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The chiral‐induced spin selectivity effect (CISS) is a breakthrough phenomenon that has revolutionized the field of electrocatalysis. We report the first study on the electron spin‐dependent electrocatalysis for the oxygen reduction reaction, ORR, using iron phthalocyanine, FePc, a well‐known molecular catalyst for this reaction. The FePc complex belongs to the non‐precious catalysts group, whose active site, FeN4, emulates catalytic centers of biocatalysts such as Cytochrome c. This study presents an experimental platform involving FePc self‐assembled to a gold electrode surface using chiral peptides (L and D enantiomers), i.e., chiro‐self‐assembled FePc systems (CSAFePc). The chiral peptides behave as spin filters axial ligands of the FePc. One of the main findings is that the peptides′ handedness and length in CSAFePc can optimize the kinetics and thermodynamic factors governing ORR. Moreover, the D‐enantiomer promotes the highest electrocatalytic activity of FePc for ORR, shifting the onset potential up to 1.01 V vs. RHE in an alkaline medium, a potential close to the reversible potential of the O2/H2O couple. Therefore, this work has exciting implications for developing highly efficient and bioinspired catalysts, considering that, in biological organisms, biocatalysts that promote O2 reduction to water comprise L‐enantiomers. [ABSTRACT FROM AUTHOR]

The article discusses a research study published in Angewandte Chemie International Edition that explores new methods to enhance the activity of iron phthalocyanine (FePc) in the oxygen reduction reaction (ORR) through electron transport phenomena in chiro-self-assembled FePc nanostructures. The study combines the principles of electrocatalysis and molecular electronics to increase the ORR performance, specifically by utilizing the chiral-induced spin selectivity effect. The findings of this study provide valuable insights for designing more efficient electrocatalytic devices. The article also briefly mentions other research articles on topics such as mass spectrometry, phosphorescent materials, single-atom catalysis, and photopatterning. [Extracted from the article]

The article titled "Electron Spin-Dependent Electrocatalysis for the Oxygen Reduction Reaction in a Chiro-Self-Assembled Iron Phthalocyanine Device" explores innovative methods to enhance the activity of iron phthalocyanine (FePc) in the oxygen reduction reaction (ORR). The authors, Rubén Oñate, Alexis Aspee, Ingrid Ponce, and others, combine the principles of electrocatalysis and molecular electronics to improve ORR performance by utilizing electron transport phenomena in chiro-self-assembled FePc nanostructures. This study provides valuable insights for designing efficient electrocatalytic devices. The article also briefly mentions other research topics such as droplet reactions and ion soft-landing, phosphorescent materials, single-atom catalysis, and photopatterning. [Extracted from the article]

With the purpose of obtaining inexpensive electrodes for the degradation of organic pesticides by the electro-Fenton reaction, the required H2O2 being obtained by the 2-electron reduction of dissolved O2, we have prepared glassy carbon electrodes coated with a mixture of graphite with Mo- and/or Co-modified zeolites. Three zeolites were used, Linde type A (ZA), Faujasite (ZY), and MFI (ZSM5), whose maximum possible cation exchange, directly given by the Al/Si ratio, and their hydrophilicity increases in the order ZSM5 < ZY < ZA. The zeolites were modified with Mo and/or Co by the wet impregnation method and characterized by different techniques. The outer surfaces of the three Mo-modified zeolites showed Mo-containing grains (in ZA) or needles (in ZY and ZSM5), which could be largely washed away with hot water. Electrodes were made by depositing on a disc of glassy carbon (GC) a mixture of graphite, zeolite, and a binder. Quite unexpectedly, the cyclic voltammograms (CVs) of the three Mo-modified zeolites showed at least five pairs of anodic-cathodic peaks, which we assume are due to the presence of the Mo7O246− isopolyoxomolybdate anion, proceeding from the impregnating solution, and anchored on the zeolites' surface. With a rotating ring-disc electrode, the highest efficiency for H2O2 production at − 0.2 VRHE, namely, 12.7%, was obtained with the GC/graphite-(CoMo-exchanged ZA) electrode, but this efficiency decreased with time. On the contrary, the three zeolites modified only with Mo were stable in 4-h electrolyses at − 0.2 VRHE and yielded the highest H2O2 concentrations, which we attribute to the Mo7O246− isopolyoxomolybdate anchored on the zeolites. The H2O2 yield was the same for the three Mo-modified zeolites, irrespective of their exchange capacity and hydrophobic/hydrophilic character.Glassy carbon electrodes coated with a mixture of graphite with Mo- and/or Co-modified zeolites have been prepared in order to obtain H2O2 by the 2-electron reduction of dissolved O2. The voltammograms of the Mo-modified zeolites showed five pairs of anodic-cathodic peaks, which we attribute to the presence of the Mo7O246− anion. [ABSTRACT FROM AUTHOR]