In:
Nature Communications, Springer Science and Business Media LLC, Vol. 12, No. 1 ( 2021-01-04)
Abstract:
Optimal pH conditions for efficient artificial photosynthesis, hydrogen/oxygen evolution reactions, and photoreduction of carbon dioxide are now successfully achievable with catalytic bipolar membranes-integrated water dissociation and in-situ acid-base generations. However, inefficiency and instability are severe issues in state-of-the-art membranes, which need to urgently resolve with systematic membrane designs and innovative, inexpensive junctional catalysts. Here we show a shielding and in-situ formation strategy of fully-interconnected earth-abundant goethite Fe +3 O(OH) catalyst, which lowers the activation energy barrier from 5.15 to 1.06 eV per HO − H bond and fabricates energy-efficient, cost-effective, and durable shielded catalytic bipolar membranes. Small water dissociation voltages at limiting current density (U LCD : 0.8 V) and 100 mA cm −2 (U 100 : 1.1 V), outstanding cyclic stability at 637 mA cm −2 , long-time electro-stability, and fast acid-base generations (H 2 SO 4 : 3.9 ± 0.19 and NaOH: 4.4 ± 0.21 M m −2 min −1 at 100 mA cm −2 ) infer confident potential use of the novel bipolar membranes in emerging sustainable technologies.
Type of Medium:
Online Resource
ISSN:
2041-1723
DOI:
10.1038/s41467-020-20131-1
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
2553671-0
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