Abstract
The performance and cost of electrocatalysts play an important role in the development and application prospects of energy conversion technology. Single-atom catalysts (SACs) have constituted a new frontier in the field of catalytic science in recent years. As a non-precious metal, iron (Fe)-SACs show great potential in the field of electrocatalysis, which is comparable to or even better than the performance of precious metal catalysts. However, a robust, generic synthetic strategy toward atomically dispersed Fe catalysts is still lacking, which is still a formidable challenge to maintain the dispersion of Fe atoms at high temperatures and to obtain high catalytic activity. In this review, the latest progress in the synthesis of Fe-SACs is introduced and summarized, and the electrochemical applications of Fe-SACs are further summarized and discussed. Herein, the relationship between the structural characteristics and performance of Fe-SACs is further introduced and discussed. Finally, the existing problems and development prospects of Fe-SACs are discussed.
Highlights
Single-atom catalysts (SACs) combine the advantages of heterogeneous catalysts and homogeneous catalysts, and bridge the gap that exists between them with their unique performance
The latest research shows that iron (Fe)-SACs can be used in a variety of electrocatalytic reactions such as hydrogen evolution reactions (HERs), oxygen reduction reactions (ORRs), nitrogen reduction reactions (NRRs), and CO2RRs (Fig. 1), exhibiting the same or even better catalytic performance than precious metal catalysts.[8,16,17,18,19]. These results provide a new possibility for the substitution of precious metal catalysts and show a great application prospect
We present an in-depth understanding of Fe-based SACs from the following aspects: (1) the relationship between structural characteristics and performance, (2) the application in the eld of electrocatalysis, and (3) the preparation strategy of Fe-based
Summary
Yongfei Wang received his BS from China University of Mining and Technology in 2005, and his MS and PhD in Chemical Engineering from the University of Science and Technology Liaoning (USTL) in 2008 and 2018, respectively. He is currently working as a lecturer in USTL. His current research interests include functional materials and catalysts for electrochemical energy technologies. SACs. we look forward to the prospects and challenges of Fe-SACs
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