 , V O -NiFe LDH, V S -Co 3 S 4 /MoS 2 , and V S -Co 3 S 4 /rGO. 10,12,78–81…”

“…In recent years, strategies such as interface optimization, 10,11 heteroatom doping, 12,13 alloying, 14 and defect engineering 15–17 have been employed to enhance the OER performance of non-noble metal catalysts. These approaches aim to optimize the adsorption energies of intermediates and modify the surface atomic properties to boost activity and stability.…”

Layered double hydroxide-based electrode materials derived from metal–organic frameworks: synthesis and applications in supercapacitors

“…Further optimization of the electrochemical performance can be achieved by tuning the compositions, defects, and morphologies of the electrode materials. 77,78…”