Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction
Abstract
Transition-metal oxyhydroxides are attractive catalysts for oxygen evolution reactions (OERs). Further studies for developing transition-metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the next catalysts. Herein, Mo-doped CoOOH was designed as a high-performance model electrocatalyst with durability for 20 h at 10 mA cm-2. Additionally, it had an overpotential of 260 mV (glassy carbon) or 215 mV (nickel foam), which was 78 mV lower than that of IrO2 (338 mV). In situ, Raman spectroscopy revealed the transformation process of CoOOH. Calculations using the density functional theory showed that during OER, doped Mo increased the spin-up density of states and shrank the spin-down bandgap of the 3d orbits in the reconstructed CoOOH under the electrochemical activation process, which simultaneously optimized the adsorption and electron conduction of oxygen-related intermediates on Co sites and lowered the OER overpotentials. Our research provides new insights into the methodical planning of the creation of transition-metal oxyhydroxide OER catalysts.
- Authors:
-
- Henan Normal Univ., Xinxiang (China)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Southern University of Science and Technology (SUSTech), Shenzhen (China)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE; National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 2311261
- Grant/Contract Number:
- AC05-00OR22725; 52072114; 51922008
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Carbon Energy
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2637-9368
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrocatalyst; in situ Raman; Mo‐doped CoOOH; oxygen evolution reaction
Citation Formats
Jia, Zhichao, Yuan, Yang, Zhang, Yanxing, Lyu, Xiang, Liu, Chenhong, Yang, Xiaoli, Bai, Zhengyu, Wang, Haijiang, and Yang, Lin. Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction. United States: N. p., 2023.
Web. doi:10.1002/cey2.418.
Jia, Zhichao, Yuan, Yang, Zhang, Yanxing, Lyu, Xiang, Liu, Chenhong, Yang, Xiaoli, Bai, Zhengyu, Wang, Haijiang, & Yang, Lin. Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction. United States. https://doi.org/10.1002/cey2.418
Jia, Zhichao, Yuan, Yang, Zhang, Yanxing, Lyu, Xiang, Liu, Chenhong, Yang, Xiaoli, Bai, Zhengyu, Wang, Haijiang, and Yang, Lin. Tue .
"Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction". United States. https://doi.org/10.1002/cey2.418. https://www.osti.gov/servlets/purl/2311261.
@article{osti_2311261,
title = {Optimizing 3d spin polarization of CoOOH by in situ Mo doping for efficient oxygen evolution reaction},
author = {Jia, Zhichao and Yuan, Yang and Zhang, Yanxing and Lyu, Xiang and Liu, Chenhong and Yang, Xiaoli and Bai, Zhengyu and Wang, Haijiang and Yang, Lin},
abstractNote = {Transition-metal oxyhydroxides are attractive catalysts for oxygen evolution reactions (OERs). Further studies for developing transition-metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the next catalysts. Herein, Mo-doped CoOOH was designed as a high-performance model electrocatalyst with durability for 20 h at 10 mA cm-2. Additionally, it had an overpotential of 260 mV (glassy carbon) or 215 mV (nickel foam), which was 78 mV lower than that of IrO2 (338 mV). In situ, Raman spectroscopy revealed the transformation process of CoOOH. Calculations using the density functional theory showed that during OER, doped Mo increased the spin-up density of states and shrank the spin-down bandgap of the 3d orbits in the reconstructed CoOOH under the electrochemical activation process, which simultaneously optimized the adsorption and electron conduction of oxygen-related intermediates on Co sites and lowered the OER overpotentials. Our research provides new insights into the methodical planning of the creation of transition-metal oxyhydroxide OER catalysts.},
doi = {10.1002/cey2.418},
journal = {Carbon Energy},
number = 1,
volume = 6,
place = {United States},
year = {Tue Aug 29 00:00:00 EDT 2023},
month = {Tue Aug 29 00:00:00 EDT 2023}
}
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