Journal ArticleDOI
Electrocatalytic methanol oxidation over Cu, Ni and bimetallic Cu-Ni nanoparticles supported on graphitic carbon nitride
Izabela S. Pieta,Anuj K. Rathi,Piotr Pieta,Robert Nowakowski,Marcin Holdynski,Marcin Pisarek,Agnieszka Kamińska,Manoj B. Gawande,Radek Zboril +8 more
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TLDR
In this paper, a hierarchical hetero-structures dropcasted on carbon nitride (C3N4) anodes have been visualised by SEM and their catalytic performance have been examined in methanol electrooxidation reaction (MOR) under alkaline conditions.Abstract:
Ni, Cu and Cu–Ni nanostructures have been fabricated and homogeneously embedded on ultrathin two-dimensional (2D) carbon nitride (g-C3N4), and the surface morphology and composition of the resulting hybrid nanostructures were studied by XRD, TEM, HRTEM-elemental mapping, Raman spectroscopy and XPS. The new hierarchical hetero-structures dropcasted on GC anodes have been visualised by SEM and their catalytic performance have been examined in methanol electrooxidation reaction (MOR) under alkaline conditions. Nanosized Ni particles dispersed finely over g-C3N4 are very active electrocatalysts with MOR onset at potential 0.35 V and charge transfer resistance 0.12 kΩ. The stability of modyfied GC electrodes, examined under chronoamperometric conditions showed that for electrode loading with 4% (wt. %) of NiO the stable current density ca. 36 A g−1 (12 A cm2) was obtained during whole experiment (up to 160 min). For all catalyst studied the curent density obtained during MOR reaction was enhanced when electrode was iluminated by UV light λ∼400 nm, and the highest value were obtained for 4% Ni/CN catalyst ca. 127 A g−1 (22 A cm2). The Cu incorporation in the hybrid material evoke loss of activity mostly due to Cu+ irreversible reduction/oxidation to Cu° and Cu2+, CuO segregation and influencing electron transfer process which results in the increasing in the redox potential. These results represent an important step towards light-enhanced electro-reactive systems and sensors in which heterojunction formation can facilitate electron-hole separation and enable more efficient energy transfer.read more
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Recent development of covalent organic frameworks (COFs): synthesis and catalytic (organic-electro-photo) applications
Rakesh Kumar Sharma,Priya Yadav,Manavi Yadav,Radhika Gupta,Pooja Rana,Anju Srivastava,Radek Zbořil,Rajender S. Varma,Markus Antonietti,Manoj B. Gawande +9 more
TL;DR: In this article, a review summarizes selected and most recent espoused synthetic methodologies for their assembly including the formation of magnetic COFs and potential insights in the field of catalysis; electrocatalysis; and photocatalysis where COFs can serve as excellent platforms for supporting catalytic species, are also illustrated.
Journal ArticleDOI
Hierarchical nanocomposite electrocatalyst of bimetallic zeolitic imidazolate framework and MoS2 sheets for non-Pt methanol oxidation and water splitting
TL;DR: In this article, a nanocomposite composed of a bimetallic CoNi-zeolitic imidazole framework embedded by MoS2 nanosheets (MoS2@CoNi-ZIF), as a bifunctional electrocatalyst for non-Pt methanol oxidation reaction (MOR) and overall water splitting in an alkaline solution was explored.
Journal ArticleDOI
High-Performance Bismuth-Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction.
Amare Aregahegn Dubale,Yuanyuan Zheng,Honglei Wang,René Hübner,Yi Li,Jing Yang,Jiangwei Zhang,Navpreet K. Sethi,Lan-Qi He,Zhikun Zheng,Wei Liu +10 more
TL;DR: The ensemble of the special electronic structure of Ni 97 Bi 3 and the unique three-dimensional porous morphology of aerogel endow the electrocatalyst with abundant active sites, efficient electron and mass transfer, low CO poisoning, and correspondingly outstanding comprehensive performance towards methanol oxidation.
Journal ArticleDOI
In situ facile fabrication of Ni(OH)2 nanosheet arrays for electrocatalytic co-production of formate and hydrogen from methanol in alkaline solution
TL;DR: Ni(OH)2 nanosheet arrays are in situ prepared on Ni foam through very straightforward ultrasonication in HCl solution and the following rinsing and drying procedures as mentioned in this paper.
References
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