Dynamic structure evolution of free-standing S-doped porous Co-Fe microspheres with enhanced oxygen evolution electrocatalysis in alkaline media

Doping Mo into NiFe LDH/NiSe Heterostructure to Enhance Oxygen Evolution Activity by Synergistically Facilitating Electronic Modulation and Surface Reconstruction

“…FeOOH. [30] Similarly, the characteristic peaks of Ni show that Ni 2 + are converted to Ni 3 + for NiOOH after stability test (Figure S9d). [26] The ratio of Mo 4 + /Mo 6 + after the stability test is 1.65, which is higher than the ratio of Mo 4 + /Mo 6 + (0.53) before the stability test, which may be due to the partial Mo with high valence gaining electrons in the reaction process (Figure S9e).…”

“…Similar surface reconstruction and re‐adsorption processes may have occurred in this work, so Mo species still appears in XPS characterization after the stability test. In the high‐resolution Fe 2p spectrum (Figure S9c), after the stability test, the Fe 2+ characteristic peak disappeared, and the Fe 3+ characteristic peak belongs to FeOOH [30] . Similarly, the characteristic peaks of Ni show that Ni 2+ are converted to Ni 3+ for NiOOH after stability test (Figure S9d) [26] .…”

Electrochemical preparation of nano/micron structure transition metal-based catalysts for the oxygen evolution reaction

“…77,78 In the electrosynthesis of sulfides, in addition to the corresponding metal salts, thiourea containing sulfur elements should be added as the sulfur source. 79,80 Additionally, in the electrosynthesis of transition metals/alloys, the corresponding sulfates and chlorides should be selected as the main salts of the electrolyte, and a variety of secondary salts and additives also need to be added. 60,81 3.3.2 Additives of electrolyte.…”

“…In principle, a synthesis method that can produce fine grains can be used in the production of nanomaterials. In the past few years, some important progress has been made in the electrodeposition of transition metalbased catalyst nanoparticles, such as NiO, 75 Co 3 O 4 , 104 CoFeS, 80 Ni 2 P, 105 and CoSe. 106 4.1.1 Nanospheres and nanoparticles.…”

Boosted Oxygen Evolution Reaction by Controllable Fluoridation on Porous Cobalt–Iron Nanoflakes

“…Development of renewable and clean energy is urgent to reduce the pressure of fossil fuel consumption. While wind, tidal, and solar energies as clean energy sources have been applied to balance the increased energy needs, these energies’ intermittent natures and storage problems limit their wide applications. , The oxygen evolution reaction (OER) is a regenerative method to produce hydrogen gas, but the complicated electron transfer process with slow reaction kinetics requires a higher overpotential to overcome the energy base. , Developing an effective and stable electrocatalyst becomes necessary to enhance the catalytic efficiency with the decreased overpotential during the water oxidation reaction. , Recently, ruthenium oxide (RuO 2 ) and iridium oxide (IrO 2 ) have gained attention because of their excellent electrocatalytic efficiency for OER. , However, their low stability in alkaline electrolytes and the high cost of noble metal oxides are critical issues for these catalysts in practical applications. − …”