BCN–Co<sub>3</sub>O<sub>4</sub> hybrid – a highly efficient catalyst for the oxygen evolution reaction and dye degradation

Balakrishnan, Thiruparasakthi; Mohamed, Anis; Sridhar, Arun; Kumar, M. Praveen; kumar, Sakthivel Arun; Mayavan, Sundar

doi:10.1039/c6ra16058a

Cited by 23 publications

(12 citation statements)

References 25 publications

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“…However, there are few works focusing on the OER properties of BCNs. As far as we know, there is only one previous paper dealing with the synergetic use of Co 3 O 4 -BCN hybrid catalysts for the OER [12].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Transparent B–C–N Layers Grown on Titanium Substrates with Excellent Electrocatalytic Activity for the Oxygen Evolution Reaction

Jiménez-Arévalo

Leardini

Ferrer

et al. 2020

ACS Appl. Energy Mater.

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Ultrathin B-C-N layers grown on Ti substrates are investigated as efficient anodes for electrochemical water splitting. A fast and direct synthetic route has been used, based on plasma-enhanced chemical vapour deposition with Methylamine Borane as a singlesource molecular precursor. The effect of growth time on the morphological and structural properties and on the chemical composition of the layers has been investigated by scanning electron microscopy, Raman spectroscopy, x-ray photoelectron spectroscopy and transmission electron microscopy coupled with electron energy loss spectroscopy. Flat B-C-N layers on top of an amorphous titanium oxide layer present at the Ti surface have been obtained by using short growth times, while longer growth times give rise to core/ shell structures formed by vertical wall B-C-N layers and titanium carbonitride phases. The obtained layers present enhanced electrocatalytic activity for the oxygen evolution reaction in alkaline aqueous solutions. Moreover, owing to their ultrathin nature, the B-C-N layers preserve the photocurrents of the underlying titanium oxide layer, acting as transparent electrodes with

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Section: Introductionmentioning

confidence: 99%

Ultrathin Transparent B–C–N Layers Grown on Titanium Substrates with Excellent Electrocatalytic Activity for the Oxygen Evolution Reaction

Jiménez-Arévalo

Leardini

Ferrer

et al. 2020

ACS Appl. Energy Mater.

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Section: Resultsmentioning

confidence: 99%

“…[35] In this conversion process, the OER is rate determinant step and requires more energy. [41] Therefore, the development of OER catalysts is one of the most attractive areas for the sustainable energy cycle. [10,42,47] For sustainable energy conversion, the activity and stability of catalysts are crucial problems that need to be solved.…”

Section: Electrochemical Water Oxidationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[38] Nevertheless, there still needs to develop alternative approaches and attempts to design hybrid materials combining together individual advantages of constituents for OER in especially mild operatable neutral conditions and high organic pollutant degradation performance. [39][40][41][42] Previous studies have shown that doping of transition metal ions between MnO 2 layers in Birnessite structure increases redox activity in organic dyes degradation reactions. [42,43] However, the layered and amorphous structure of Birnessite reduces the number of active sites and the mass transfer rate.…”

Section: Introductionmentioning

confidence: 99%

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Cryptomelane nanorods coated with Ni ion doped Birnessite polymorphs as bifunctional efficient catalyst for the oxygen evolution reaction and degradation of organic contaminants

