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Title: Atomically dispersed Pd electrocatalyst for efficient aqueous phase dechlorination reaction
Authors: Mao, Zhechuan
Liu, Linghui
Yang, Hong Bin
Zhang, Yangliang
Yao, Zeqing
Wu, Huan
Huang, Yanqiang
Xu, Yinghua
Liu, Bin
Keywords: Engineering::Chemical engineering
Issue Date: 2021
Source: Mao, Z., Liu, L., Yang, H. B., Zhang, Y., Yao, Z., Wu, H., Huang, Y., Xu, Y. & Liu, B. (2021). Atomically dispersed Pd electrocatalyst for efficient aqueous phase dechlorination reaction. Electrochimica Acta, 391, 138886-.
Project: RG10/16
Journal: Electrochimica Acta
Abstract: High atom utilization is important for practical application of Pd catalysts in dechlorination of chlorinated organic pollutants (COPs). Herein, we report atomically dispersed Pd (coordinated with 2 pyridinic N) anchored on N-doped carbon (A-Pd-NC) as an efficient catalyst toward electrochemical dechlorination of COPs in aqueous solution. Constant current electrolysis showed that the A-Pd-NC catalyst possessed a much higher dechlorination activity (DA, 98.9 mmol•g−1•h−1) than commercial Pd/C (2.4 mmol•g−1•h−1). Using A-Pd-NC as an effective electrocatalyst, near 100% product selectivity of 4-chlorophenol to phenol could be achieved at pH = 3. Constant potential electrolysis, cyclic voltammetry (CV), electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculation results suggested that the dechlorination stability of A-Pd-NC was dependent on the potential applied on the catalyst and the dechlorination reaction followed the hydrodechlorination mechanism with electrochemically adsorbed H as the reductant.
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2021.138886
Schools: School of Chemical and Biomedical Engineering 
School of Physical and Mathematical Sciences 
Rights: © 2021 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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