V2C MXene synergistically coupling FeNi LDH nanosheets for boosting oxygen evolution reaction

FeNi LDH/V2CTx/NF as Self-Supported Bifunctional Electrocatalyst for Highly Effective Overall Water Splitting

“…As seen in Figure 3 a, FeNi LDH/V 2 CT x /NF electrocatalyst with a minimum overpotential of 222 mV to achieve 10 mA cm −2 (η 10 = 222 mV) exhibits highest catalytic activity, as compared with NF electrocatalysts (η 10 = 400 mV), V 2 CT x /NF electrocatalysts (η 10 = 380 mV), Ni(OH) 2 /V 2 CT x /NF electrocatalysts (η 10 = 326 mV) and RuO 2 /NF (η 10 = 265 mV); moreover, FeNi LDH/V 2 CT x /NF electrocatalyst achieves 50 mA cm −2 with the lowest overpotential of 265 mV ( Figure 3 b). Meanwhile, when comparing with the representative materials in Table S1 FeNi LDH/V 2 CT x /NF affords superior OER activity (η 10 = 222 mV) to the excellent electrocatalysts reported recently, such as FeNi LDH/Ti 3 C2T x (η 10 = 298 mV) [ 15 ], CoNi-LDH/Ti 3 C 2 T x (η 10 = 257 mV) [ 49 ], H 2 PO 2− /FeNi LDH/V 2 CT x (η 10 = 250 mV) [ 36 ] and N-CoFe LDH/NF (η 10 = 233 mV) [ 50 ]. As seen in Figure 3 c, the FeNi LDH/V 2 CT x /NF electrocatalyst shows the lowest Tafel slope of 58.7 mV dec −1 , as compared with FeNi LDH/NF (111.5 mV dec −1 ), V 2 CT x /NF (786.9 mV dec −1 ), Ni(OH) 2 /V 2 CT x /NF (105.8 mV dec −1 ), NF (1708.6 mV dec −1 ) and commercial RuO 2 /NF (67.9 mV dec −1 ).…”

“…In the MXene family, V 2 CT x has various oxidation states of vanadium ion, so that the V surface layer may produce pseudocapacitive behavior [ 35 ], thus promoting the charge transfer between adsorbent and V 2 CT x carrier. The previous work of our group has proved that the combination of V 2 CT x and FeNi LDH can enhance the conductivity of FeNi LDH, reduce agglomeration phenomenon, and has excellent ORR and OER, which can be applied to a zinc–air battery [ 36 ]. To further explore and enhance the electrocatalytic performance of FeNi LDH, FeNi LDH/ V 2 CT x was grown on NF to form a self-supporting electrode for efficient water splitting.…”

Layered FeCoNi double hydroxides with tailored surface electronic configurations induced by oxygen and unsaturated metal vacancies for boosting the overall water splitting process

“…6e. [55][56][57][58][59][60][61][62][63][64][65] The electron/charge transfer kinetics of the as-prepared electrocatalysts were also investigated by electrochemical impedance spectroscopy (EIS) analysis, as shown in Fig. S5.…”

Integrated Co4MnFe3/Ti3C2: Componential and Structural Engineering toward Boosting Electrocatalytic Oxygen Evolution

“…21 The abovementioned Ti 3 C 2 -based electrocatalysts only involve nonmetallic materials, 22,23 single metals, 24 or bimetals. 25,26 To date, the loading of multimetal materials has not been explored enough.…”

“…The strong synergistic interaction between FeCo-LDH and MXene gave FeCo-LDH/MXene high electron transfer capability and abundant active sites . The abovementioned Ti 3 C 2 -based electrocatalysts only involve nonmetallic materials, , single metals, or bimetals. , To date, the loading of multimetal materials has not been explored enough.…”