MXene-derived Ti₃C₂–Co–TiO₂nanoparticle arraysviacation exchange for highly efficient and stable electrocatalytic oxygen evolution

Abstract

A cation exchange strategy is proposed to convert layered Ti3C2-Na-TiO2 MXene nanofibers into Ti3C2-Co-TiO2 MXene nanoparticle arrays with open-layered 3D structure and numerous heterogeneous interfaces, which deliver excellent oxygen evolution...

A phase and interface co-engineered MoPxSy@NiFePxSy@NPS-C hierarchical heterostructure for sustainable oxygen evolution reaction

“…8 At the same time, the electrocatalytically active surface area (ECSA) was also estimated according to the equation ECSA = C dl / C s ( C s = 0.04 mF cm −2 , 1 M KOH). 51 As expected, the MoP x S y @NiFeP x S y @NPS-C catalyst shows the highest ECSA value (Fig. S19†).…”

Interface Catalysts of Ni3Fe1 Layered Double Hydroxide and Titanium Carbide for High-Performance Water Oxidation in Alkaline and Natural Conditions

“…More importantly, our Ni 3 Fe 1 -LDH/Ti 3 C 2 T x catalysts readily drive water oxidation at high current densities of 500 and 1000 mA cm –2 at very low potentials of 1.57 and 1.62 V, respectively, as shown in Figures e and S6. The excellent OER performance makes our Ni 3 Fe 1 -LDH/Ti 3 C 2 T x comparable to most nonprecious OER electrocatalysts reported in the literature, including Co–Fe–P, Co 0.13 Ni 0.87 Se 2 /Ti, Co@CoTe 2 , NiPS 3 -G, B–Ni@NF, S:Co 2 P@NF, Ni 3 B@rGO, NiTe NR/NF, Co 2 P, NiFeP x -NC, Mo/Mo 2 C@CoO@NC, and Ti 3 C 2 -Co-TiO 2 , as shown in Figure f and Table S2. Overall, these above results unambiguously confirm that our Ni 3 Fe 1 -LDH/Ti 3 C 2 T x demonstrates outstanding performance over the full range of current densities and possesses robust industrially relevant stability for water oxidation applications.…”

2D Ti3C2Tx MXene-Supported Graphitic Carbon-Nitride-Decorated Co3O4 Nanoparticles as Efficient Catalysts for Oxygen Evolution Reaction

“…To reflect the catalytic properties of the material more visually, volcano plots were made using the overpotential and Tafel slope, as shown in Figure 5(c) and Figure 6(c) for different samples and different mass ratios of TCN, respectively. The overpotential required for TCN (2:1:1) at a current density of 10 mA cm −1 is even lower than that for the Ti 3 C 2 -Co-TiO 2 MXene nanoparticle array with Co as the active site (276 mV) 65 and Co single atoms anchored on the Ti 3 C 2 Tx Substrate (Co@Ti 3 C 2 Tx) (388 mV). 66 Furthermore, long-term durability testing of OER is important to evaluate the practical application of electrocatalysts; therefore, we further tested the LSV of TCN (2:1:1) and TCN (2:5:5) after 1000 CV cycles of testing, as shown in Figure 6(e) and (g).…”