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Janus electrocatalytic flow-through membrane enables highly selective singlet oxygen production.

Abstract：

:The importance of singlet oxygen (1O2) in the environmental and biomedical fields has motivated research for effective 1O2 production. Electrocatalytic processes hold great potential for highly-automated and scalable 1O2 synthesis, but they are energy- and chemical-intensive. Herein, we present a Janus electrocatalytic membrane realizing ultra-efficient 1O2 production (6.9 mmol per m3 of permeate) and very low energy consumption (13.3 Wh per m3 of permeate) via a fast, flow-through electro-filtration process without the addition of chemical precursors. We confirm that a superoxide-mediated chain reaction, initiated by electrocatalytic oxygen reduction on the cathodic membrane side and subsequently terminated by H2O2 oxidation on the anodic membrane side, is crucial for 1O2 generation. We further demonstrate that the high 1O2 production efficiency is mainly attributable to the enhanced mass and charge transfer imparted by nano- and micro-confinement effects within the porous membrane structure. Our findings highlight a new electro-filtration strategy and an innovative reactive membrane design for synthesizing 1O2 for a broad range of potential applications including environmental remediation.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zhao Y,Sun M,Wang X,Wang C,Lu D,Ma W,Kube SA,Ma J,Elimelech M

doi

10.1038/s41467-020-20071-w

subject

Has Abstract

pub_date

2020-12-04 00:00:00

pages

6228

issue

1

issn

2041-1723

pii

10.1038/s41467-020-20071-w

journal_volume

11

pub_type

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