Redirecting dynamic surface restructuring of a layered transition metal oxide catalyst for superior water oxidation
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 212-222 |
Journal / Publication | Nature Catalysis |
Volume | 4 |
Issue number | 3 |
Online published | 1 Mar 2021 |
Publication status | Published - Mar 2021 |
Externally published | Yes |
Link(s)
Abstract
Rationally manipulating the in situ formed catalytically active surface of catalysts remains a tremendous challenge for a highly efficient water electrolysis. Here we present a cationic redox-tuning method to modulate in situ catalyst leaching and to redirect the dynamic surface restructuring of layered LiCoO2–xClx (x = 0, 0.1 or 0.2), for the electrochemical oxygen evolution reaction (OER). Chlorine doping lowered the potential to trigger in situ cobalt oxidation and lithium leaching, which induced the surface of LiCoO1.8Cl0.2 to transform into a self-terminated amorphous (oxy)hydroxide phase during the OER. In contrast, Cl-free LiCoO2 required higher electrochemical potentials to initiate the in situ surface reconstruction to spinel-type Li1±xCo2O4 and longer cycles to stabilize it. Surface-restructured LiCoO1.8Cl0.2 outperformed many state-of-the-art OER catalysts and demonstrated remarkable stability. This work makes a stride in modulating surface restructuring and in designing superior OER electrocatalysts via manipulating the in situ catalyst leaching. [Figure not available: see fulltext.].
Citation Format(s)
Redirecting dynamic surface restructuring of a layered transition metal oxide catalyst for superior water oxidation. / Wang, Jian; Kim, Se-Jun; Liu, Jiapeng et al.
In: Nature Catalysis, Vol. 4, No. 3, 03.2021, p. 212-222.
In: Nature Catalysis, Vol. 4, No. 3, 03.2021, p. 212-222.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review