Bio-derived nanoporous activated carbon sheets as electrocatalyst for enhanced electrochemical water splitting

Prabu, N.; Kesavan, Thangaian; Maduraiveeran, Govindhan; Sasidharan, Manickam

doi:10.1016/j.ijhydene.2019.06.016

Cited by 41 publications

(27 citation statements)

References 68 publications

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“…The current global-energy crisis has provoked researchers to investigate alternative energy storage and conversion systems that should be environmentally benign, inexpensive and highly efficient [1]. The electrochemical oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are pivotal to next-generation energy production, storage and conversion systems, include water splitting [2,3] fuel cells [4][5][6][7][8] and metal-air batteries [9][10][11]. In this regard, it is essential to develop novel electrocatalysts applicable to ORRs, OERs and HERs with the desired catalytic properties, such as more abundance, higher efficiency, long-term durability and eco-friendliness [12,13].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Porous Carbon Derived from Biomass Used as Trifunctional Electrocatalyst toward Oxygen Reduction, Oxygen Evolution and Hydrogen Evolution Reactions

et al. 2019

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Tremendous developments in energy storage and conversion technologies urges researchers to develop inexpensive, greatly efficient, durable and metal-free electrocatalysts for tri-functional electrochemical reactions, namely oxygen reduction reactions (ORRs), oxygen evolution reactions (OERs) and hydrogen evolution reactions (HERs). In these regards, this present study focuses upon the synthesis of porous carbon (PC) or N-doped porous carbon (N-PC) acquired from golden shower pods biomass (GSB) via solvent-free synthesis. Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies confirmed the doping of nitrogen in N-PC. In addition, morphological analysis via field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) provide evidence of the sheet-like porous structure of N-PC. ORR results from N-PC show the four-electron pathway (average n = 3.6) for ORRs with a Tafel slope of 86 mV dec−1 and a half-wave potential of 0.76 V. For OERs and HERs, N-PC@Ni shows better overpotential values of 314 and 179 mV at 10 mA cm−2, and its corresponding Tafel slopes are 132 and 98 mV dec−1, respectively. The chronopotentiometry curve of N-PC@Ni reveals better stability toward OER and HER at 50 mA cm−2 for 8 h. These consequences provide new pathways to fabricate efficient electrocatalysts of metal-free heteroatom-doped porous carbon from bio-waste/biomass for energy application in water splitting and metal air batteries.

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Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Porous Carbon Derived from Biomass Used as Trifunctional Electrocatalyst toward Oxygen Reduction, Oxygen Evolution and Hydrogen Evolution Reactions

et al. 2019

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“…To get the biomass-derived activated carbon, the product of pyrolysis was washed with 1 M HCl solution, MilliQ water, and dried overnight (70 °C) [ 92 ]. A similar procedure was applied to obtain nanoporous activated carbon sheets that were synthesized from food waste that was high in carbohydrates [ 93 ]. Briefly, the food waste material was ground and the resulting powder was heated at 450 °C for 2 h under an inert atmosphere of nitrogen.…”

Section: Synthesis Of Carbon-based Nanocompositesmentioning

confidence: 99%

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

et al. 2021

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This review paper presents the most recent research progress on carbon-based composite electrocatalysts for the oxygen evolution reaction (OER), which are of interest for application in low temperature water electrolyzers for hydrogen production. The reviewed materials are primarily investigated as active and stable replacements aimed at lowering the cost of the metal electrocatalysts in liquid alkaline electrolyzers as well as potential electrocatalysts for an emerging technology like alkaline exchange membrane (AEM) electrolyzers. Low temperature electrolyzer technologies are first briefly introduced and the challenges thereof are presented. The non-carbon electrocatalysts are briefly overviewed, with an emphasis on the modes of action of different active phases. The main part of the review focuses on the role of carbon–metal compound active phase interfaces with an emphasis on the synergistic and additive effects. The procedures of carbon oxidative pretreatment and an overview of metal-free carbon catalysts for OER are presented. Then, the successful synthesis protocols of composite materials are presented with a discussion on the specific catalytic activity of carbon composites with metal hydroxides/oxyhydroxides/oxides, chalcogenides, nitrides and phosphides. Finally, a summary and outlook on carbon-based composites for low temperature water electrolysis are presented.

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“…To realize future green and clean hydrogen energy technology, therefore, developing the low-cost and highly efficient HER electrocatalyst is essential. In recent years, various carbonaceous materials (e.g., graphene [ 11 , 12 ], activated carbon [ 13 , 14 , 15 , 16 ], graphene oxide [ 17 ], carbon nanotube [ 18 , 19 , 20 , 21 ], graphitic carbon [ 22 ], porous carbon [ 23 , 24 ], carbon fiber [ 25 ], etc.) have been studied in order to find an appropriate HER electrocatalyst that can replace the Pt alloys [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Saravanan et al [ 14 ] synthesized the AC nanosheets from peanut shells through the KOH activation, and they achieved an over potential of 80 mV at 10 mA/cm 2 and a Tafel slope of 75 mV/dec. Prabu et al [ 15 ] used the Ooty Varkey food wastes to derive the nanoporous AC sheets, possessing a good HER activity with a low overpotential of 380 mV at 10 mA/cm 2 and a Tafel slope of 85 mV/dec. In addition, Liu et al [ 24 ] prepared the N- and S-codoped porous carbon nanosheets by using human hair through the ZnCl 2 activation at nitrogen atmosphere, and the nanosheets showed the outstanding HER characteristics with a low overpotential of 12 mV and a Tafel slope of 57.4 mV/dec at 10 mA/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

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

Lee

Sim

2022

Nanomaterials

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Carbonaceous materials play a vital role as an appropriate catalyst for electrocatalytic hydrogen production. Aiming at realizing the highly efficient hydrogen evolution reaction (HER), the partially graphitized activated-carbon nanobundles were synthesized as a high-performance HER electrocatalyst by using biomass human hair ashes through the high-temperature KOH activation at two different temperatures of 600 and 700 °C. Due to the partial graphitization, the 700 °C KOH-activated partially graphitized activated-carbon nanobundles exhibited higher electrical conductivity as well as higher textural porosity than those of the amorphous activated-carbon nanobundles that had been prepared by the KOH activation at 600 °C. As a consequence, the 700 °C-activated partially graphitized activated-carbon nanobundles showed the extraordinarily high HER activity with the very low overpotential (≈16 mV at 10 mA/cm2 in 0.5 M H2SO4) and the small Tafel slope (≈51 mV/dec). These results suggest that the human hair-derived partially graphitized activated-carbon nanobundles can be effectively utilized as a high-performance HER electrocatalyst in future hydrogen-energy technology.

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Bio-derived nanoporous activated carbon sheets as electrocatalyst for enhanced electrochemical water splitting

Cited by 41 publications

References 68 publications

Nitrogen-Doped Porous Carbon Derived from Biomass Used as Trifunctional Electrocatalyst toward Oxygen Reduction, Oxygen Evolution and Hydrogen Evolution Reactions

Nitrogen-Doped Porous Carbon Derived from Biomass Used as Trifunctional Electrocatalyst toward Oxygen Reduction, Oxygen Evolution and Hydrogen Evolution Reactions

Carbon-Based Composites as Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

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

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