Gürbüz

Elmacı

Zhang

et al. 2021

Applied Organom Chemis

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The intelligent design or development of dual‐functional catalysts using non‐precious metals especially for the oxygen evolution reaction (OER) in sustainable energy systems and degradation of organic pollutants is still a difficult and a significant challenge. Furthermore, the development of these catalysts is of great importance in terms of energy security and solution of the environmental problems. To meet these requirements, herein, we describe the synthesis of a Ni‐ion doped Birnessite@Cryptomelane (Ni2+/B@Cr) hybrid structure as a bifunctional efficient catalyst for the OER in neutral media and degradation of dye pollutants. The Ni2+/B@Cr catalyst exhibited a sharp onset potential at 390 mV (vs. RHE) and achieved a current density of 1 mA cm−2 at a low ƞ of 430 mV with a Tafel slope of ~96 mV dec−1. The results of electrochemical impedance spectroscopy (EIS) studies indicated that Ni intercalation into birnessite layer and heterostructure of the hybrid electrocatalyst Ni2+/B@Cr increased the conductivity by lowering the resistance of charge transfer (Rct = 4.82 Ω) and oxygen evolution processes (ROER = 4.13 Ω). The durability assay identified Ni2+/B@Cr as stable electrocatalyst with 10% loss of activity after long‐term stability tests (10 h, under 500‐mV overpotential). In addition, the Ni2+/B@Cr achieved high (86.67 s−1 g−1) and rapid (173 s) catalytic performance for the reduction of methylene blue (MB). Overall, this paper presents a low‐cost production strategy for the design of highly efficient bifunctional catalysts, offering boosted electrocatalytic and degradation performance for water oxidation and organic dye contamination, respectively.

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Borocarbonitrides as Metal‐Free Catalysts for the Hydrogen Evolution Reaction

2018

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Hydrogen generation by water splitting is clearly a predominant and essential strategy to tackle the problems related to renewable energy. In this context, the discovery of proper catalysts for electrochemical and photochemical water splitting assumes great importance. There is also a serious intent to eliminate platinum and other noble metal catalysts. To replace Pt by a non‐metallic catalyst with desirable characteristics is a challenge. Borocarbonitrides, (BxCyNz) which constitutes a new class of 2D material, offer great promise as non‐metallic catalysts because of the easy tunability of bandgap, surface area, and other electronic properties with variation in composition. Recently, BxCyNz composites with excellent electrochemical and photochemical hydrogen generation activities have been found, especially noteworthy being the observation that BxCyNz with a carbon‐rich composition or its nanocomposites with MoS2 come close to Pt in electrocatalytic properties, showing equally good photochemical activity.

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BCN–Co₃O₄ hybrid – a highly efficient catalyst for the oxygen evolution reaction and dye degradation

Abstract: The as-prepared Co3O4–BCN shows excellent activity towards the OER and dye degradation as compared to pristine Co3O4.

Cited by 23 publications

References 25 publications

Ultrathin Transparent B–C–N Layers Grown on Titanium Substrates with Excellent Electrocatalytic Activity for the Oxygen Evolution Reaction

Ultrathin Transparent B–C–N Layers Grown on Titanium Substrates with Excellent Electrocatalytic Activity for the Oxygen Evolution Reaction

Cryptomelane nanorods coated with Ni ion doped Birnessite polymorphs as bifunctional efficient catalyst for the oxygen evolution reaction and degradation of organic contaminants

Borocarbonitrides as Metal‐Free Catalysts for the Hydrogen Evolution Reaction

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BCN–Co3O4 hybrid – a highly efficient catalyst for the oxygen evolution reaction and dye degradation

Abstract: The as-prepared Co3O4–BCN shows excellent activity towards the OER and dye degradation as compared to pristine Co3O4.

Cited by 23 publications

References 25 publications

Ultrathin Transparent B–C–N Layers Grown on Titanium Substrates with Excellent Electrocatalytic Activity for the Oxygen Evolution Reaction

Ultrathin Transparent B–C–N Layers Grown on Titanium Substrates with Excellent Electrocatalytic Activity for the Oxygen Evolution Reaction

Cryptomelane nanorods coated with Ni ion doped Birnessite polymorphs as bifunctional efficient catalyst for the oxygen evolution reaction and degradation of organic contaminants

Borocarbonitrides as Metal‐Free Catalysts for the Hydrogen Evolution Reaction

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BCN–Co₃O₄ hybrid – a highly efficient catalyst for the oxygen evolution reaction and dye degradation