Strongly coupled iron selenides-nitrogen-bond as an electronic transport bridge for enhanced synergistic oxygen electrocatalysis in rechargeable zinc-O2 batteries

Aligned Ferric Oxide/Graphene with Strong Coupling Effect for High-Performance Anode

“…Learning from the coupling effect of interfacial engineering, the electronic coupling effect would form an imbalanced electric field. − For example, Chen et al reported that the cobalt sulfide was strongly coupled with graphene, and the hybrid exhibited an excellent charge transfer ability . Moreover, the imbalanced electric field may redistribute the charges and enhance the affinity for Li + , and the high adsorption for Li + can boost the reaction kinetics. − Due to the unique properties such as ultrahigh conductivity (10 8 S/m) and specific area (2630 m 2 /g), the graphene is widely employed as a conductive additive and buffer to enhance the performance of anodes. − Therefore, the construction of a strong coupling effect at the interfaces between Fe 3 O 4 and graphene is a promising way to greatly enhance the conductivity, avoid pulverization, and promote kinetics for Li + diffusion.…”

A simple method for the preparation of a nickel selenide and cobalt selenide mixed catalyst to enhance bifunctional oxygen activity for Zn–air batteries

“…The O element was attributed to the exposure to air, which was consistent with the description in the literature. 32 As displayed in Fig. 4a , the Ni 2p spectrum was deconvoluted into two main peaks along with two satellite peaks.…”

“…Because of the nitrogen-doped mesoporous carbon (NMC) modifying the CoSe, CoSe@NMC displays excellent performance for OER and ORR. 31 However, the transition metal selenides practically gain the bifunctional electrocatalysis by many complicated strategies consisting of the construct of heterointerfaces, 32 engineering of the defect, 25 and formation of electronic interaction 33,34 to optimize the adsorption/desorption of reaction intermediates. Therefore, it is important to develop an excellent, durable, and inexpensive bifunctional electrocatalyst based on transition metal selenides for ORR and OER by a simple and easy method, which really contributes to the practical application of zinc–air batteries.…”

Constructing Conductive Channels between Platinum Nanoparticles and Graphitic Carbon Nitride by Gamma Irradiation for an Enhanced Oxygen Reduction Reaction

“…However, the CN/Pt composite material we prepared possesses excellent oxygen reduction performance, which can be seen from the TEM image that shows that the PtNPs were evenly dispersed, so no conductive path can be formed between the platinum nanoparticles. Therefore, we infer that a conductive path is formed between platinum and carbon nitride and that can accelerate electron transfer, thereby significantly improving the oxygen reduction activity. ,− Scheme describes the construction of the charge transfer pathway with the interface reaction process of g-C 3 N 4 and CN/Pt. The ORR can result in two different final products, water (H 2 O) or hydrogen peroxide (H 2 O 2 ), depending on whether it follows the fast four-electron pathway (eq ) or sluggish two-electron pathway (eqs –) …”