Synergy of zero-dimensional carbon dots decoration on the one-dimensional architecture of Ag-doped V2O5 for supercapacitor and overall water-splitting applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F24%3AA2502NLF" target="_blank" >RIV/61988987:17310/24:A2502NLF - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0016236123033197?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016236123033197?via%3Dihub</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Synergy of zero-dimensional carbon dots decoration on the one-dimensional architecture of Ag-doped V2O5 for supercapacitor and overall water-splitting applications

Popis výsledku v původním jazyce

The production of renewable energy sources and energy storage devices is crucial in addressing current global energy challenges. Hydrogen energy is a clean form of energy that can be produced without any harmful byproducts. For this purpose, nanorods of vanadium oxide (V2O5) and silver-doped vanadium oxide (Ag/V2O5) were synthesized by hydrothermal route. The carbon dots decorated silver doped vanadium oxide (Ag/V2O5@C) was fabricated using an ultrasonication approach. Various physio-chemical techniques were used to characterize the fabricated samples. The synthesized materials were employed as electrodes and electrocatalysts for supercapacitor and water-splitting applications. Cyclic voltammetry and cyclic charge-discharge experiments were performed, and results showed that Ag/V2O5@C exhibited 936 Fg(-1) specific capacitance at 5 mVs(-1) and 977 s discharge time. The charge transfer resistance was calculated via electrochemical impedance spectroscopy and Ag/V2O5@C showed a lower charge transfer resistance than other prepared materials. At 10 mAcm(-2), Ag/V2O5@C exhibited lower overpotential of 126 mV and 388 mV for hydrogen evolution (HER) and oxygen evolution reactions (OER) respectively. The lower tafel slope of 81 mV dec(-1) and 71 mV dec(-1) was attributed to the Ag/V2O5@C for HER and OER respectively. Ag/V2O5@C showed higher reaction kinetics due to the fast rate of charge transfer, low resistance, high conductivity, and greater active sites provided by the carbon dots for electrocatalytic reaction. So, Ag/V2O5@C can be employed as an effective electrocatalyst and electrode material for electrochemical applications.

Název v anglickém jazyce

Synergy of zero-dimensional carbon dots decoration on the one-dimensional architecture of Ag-doped V2O5 for supercapacitor and overall water-splitting applications

Popis výsledku anglicky

The production of renewable energy sources and energy storage devices is crucial in addressing current global energy challenges. Hydrogen energy is a clean form of energy that can be produced without any harmful byproducts. For this purpose, nanorods of vanadium oxide (V2O5) and silver-doped vanadium oxide (Ag/V2O5) were synthesized by hydrothermal route. The carbon dots decorated silver doped vanadium oxide (Ag/V2O5@C) was fabricated using an ultrasonication approach. Various physio-chemical techniques were used to characterize the fabricated samples. The synthesized materials were employed as electrodes and electrocatalysts for supercapacitor and water-splitting applications. Cyclic voltammetry and cyclic charge-discharge experiments were performed, and results showed that Ag/V2O5@C exhibited 936 Fg(-1) specific capacitance at 5 mVs(-1) and 977 s discharge time. The charge transfer resistance was calculated via electrochemical impedance spectroscopy and Ag/V2O5@C showed a lower charge transfer resistance than other prepared materials. At 10 mAcm(-2), Ag/V2O5@C exhibited lower overpotential of 126 mV and 388 mV for hydrogen evolution (HER) and oxygen evolution reactions (OER) respectively. The lower tafel slope of 81 mV dec(-1) and 71 mV dec(-1) was attributed to the Ag/V2O5@C for HER and OER respectively. Ag/V2O5@C showed higher reaction kinetics due to the fast rate of charge transfer, low resistance, high conductivity, and greater active sites provided by the carbon dots for electrocatalytic reaction. So, Ag/V2O5@C can be employed as an effective electrocatalyst and electrode material for electrochemical applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

FUEL

ISSN

0016-2361

e-ISSN

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Svazek periodika

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Číslo periodika v rámci svazku

10.2.2024

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

001153516900001

EID výsledku v databázi Scopus

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