Chirally modified cobalt-vanadate grafted on battery waste derived layered reduced graphene oxide for enantioselective photooxidation of 2-naphthol: Asymmetric induction through non-covalent interaction

Baruah, Manash J.; Bora, Tonmoy J.; Gogoi, Gautam; Hoque, Nazimul; Gour, Nand Kishor; Bhargava, Suresh K.; Guha, Ankur Kanti; Nath, Jayashree; Das, Biraj; Bania, Kusum K.

doi:10.1016/j.jcis.2021.10.091

Cited by 12 publications

(9 citation statements)

References 82 publications

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“…The rGO used herein was derived from battery waste synthesized using the modified Hammers method as previously reported by our group. 41 The Ni(OH) 2 -supported rGO was then treated with 50 mL of stock solution of rhodium, and the mixture was refluxed at 100 °C for 48 h. The black precipitate so obtained was dried, filtered, and washed with warm water to remove the Cl − ions. The complete removal of Cl − ions was confirmed by the AgNO 3 test.…”

Section: Introductionmentioning

confidence: 99%

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Hoque

Baruah

Biman

et al. 2022

ACS Appl. Energy Mater.

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Two hybrid electrocatalysts formulated as Rh/RhO x -Ni(OH)2-rGO and Rh/RhO x -Ni(OH)2-Y/rGO were synthesized using zeolite-Y and reduced graphene oxide (rGO) as solid support and hard templating agents. The hybrid composites served as effective electrocatalysts for the electrochemical oxidation of both methanol and ethanol. X-ray photoelectron spectroscopic analysis predicted for the creation of metallic rhodium, Rh(0), sites that helped in reducing the CO poisoning during electrocatalytic decomposition of the C1 and C2 alcohols. The zeolite-Y-embedded electrocatalyst, Rh/RhO x -Ni(OH)2-Y/rGO, showed high CO tolerance in comparison to Rh/RhO x -Ni(OH)2-rGO and Pt/C. This was further evident from the CO stripping experiment. The zeolite-Y matrix was found to have significant impact in enhancing the current density and durability of the electrocatalysts in both methanol and ethanol oxidation reaction (MOR and EOR) by stabilizing the low valent Rh species. The maximum current density in the case of MOR was found to be 5.6 A/mg, while that in the case of EOR was found to be 7.1 A/mg. The zeolite-Y-supported electrocatalyst exhibited stability up to 1000 cycles, which was retained for 13.8 h during MOR/EOR without any significant loss in the current density. The creation of mesoporous channels in zeolite-Y after its post-modification helped in high mass transfer and allowed to follow a diffusion-controlled mechanism. The linear relationship between current density and the square root of the scan rate also suggested a diffusion-controlled process. The catalysts also exhibited good methanol and ethanol tolerance with the maximum concentration up to 4 and 3 M, respectively.

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Section: Introductionmentioning

confidence: 99%

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Hoque

Baruah

Biman

et al. 2022

ACS Appl. Energy Mater.

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“…The appearance of a weak satellite structure in both the XPS spectra centered at the high binding energy sites of Co 2p 3/2 and Co 2p 1/2 signals provided the evidence that both Co(II) and Co(III) sites were present in the Co 3 O 4 spinel structure in both materials. The presence of Co 3 O 4 in the synthesized electrocatalyst was confirmed by the Co (2p) spectrum that was concurrent with the Co 3 O 4 XPS spectrum . The XPS spectra of O 1s for both the materials are shown in Figure e,f.…”

Section: Resultsmentioning

confidence: 56%

“…Co 3 O 4 and Ni(OH) 2 were also prepared individually according to the procedure that was previously reported by our group to observe the methanol oxidation reaction. , The MOR of the synthesized materials was studied in 1 M KOH solution. The CVs of Co 3 O 4 and Ni(OH) 2 are shown in Figure S6a,b, respectively.…”

Section: Electrochemical Methanol Oxidationmentioning

confidence: 99%

Tubular Nickel Hydroxide Embedded in Zeolitic Cobalt Oxide for Methanol Oxidation Reaction

Khanam

Hoque

Lee

et al. 2022

ACS Appl. Energy Mater.

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Non-noble metal-based electrocatalysts have been designed for effective electrochemical oxidation of methanol in basic medium. The catalyst consisting of nickel (Ni) and cobalt (Co) metals was synthesized with a zeolitic imidazolate framework (ZIF) template approach. Such a method leads to the decoration of cylindrically shaped nickel hydroxides, Ni(OH)2, in nanodimensions within the zeolitic crystals of spinel cobalt oxides, Co3O4. The mixed metal hydroxide and oxide, Ni(OH)2-Co3O4, represented good activity toward electrochemical oxidation of methanol in 1 M KOH at a low onset potential. When combined with a carboxylate-functionalized multiwalled carbon nanotube (COOH-MWCNT), the same material, Ni(OH)2-Co3O4, exhibited superior MOR (methanol oxidation reaction) activity, giving a peak current density of 4.2 Amg–1 at similar conditions. The MWCNT-modified catalyst, Ni(OH)2-Co3O4-MWCNT, also showed high stability up to 500 cycles and 25000 s without a significant loss in the current density. The linear dependency of the current density against the square root of the scan rate indicated a diffusion-controlled MOR process. The decrease in onset potential with increasing scan rate also predicted a kinetically favorable MOR process. Fourier transform infrared and Raman analyses suggested that the MOR mechanism proceeded through the adsorption of methanol (CH3OH) on the catalyst surface, and its deprotonation formed the methoxide ion (CH3O–) which in the later course decomposed to CO2 and H2O. The Raman study also showed that, during the electrochemical oxidation process, Co2+ species in Co3O4 transformed to CoOOH and thereby favored the MOR.

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“…The Co 3 O 4 -V 2 O 5 material prepared previously by our group was used for the comparative study. 49…”

Section: Preparation Of Comentioning

confidence: 99%

“…The artificial photocatalytic reaction was performed in a photoreactor as mentioned in our previous study. 49…”

Section: Materials Advances Papermentioning

confidence: 99%

Cobalt oxide decked with inorganic-sulfur containing vanadium oxide for chromium(vi) reduction and UV-light-assisted methyl orange degradation

Saikia,

Khanam

et al. 2023

Mater. Adv.

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Chirally modified cobalt-vanadate grafted on battery waste derived layered reduced graphene oxide for enantioselective photooxidation of 2-naphthol: Asymmetric induction through non-covalent interaction

Cited by 12 publications

References 82 publications

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Impregnating Rhodium(0) Sites through Zeolite-Y Templation in a Hybrid Rh–Ni Catalyst for Alcohol Electro-Oxidation with Low CO Poisoning

Tubular Nickel Hydroxide Embedded in Zeolitic Cobalt Oxide for Methanol Oxidation Reaction

Cobalt oxide decked with inorganic-sulfur containing vanadium oxide for chromium(vi) reduction and UV-light-assisted methyl orange degradation

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