RESEARCH / A0464
Unveiling Ionized Interfacial Water-Induced Localized H* Enrichment for Electrocatalytic Nitrate Reduction
Read the original paper · 10.1002/anie.202413033 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 2. Structure characterization. a) PXRD spectrum and simulated XRD spectrum of Cu2Cl2(BINAP)2. b) Cu LMM XPS spectra of Cu2X2(BINAP)2 (X=Cl, Br, I). c) Cl 2p XPS spectrum of Cu2Cl2(BINAP)2. d) Cu K-edge XANES spectra of Cu2Cl2(BINAP)2, Cu2Br2(BINAP)2, Cu2I2(BINAP)2, and reference samples. e) RSFs of the CHCs obtained from the EXAFS spectra. f) RSFs (solid line) and curvefit (dotted line) results of Cu K-edge for Cu2Cl2(BINAP)2. g) WT contour plot of Cu2Cl2(BINAP)2. h) Charge density difference for Cu2Cl2(BINAP)2. The blue and yellow electronic clouds indicate charge depletion and accumulation, respectively.
Figure 4. In situ characterization. a) Gaussian-fitted peaks of in situ FTIR spectra revealing the three O H stretching modes of interfacial water on Cu2Cl2(BINAP)2 catalyst in NO3RR process. b) Potential-dependent population of interfacial water from in situ FTIR of Cu2Cl2(BINAP)2. c) Quasi-in situ electrochemical EPR signals for Cu2Cl2(BINAP)2 in 0.5 M K2SO4+0.1 M KNO3 at 0.946 V vs. RHE. d) Cu K-edge of the in situ XANES revealing the transformation of CHCs. e) RSFs of the CHCs obtained from the in situ EXAFS data. f) Schematic diagram of the electrocatalytic NO3RR with localized H* enrichment for facilitating the hydrogenation process.