Affiliation:
1. Beijing Key Laboratory of Energy Conversion and Storage Materials Institution, College of Chemistry Beijing Normal University Beijing 100875 China
2. Center for Advanced Materials Research & College of Arts and Sciences Experiment and Practice Innovation Education Center Beijing Normal University Zhuhai 519087 China
Abstract
AbstractIntegrating single atoms and clusters into one system represents a novel strategy for achieving the desired catalytic performance. In comparison to single‐atom catalysts, catalysts combining single atoms and clusters harness the advantages of both, thus displaying greater potential. Nevertheless, constructing single‐atom‐cluster systems remains challenging, and the fundamental mechanism for enhancing catalytic activity remains elusive. In this study, a directly confined preparation of a 3D hollow sea urchin‐like carbon structure (MnSA/MnAC‐SSCNR) is developed. Mn single atoms synergistically interact with Mn clusters, optimizing and reducing energy barriers in the reaction pathway, thus enhancing reaction kinetics. Consequently, in contrast to Mn single‐atom catalysts (MnSA‐SSCNR), MnSA/MnAC‐SSCNR exhibits significantly improved oxygen reduction activity, with a half‐wave potential (E1/2) of 0.90 V in 0.1 m KOH, surpassing that of MnSA‐SSCNR and Pt/C. This work demonstrates a strategy of remote synergy between heterogeneous single atoms and clusters, which not only contributes to electrocatalytic reactions but also holds potential for reactions involving more complex products.
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry