Details

Autor(en) / Beteiligte

• Zhang, Xian
• Zhu, Huanyu
• Zuo, Ziteng
• Jin, Mengtian
• Peng, Ouwen
• Lian, Qing
• Huang, Yulan
• Cheng, Peng
• Ai, Zhong
• Xiang, Shengling
• Amini, Abbas
• Song, Shaoxian
• Jia, Feifei
• Guo, Zhiguang
• Cheng, Chun

Titel

Robust and efficient Iron-Based electrodes for hydrogen production from seawater at high current density above 1000 mA cm−2

Ist Teil von

• Chemical engineering journal (Lausanne, Switzerland : 1996), 2024-06, Vol.490, p.151705, Article 151705

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Whole-Fe-based electrodes (NiFe-X (X = O, P) NAs/Fe foam) were design to replace traditional nickel-based electrode.•Trace Ni modification enhances corrosion resistance and boosts intrinsic activity of NiFe-X (X = O, P) NAs/Fe foam.•NiFe-P||NiFe-O pair showed voltage of 1.93 V at 3000 mA cm−2 (6 M seawater KOH, 60 °C) and stability of 200 h@1000 mA cm−2.•NiFe-P||NiFe-O pair showed impressive adaptation to fresh water/tap water/seawater and all kinds of renewable energies. The implementation of cheap iron-based catalysts for seawater electrolysis at high- current–density offers an economical and sustainable solution for industrial hydrogen production in near future. However, Fe-based electrodes suffer from poor intrinsic activity and corrosion resistance in seawater, resulting in unsatisfactory seawater splitting performance. Here, we reported the scale-up fabrication of whole-Fe-based electrodes (NiFe-X (X = O, P) NAs/Fe foam) by facile soaking-phosphating. Surface active layers exhibit enhanced corrosion resistance compared to bare Fe foam, and trace Ni modification lowers reaction energy barriers of cathodic NiFeP and in-situ generated anodic NiFeOOH, respectively. Thus, NiFe-P||NiFe-O pair only requires 1.93 V to deliver 3000 mA cm−2 at 6 M KOH, 60 °C for overall seawater splitting, and works stably for 200 h at 1000 mA cm−2. Furthermore, NiFe-X (X = O, P) NAs/Fe foam show impressive adaptation to fresh water/tap water/seawater and all kinds of renewable energies, presenting excellent flexibility for various environmental applications and scenarios.