MoSe2 regulates Ce-doped NiFe layered double hydroxide for efficient oxygen evolution reaction: The increase of active sites

Anchoring Ce-modified Ni(OH)2nanoparticles on Ni-MOF nanosheets to enhances the oxygen evolution performance

“…At a current density of 150 mA cm −2 , the Ce-m-Ni(OH) 2 @Ni-MOF electrode requires 260 mV overpotential, while the Ni(OH) 2 @Ni-MOF, Ce(OH) 3 @Ni-MOF, and Ni-MOF electrodes require 320, 375, and 424 mV, respectively. Furthermore, the low overpotential of the Ce-m-Ni(OH) 2 @Ni-MOF electrode can be comparable to the reported advanced catalysts, such as N–Ni 1 Co 4 –S ( η 10 mA cm −2 = 284 mV), 16 Ni–Fe–Ce LDH ( η 10 mA cm −2 = 242 mV), 26 6.7% Ce–NiFe LDH@MoSe 2 ( η 10 mA cm −2 = 221 mV), 43 and other metal catalysts (Table S1†).…”

“…3d) was fitted into four peaks of lattice oxygen in the metal (M)–O bond (529.61 eV), oxygen in Ni–OH (531.21 eV), oxygen vacancies (532.01 eV), O–CO (533.21 eV) and water molecules adsorbed on the surface. 43,44 Compared with Ni(OH) 2 @Ni-MOF, the O 1s peak moves 0.29 eV to high binding energy, which suggests that the presence of cerium improves the electronic interactions between M and O. Therefore, Ce-modification changes the electronic structure of Ni, which will improve the electrocatalytic performance.…”

“…N-Ni 1 Co 4 -S (η 10 mA cm −2 = 284 mV), 16 Ni-Fe-Ce LDH (η 10 mA cm −2 = 242 mV), 26 6.7% Ce-NiFe LDH@MoSe 2 (η 10 mA cm −2 = 221 mV), 43 and other metal catalysts (Table S1 †).…”

Fabrication of Trimetallic Fe–Co–Ni Electrocatalysts for Highly Efficient Oxygen Evolution Reaction

“…Among the analyzed catalysts, the measured Tafel slope of Fe–Ni–Co­(cv) was the lowest at 63 mV/dec, indicating that the catalytic reaction kinetics were the fastest. EIS analysis was performed to measure and substantiate the double-layer capacitance ( C dl ) and charge-transfer resistance ( R ct ) in the CV analysis, disproving the effective surface area of the catalyst. − The Nyquist plots of all samples are shown in Figure c, and the results show the lowest R ct (1.42 Ω) value for Fe–Ni–Co­(cv). In addition, the stability evaluation of the Fe–Ni–Co­(cv) catalyst shown in Figure d indicates that it has excellent durability for more than 48 h at high current density (200 mA/cm 2 ).…”

Three-Dimensional Strawlike MoSe2-Ni(Fe)Se Electrocatalysts for Overall Water Splitting

“…28 Rong et al exhibited that Cedoped NiFe LDH@MoSe 2 can change the lattice structure, introduce defects, and increase OER active sites, leading to a relatively low overpotential of 221 mV@10 mA cm −2 . 29 In addition, the transition metal Fe element has rich reserves, low price, and good OER activity. 30,31 It is reported that Fe doping can improve the OER performance of catalysts.…”