Electrochemically active site-rich nanocomposites of two-dimensional materials as anode catalysts for direct oxidation fuel cells: new age beyond graphene

Abstract

Direct oxidation fuel cell (DOFC) has been opted as a green alternative to the fossil fuels and intermittent energy resources as it is economically viable, possesses good conversion efficiency, exhibits...

Enabling methanol oxidation by an interacting hybrid nanosystem of spinel Co3O4 nanoparticle decorated MXenes

“…Moreover, their acid-base properties make them suitable for electrocatalytic applications. 15 Different TMOs viz. NiO, Ni(OH) 2 , Co 3 O 4 , MnO x , etc.…”

“…are widely used as anode catalysts in alkaline DMFCs as TMOs are more stable in an alkaline medium. 12,15 In an alkaline medium, different oxidation states of Co are observed, viz. CoO (+2), Co 2 O 3 (+3), CoO 2 (+4), and Co 3 O 4 (+2, +3).…”

“…25 It is represented by the formula M n+1 X n T x (n = 1, 2, and 3), where T x represents surface terminating functional groups like OH, O and F. 26 Because of their intriguing properties, MXenes are becoming versatile materials and are used in multifarious applications, especially electronic devices, 27 catalysis, 28 electrochemical energy storage, 29 and conversion devices. 15 In the studies of different fuel cells, MXenes have been studied as competitive catalyst supports for noble metal nanoparticles, viz. Pt, Pd, Ru, etc., 15 their alloys, 15,30 and other non-Pt catalysts.…”

“…15 In the studies of different fuel cells, MXenes have been studied as competitive catalyst supports for noble metal nanoparticles, viz. Pt, Pd, Ru, etc., 15 their alloys, 15,30 and other non-Pt catalysts. 31 Since people are more concerned about obtaining highly stable and CO-resistant non-noble metal electrocatalysts nowadays, MXenes can be explored as support materials for different electroactive materials beyond Pt-group metals.…”

Metalated covalent organic frameworks: from synthetic strategies to diverse applications

“…510 The development of next-generation electrocatalysts with enhanced stability and catalytic activity is an ongoing challenge in energy conversion and storage research. 511,512 Electrocatalysts based on metal-free materials and inexpensive metals This journal is © The Royal Society of Chemistry 2022 such as graphene, 513,514 MXenes, 515,516 MOFs, [517][518][519][520] and COFs 126,479 are currently an active research area. Due to the well-defined and programmable structures, the study of COFelectrocatalysts can truly correlate the structure and properties and promote a deeper understanding of electrocatalytic principles, thus providing guidance for the development and optimization of novel electrocatalysts.…”