Controllable preparation of Ti/TiO2-NTs/PbO2–CNTs–MnO2 layered composite materials with excellent electrocatalytic activity for the OER in acidic media

Two-step facile synthesis of Co3O4@C reinforced PbO2 coated electrode to promote efficient oxygen evolution reaction for zinc electrowinning

“…The high-frequency semicircle represents the adsorption resistance (R f ) of the OER intermediates (S-OH ads and S-O ads ), and the low-frequency semicircle represents the charge transfer resistance (R ct ). 15,50 Each electrode exhibited a low adsorption resistance (R f ) value, reaching the smallest one when Co 3 O 4 @C electrodeposition concentration was 4 g L À1 . And the radius of curvature of the low-frequency semicircle in the Nyquist plot was smallest when the Co 3 O 4 @C electrodeposition concentration was 4 g L À1 , implying the smallest charge transfer resistance (R ct ) (2.18 U).…”

“…10 Hence, the development of a PbO 2 -coated electrode material with high electrocatalytic activity has always been the focus of research. For the past several decades, SnO 2 -Sb x O y , 11,12 IrO 2 -RuO 2 , 13,14 and TiO 2 nanotubes (TiO 2 -NTs) 15 have usually been fabricated as intermediate layers to improve the electrocatalytic activity and stability of PbO 2 . In addition, some ions and active particles including Ag 2+ , 16,17 Ni 2+ , 18,19 Sn 4+ , 20 RuO 2 , 21 CeO 2 , 22 MnO 2 , 23,24 carbon nanotubes (CNTs) 25 and Co 3 O 4 (ref.…”

An in situ formed ZIF-67 derived NiFeCo-P nano-array for accelerating the electrocatalytic oxygen evolution reaction

“…3 The oxygen evolution reaction (OER), however, is a slow four-electron kinetic reaction, which occurs far from the equilibrium (1.23 V vs. RHE). 4,5 Therefore, the OER is considered by the public as the bottleneck of the practical application of electrocatalytic hydrogen production. Designing high-performance OER electrocatalysts is an effective way to reduce the overpotential and elevate the energy conversion efficiency.…”