Ni(OH)₂-SnO₂ at the Hybrid Interface of Zeolite-Y and rGO for Electrochemical Oxidation of Methanol and Ethanol

Abstract

Nickel hydroxide (Ni­(OH)2) decorated in the framework of zeolite-Y and combined with SnO2, SnO2-Ni­(OH)2-Y, was conceived as a cost-effective electrocatalyst for electrochemical oxidation of methanol and ethanol (MOR and EOR). Significant enhancement in the current density was observed in both the electrochemical oxidation processes on combining the SnO2-Ni­(OH)2-Y with reduced graphene oxide (rGO). The maximum current density in the case of the MOR was found to be 2.2 Amg–1, while the same in the case of the EOR was found to be 2.0 Amg–1. The prepared electrocatalyst SnO2-Ni­(OH)2-Y/rGO was found to be superior in terms of stability compared to SnO2-Ni­(OH)2-Y. The current density did not drop abruptly up to 1000 cycles, implying the high stability of the material under alkaline conditions. This was further evident from the chronoamperometry measurement. The linear relationship between the current density and the square root of the scan rate also suggested that both the MOR and EOR followed the diffusion-controlled mechanism. The catalyst SnO2-Ni­(OH)2-Y/rGO also exhibited good methanol and ethanol tolerance up to a maximum concentration of 6 M.

Future Perspectives on Zeolite/Graphene Oxide Composite Synthesis and Applications

“…This helped the oil to separate from the attachment and shed from it. GO­(magnetic)-assisted microwave treatment therefore has the potential to improve oil recovery . Poplar powder that had all the lignin removed was combined with nickel sulfate, GO, (NH 4 ) 2 HPO 4 and melamine.…”

“…GO(magnetic)-assisted microwave treatment therefore has the potential to improve oil recovery. 206 Poplar powder that had all the lignin removed was combined with nickel sulfate, GO, (NH 4 ) 2 HPO 4 and melamine. The composite transforms into a hierarchical porous carbon material after carbonization and activation with KOH.…”

Spinel Nickel–Cobalt Oxide Nanorods Supported on Ti3C2Tx-MXene Nanosheets as Electrocatalysts for the Methanol Oxidation Reaction via a CO-Free Pathway

“…Numerous publications have reported on transition metal oxide electrocatalysts as non-noble metal catalysts to improve the performance of the alcohol oxidation reaction due to the advantage of high redox reactions and improved electron conductivity. − Spinel nickel cobaltite (NiCo 2 O 4 ) electrocatalysts are suitable for ADMFCs because NiCo 2 O 4 improves the methanol electrooxidation activity by facilitating fast electron transfer from the substituted Ni 2+ to Co 2+ in the spinel lattice, and they have a lower affinity for CO poisoning than other metal catalysts. , To improve the electrocatalytic performance, adequate morphological control of the NiCo 2 O 4 nanostructure is an efficient tactic that can significantly improve their atom utilization, electroactivity, and long durability. − Because of their distinctive physical and chemical characteristics, one-dimensional (1D) NiCo 2 O 4 nanorods have received considerable interest in electrocatalysis. The specific 1D morphology makes NiCo 2 O 4 nanorods effective. , As a result, the NiCo 2 O 4 nanorods exhibit superior activity for electrocatalytic reactions in contrast to other traditional nanostructures such as urchin, coral, sheaf, quasi-spherical, and hexagonal plates …”