Tailoring electronic structure of copper nanosheets by silver doping toward highly efficient electrochemical reduction of nitrogen to ammonia

Multicomponent TiO2/Ag/Cu7S4@Se Heterostructures Constructed by an Interface Engineering Strategy for Promoting the Electrocatalytic Nitrogen Reduction Reaction Performance

“…The Ag 3d spectra of TiO 2 /Ag/Cu 7 S 4 @Se-CC, TiO 2 /Ag/Cu 7 S 4 -CC, Ag/Cu 7 S 4 @Se-CC, and TiO 2 /Ag-CC are given in Figure c. Ag shows symmetric bipolar peaks at 374.505 and 368.44 eV, which can be assigned to metal Ag 3d 3/2 and Ag 3d 5/2 , respectively . The main peaks of silver in each Ag-containing sample are not shifted, suggesting that silver is neither an electron donor nor electron acceptor.…”

“…Ag shows symmetric bipolar peaks at 374.505 and 368.44 eV, which can be assigned to metal Ag 3d 3/2 and Ag 3d 5/2 , respectively. 33 The main peaks of silver in each Ag-containing sample are not shifted, suggesting that silver is neither an electron donor nor electron acceptor. Additionally, as shown in Figure 2d, the high-resolution S 2p spectrum is decomposed into four peaks, the peaks centered at 161.7 and 162.5 eV corresponding to S 2− 2p 3/2 and S 2− 2p 1/2 , the peaks centered at 163.5 and 164.3 eV corresponding to (S 2 ) 2− 2p 3/2 and (S 2 ) 2− 2p 1/2 , in which the values of the binding energies are the typical values of metal sulfide and metal disulfide.…”

Tailoring Electronic Structure of Copper Twin Boundaries Toward Highly Efficient Nitrogen Reduction Reaction

“…[7][8][9] However, considerable efforts have been devoted to tailor the performance of electrochemical NRR, which still suffers from low NH 3 yield and faradaic efficiency (FE) by lacking effective catalysts. [10,11] Two major factors limit the discovery of novel catalysts, as the N�N bond with extremely large bonding energy (945 kJ mol À 1 ) is difficult to activate, and the competitive hydrogen evolution reaction (HER) could occupy the finite active sites under aqueous condition. [12][13][14][15][16] A rational catalyst design principle is thus appealing to conquer the above challenges.…”

The development of catalysts for electrochemical nitrogen reduction toward ammonia: theoretical and experimental advances

“…−1 with a FE of 20.91% at −0.4 V vs. RHE. 77 Here, we present a summary of recent experimental advances relating to the eNRR (Table 1).…”

“…[98][99][100][101] Very recently, we synthesized silver-doped copper nanosheets on carbon paper (Ag-Cu NS / CP) via a simple electrochemical deposition method in the presence of 3,5-diamino-1,2,4-triazole (DAT), and these were used as the electrocatalyst for the eNRR. 77 HRTEM image (Fig. 9a) of Ag-doped Cu nanosheets shows the high crystallinity, and clear lattice fringes of 0.223 nm are observed, which are ascribed to the (111) planes of face-centred cubic (fcc) Cu.…”