# Hybrid Chiral MoS2 Layers for Spin‐Polarized Charge Transport and Spin‐Dependent Electrocatalytic Applications

## TL;DR

A new chiral MoS2 material is developed that shows high spin polarization and improved electrocatalytic performance for oxygen evolution.

## Contribution

A hybrid chiral MoS2 design is introduced that combines high spin polarization with high conductivity for spin-dependent applications.

## Key findings

- Chiral MoS2 achieves a spin polarization of up to 75% through methylbenzylamine intercalation.
- Spin selectivity reduces H2O2 byproducts and enhances O2 formation during oxygen evolution.
- The synergy of high spin polarization and catalytic activity improves electrocatalytic performance.

## Abstract

The chiral‐induced spin selectivity effect enables the application of chiral organic materials for spintronics and spin‐dependent electrochemical applications. It is demonstrated on various chiral monolayers, in which their conversion efficiency is limited. On the other hand, relatively high spin polarization (SP) is observed on bulk chiral materials; however, their poor electronic conductivities limit their application. Here, the design of chiral MoS2 with a high SP and high conductivity is reported. Chirality is introduced to the MoS2 layers through the intercalation of methylbenzylamine molecules. This design approach activates multiple tunneling channels in the chiral layers, which results in an SP as high as 75%. Furthermore, the spin selectivity suppresses the production of H2O2 by‐product and promotes the formation of ground state O2 molecules during the oxygen evolution reaction. These potentially improve the catalytic activity of chiral MoS2. The synergistic effect is demonstrated as an interplay of the high SP and the high catalytic activity of the MoS2 layer on the performance of the chiral MoS2 for spin‐dependent electrocatalysis. This novel approach employed here paves way for the development of other novel chiral systems for spintronics and spin‐dependent electrochemical applications.

Chiral‐induced spin selectivity in the chiral MoS2 is reported. The spin selectivity suppresses the production of the H2O2 by‐product and promotes the formation of the ground state O2 molecules during the oxygen evolution reaction. The synergistic effect of the high spin‐polarization and the high catalytic activity of the MoS2 layer for spin‐dependent electrocatalysis is successfully demonstrated.