Stereoassembly of ultrasmall Rh-decorated zeolite imidazolate framework–MXene heterostructures for boosted methanol oxidation reaction

Abstract

Due to the diminishing energy resources and environmental pollution issues, direct methanol fuel cell (DMFC) as a green energy generator becomes a high profile in recent decades, which stimulates the...

Flower-like Layered NiCu-LDH/MXene Nanocomposites as an Anodic Material for Electrocatalytic Oxidation of Methanol

“…Recently, 2D layered transition-metal carbides and nitrides (MXenes) are also identified as potential substrates for the hybridization of LDH matrices owing to their robust interfacial electrostatic interactions . Indeed, MXenes are also reported as an anodic electrode material for methanol oxidation in DMFC applications. − MXene was derived from the MAX phase, which is a polycrystalline nanolaminate of ternary carbides and/or nitrides with general notation (M n +1 AX n ), where M denotes transition metals; A corresponds to the group III A or IV A elements (in general, Al or Si) and X stands for carbon and/or nitrogen. The synergism between LDH and MXene nanocomposites possesses enhanced catalytic activity and has been explored as electrode materials in energy applications. − However, based on the previous reports, no work has been reported on LDH/MXene nanocomposites as an electrocatalyst for the oxidation of methanol.…”

Polypyrrole Template-Assisted Synthesis of Tubular Fe-NC Nanostructure-Based Electrocatalysts for Efficient Oxygen Reduction Reaction in Rechargeable Zinc–Air Battery

“…The full survey of Fe-NC@NCNT reveals the coexistence of C, N, O, and Fe (Figure a). As shown in Figure b, the C 1s spectrum is decomposed into four components indexed to the characteristic peaks of C–C (284.7 eV), C–N (286.2 eV), C–O (287.5 eV), and CO (290.1 eV). , As defects, carbon–oxygen species are essential for ORR catalysis in alkaline media . The N 1s spectrum is divided into four subpeaks with binding energies of 398.7, 399.6, 401.2, and 404.1 eV, which correspond to pyridine N/Fe–N, pyrrole N, graphite N, and oxidized N, respectively (Figure c). , The N species have a crucial influence on the ORR activity, in which pyridine N and graphite N can provide more reaction sites and reduce the charge-transfer resistance, respectively .…”

“…As shown in Figure 4b, the C 1s spectrum is decomposed into four components indexed to the characteristic peaks of C−C (284.7 eV), C−N (286.2 eV), C−O (287.5 eV), and C�O (290.1 eV). 42,43 As defects, carbon−oxygen species are essential for ORR catalysis in alkaline media. 44 The N 1s spectrum is divided into four subpeaks with binding energies of 398.7, 399.6, 401.2, and 404.1 eV, which correspond to pyridine N/ Fe−N, pyrrole N, graphite N, and oxidized N, respectively (Figure 4c).…”

Immobilizing ultrasmall Pt nanocrystals on 3D interweaving BCN nanosheet-graphene networks enables efficient methanol oxidation reaction

“…[8][9][10] Therefore, the manufacture of highly active and long-lasting MOR catalysts has been regarded as urgent for the commercialization of DMFCs. [11][12][13] Although platinum (Pt) and its derivatives are considered to be superior MOR catalysts, their low natural abundance and high cost make their large-scale use a challenge. 14,15 Furthermore, metallic Pt with a d-band structure is prone to adsorbing CO-like by-products and suffering from serious toxic effects, thereby significantly shortening the long-term service life of DMFCs.…”

“…8–10 Therefore, the manufacture of highly active and long-lasting MOR catalysts has been regarded as urgent for the commercialization of DMFCs. 11–13…”