Electrocatalyst for oxygen evolution reaction and methanol oxidation using surface-oriented stable NiSnO3 nanospheres anchored g-C3N4 nanosheets

Sundararaj, Sathiya Bama; Tamilarasan, Saravanakumar; Kadirvelu, K.; Selvaraju, T.

doi:10.1016/j.apsusc.2022.155785

Cited by 12 publications

(8 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, the effective dispersion of Ni 0.5 Cu 0.5 Fe 2 O 4 nanocomposites on the SCN nanosheets would be the source for the increased surface area. Moreover, the Ni 0.5 Cu 0.5 Fe 2 O 4 @SCN nanocomposite shows a large average pore volume of 0.189 cm 3 /g, which effectively allows the substrate to the active sites and/or electrolyte, resulting in rapid bleaching of the MB dye and in effective OER. − …”

Section: Resultsmentioning

confidence: 99%

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Sundararaj

Selvaraju

2023

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

In consideration of energy conversion and/or environmental protection, it is important to develop electrocatalytic and/or photocatalytic active materials for the oxygen evolution reaction (OER) and photodegradation of methylene blue (MB), respectively. To meet these requirements, mixed spinel ferrites such as Ni x Cu1–x Fe2O4 anchored at sulfur-doped graphitic carbon nitride (SCN) nanosheets was developed for the first time via a simple one-pot hydrothermal method for the construction of a novel bifunctional Ni x Cu1–x Fe2O4@SCN nanocomposite. Initially, the crystal structure, optical properties, surface morphology, elemental composition, and surface area of different nanocomposites, such as NiFe2O4, Ni0.8Cu0.2Fe2O4, Ni0.5Cu0.5Fe2O4, Ni0.2Cu0.8Fe2O4, SCN, and Ni0.5Cu0.5Fe2O4@SCN, were studied through XRD, UV-DRS analysis, FT-IR, FE-SEM with EDX, HR-TEM, and BET analysis. Furthermore, when compared to other prepared electrode nanocomposites such as spinel ferrites or different proportion mixed spinel ferrites, the Ni0.5Cu0.5Fe2O4@SCN nanocomposite loaded 316 SSL mesh electrode demonstrated exceptional electrocatalytic oxygen evolution performance with a very low overpotential of 250 mV at 10 mA cm–2 current density and outstanding stability. Subsequently, the photocatalytic activities of the prepared mixed spinel ferrites, Ni x Cu1–x Fe2O4@SCN nanocomposites, were tested through the degradation of MB under visible-light irradiation. Among the prepared photocatalysts, Ni0.5Cu0.5Fe2O4@SCN nanocomposite showed superior photocatalytic MB degradation under visible light, which is firmly due to the equi-proportion blending of Cu+2 substitutions in mixed spinel ferrites at SCN. Accordingly, the Ni0.5Cu0.5Fe2O4@SCN nanocomposite shows excellent photocatalytic degradation (POD) efficiency of 99.1% for MB in 40 min, while other nanocomposites such as NiFe2O4, SCN, and Ni0.5Cu0.5Fe2O4 show 40.2, 42.5, and 91.2% degradation efficiencies, respectively. Thus, the Ni0.5Cu0.5Fe2O4@SCN nanocomposite could be a promising material for electrocatalytic OER and/or photocatalytic degradation of MB under visible-light irradiation.

show abstract

Section: Resultsmentioning

confidence: 99%

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Sundararaj

Selvaraju

2023

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…We estimated the PECSA using ECSA = C dl /C S to discover how many possible catalyst sites support PEC water splitting. As described in the existing data, 44 C s equals the specific capacitance of the electrolyte (40 F cm −2 ). The CV curves of g-CN nanosheets, CTO, and CTOCN-d nanohybrid electrodes in 1.0 M KOH at varied scan rates outside the Faradaic area are shown in Figure S9a− g. According to the observed C dl value, the CTOCN-d nanohybrid has a larger PECSA value than either pure g-CN nanosheets or CTO, indicating that the photoanode has more accessible active sites for PECs, resulting in increased PEC-HER activity.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Photoelectrochemical Water Splitting: A Visible-Light-Driven CoTiO₃@g-C₃N₄-Based Photoanode Interface Follows the Type II Heterojunction Scheme

Sundararaj,

Amir,

Viswanathan

et al. 2024

Langmuir

Self Cite

View full text Add to dashboard Cite

Harnessing solar energy can be efficiently used to generate hydrogen by photochemical water splitting, which is a sustainable and environmentally benign energy source. Here, a unique visible-light-driven CoTiO 3 @g-C 3 N 4 (CTOCN)-based photoanode interface has been optimized and developed with modification to follow the type II heterojunction for the enhancement of photoelectrochemical water splitting. Initially, a graphitic carbon nitride-loaded CoTiO 3 (with 10 wt % g-C 3 N 4 ) composite was obtained using a one-pot solvothermal method. Accordingly, the type II heterojunction interface between g-C 3 N 4 and CoTiO 3 has been successfully created and confirmed by the acquired phase, morphological, and optical examinations. Thereby, heterostructure generations with interfacial interaction were enabled to decrease photogenerated electron−hole pair recombination, leading to enhanced charge transfer for water oxidation kinetics. The minimal charge transfer resistance and hole relaxation lifetime (p) shown in Nyquist and Bode plots have further confirmed the rapid electron transport across the electrode/electrolyte interfaces, which is attributed to an enhanced absorption of holes for the water splitting process. Additionally, UV−vis spectroscopy, Mott−Schottky analysis, and UPS studies were used to determine the band edge locations of g-C 3 N 4 and CoTiO 3 . In comparison to previously developed nanohybrids and their equivalents, the CTOCN-d photoanode follows the type II charge transfer mechanism, resulting in a higher photocurrent density of 55.51 mA cm −2 .

