# A Stable Metal Chalcogenide Cluster-Based Framework Decorated with Transition Metal Complexes for an Efficient Electrocatalytic O2 Reduction Reaction

## TL;DR

A new non-Pt electrocatalyst, NCF-3-Mn, is developed for efficient oxygen reduction reactions with high stability and performance.

## Contribution

A novel metal chalcogenide cluster-based framework decorated with transition metal complexes is introduced for ORR electrocatalysis.

## Key findings

- NCF-3-Mn shows a high onset potential of 0.90 V for ORR.
- It exhibits a four-electron transfer pathway and better performance than T2-GaSbS.
- The material demonstrates long-term stability and methanol resistance.

## Abstract

Highly efficient and stable non-Pt-based electrocatalysts for oxygen reduction reactions (ORRs) are highly desirable in energy conversion and storage systems. Herein, we report a hydrothermally synthesized metal chalcogenide cluster-based framework (NCF-3-Mn), which is decorated with transition metal complexes ([Mn(TEPA)]2+, TEPA = tetraethylenepentamine), for an electrocatalytic O2 reduction reaction (ORR). Benefitting from the abundant Mn-S bonds and Mn-N-C structures in NCF-3-Mn, it was found that NCF-3-Mn displayed a high onset potential (0.90 V) and an efficient four-electron transfer reaction pathway, which are much better than those of its analogue framework (T2-GaSbS). Moreover, NCF-3-Mn also exhibited a considerable long-term stability and methanol resistance toward ORRs. This work will present new opportunities for exploring the utilization of chalcogenide frameworks as novel non-Pt electrocatalysts for ORRs.