Dual‐Active‐Sites Single‐Atom Catalysts for Advanced Applications

Abstract

Dual‐Active‐Sites Single‐Atom catalysts (DASs SACs) are not only the improvement of SACs but also the expansion of dual‐atom catalysts. The DASs SACs contains dual active sites, one of which is a single atomic active site, and the other active site can be a single atom or other type of active site, endowing DASs SACs with excellent catalytic performance and a wide range of applications. The DASs SACs are categorized into seven types, including the neighboring mono metallic DASs SACs, bonded DASs SACs, non‐bonded DASs SACs, bridged DASs SACs, asymmetric DASs SACs, metal and nonmetal combined DASs SACs and space separated DASs SACs. Based on the above classification, the general methods for the preparation of DASs SACs are comprehensively described, especially their structural characteristics are discussed in detail. Meanwhile, the in‐depth assessments of DASs SACs for variety applications including electrocatalysis, thermocatalysis and photocatalysis are provided, as well as their unique catalytic mechanism are addressed. Moreover, the prospects and challenges for DASs SACs and related applications are highlighted. The authors believe the great expectations for DASs SACs, and this review will provide novel conceptual and methodological perspectives and exciting opportunities for further development and application of DASs SACs.

Nanostructure engineering of ruthenium-modified electrocatalysts for efficient electrocatalytic water splitting

“…Incorporating the secondary metal atom contributes to the optimization of the adsorption–desorption process of reaction intermediates on dual metallic active sites, resulting in the promoted electrocatalytic activity and stability. 77,83–86 Recently, Zhao et al synthesized a Ru/Co–N–C catalyst with atomically Ru/Co dual-sites dispersed on an N-doped carbon matrix (Fig. 3a–f), which shows outstanding bifunctional catalytic performance for overall water splitting under both acidic and alkaline conditions.…”

Highly efficient CO2 electrochemical reduction on dual metal (Co–Ni)–nitrogen sites

“…20 However, the catalytic efficiency of SACs is constrained by their sole active centres, inhibiting multi-atom pathways, thus restricting their overall performance. 21 In contrast, dual-active site catalysts (DASCs), which utilize two metal species to form a dual-metal single-site catalyst, promise to offer complementary functionalities and synergistic effects. 22,23 This is facilitated by electronic interactions between the adjacent heteroatomic metal species, allowing for tailored binding energies with intermediates.…”