Self-supported NbSe2 nanosheet arrays for highly efficient ammonia electrosynthesis under ambient conditions

NbSe2 Meets C2N: A 2D‐2D Heterostructure Catalysts as Multifunctional Polysulfide Mediator in Ultra‐Long‐Life Lithium–Sulfur Batteries

“…[ 33 ] The binding energies of the main component in the Se 3d XPS spectrum, at 53.4 (3d 5/2 ) and 54.2 eV (3d 3/2 ), are consistent with Se 2– within a metal selenide environment (Figure S8e, Supporting Information). [ 33,34 ] Besides, the bands at 55.3 and 56.2 eV were associated with a Se within a oxidized surface environment. The valence band XPS spectrum showed the Fermi level to lay within a band of states, thus demonstrating the metallic character of the produced composite (Figure S8f, Supporting Information).…”

Metal‐Free Bifunctional Ordered Mesoporous Carbon for Reversible Zn‐CO2 Batteries

“…[ 23 ] The transmission electron microscopy (TEM, Figure 1b and Figure S1, Supporting Information) images show that the ordered meso‐ and microporous structure were perfectly inherited from SBA‐15 zeolite (Figure S1, Supporting Information), which would not only accelerate the transportation of reactants/intermediates but also expose abundant active nitrogen sites for electrocatalysis. [ 24,25 ] The energy‐dispersive X‐ray (EDX) spectroscopy elemental mappings show that nitrogen elements are distributed homogenously over the entire carbon matrix of NOMC (Figure S2, Supporting Information). For comparison, the ordered mesoporous carbon (OMC) and nitrogen‐doped carbon (NC) samples were also successfully synthesized (Figures S3 and S4, Supporting Information).…”

“…Considering the similar nitrogen content for the two samples (Table S1, Supporting Information), the higher CO 2 RR activity of NOMC can be attributed to its higher exposure to active sites and better mass transferability. [ 24,41 ] It is suggested that the CO 2 transport can be enhanced by the porosity of the electrode through increasing the gas permeability and effective diffusivity. [ 42 ] For OMC, the ECSA‐corrected j co value is much lower than that of NOMC and NC, suggesting poor intrinsic activity.…”

Engineering Atomic Sites via Adjacent Dual‐Metal Sub‐Nanoclusters for Efficient Oxygen Reduction Reaction and Zn‐Air Battery

“…[4][5][6] Therefore, designing cost-effective electrocatalysts with superior activity and sufficient stability is thereby increasingly attractive for ORR and advanced energy devices. [7][8][9][10][11] As an important alternative to the expensive platinum-based catalysts, the earthabundant metals anchored on N-doped carbon, [12,13] especially in the form of M−N−C (M = Fe, Co, Ni, Cu, Mn, Zn, etc. ), [14][15][16][17][18] are attracting great attention recently due to their low cost and unexpected ORR reactivity.…”

“…[ 4–6 ] Therefore, designing cost‐effective electrocatalysts with superior activity and sufficient stability is thereby increasingly attractive for ORR and advanced energy devices. [ 7–11 ]…”