Excellent Electrocatalytic Hydrogen Evolution Reaction Performances of Partially Graphitized Activated-Carbon Nanobundles Derived from Biomass Human Hair Wastes

Lee, Sejoon; Sim, Dae Hyun

doi:10.3390/nano12030531

Cited by 16 publications

(11 citation statements)

References 51 publications

(71 reference statements)

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“…On the other hand, the AC and pre-carbonized_C were characterized by using FESEM, EDX, and TEM analyses. The detailed results (Figures S11–S14) and discussion are provided in Supporting Information …”

Section: Resultsmentioning

confidence: 99%

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X-CoOTe (X = S, Se, and P) with Oxygen/Tellurium Dual Vacancies and Banana Stem Fiber-Derived Carbon Fiber as Battery-Type Cathode and Anode Materials for Asymmetric Supercapacitor

Sakthivel,

2024

ACS Appl. Mater. Interfaces

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In this work, we demonstrated the synthesis of anions (X = selenium (Se), sulfur (S), and phosphorus (P)) doped cobalt oxytelluride (X-CoOTe) with oxygen and tellurium dual vacancies using hydrothermal methods, followed by selenization, sulfurization, and phosphorization reactions. Especially, the Se-CoOTe-modified nickel foam (Se-CoOTe/NF) electrode delivered a higher specific capacity (752.95 C/g) and an extremely lower charge transfer resistance (0.87 Ω) than S-CoOTe/NF and P-CoOTe/ NF due to the higher metallic conductivity of Se. Both oxygen and tellurium vacancies facilitate higher charge transfer conductivity, specific capacity, and stability. On the other hand, banana stem core fiber-derived activated carbon fiber (AC) with exfoliated carbon sheet, cracked surface, and corresponding high surface area boosts the excellent cycle stability up to 4000 cycles with capacitance retention of 100.29%. Thus, the asymmetric device (Se-CoOTe/NF//AC/NF) exhibited an extendable cell voltage (1.55 V), higher energy density (155.6 W h kg −1 ) at a power density (1356.2 W kg −1 ), and generous long-term stability (100% retention up to 10 000 cycles) in a liquid alkaline electrolyte. In the practicability test, the proposed asymmetric device mutually showed an increased operating voltage from 1.55 to 4.65 V for a three-series connection. In a three-series connection, a single white LED and an LED string glowed efficiently. This new finding will be very useful to develop tellurium-based chalcogenides and biowaste-derived carbon for energy storage applications.

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Section: Resultsmentioning

confidence: 99%

“…The detailed results (Figures S11−S14) and discussion are provided in Supporting Information. 37 The XRD characterization was performed to understand the crystal nature of the prepared samples. 030) peak.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

X-CoOTe (X = S, Se, and P) with Oxygen/Tellurium Dual Vacancies and Banana Stem Fiber-Derived Carbon Fiber as Battery-Type Cathode and Anode Materials for Asymmetric Supercapacitor

Sakthivel,

2024

ACS Appl. Mater. Interfaces

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“…Catalytic properties of biowastes-derived electrocatalysts profoundly rely on parent biowastes' properties (e.g., the ratio of heteroatoms, porous structure) and pyrolysis conditions (e.g., atmosphere, temperature, and time) [66]. Moreover, a general method to optimize the nanostructure/porosity is chemical activation during the pyrolysis process [67], and commonly used activators include KOH, K 2 CO 3 , ZnCl 2 , H 3 PO 4 , etc. Starting from peanut shells, Saravanan et al developed multilayer carbon nanosheets for HER via a pyrolysis method.…”

Section: Pyrolysismentioning

confidence: 99%

“…Starting from human hairs, Sekar et al designed two carbon materials with different graphitization degrees (Fig. 5a) [67]. Compared with the amorphous carbon material (HH-AC-600) prepared at a lower temperature (600 °C), the catalyst synthesized at 700 °C (HH-AC-700) shows a partial graphitization feature.…”

Section: Waste-derived Carbon Catalysts For Hermentioning

confidence: 99%

Waste-Derived Catalysts for Water Electrolysis: Circular Economy-Driven Sustainable Green Hydrogen Energy

Chen

Yun

et al. 2022

Nano-Micro Lett.

