Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir
The development of efficient and stable catalysts with high mass activity is crucial for acidic oxygen evolution reaction (OER). In this study, CeO<sub>2</sub>-Ir heterojunctions supported on carbon nanotubes (CeO<sub>2</sub>-Ir/CNTs) are synthesized using a solvothermal meth...
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2023-11-01
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| author | Jianren Kuang Zhi Li Weiqiang Li Changdong Chen Ming La Yajuan Hao |
| author_facet | Jianren Kuang Zhi Li Weiqiang Li Changdong Chen Ming La Yajuan Hao |
| author_sort | Jianren Kuang |
| collection | DOAJ |
| description | The development of efficient and stable catalysts with high mass activity is crucial for acidic oxygen evolution reaction (OER). In this study, CeO<sub>2</sub>-Ir heterojunctions supported on carbon nanotubes (CeO<sub>2</sub>-Ir/CNTs) are synthesized using a solvothermal method based on the heterostructure strategy. CeO<sub>2</sub>-Ir/CNTs demonstrate remarkable effectiveness as catalysts for acidic OER, achieving 10.0 mA cm<sup>−2</sup> at a low overpotential of only 262.9 mV and maintaining stability over 60.0 h. Notably, despite using an Ir dosage 15.3 times lower than that of c-IrO<sub>2</sub>, CeO<sub>2</sub>-Ir/CNTs exhibit a very high mass activity (2542.3 A g<sub>Ir</sub><sup>−1</sup>@1.53 V), which is 58.8 times higher than that of c-IrO<sub>2</sub>. When applied to acidic water electrolyzes, CeO<sub>2</sub>-Ir/CNTs display a prosperous potential for application as anodic catalysts. X-ray photoelectron spectrometer (XPS) analysis reveals that the chemical environment of Ir nanoparticles (NP) can be effectively modulated through coupling with CeO<sub>2</sub>. This modulation is believed to be the key factor contributing to the excellent OER catalytic activity and stability observed in CeO<sub>2</sub>-Ir/CNTs. |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T11:25:57Z |
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| spelling | doaj.art-0d4613d5d6da4d17aaab811976851a4c2023-11-10T15:07:35ZengMDPI AGMaterials1996-19442023-11-011621700010.3390/ma16217000Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-IrJianren Kuang0Zhi Li1Weiqiang Li2Changdong Chen3Ming La4Yajuan Hao5College of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaCollege of Electric and Information Engineering, Pingdingshan University, Pingdingshan 467000, ChinaCollege of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, ChinaCollege of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, ChinaCollege of Electric and Information Engineering, Pingdingshan University, Pingdingshan 467000, ChinaThe development of efficient and stable catalysts with high mass activity is crucial for acidic oxygen evolution reaction (OER). In this study, CeO<sub>2</sub>-Ir heterojunctions supported on carbon nanotubes (CeO<sub>2</sub>-Ir/CNTs) are synthesized using a solvothermal method based on the heterostructure strategy. CeO<sub>2</sub>-Ir/CNTs demonstrate remarkable effectiveness as catalysts for acidic OER, achieving 10.0 mA cm<sup>−2</sup> at a low overpotential of only 262.9 mV and maintaining stability over 60.0 h. Notably, despite using an Ir dosage 15.3 times lower than that of c-IrO<sub>2</sub>, CeO<sub>2</sub>-Ir/CNTs exhibit a very high mass activity (2542.3 A g<sub>Ir</sub><sup>−1</sup>@1.53 V), which is 58.8 times higher than that of c-IrO<sub>2</sub>. When applied to acidic water electrolyzes, CeO<sub>2</sub>-Ir/CNTs display a prosperous potential for application as anodic catalysts. X-ray photoelectron spectrometer (XPS) analysis reveals that the chemical environment of Ir nanoparticles (NP) can be effectively modulated through coupling with CeO<sub>2</sub>. This modulation is believed to be the key factor contributing to the excellent OER catalytic activity and stability observed in CeO<sub>2</sub>-Ir/CNTs.https://www.mdpi.com/1996-1944/16/21/7000CeO<sub>2</sub>-Ir heterojunctionelectrocatalysisacidic oxygen evolution reactionhigh activity and long-term stability |
| spellingShingle | Jianren Kuang Zhi Li Weiqiang Li Changdong Chen Ming La Yajuan Hao Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir Materials CeO<sub>2</sub>-Ir heterojunction electrocatalysis acidic oxygen evolution reaction high activity and long-term stability |
| title | Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir |
| title_full | Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir |
| title_fullStr | Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir |
| title_full_unstemmed | Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir |
| title_short | Achieving High Activity and Long-Term Stability towards Oxygen Evolution in Acid by Phase Coupling between CeO<sub>2</sub>-Ir |
| title_sort | achieving high activity and long term stability towards oxygen evolution in acid by phase coupling between ceo sub 2 sub ir |
| topic | CeO<sub>2</sub>-Ir heterojunction electrocatalysis acidic oxygen evolution reaction high activity and long-term stability |
| url | https://www.mdpi.com/1996-1944/16/21/7000 |
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