Synthesis of NiHPO4–Ni(OH)2 nanowire-assembled bouquets for electrocatalytic oxidation of methanol and urea

Structural transformation of metal–organic frameworks and identification of electrocatalytically active species during the oxygen evolution reaction under neutral conditions

“…91 For Co–Ci-2D, the peak at 133.0 eV of P 2p 3/2 is in accordance with the previously reported P 2p 3/2 spectrum of Na 2 HPO 4 (133.0 eV), indicating the presence of Na 2 HPO 4 , which comes from the PBS solution. 92 For Ni–Ci-2D, the P 2p 3/2 peak at 133.2 eV is similar to the result of the reported NiHPO 4 (133.4 eV), 93 which demonstrates that NiHPO 4 was produced on the surface in the OER process. Why were different species, such as Na 2 HPO 4 and NiHPO 4 , detected in Co–Ci-2D and Ni–Ci-2D?…”

Regulating the Synergistic Effect in Bimetallic Two‐Dimensional Polymer Oxygen Evolution Reaction Catalysts by Adjusting the Coupling Strength Between Metal Centers

“…The EIS (Figure 4f) indicates that CoTAPP-Ni-MF-2DP displayed the smallest R ct among the 2DP catalysts, indicating the promoted electron transport at the catalyst/electrolyte interface and faster reaction kinetics. [17] In addition, all 2DPs displayed straight lines with � 45°slope in the low-frequency region, indicating the fast ion diffusion and transport. [18] All the electrochemical data proved that decreasing the intermetal distance and increase the conjugation degree of the bridge skeleton are beneficial to strengthen the charge transfer between the metal centers, and in turn improve the OER performance, which is consistent with our previous work (Table S3).…”

“…The charge transfer resistance ( R ct ) in electrochemical impedance spectroscopy (EIS) is a measure of the kinetics at the electrode/electrolyte interface. The EIS (Figure 4f ) indicates that CoTAPP‐Ni‐MF‐2DP displayed the smallest R ct among the 2DP catalysts, indicating the promoted electron transport at the catalyst/electrolyte interface and faster reaction kinetics [17] . In addition, all 2DPs displayed straight lines with ≈45° slope in the low‐frequency region, indicating the fast ion diffusion and transport [18] .…”