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

Zhang，Xian1,2; Zhu，Huanyu3; Zuo，Ziteng1; Jin，Mengtian1; Peng，Ouwen1; Lian，Qing1; Huang，Yulan1; Cheng，Peng3; Ai，Zhong5; Xiang，Shengling1; Amini，Abbas6; Song，Shaoxian3; Jia，Feifei3; Guo，Zhiguang2; Cheng，Chun1,4

2024-06-15

10.1016/j.cej.2024.151705

Chemical Engineering Journal   影响因子和分区

1385-8947

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 at 6 M KOH, 60 °C for overall seawater splitting, and works stably for 200 h at 1000 mA cm. 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.

Large current density Sustainable hydrogen production Transition-metal oxide/oxyhydroxide Transition-metal phosphide Water/seawater splitting

SCI ; EI

英语

第一

ENGINEERING

2-s2.0-85191526509

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials,Hubei University,Wuhan,430062,China
3.School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan,Wenzhi Street 34, Hubei Province,430070,China
4.Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Southern University of Science and Technology,Shenzhen,518055,China
5.School of Minerals Processing and Bioengineering,Central South University,Changsha,Hunan,410083,China
6.Center for Infrastructure Engineering,Western Sydney University,Kingswood,2751,Australia

Zhang，Xian,Zhu，Huanyu,Zuo，Ziteng,et al. Robust and efficient Iron-Based electrodes for hydrogen production from seawater at high current density above 1000 mA cm−2[J]. Chemical Engineering Journal,2024,490.

Zhang，Xian.,Zhu，Huanyu.,Zuo，Ziteng.,Jin，Mengtian.,Peng，Ouwen.,...&Cheng，Chun.(2024).Robust and efficient Iron-Based electrodes for hydrogen production from seawater at high current density above 1000 mA cm−2.Chemical Engineering Journal,490.

Zhang，Xian,et al."Robust and efficient Iron-Based electrodes for hydrogen production from seawater at high current density above 1000 mA cm−2".Chemical Engineering Journal 490(2024).