Chemical Bath Deposition of NiFe Alloy Anode for Efficient Alkaline Water Electrolyzer Integration
Green hydrogen production from water splitting is a feasible way for intermittent renewable energy storage and utilization, where the exploration and scale-up preparation of high-performance anodic oxygen evolution electrocatalysts are critical prerequisites for its industrial-level applications. Herein, a chemical bath deposition of FeNi<sub>3</sub> intermetallic alloys onto Ni mesh support is performed, which delivers a current density of 0.62 A cm<sup>-2</sup> at 1.72 V versus reversible hydrogen electrode for alkaline water oxidation in 1 m KOH and an excellent electrolysis stability at 0.2 A cm<sup>-2</sup> for over 300 h. Moreover, via 3D computational fluid dynamics simulation and flow field optimization, a homogeneous deposition of ≈5400 cm<sup>2</sup> NiFe anode is demonstrated within 4 min using the developed flow bath reactor. Once integrating the as-prepared NiFe anodes into alkaline electrolyzer stack, the voltage variation between each unit cell is below 40 mV at a total operation current of 71 A, or ca. current density of 0.2 A cm<sup>-2</sup>, confirming the uniformity of this batch synthesis protocol and its great potential for industrial alkaline water electrolysis.
Authors
- Dong Hyeon Mok (ORCID: https://orcid.org/0000-0001-5319-7052)
- Kun Jiang (ORCID: https://orcid.org/0000-0003-3148-5058)
- Baoxin Ni (ORCID: https://orcid.org/0000-0002-8795-0206)
- Shusheng Wan (ORCID: https://orcid.org/0009-0002-9917-7764)
- Zhibo Ren (ORCID: https://orcid.org/0000-0001-8034-9752)
- Seoin Back (ORCID: https://orcid.org/0000-0003-4682-0621)
- Guoliang Yu (ORCID: https://orcid.org/0000-0002-6845-1508)
- Weiqi Guo
- Ke Ye
- Xindi Xu (ORCID: https://orcid.org/0000-0002-6285-3477)
- Weiyi Zhang (ORCID: https://orcid.org/0000-0002-2482-6021)
- Jinyi Wang (ORCID: https://orcid.org/0000-0002-1371-6310)
- Wenbin Cai
- Peng Shen (ORCID: https://orcid.org/0000-0002-3765-2630)
- Jingwen Wu (ORCID: https://orcid.org/0000-0001-7808-3756)
Institutions
- Sogang University (KR)
- Shanghai Jiao Tong University (CN)
- Fudan University (CN)
- Huaneng Clean Energy Research Institute (CN)
- Collaborative Innovation Center of Chemistry for Energy Materials (CN)
Publication Details
- Journal
- Small
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1002/smll.202407374
- Citations
- 2
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 0.20
Funders
- National Natural Science Foundation of China
- Ministry of Trade, Industry and Energy
- National Research Foundation of Korea
- Ministry of Science and ICT, South Korea
- National Key Research and Development Program of China
- Science and Technology Innovation Plan Of Shanghai Science and Technology Commission