Solution combustion synthesis of Ni-based hybrid metal oxides for oxygen evolution reaction in alkaline medium

Abstract

Ni-based mixed transition metal oxides (MTMO) (NixM1−xOy) were synthesized using the solution combustion synthesis (SCS), and investigated as electrocatalysts towards oxygen evolution reaction (OER) in alkaline medium.

Insight into nanocrystal synthesis: from precursor decomposition to combustion

“…It neglects the time consumed by the purification or the post-synthesis treatment procedures compared to the other established approaches. 27,28 In this approach, once the mixture reaches the ignition temperature, self-generated energy raises the reaction temperature to 4000 °C, 22 and within seconds per minutes, the precursor is converted into the corresponding stable metal/metal oxides.…”

“…This improvement is also attributed to the synergism effects resulting from heterojunction, although attributed to the electronic structure improvement of Ni (oxidation of Ni from Ni 2+ to Ni 3+ ). 28 Besides, Wrzesińska et al synthesized a rare-earth (RE) doped BiFeO 3 (Bi 0.9 RE 0.1 FeO 3 ) material using the SCS method. This work confirmed the promising properties of SCS for the synthesis of a neat and doped material with enhanced application potential.…”

“…25,26 It also reduces the time of purification and the post-synthesis treatment process. 27,28 Of course, different factors such as solution pH 18,29 that has great use in complex formation, precursor and stabilizing agent nature, 30,31 and temperature 32 has beneficial effects on the final products. Besides, the approach also comprises a decent dopant–host distribution or heterojunction via Pearson's hard/soft acids/bases (HSAB) theory.…”

MOF-Derived Cobalt@Mesoporous Carbon as Electrocatalysts for Oxygen Evolution Reaction: Impact of Organic Linker

“…Heretofore, IrO 2 and RuO 2 , and other precious metal-based electrocatalysts, are known as pioneering OER catalysts. However, their rarity and high cost preclude them from being employed in large-scale adoption. − As a result, developing low-cost, earth-abundant, and highly stable electrocatalysts is of utmost priority. ,− Significant endeavors have been sanctified to design and produce transition metal-based materials, such as metal oxides, metal hydroxides, metal sulfides, metal phosphides, and metal-embedded mesoporous carbon (metal/MC) materials. ,, Among them, metal/MC materials received considerable attention. This is attributed to the presence of defects and nitrogen doping to promote the electrical conductivity, lower the overpotential, enhance the electrochemical stability, and promote the electro-transfer process at the electrode/electrolyte interface. ,, …”

Gd3+-substituted BiFeO3 perovskite nanoparticles: facile synthesis, characterization, and applications in heterogeneous catalysis

“…The main benefit of combustion synthesis is that it produces very porous materials that can be used in catalytic applications. 31–33 Perovskite-type BiFeO 3 oxides are utilized in sensors, catalytic processes, photocatalytic processes, and spintronics devices. 1,34…”