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

被引:3
|
作者
Pahra, Swapna [1 ,2 ]
Sangabathula, Omkar [3 ]
Sharma, Chandra S. [3 ]
Devi, Pooja [1 ]
机构
[1] CSIR Cent Sci Instruments Org, Mat Sci & Sensor Applicat, Chandigarh 160030, India
[2] Acad Sci & Innovat Res, Ghaziabad 201002, India
[3] Indian Inst Technol Hyderabad, Dept Chem Engn, Creat & Adv Res Based Nanomat CARBON Lab, Kandi 502285, Telangana, India
关键词
Water treatment; Carbon soot derived carbon; Hydrogen evolution reaction; Electrocatalyst; Waste water treatment; EFFICIENT BIFUNCTIONAL ELECTROCATALYSTS; OXYGEN EVOLUTION REACTION; HYDROGEN EVOLUTION; HIGHLY EFFICIENT; STAINLESS-STEEL; METHYLENE-BLUE; SURFACE-AREA; NICKEL FOAM; ELECTRODE; GRAPHENE;
D O I
10.1016/j.jpcs.2022.111106
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 inex-pensive 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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页数:9
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