Enhanced oxygen reduction reaction for Zn-air battery at defective carbon fibers derived from seaweed polysaccharide

Metal–Organic Framework-Derived Fe-Doped Ni3Se4/NiSe2 Heterostructure-Embedded Mesoporous Tubes for Boosting Oxygen Evolution Reaction

“…Due to their poor conductivity, which limits the charge-transfer efficiency, and the existing tiny pore’s inability to optimize the mass transfer, MOFs have typically been utilized as sacrificial templates to control the nanostructure . Most MOFs produce metal and/or metal-oxide nanoparticles upon high-temperature annealing, − whereas carbonizing in the presence of additional precursors (often S, Se, and P-sources) converts them into metal sulfides − or selenides , or phosphides, or a variety of heteroatom-doped catalysts . On the other hand, MOFs can be constructed with single- to multi-metal incorporation via conventional synthesis methods without any deviation in the coordination environment.…”

“…17 Most MOFs produce metal and/or metal-oxide nanoparticles upon high-temperature annealing, 18−20 whereas carbonizing in the presence of additional precursors (often S, Se, and P-sources) converts them into metal sulfides 21−23 or selenides 7,24 or phosphides, 17 or a variety of heteroatom-doped catalysts. 25 On the other hand, MOFs can be constructed with single-to multi-metal incorporation via conventional synthesis methods without any deviation in the coordination environment. In particular, Ni/ Fe and Co/Fe combinations were widely used in MOF construction and established simple fabrication methods to develop structurally stable MOFs for water electrolysis due to their significant terrestrial availability and low cost.…”

Biochar aerogel-based electrocatalyst towards efficient oxygen evolution in acidic media

“…As shown in Fig. 3e, the characteristic peaks of D band at 1341 cm −1 and G band at 1594 cm −1 for carbon materials were observed clearly (Zhao et al 2022). The intensity ratio of I D /I G can well show the defect degree of carbon, where the peak of D band reflects lattice defects of carbon atoms, and the peak of G band reflects complete sp 2 hybridization of carbon atoms (Ding et al 2021;Meng et al 2021).…”

Engineering Co and Ru dual-metal atoms on nitrogen-doped carbon as highly efficient bifunctional oxygen electrocatalysts

“…1,2 Nevertheless, the slower ORR kinetics of cathode in ZABs hinder the further development of this technology. 3,4 The cathode of ZABs requires high-efficiency bifunctional material, i.e., material that possesses the catalytic function of both ORR and OER to satisfy the charge and discharge function of ZABs. 5,6 At present, batteries containing noble metals, Pt-based and Ir/ Ru-based catalysts, possess excellent catalytic activity.…”