Related Experiment Video
Updated: Sep 5, 2026

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems
Published on: May 26, 2019
Decoupling the Roles of Oxygen-Containing Functional Groups and Aromatic Carbon Clusters in the Reduction of
Zibo Xu1,2, Daniel C W Tsang1, Hussein O Badr3
1Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong852, China.
Abstract:
While carbon-based cathodes are widely used to mediate the electrochemical reduction of contaminants, the structural properties governing their rapid electron transfer remain poorly understood. Here, we decouple the roles of bulk conductivity and surface reactivity by quantifying the size of aromatic clusters and oxygen functional groups (OFGs) in biomass-derived cathodes. We demonstrate fundamental governing principles using tetrabromobenzene as the probe pollutant. We find that while increasing pyrolysis temperature drives the growth of aromatic clusters and increases dehalogenation performance (e.g., plateauing at 850 °C with a cluster size of ∼14 aromatic rings), these conductive networks are inert in the absence of OFGs. Introducing OFGs onto these clusters increases electron transfer efficiency by 50-85%, whereas selectively reducing these groups decreases activity by up to 75%. The optimized cathodes exhibit capacities that surpass those of commercial activated carbon and rival those of carbon black, providing a rational blueprint for designing high-efficiency carbon electrodes and enabling improved performance across a range of applications.
More Related Videos
09:17Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
Published on: January 30, 2015
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Related Concept Videos
Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism
Reactions at the Benzylic Position: Oxidation and Reduction
Acid Halides to Alcohols: LiAlH4 Reduction
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Protecting Groups for Aldehydes and Ketones: Introduction