TY - JOUR
T1 - Efficient electrocatalytic H2O2 activation over nitrogen-doped carbon encapsulated Co3O4 for drinking water disinfection
AU - Wen, Xue
AU - Zhang, Xiangcheng
AU - Wang, Meng
AU - Yuan, Congli
AU - Lang, Junyu
AU - Li, Xue
AU - Wei, Hao
AU - Mandler, Daniel
AU - Long, Mingce
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2024/3
Y1 - 2024/3
N2 - Waterborne diseases claim a million lives each year in areas without adequate centralized water treatment. Electrocatalytic •OH production presents a promising avenue for decentralized water disinfection. However, existing catalysts are limited by low activity at neutral pH and the risk of metal leaching. We have developed a chainmail catalyst, N-doped carbon (NC) encapsulated Co3O4 (NC@Co3O4), for efficient electrocatalytic H2O2 activation. Co3O4 extracts electrons from NC, thus enhancing the affinity of O atom of H2O2 at the electron deficient carbon sites in NC and promoting the cleavage of O−O bonds. Consequently, the •OH generation rate catalyzed by NC@Co3O4 was 6.5 times of that by NC. Integrating the NC@Co3O4 into a flow-through electrochemical reactor as cathode, a voltage of only 2 V drove the device to achieve more than 6.8 logs (99.99998 %) of Escherichia coli inactivation in tap water. This work provides an energy-efficient, green, and safe solution for decentralized water disinfection.
AB - Waterborne diseases claim a million lives each year in areas without adequate centralized water treatment. Electrocatalytic •OH production presents a promising avenue for decentralized water disinfection. However, existing catalysts are limited by low activity at neutral pH and the risk of metal leaching. We have developed a chainmail catalyst, N-doped carbon (NC) encapsulated Co3O4 (NC@Co3O4), for efficient electrocatalytic H2O2 activation. Co3O4 extracts electrons from NC, thus enhancing the affinity of O atom of H2O2 at the electron deficient carbon sites in NC and promoting the cleavage of O−O bonds. Consequently, the •OH generation rate catalyzed by NC@Co3O4 was 6.5 times of that by NC. Integrating the NC@Co3O4 into a flow-through electrochemical reactor as cathode, a voltage of only 2 V drove the device to achieve more than 6.8 logs (99.99998 %) of Escherichia coli inactivation in tap water. This work provides an energy-efficient, green, and safe solution for decentralized water disinfection.
KW - Chainmail catalyst
KW - Decentralized water disinfection
KW - Electro-Fenton
KW - Hydroxyl radicals
KW - Nonmetallic sites
UR - http://www.scopus.com/inward/record.url?scp=85175614579&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2023.123437
DO - 10.1016/j.apcatb.2023.123437
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AN - SCOPUS:85175614579
SN - 0926-3373
VL - 342
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 123437
ER -