Multi-strategy for constructing Z-scheme porous hollow double-shell Fe2O3@Ov-NiFe2O4 nanorods-arrays photocathode: Bias-free synthesis of H2O2, Zn-H2O2 cell and generation of NaZnPO4

Beyond metal–air battery, emerging aqueous metal–hydrogen peroxide batteries with improved performance

“…Rechargeable Zn–H 2 O 2 cell was reported by Feng and Zhang 84 . They reported an in situ self‐assembly template and coupling strategy to design a novel porous hollow double‐shell Fe 2 O 3 @Ov‐NiFe 2 O 4 with enriched oxygen vacancies and a strongly coupled interface (PDS–Fe 2 O 3 @Ov‐NiFe 2 O 4 ‐HR, [PDS, porous double shells]) for producing chemical value‐added product and constructing rechargeable Zn–H 2 O 2 batteries.…”

“…Rechargeable Zn-H 2 O 2 cell was reported by Feng and Zhang. 84 They reported an in situ self-assembly template and coupling strategy to design a novel porous hollow double-shell Fe 2 O 3 @Ov-NiFe 2 O 4 with enriched oxygen vacancies and a strongly coupled interface (PDS-Fe 2 O 3 @Ov-NiFe 2 O 4 -HR, [PDS, porous double shells]) for producing chemical value-added product and constructing rechargeable Zn-H 2 O 2 batteries. As-resultant Z-scheme PDS-Fe 2 O 3 @Ov-NiFe 2 O 4 -HR has fast interfacial carrier transport and low electrochemical resistance by improving light utilization efficiency, redox ability, and interfacial charge separation efficiency.…”

“…Zn-H 2 O 2 cells can also provide a peak power density of 8 mW cm −2 . 84 Interestingly, a catalyst-free Zn-H 2 O 2 flow cell was reported based on an all-vanadium redox flow battery with the respective redox couples of V(II)/V(III) and V(IV)/V (V) at the anode and cathode by the fuel (zinc) and the oxidant (H 2 O 2 ), respectively. This novel cell exhibits a high peak power density of 1192 mW cm −2 at 60°C, which is about five times as high as that of Zn-air (265 mW cm −2 ).…”

“…Furthermore, the combined configuration of PDS–Fe 2 O 3 @Ov‐NiFe 2 O 4 ‐HR‐Ti and Fe 2 O 3 ‐Ti enables the production of H 2 O 2 on both electrodes under an external bias‐free condition. Zn–H 2 O 2 cells can also provide a peak power density of 8 mW cm − 2 84 . Interestingly, a catalyst‐free Zn–H 2 O 2 flow cell was reported based on an all‐vanadium redox flow battery with the respective redox couples of V(II)/V(III) and V(IV)/V(V) at the anode and cathode by the fuel (zinc) and the oxidant (H 2 O 2 ), respectively.…”

Microdroplet assisted hollow ZnCdS@PDA nanocages’ synergistic confinement effect for promoting photocatalytic H2O2 production

“…Previous studies have reported that a confined microenvironment alters kinetics of the catalytic reaction by imposing confiner on the reactant molecules. 12–15 Especially, constructing nanoreactors by regulating the geometry of catalysts to promote catalytic reactions is a powerful strategy for optimizing the mass transport of reactive species 16,17 and improving e − /h + separation, thus promoting the conversion of O 2 to H 2 O 2 . Similarly, it has been extensively reported that micro- or nano liquids (nanosized liquids) exist with an abundance of gas–liquid interfaces, which can form a unique reaction system for efficient mass transfer and charge carrier separation.…”