TY - JOUR
T1 - Robust and efficient Iron-Based electrodes for hydrogen production from seawater at high current density above 1000 mA cm−2
AU - Zhang, Xian
AU - Zhu, Huanyu
AU - Zuo, Ziteng
AU - Jin, Mengtian
AU - Peng, Ouwen
AU - Lian, Qing
AU - Huang, Yulan
AU - Cheng, Peng
AU - Ai, Zhong
AU - Xiang, Shengling
AU - Amini, Abbas
AU - Song, Shaoxian
AU - Jia, Feifei
AU - Guo, Zhiguang
AU - Cheng, Chun
N1 - Publisher Copyright:
© 2024
PY - 2024/6/15
Y1 - 2024/6/15
N2 - 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.
AB - 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.
KW - Large current density
KW - Sustainable hydrogen production
KW - Transition-metal oxide/oxyhydroxide
KW - Transition-metal phosphide
KW - Water/seawater splitting
UR - http://www.scopus.com/inward/record.url?scp=85191526509&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2024.151705
DO - 10.1016/j.cej.2024.151705
M3 - Article
AN - SCOPUS:85191526509
SN - 1385-8947
VL - 490
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 151705
ER -