Constructing an Adaptive Heterojunction as a Highly Active Catalyst for the Oxygen Evolution Reaction
- Nanyang Technological Univ. (Singapore)
- Nanyang Technological Univ. (Singapore); The Cambridge Center for Advanced Research and Education in Singapore (Singapore)
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
- Beihang University, Beijing (China)
- Institute of Chemical and Engineering Sciences (Singapore)
- The Cambridge Center for Advanced Research and Education in Singapore (Singapore); Univ. of Cambridge (United Kingdom)
Electrochemical water splitting is of prime importance to green energy technology. Particularly, the reaction at the anode side, namely the oxygen evolution reaction (OER), requires a high overpotential associated with O—O bond formation, which dominates the energy-efficiency of the whole process. Activating the anionic redox chemistry of oxygen in metal oxides, which involves the formation of superoxo/peroxo-like (O2)n–, commonly occurs in most highly active catalysts during the OER process. Here, a highly active catalyst is designed: electrochemically delithiated LiNiO2, which facilitates the formation of superoxo/peroxo-like (O2)n– species, i.e., NiOO*, for enhancing OER activity. The OER-induced surface reconstruction builds an adaptive heterojunction, where NiOOH grows on delithiated LiNiO2 (delithiated-LiNiO2/NiOOH). At this junction, the lithium vacancies within the delithiated LiNiO2 optimize the electronic structure of the surface NiOOH to form stable NiOO* species, which enables better OER activity. This finding provides new insight for designing highly active catalysts with stable superoxo-like/peroxo-like (O2)n– for water oxidation.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); Singapore Ministry of Education (MOE); Singapore National Research Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1807940
- Report Number(s):
- BNL--221794-2021-JAAM
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Journal Issue: 30 Vol. 32; ISSN 0935-9648
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dual active site tandem catalysis of metal hydroxyl oxides and single atoms for boosting oxygen evolution reaction
Crossing the Oxo‐Peroxo Wall for Selective Electrochemical Epoxidation
Identifying the Active Surfaces of Electrochemically Tuned LiCoO2 for Oxygen Evolution Reaction
Journal Article
·
Mon Jun 14 20:00:00 EDT 2021
· Applied Catalysis. B, Environmental
·
OSTI ID:1870840
Crossing the Oxo‐Peroxo Wall for Selective Electrochemical Epoxidation
Journal Article
·
Mon Nov 03 19:00:00 EST 2025
· Advanced Science
·
OSTI ID:2999871
Identifying the Active Surfaces of Electrochemically Tuned LiCoO2 for Oxygen Evolution Reaction
Journal Article
·
Mon Apr 17 20:00:00 EDT 2017
· Journal of the American Chemical Society
·
OSTI ID:1368758