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The sustainable production of green hydrogen via water electrolysis necessitates cost-effective electrocatalysts. By following the circular economy principle, the utilization of waste-derived catalysts significantly promotes the sustainable development of green hydrogen energy. Currently, diverse waste-derived catalysts have exhibited excellent catalytic performance toward hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water electrolysis (OWE). Herein, we systematically examine recent achievements in waste-derived electrocatalysts for water electrolysis. The general principles of water electrolysis and design principles of efficient electrocatalysts are discussed, followed by the illustration of current strategies for transforming wastes into electrocatalysts. Then, applications of waste-derived catalysts (i.e., carbon-based catalysts, transitional metal-based catalysts, and carbon-based heterostructure catalysts) in HER, OER, and OWE are reviewed successively. An emphasis is put on correlating the catalysts’ structure–performance relationship. Also, challenges and research directions in this booming field are finally highlighted. This review would provide useful insights into the design, synthesis, and applications of waste-derived electrocatalysts, and thus accelerate the development of the circular economy-driven green hydrogen energy scheme.

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“…For OER and HER, Ir/Ruand Pt-based materials were typically used as electrode materials because of their superior electrocatalytic performances [12][13][14][15]. However, the low natural abundance and the high cost of both novel metal and rare earth material would somewhat restrict their practical applications [16][17][18][19]. Meanwhile, it is well known that OER is less effective than HER because of its sluggish reaction kinetics and high energy consumption [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Excellent Bifunctional Water Electrolysis Activities of α-MoO3/AC Nanocomposites

Sekar,

Yun,

Park

et al. 2024

International Journal of Energy Research

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Electrocatalytic water splitting is a cost-effective and environment-friendly technique for producing oxygen and hydrogen through the oxygen/hydrogen evolution reaction (OER/HER). Developing the highly active and stable electrocatalyst, particularly for bifunctional water electrolysis (i.e., both OER and HER), is still a formidable challenge. Herein, we demonstrated the enhanced bifunctional water splitting activities by utilizing the molybdenum trioxide-anchored activated carbon (MoO3/AC) nanocomposites. The MoO3/AC samples were fabricated by the ultrasonication method using sol-gel synthesized MoO3 and biomass-derived AC, and they displayed a nanostreusel-like morphology with spherical MoO3 nanoparticle-decorated AC nanosheets. For the water electrolysis test, the MoO3/AC nanocomposites exhibited the excellent bifunctional electrocatalytic OER and HER performances with low overpotential and small Tafel slope values. Through analyzing the material characteristics and the electrochemical properties of MoO3/AC, it was found that the superb bifunctional OER-HER activities were attributed to the synergistic effects from the hybridization of highly conductive AC and electrochemically active α-MoO3. The results pronounce that the MoO3/AC nanocomposites possess an aptitude as a superb bifunctional OER/HER electrocatalyst for high-performance water electrolysis.

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Excellent Electrocatalytic Hydrogen Evolution Reaction Performances of Partially Graphitized Activated-Carbon Nanobundles Derived from Biomass Human Hair Wastes

Cited by 16 publications

References 51 publications

X-CoOTe (X = S, Se, and P) with Oxygen/Tellurium Dual Vacancies and Banana Stem Fiber-Derived Carbon Fiber as Battery-Type Cathode and Anode Materials for Asymmetric Supercapacitor

X-CoOTe (X = S, Se, and P) with Oxygen/Tellurium Dual Vacancies and Banana Stem Fiber-Derived Carbon Fiber as Battery-Type Cathode and Anode Materials for Asymmetric Supercapacitor

Waste-Derived Catalysts for Water Electrolysis: Circular Economy-Driven Sustainable Green Hydrogen Energy

Excellent Bifunctional Water Electrolysis Activities of α-MoO3/AC Nanocomposites

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