show abstract

“…The catalyst poisoning originates with the formation of certain carbonaceous intermediates (CO ads , CH 3 O, CH 2 O, and CHO) . There has been an intense pursuit for electrocatalysts based on first-row 3 d metals to cater to the need of inexpensive yet efficient and light fuel-cell systems . In 2022, Feng and co-workers worked with a novel and efficient bifunctional catalyst of CoSe/N-doped carbon nanospheres with Pt nanoparticles as a support.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of Methanol and Ethanol with 3d-Metal Based Anodic Electrocatalysts in Alkaline Media Using Carbon Based Electrode Assembly

Tanwar,

Narjinari,

Sharma

et al. 2024

Inorg. Chem.

View full text Add to dashboard Cite

Homogeneous electrocatalytic systems based on readily available, earth-abundant, inexpensive base metals Ni, Co, and Cr have been formulated for the electro-oxidation of alcohols (methanol and ethanol) that constitute a key half-cell component of direct alcohol fuel cells (DAFCs). Notably, excellent results were obtained for both methanol as well as ethanol electrooxidation while operating with a half-cell assembly based on allnon-noble working and counter electrode systems consisting of glassy carbon and graphite rod, respectively. Using NaOH as the supporting electrolyte, Ni/Co/Cr metal salts and their bis-(iminopyridine) complexes have been used as anodic electrocatalysts for the alcohol half-cell reactions, and among them, catalytic systems based on Co outperformed the corresponding systems based on Ni and Cr. The system comprising CoCl 2 .•6H 2 O [10 mM] + NaOH [6 M] at room temperature emerged as the best electrocatalyst for both methanol [5 M] electro-oxidation (ca. 522.5 ± 13.5 mA cm −2 at 1.4 V) and ethanol [5 M] electro-oxidation (ca. 209 ± 25 mA cm −2 at 1.34 V). It was observed that regardless of the starting alcohol, the end product is carbon dioxide, all of which gets trapped as sodium carbonate (up to 97% yield), thereby mitigating any possible hazards of greenhouse gas emission. Inferences obtained from FETEM, FESEM, and EDS analysis of both the electrolyte solution and residues deposited on the electrode surface provide evidence for the mostly homogeneous nature of the reaction mixture with the molecular catalyst being the major contributor toward the electrocatalytic activity apart from the minor role played by trace heterogeneous particles. The current cell assembly operating with non-noble working and counter electrodes utilizing a catalytic system based on an earth-abundant, base metal salt/complex that not only results in good half-cell current densities for high-energy power-source DAFCs but also generates high-value sodium carbonate offers an exciting avenue.

show abstract

Electrocatalyst for oxygen evolution reaction and methanol oxidation using surface-oriented stable NiSnO3 nanospheres anchored g-C3N4 nanosheets

Cited by 12 publications

References 50 publications

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Photoelectrochemical Water Splitting: A Visible-Light-Driven CoTiO₃@g-C₃N₄-Based Photoanode Interface Follows the Type II Heterojunction Scheme

Electrocatalytic Oxidation of Methanol and Ethanol with 3d-Metal Based Anodic Electrocatalysts in Alkaline Media Using Carbon Based Electrode Assembly

Contact Info

Product

Resources

About

Electrocatalyst for oxygen evolution reaction and methanol oxidation using surface-oriented stable NiSnO3 nanospheres anchored g-C3N4 nanosheets

Cited by 12 publications

References 50 publications

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel NixCu1–xFe2O4 Nanocomposites Anchored at Sulfur-Doped g-C3N4

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel NixCu1–xFe2O4 Nanocomposites Anchored at Sulfur-Doped g-C3N4

Photoelectrochemical Water Splitting: A Visible-Light-Driven CoTiO3@g-C3N4-Based Photoanode Interface Follows the Type II Heterojunction Scheme

Electrocatalytic Oxidation of Methanol and Ethanol with 3d-Metal Based Anodic Electrocatalysts in Alkaline Media Using Carbon Based Electrode Assembly

Contact Info

Product

Resources

About

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Insights into the Electrocatalytic Oxygen Evolution Reaction and Photocatalytic Methylene Blue Degradation of Mixed Spinel Ni_xCu_1–xFe₂O₄ Nanocomposites Anchored at Sulfur-Doped g-C₃N₄

Photoelectrochemical Water Splitting: A Visible-Light-Driven CoTiO₃@g-C₃N₄-Based Photoanode Interface Follows the Type II Heterojunction Scheme