A noble metal-free candle soot derived carbon electrocatalyst for simultaneous H2 generation and wastewater treatment

Sharma, Chandra Shekhar (2023) A noble metal-free candle soot derived carbon electrocatalyst for simultaneous H2 generation and wastewater treatment. Journal of Physics and Chemistry of Solids, 173. p. 111106. ISSN 0022-3697

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Electrocatalytic water splitting to produce green hydrogen is a promising approach for clean energy generation. However, the commercial aspect of this approach is limited due to catalysts cost and feedstock. Thus design of an inexpensive and noble metal-free (Pt, Rh, Ir etc.) catalyst is desirable. Moreover, wastewater as a feedstock for hydrogen generation is not explored to its full potential for green hydrogen generation, which otherwise is also a problem to be managed especially in developing countries. In the present work, we have investigated an inexpensive catalyst i.e. candle soot-derived carbon as an electrocatalyst for H2 generation from textile wastewater utilizing methylene blue as a model pollutant. The carbon catalyst is synthesized from the candle soot and is characterized for its structural and morphological properties. Carbon soot coated onto the nickel foam (CS@NF) proves as an efficient hydrogen evolution catalyst due to its excellent electrical conductivity and large active surface area. CS2.5@NF (with the loading of 2.5 mg cm−2) shows an overpotential and Tafel slope of 117 mV and 43.85 mV/dec, respectively in an acidic medium containing textile pollutants. Under optimal condition, ∼62% degradation is achieved within ∼90 min, along with the stable hydrogen production of ∼0.158 mmol per hour. These preliminary findings demonstrate the potential usage of an inexpensive non-noble metal free catalyst for simultaneous wastewater treatment as well as hydrogen generation.

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IITH Creators:
IITH CreatorsORCiD
Sharma, Chandra Shekharhttps://orcid.org/0000-0003-3821-1471
Item Type: Article
Uncontrolled Keywords: Carbon soot derived carbon; Electrocatalyst; Hydrogen evolution reaction; Waste water treatment; Water treatment; Carbon soot; Carbon soot derived carbon; Derived carbons; Electrocatalytic; Hydrogen evolution reactions; Hydrogen generations; Metal free; Waste-water treatment; Water splitting; ]+ catalyst; Aromatic compounds; Carbon; Developing countries; Feedstocks; Foams; Hydrogen production; Precious metals; Soot; Textiles; Wastewater treatment; Water pollution; Electrocatalysts
Subjects: Chemical Engineering
Chemical Engineering > Technology of industrial chemicals
Chemical Engineering > Organic products
Divisions: Department of Chemical Engineering
Depositing User: Mr Nigam Prasad Bisoyi
Date Deposited: 22 Aug 2023 05:27
Last Modified: 22 Aug 2023 05:27
URI: http://raiith.iith.ac.in/id/eprint/11584
Publisher URL: https://doi.org/10.1016/j.jpcs.2022.111106
OA policy: https://v2.sherpa.ac.uk/id/publication/12837
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