Interfacial oxidation using potassium ferrate to fabricate self-supported hydrophilic NiFe-LDH nanoarrays for overall water splitting at high current density

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)2 Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

“…55 However, in contrast to γ-FeOOH and Ni(OH) 2 , the energy barriers for each of the four-electron steps in the γ-FeOOH@Ni(OH) 2 heterojunction are neither too high nor too low, implying that the adsorption is neither too strong nor too weak, which is highly favorable for water decomposition. 56 We believe that this is due to the synergistic effect of γ-FeOOH and Ni(OH) 2 in the γ-FeOOH@Ni(OH) 2 heterojunction. 57 To confirm this, we focus on their electronic structures, as shown in Figure 6c, where the electronic states of both γ-FeOOH (middle of Figure 6c) and Ni(OH) 2 (bottom of Figure 6c) cross the Fermi energy level, indicating that the two structures have good conductivity properties for providing electron transfer.…”

“…We can also see that the larger adsorption energies of the *OOH intermediates in γ-FeOOH and Ni(OH) 2 , with the required dehydrogenation to form *O 2 , are Δ G *OOH = 1.638 and 1.941 eV, respectively, whereas the smaller adsorption energies of the *OH intermediates in γ-FeOOH, that is, the first reaction step of the hydropyrolysis processes (* → *OH) and Ni(OH) 2 in the third step (*O → *OOH), requires the lowest free energy, which implies that the other electronic steps in the four-electron step require higher potential inputs for atomic desorption to take place, which is detrimental to the hydrolysis process reaction . However, in contrast to γ-FeOOH and Ni(OH) 2 , the energy barriers for each of the four-electron steps in the γ-FeOOH@Ni(OH) 2 heterojunction are neither too high nor too low, implying that the adsorption is neither too strong nor too weak, which is highly favorable for water decomposition . We believe that this is due to the synergistic effect of γ-FeOOH and Ni(OH) 2 in the γ-FeOOH@Ni(OH) 2 heterojunction …”

CoNiFe‐layered double hydroxide decorated Co‐N‐C network as a robust bi‐functional oxygen electrocatalyst for zinc‐air batteries

“…Such high performance may also be credited to the more exposed LDHs sites from the highly mesoporous Co‐N‐C network. Moreover, their intimate contact also reduced the interfacial resistance, building efficient ionic and electronic pathways for rapid electronic transport and mass diffusivity during the redox reactions 40,41 …”

“…Moreover, their intimate contact also reduced the interfacial resistance, building efficient ionic and electronic pathways for rapid electronic transport and mass diffusivity during the redox reactions. 40,41…”

Green Strategy toward the Synthesis of NiFe-LDH-Heated Nanodispersions as a Kind of Highly Efficient UV-Blocking Materials

“…Thus, the preparation of nanodispersions of NiFe-LDHs is a prospective method to improve the dispersibility of such nanoparticles. Among several available methods for this process, metal salt coprecipitation is the most commonly used one. , Daire et al synthesized NiFe-LDH nanosheets by a heating operation in an oil bath at 100 °C for 48 h, but the as-obtained nanosheets are still easy to aggregate to each other . Tang et al prepared NiFe-LDH nanoflakes by a hydrothermal method on the surface of attapulgite, however, the resulting nanosheets also showed different degrees of aggregation .…”