Single (Ni, Fe) atoms and ultrasmall Core@shell Ni@Fe nanostructures Dual-implanted CNTs-Graphene nanonetworks for robust Zn- and Al-Air batteries

Dual Single-Atom Moieties Anchored on N-Doped Multilayer Graphene As a Catalytic Host for Lithium–Sulfur Batteries

“…Other studies also confirmed the effectual function of host materials with single atoms in Li–S batteries. ,,− Dual single atoms can bring into play the synergistic effect of two metal moieties in different applications. − For example, in the process of hydrogenating 4-nitrostyrene to 4-vinylaniline, Ir single atoms affect H 2 activation and Mo single atoms are good at 4-nitrostyrene adsorption . In electrocatalysis, Fe single atoms showed better activity in oxygen reduction reactions, while Ni single atoms had higher activity in oxygen evolution reactions in alkaline media, which were good partners in Zn–air batteries and other metal–air batteries. , …”

“…49 In electrocatalysis, Fe single atoms showed better activity in oxygen reduction reactions, while Ni single atoms had higher activity in oxygen evolution reactions in alkaline media, which were good partners in Zn− air batteries and other metal−air batteries. 50,51 Herein, we developed Fe and Co dual single atomsdecorated N-doped multilayer graphene (denoted FeCoNGr) as a catalytic host material for Li−S batteries. An illustration of the electrochemical process of the FeCoNGr-based sulfur cathode is shown in Scheme 1.…”

Ni3Fe/Ni3Fe(OOH)x dynamically coupled on wood-derived nitrogen doped carbon as a bifunctional electrocatalyst for rechargeable zinc–air batteries

“…7,8 The prohibitive cost and scarce resources of noble metals, especially the unsatisfactory catalytic stability in batteries, have severely restricted the widespread application of noble metal-based catalysts. 9,10 Therefore, the rational design and synthesis of cost-effective and high-performance bifunctional electrocatalysts without relying on noble metals is significant for the development of ZABs. However, a severe challenge lies ahead of all researchers in the energy catalysis and ZABs field because of the lack of a chemical foundation for the detailed knowledge of the structure of catalysts and the mechanism of catalytic reaction.…”

Bimetallic Atom Dual-Doped MoS2-Based Heterostructures as a High-Efficiency Catalyst To Boost Solar-Assisted Alkaline Seawater Electrolysis

“…Recently, the idea of developing a multifunctional electrocatalyst derived from the unique combination of at least two active materials has been expected to be able to effectively overcome the issues mentioned above. − Such an approach can further reduce the effective loading of each active material and the complication of electrode fabrication, thereby efficiently extending the application scope of the catalyst and enabling it to be more economically viable. In particular, since two active metal materials are decreased in size from nano/clusters to a well-dispersed single atom (SA) state, there is an effective increase of the low-coordination metal sites having a fine-tuned electronic structure for selective drive-specific multielectron reactions with high catalytic properties, while potentially providing 100% site utilization. − In this context, dual SAs can provide two sites enabling independent binding energies toward each reactant in different catalytic reactions. − In addition, their specific assembly within the host material, whether in in-plane, bridged, or cofacial form, may also effectively improve selectivity for certain reactions. , Despite their superior electrocatalytic activities, it is difficult to achieve a controlled synthesis method to maintain high loading of individual metal atoms because of their low structural stability arising from high surface energy and weak interactions between SAs and supporting material. Usually, SA catalysts are favorably stabilized by coordination to heteroatom (N, P, and S)-doped nanocarbons, which are low cost, robust, and tunable. , However, the powder form of products requires a polymer binder to make an electrode, thus significantly reducing catalytic activities and stability.…”