Electrocatalytic Oxidation of Methanol over An Electrode with Ni‐MOF‐74 Catalyst

Abstract

Developing non-noble metal catalysts for methanol oxidation in fuel cells is of importance. In this work, Ni-MOF-74 was synthesized through a simple solvothermal method and fully characterized. The as-made Ni-MOF-74 modified carbon paste electrode (Ni-MOF-74/CPE) was applied for methanol electrooxidation reaction in 0.1 M NaOH solution. Ni-MOF-74 had high electrochemical stability and exhibited good electrocatalytic property for methanol oxidation, a mechanism for the reaction was proposed, the current density increases impressively on Ni-MOF-74/CPE compared with carbon paste electrode, and a really high catalytic rate constant (k cat ) of 8.1 × 10 5 cm 3 • mol À 1 • s À 1 was obtained in this work. The given results indicate that Ni-MOF-74 can be a promising candidate of electrocatalysts for direct methanol fuel cells (DMFCs).

Metal–organic frameworks (MOFs) for hybrid water electrolysis: structure–property–performance correlation

“…[67][68][69] The literature suggests that MOFs, known for substantial potential improvement, also exhibit high efficiency in hydrogen evolution and yield significant amounts of hydrogen. 50,56,57 (vi) Industrial level application…”

“…3). 50,[56][57][58][59]62,63 Further, integration with other individual materials has also been performed to enhance the performance of MOFs. Overall, the rational design and synthesis of MOFs for electrocatalytic AORs require a deep understanding of both the structural properties of MOFs and the mechanistic aspects of the targeted AOR.…”

“…[49][50][51][52] In comparison to traditional catalysts, MOFs offer the significant potential improvements, including higher conversion rates and selectivity, excellent faradaic efficiency, increased hydrogen production, and larger current densities. 50,[56][57][58][59] In recent years, there has been a notable surge in research papers investigating various AORs with MOFs. [49][50][51][56][57][58][59][60][61][62][63] These studies delve into catalytic properties, such as composition, structure, and surface morphology, and their impact on AOR efficiency.…”

“…50,[56][57][58][59] In recent years, there has been a notable surge in research papers investigating various AORs with MOFs. [49][50][51][56][57][58][59][60][61][62][63] These studies delve into catalytic properties, such as composition, structure, and surface morphology, and their impact on AOR efficiency. [60][61][62][63] Researchers examine conversion rates, chemical yields, and factors influencing substrate conversion, aiming to identify optimal conditions and MOF-based catalysts for maximum chemical production.…”

Recent Developments of Methanol Electrooxidation Using Nickel‐based Nanocatalysts

“…[54][55][56] Thus, to illustrate, incredibly thin nickel foils are being often deployed for holding electroactive polymer-protected noble metal nanoparticles for electrocatalytic oxidation of methanol in alkali. [24][25][57][58] In the recent times, consistent and logical surveys on electrooxidation reactions demanded the usage of less costly electroactive materials that subsequently unveiled the corrosion resistant and highly electrically conducting nickel's electroactive surface characteristics, controllable electrochemical oxidation states, especially in alkaline conditions, that ultimately lead to impressive results in this field of research. [59] Thus, substantial amount of research on nickel-based electrocatalysts toward methanol electrooxidation has been conducted and reported.…”