PMID- 37920955
OWN - NLM
STAT- MEDLINE
DCOM- 20231115
LR  - 20231115
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 57
IP  - 45
DP  - 2023 Nov 14
TI  - Water Flow-Driven Coupling Process of Anodic Oxygen Evolution and Cathodic Oxygen 
      Activation for Water Decontamination and Prevention of Chlorinated Byproducts.
PG  - 17404-17414
LID - 10.1021/acs.est.3c02256 [doi]
AB  - Electrochemical advanced oxidation process (EAOP) is a promising technology for 
      decentralized water decontamination but is subject to parasitic anodic oxygen 
      evolution and formation of toxic chlorinated byproducts in the presence of Cl(-). 
      To address this issue, we developed a novel electrolytic process by water 
      flow-driven coupling of anodic oxygen evolution reaction (OER) and cathodic 
      molecular oxygen activation (MOA). When water flows from anode to cathode, O(2) 
      produced from OER is carried by water through convection, followed by being 
      activated by atomic hydrogen (H*) on Pd cathode to produce (*)OH. The water 
      flow-driven OER/MOA process enables the anode to be polarized at low potential 
      (1.7 V vs SHE) that is lower than that of conventional EAOP whose (*)OH is 
      produced from direct water oxidation (>2.3 V vs SHE). At a flow rate of 30 mL 
      min(-1), the process could achieve 94.8% removal of 2,4-dichlorophenol (2,4-DCP) 
      and 71.5% removal of chemical oxygen demand (COD) within 45 min at an anode 
      potential of 1.7 V vs SHE and cathode potential of -0.5 V vs SHE. To achieve the 
      comparable 2,4-DCP removal performance, 4.3-fold higher energy consumption was 
      needed for the conventional EAOP with titanium suboxide anode (anode potential of 
      2.9 V vs SHE), but current efficiency declined by 3.5 folds. Unlike conventional 
      EAOP, chlorate and perchlorate were not detected in the OER/MOA process, because 
      low anode potential <2.0 V vs SHE was thermodynamically unfavorable for the 
      formation of chlorinated byproducts by anodic oxidation, indicated by theoretical 
      calculations and experimental data. This study provides a proof-in-concept 
      demonstration of water flow-driven OER/MOA process, representing a paradigm shift 
      of electrochemical technology for water decontamination and prevention of 
      chlorinated byproducts, making electrochemical water decontamination more 
      efficient, more economic, and more sustainable.
FAU - Wei, Rui
AU  - Wei R
AD  - State Key Laboratory of Urban Water Resource and Environment, School of 
      Environment, Harbin Institute of Technology, Harbin 150090, China.
FAU - Pei, Shuzhao
AU  - Pei S
AUID- ORCID: 0000-0001-5813-6857
AD  - State Key Laboratory of Urban Water Resource and Environment, School of 
      Environment, Harbin Institute of Technology, Harbin 150090, China.
FAU - Yu, Yuan
AU  - Yu Y
AD  - State Key Laboratory of Urban Water Resource and Environment, School of 
      Environment, Harbin Institute of Technology, Harbin 150090, China.
FAU - Zhang, Jinna
AU  - Zhang J
AD  - State Key Laboratory of Urban Water Resource and Environment, School of 
      Environment, Harbin Institute of Technology, Harbin 150090, China.
FAU - Liu, Yanbiao
AU  - Liu Y
AUID- ORCID: 0000-0001-8404-3806
AD  - College of Environmental Science and Engineering, Textile Pollution Controlling 
      Engineering Center of the Ministry of Ecology and Environment, Donghua 
      University, Shanghai 201620, China.
FAU - You, Shijie
AU  - You S
AUID- ORCID: 0000-0001-8178-9418
AD  - State Key Laboratory of Urban Water Resource and Environment, School of 
      Environment, Harbin Institute of Technology, Harbin 150090, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20231103
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 059QF0KO0R (Water)
RN  - S88TT14065 (Oxygen)
RN  - 0 (Water Pollutants, Chemical)
SB  - IM
MH  - *Water
MH  - Oxygen
MH  - Decontamination
MH  - Electrolysis
MH  - Oxidation-Reduction
MH  - Electrodes
MH  - *Water Pollutants, Chemical/chemistry
OTO - NOTNLM
OT  - chlorinated byproducts
OT  - electrochemical advanced oxidation process
OT  - molecular oxygen activation
OT  - oxygen evolution reaction
OT  - water flow-driven
EDAT- 2023/11/03 06:44
MHDA- 2023/11/15 06:43
CRDT- 2023/11/03 04:32
PHST- 2023/11/15 06:43 [medline]
PHST- 2023/11/03 06:44 [pubmed]
PHST- 2023/11/03 04:32 [entrez]
AID - 10.1021/acs.est.3c02256 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2023 Nov 14;57(45):17404-17414. doi: 
      10.1021/acs.est.3c02256. Epub 2023 Nov 3.