High-valent bimetal Ni3S2/Co3S4 induced by Cu doping for bifunctional electrocatalytic water splitting

Vanadium-Doping and Interface Engineering for Synergistically Enhanced Electrochemical Overall Water Splitting and Urea Electrolysis

“…When Fe was introduced, EIS results (Figure d) reveal that the charge transfer resistances of V-FeNi 3 N/Ni 3 N (3.5 Ω) and FeNi 3 N/Ni 3 N (9.5 Ω) are less than those of V-Ni 3 N (33.1 Ω), and Ni 3 N (60.1 Ω), revealing that Fe-doping could enhance the electrical conductivities of V-FeNi 3 N/Ni 3 N and FeNi 3 N/Ni 3 N at the electrode/electrolyte interface . The C dl value of V-FeNi 3 N/Ni 3 N is 11.8 mF cm –2 and larger than that of FeNi 3 N/Ni 3 N (7.7 mF cm –2 ) (Figure S13), implying that V-FeNi 3 N/Ni 3 N has a larger active surface area and could provide more active sites than FeNi 3 N/Ni 3 N for the OER . Besides, the durability of V-FeNi 3 N/Ni 3 N was measured by a multi-step current density approach, from 10 to 20, 50, and 100 and then back to 50 and 10 mA cm –2 with 10 h running at each step.…”

Interfacial Engineering of Two‐Dimensional MoN/MoO2 Heterostructure Nanosheets as a Bifunctional Electrocatalyst for Overall Water Splitting

“…Moreover, the selected area electron diffraction (SAED) pattern (Figure 2c) further validates the creation of hexagonal MoN and monoclinic MoO 2 , corresponding to the XRD and the HR‐TEM observation results. The nanosheets can shorten the electron transport path and exposed more active sites because of the increasing specific surface area of the catalyst and the exposed interface defects will expedite the adsorption and activation rate of the involved species at the interface, which can work together to promote the absorption/dissociation of H 2 O molecules [41] . Moreover, X‐ray photoelectron spectroscopy (XPS) was used to further confirm the elemental composition and valence state of MoN/MoO 2 ‐6.…”

“…The nanosheets can shorten the electron transport path and exposed more active sites because of the increasing specific surface area of the catalyst and the exposed interface defects will expedite the adsorption and activation rate of the involved species at the interface, which can work together to promote the absorption/dissociation of H 2 O molecules. [41] Moreover, Xray photoelectron spectroscopy (XPS) was used to further confirm the elemental composition and valence state of MoN/ MoO 2 -6. Figure 2d-f show the high-resolution XPS bands of Mo 3d, N 1s and O 1s respectively.…”

Fe incorporation-induced electronic modification of Co-tannic acid complex nanoflowers for high-performance water oxidation

“…1–6 Hydrogen has been widely deemed as one of the most promising energy carriers to satisfy the rapid-growing energy demand due to its high energy density and cleanliness. 7–10 Currently, electrochemical water splitting represents a readily-implemented and eco-friendly strategy to generate high-purity hydrogen. 11–13 However, as a half reaction of overall water splitting, the oxygen evolution reaction (OER) is generally regarded as the bottleneck of water splitting owing to the complex four-electron transfer pathway for the cleavage of O–H bonds and the formation of O–O bonds (4OH − → 2H 2 O + 4e − + O 2 ).…”