Journal
ADVANCED ENERGY MATERIALS
Volume 10, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201903181
Keywords
bonds and coordination; CO2 reduction; electrocatalytic energy conversion; nitrogen reduction; single atom catalysis
Categories
Funding
- Ministry of Education (Singapore) [MOE2018-T2-2-095]
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There is an intensive search for heterogeneous single atom catalysts (SACs) of high activity, efficiency, durability, and selectivity for a wide variety of electrocatalytic conversion and chemical reactions, such as the hydrogen evolution reaction (HER), oxygen evolution/reduction reaction (OER and ORR), CO2 reduction reaction (CO2 RR), and nitrogen reduction reaction (NRR). With the downsizing from nanoparticles and clusters to single atoms, there are steady changes in the bond and coordination environment for each and every atom involved. Indeed, the single atoms in these electrocatalysts are not singles; they are married to the supporting surfaces, and their performance is controlled by the bonding and coordination with the substrate surfaces. Herein, an overview is presented on the brief history leading to the rapid development of SACs and their current status, by focusing on their synthesis, control of composition, strategies to realize single atoms with the desired bonds and coordination, and targeted performance in selected reactions. Their applications in the selected spectrum of energy conversion and chemical reactions are discussed, in relation to their structures at varying length scales down to the atomic level. A particular emphasis is placed on on-going research activities, together with the future perspectives and particular challenges for SACs.
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