Nanoribbon Superstructures of Graphene Nanocages for Efficient Electrocatalytic Hydrogen Evolution

Abstract

Two-dimensional carbon architectures are attracting tremendous interests for various promising applications due to their outstanding electronic and mechanical properties, although it is a great challenge to rationally devise facile and operative methodologies to engineer their structural traits owing to complex synthetic processes. Herein, for the first time, we fabricate twodimensional carbon nanoribbons via direct thermal exfoliation of one-dimensional Ni-based metal−organic framework (MOF) nanorods, in which interconnected graphitic carbon nanocages are self-assembled into a belt-like superstructure with carbonencapsulated Ni nanoparticles immobilized on the surface. Due to the unparalleled structural superiority, the MOF-derived carbon nanobelts exhibit excellent catalytic performances in electrocatalytic hydrogen evolution. Importantly, the practical synthetic strategy may trigger the rapid development of carbon-based superstructures in many frontier fields.

One-Step Synthesis of Ultrathin Carbon Nanoribbons from Metal–Organic Framework Nanorods for Oxygen Reduction and Zinc–Air Batteries

“…Of course, 2D CNRibs with atomically thin and high aspect ratios can effectively shorten the diffusion length of electrolytes and accelerate the transport of mass, and thus improve their electrochemical performances. 29 The RRDE measurement was used for monitoring the yield of H 2 O 2 intermediates and surveying the ORR pathway of Fe-N/CNRib (Figure 4c). The H 2 O 2 yield is below 4% when the potential window is 0.2-1.0 V, corresponding to the electron transfer number larger than 3.9…”

Interface engineering and heterometal doping Mo-NiS/Ni(OH)2 for overall water splitting

“…Now, noble-metal-based electrocatalysts are applied as benchmark for water splitting because of high intrinsic activities. Pt-based materials have superior HER performance and Ir/Ru based materials specialize in OER [11][12][13]. However, high cost and insufficient reserves of noble-metal-based materials hamper their large-scale development.…”

NiSe2/FeSe2 heterostructured nanoparticles supported on rGO for efficient water electrolysis

“…Likewise, the minor peaks at 284.9 and 285.5 eV are mainly from CvO and C-O bonds, respectively. 35,36 To determine OER activities, a three-electrode system was utilized in 1 M KOH aqueous solution. For comparison, commercially available Ir/C was used.…”