Fe2O3/P-doped CoMoO4 electrocatalyst delivers efficient overall water splitting in alkaline media

Engineering hierarchical snowflake-like multi-metal selenide catalysts anchored on Ni foam for high-efficiency and stable overall water splitting

“…The electrochemically active surface area (ECSA) of the electrocatalyst is also a crucial parameter to evaluate the catalytic activity, and the values of the ECSA can be indirectly reflected by its double-layer capacitance ( C dl ) value. 49–51 The C dl values of each electrocatalyst can be obtained by cyclic voltammetry (CV) tests at different scan rates (from 20 to 100 mV s −1 ), as depicted in Fig. S7 †.…”

Electrochemical fabrication of multi-crystalline-amorphous heterogeneous single-atom electrocatalysts for alkaline oxygen evolution reaction

“…1 The production of green hydrogen through water electrolysis is a promising approach for developing sustainable clean energy, which involves the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode. 2,3 The OER involves the transfer of four electrons, which is particularly slow in kinetics and requires efficient electrocatalysts to lower the significant energy barrier of the multi-step proton-coupled process. 4 This significantly impairs the cost competitiveness of electrochemical hydrogen production.…”

Trimetallic FeNiMo Nanofibers as High-Efficiency Electrocatalyst for Robust Oxygen Evolution

“…In the narrow-scan Ni 2p spectrum (Figure b), the peaks at 853.1 and 870.0 eV are attributed to Ni 0 2p 3/2 and 2p 1/2 , indicating the existence of metallic Ni. ,, The binding energies at 856.2 and 874.1 eV indicate Ni 2+ 2p 3/2 and Ni 2+ 2p 1/2 , respectively. ,, The satellite peaks can be observed at 862.0 and 879.8 eV. The high-resolution Mo 3d spectrum of Fe 0.125 Ni 0.375 Mo 0.5 NFs (Figure c) can be fitted with four peaks at 230.4, 233.6, 232.6, and 235.6 eV, which are ascribed to Mo 4+ 3d 5/2 , Mo 4+ 3d 3/2 , Mo 6+ 3d 5/2 , and Mo 6+ 3d 3/2 , respectively. − This result illustrates that the surface of the Fe 0.125 Ni 0.375 Mo 0.5 NFs is partially oxidized, in agreement with previous reports. , The appearance of Mo 2+ in Fe 0.2 Mo 0.8 is related to the multivalent of Mo oxides. , To clarify the electronic effect of the introduced elements in Fe 0.125 Ni 0.375 Mo 0.5 NFs, the difference in the characteristic peak position between the binary and ternary samples is investigated. Obviously, the addition of Mo species in the ternary Fe 0.125 Ni 0.375 Mo 0.5 NFs brings a lower binding energy of Fe and a higher peak location of Ni relative to Fe 0.25 Ni 0.75 , which demonstrates a changed charge density between Ni and Fe, and the electron transfer from Ni to Fe.…”