The Interfacial Ni/Fe─O─Y Bonds Contribute to High‐Efficiency Water Splitting
Developing economical and efficient electrocatalysts is critical for hydrogen energy industrialization through water electrolysis. Herein, a novel dual-site synergistic NiFe/Y<sub>2</sub>O<sub>3</sub> hybrid with abundant interfacial Ni/Fe─O─Y bonds is designed by density functional theory (DFT) simulations. In situ Raman spectra combined with DFT calculations reveal that the interfacial Ni/Fe─O─Y units greatly promote H<sub>2</sub>O dissociation and optimize the adsorption of both H* and oxygen species, achieving excellent activity and durability for hydrogen evolution reaction. As expected, NiFe/Y<sub>2</sub>O<sub>3</sub> exhibits a low overpotential of 27 mV at 10 mA cm<sup>-2</sup> and robust stability of over 200 h at 1000 mA cm<sup>-2</sup>, and also outstanding water splitting performance with a low cell voltage of 1.64 V at 100 mA cm<sup>-2</sup>, showing significant potential for real-world applications.
Authors
- Zhen Xin Hui
- Guoyong Wang (ORCID: https://orcid.org/0000-0003-1730-0758)
- Qing Jiang (ORCID: https://orcid.org/0000-0002-6709-5513)
- Zhiwen Chen (ORCID: https://orcid.org/0000-0002-0155-2101)
- Zi Wen (ORCID: https://orcid.org/0000-0002-6515-441X)
- Chandra Veer Singh (ORCID: https://orcid.org/0000-0002-6644-0178)
- Chun Cheng Yang (ORCID: https://orcid.org/0000-0002-2888-8860)
- Hui Li (ORCID: https://orcid.org/0000-0003-3118-7229)
Institutions
- University of Toronto (CA)
- Jilin University (CN)
Publication Details
- Journal
- Small
- Published
- 2024-10-31
- DOI
- https://doi.org/10.1002/smll.202407860
- Citations
- 4
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 0.41
Funders
- National Natural Science Foundation of China