Hierarchical Porous Activated Carbon from Wheat Bran Agro-Waste: Applications in Carbon Dioxide Capture, Dye Removal, Oxygen and Hydrogen Evolution Reactions

Koli, Amruta; Kumar, Abhishek; Pattanshetti, Akshata; Supale, Amit; Garadkar, Kalyanrao; Shen, Jian; Shaikh, Jasmin; Praserthdam, Supareak; Motkuri, Radha Kishan; Sabale, Sandip

doi:10.1002/cplu.202300373

Title: Hierarchical Porous Activated Carbon from Wheat Bran Agro-Waste: Applications in Carbon Dioxide Capture, Dye Removal, Oxygen and Hydrogen Evolution Reactions

Journal Article · 31 October 2023 · ChemPlusChem

DOI: https://doi.org/10.1002/cplu.202300373 · OSTI ID:2331462

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Jaysingpur College, Jaysingpur (India)
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Dr. Patangrao Kadam Mahavidhyalaya College, Sangli (India)
Shivaji University, Kolhapur (India)
Xiangtan University, Xiangtan (China)
Chulalongkorn University, Bangkok (Thailand)

Here this work reports an efficient method for facile synthesis of hierarchically porous carbon (WB-AC) utilizing wheat bran waste. Obtained carbon showed 2.47 mmol g^-1 CO₂ capture capacity with good CO₂/N₂ selectivity and 27.35 to 29.90 kJ mol^-1 isosteric heat of adsorption. Rapid removal of MO dye was observed with a capacity of ~555 mg g^-1. Moreover, WB-AC demonstrated a good OER activity with 0.35 V low overpotential at 5 mA cm^-2 and a Tafel slope of 115 mV dec^-1. It also exhibited high electrocatalytic HER activity with 57 mV overpotential at 10 mA cm^-2 and a Tafel slope of 82.6 mV dec^-1. The large SSA (757 m² g^-1) and total pore volume (0.3696 cm³ g^-1) result from N₂ activation contributing to selective CO₂ uptake, high and rapid dye removal capacity and superior electrochemical activity (OER/HER), suggesting the use of WB-AC as cost effective adsorbent and metal free electrocatalyst.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE; Department of Science and Technology; Department of Biotechnology, New Delhi

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 2331462

Report Number(s):: PNNL-SA--183989

Journal Information:: ChemPlusChem, Journal Name: ChemPlusChem Journal Issue: 3 Vol. 89; ISSN 2192-6506

Publisher:: ChemPubSoc EuropeCopyright Statement

Country of Publication:: United States

Language:: English

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