Effect of the Electrolyte on the Oxygen Reduction Reaction with PCN‐224(Co)

ChemSusChem, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Abstract Electrocatalysis in metal‐organic frameworks is an interplay between the diffusion of charges, intrinsic catalytic rate, and mass‐transport reactants through pores. Here a systematic study carried out to investigate role electrolyte nature concentration on oxygen reduction reaction (ORR) with PCN‐224(Co) MOF aqueous electrolyte. It was found that ORR activity slightly influenced by ions solution, providing ionic strength high enough minimize resistivity during measurement. The be 1.3–1.5 times lower lithium acetate compared sodium acetate, while cesium 1.3–1.6 higher acetate. Moreover, there no dependency catalysis size anion, buffer concentration, or concentration. These findings suggest limited rate at active site rather than charge transport porous structure substrate Therefore, optimization this might achieved electronics cobalt site.

Language: Английский

The Role of Metal–Organic Framework Induced Confinement Effects on Molecular Electrocatalysts Relevant to the Energy Transition

ChemSusChem, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Metal organic frameworks (MOFs) are promising materials for (electro)catalysis as they can improve stability, reusability, and catalytic current densities of molecular catalysts, thereby combining the advantages homogeneous‐ heterogeneous catalysts. However, much is unknown about effects confinement a catalyst within an MOF on overall behavior. The performance series electrocatalysts confined in MOFs compared to that corresponding homogeneous catalysts evaluate what extend site affected by terms activity, selectivity. Together examples discuss depict happens when it incorporated into MOF, recommendations made how electrochemical activity way allows description such performance. It noted limiting factor reaction found 1) slow electron transport, 2) mass transport reactants products, or 3) low itself. Understanding changes mass‐ resulting mechanism essential be able bring systems practical applications.

Language: Английский

Efficient Hydrogen Peroxide Production: Enhancing Electron Transfer on PANI/ CdS Photocatalysts in Aqueous Solution

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 114979 - 114979

Published: Nov. 1, 2024

Language: Английский