Ultrahigh-Loading of Ir Single Atoms on NiO Matrix to Dramatically Enhance Oxygen Evolution Reaction
University of Science and Technology of China · Southern University of Science and Technology · +1 more institution
Abstract
Engineering single-atom electrocatalysts with high-loading amount holds great promise in energy conversion and storage application. Herein, we report a facile and economical approach to achieve an unprecedented high loading of single Ir atoms, up to ∼18wt%, on the nickel oxide (NiO) matrix as the electrocatalyst for oxygen evolution reaction (OER). It exhibits an overpotential of 215 mV at 10 mA cm–2 and a remarkable OER current density in alkaline electrolyte, surpassing NiO and IrO2 by 57 times and 46 times at 1.49 V vs RHE, respectively. Systematic characterizations, including X-ray absorption spectroscopy and aberration-corrected Z-contrast imaging, demonstrate that the Ir atoms are atomically dispersed at…
Citation impact
- FWCI
- 21.53
- Percentile
- 100%
- References
- 63
Authors
9- QWQi Wang
University of Science and Technology of China, Southern University of Science and Technology
- XHXiang Huang
Southern University of Science and Technology
- ZLZhi Liang Zhao
Southern University of Science and Technology
- MWMaoyu Wang
Oregon State University
- BXBin Xiang
University of Science and Technology of China
Topics & keywords
- Overpotential
- Non-blocking I/O
- Chemistry
- Oxygen evolution
- Electrocatalyst
- Catalysis
- Density functional theory
- Atom (system on chip)
- Affordable and clean energy