Atomic CoN3S1 sites for boosting oxygen reduction reaction via an atomic exchange strategy

Piperazine-Linked Metalphthalocyanine Frameworks for Highly Efficient Visible-Light-Driven H2O2 Photosynthesis

“…As can be seen, the peaks due to C, N, F, and Co elements could be clearly observed in their overall XPS spectra, in line with the EDX mapping results. In the high-resolution Co 2p XPS spectra, both COFs display two peaks at 780.6 and 796.2 eV, ascribed to Co 2p 3/2 and Co 2p 1/2 of Co­(II), respectively (Figure c). In the high-resolution N 1s XPS spectra, the N 1s peak for both COFs can be deconvoluted into three peaks due to the aza N at 398.5 eV and Co–N at 399.7 eV in the Pc moiety , and the −C–NH–C– at 399.1 eV in the piperazine groups (Figure d), further verifying the successful formation of piperazine-connected CoPc-based COFs.…”

Recent progress in the synthesis of transition metal nitride catalysts and their applications in electrocatalysis

“…11l, the half-wave potential of A-CoN 3 S 1 @C in 1.0 M KOH is 0.91 V ( vs . RHE), and the limiting current density is 5.81 mA cm −2 , with higher ORR activity than that of A-CoN 4 @C. This indicates that doping with S and the CoN 3 S 1 part can improve ORR catalytic activity by regulating the electronic structure of Co. 143 The metal nitrides can enhance the ORR catalytic performance and iodine adsorption in zinc-iodine batteries, and the amorphous iron nitride structure can form abundant defects and provide more catalytic active sites, reducing the reaction polarization. 144…”

“…Zhi et al reported an A-CoN 3 S 1 @C electrocatalyst based on the atomic exchange strategy. 143 S doping can adjust the electronic structure of the catalytic active center to improve the electrocatalytic activity. As shown in Fig.…”

“…Copyright 2019, American Chemical Society. (l) LSV curves of N/S/C, 20 wt% Pt/C, A-CoN@N/S/C, A-CoN 4 @C and A-CoN 3 S 1 @C catalysts at a rotation rate of 1600 rpm (scan rate: 5 mV s −1 ) 143. Copyright 2022, Springer Link.…”

Recent Progress and Prospects of Manganese–Nitrogen–Carbon Electrocatalysts for Oxygen Reduction Reaction

“…The introduction of additional heteroatoms can disrupt the electron density symmetry at the Mn–N–C active site and adjust the interfacial configuration of the Mn atom. ,, To improve the local cooperation environment of the Mn–N x , less electronegative heteroatom dopants (S, P, B, etc.) can be introduced as the first or second nearest neighbor coordination atoms. ,, These heteroatoms are incorporated into Mn–N–C to adjust their electronic and geometric properties. ,, Heteroatomic coordination can modify the electrical structure of Mn atoms, heighten the binding affinity of reactants, and enhance the resistance to deactivation of catalysts. , Optimization of the coordination environment of heteroatoms has been shown significantly to enhance both the catalytic efficacy and stability. ,, …”