Details

Autor(en) / Beteiligte

• Wang, Hefeng
• Li, Zixiao
• Hong, Shaohuan
• Yang, Chaoxin
• Liang, Jie
• Dong, Kai
• Zhang, Hui
• Wang, Xiaoyan
• Zhang, Min
• Sun, Shengjun
• Yao, Yongchao
• Luo, Yongsong
• Liu, Qian
• Li, Luming
• Chu, Wei
• Du, Miao
• Gong, Feng
• Sun, Xuping
• Tang, Bo

Titel

Tungstate Intercalated NiFe Layered Double Hydroxide Enables Long‐Term Alkaline Seawater Oxidation

Ist Teil von

• Small (Weinheim an der Bergstrasse, Germany), 2024-07, Vol.20 (28), p.e2311431-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• Renewable electricity‐driven seawater splitting presents a green, effective, and promising strategy for building hydrogen (H2)‐based energy systems (e.g., storing wind power as H2), especially in many coastal cities. The abundance of Cl− in seawater, however, will cause severe corrosion of anode catalyst during the seawater electrolysis, and thus affect the long‐term stability of the catalyst. Herein, seawater oxidation performances of NiFe layered double hydroxides (LDH), a classic oxygen (O2) evolution material, can be boosted by employing tungstate (WO42–) as the intercalated guest. Notably, insertion of WO42− to LDH layers upgrades the reaction kinetics and selectivity, attaining higher current densities with ≈100% O2 generation efficiency in alkaline seawater. Moreover, after a 350 h test at 1000 mA cm−2, only trace active chlorine can be detected in the electrolyte. Additionally, O2 evolution follows lattice oxygen mechanism on NiFe LDH with intercalated WO42−. Tungstate (WO42−)‐intercalated layered double hydroxide on Ni foam (TS‐NiFe LDH/NF) acts as an efficient electrocatalyst for alkaline seawater oxidation, achieving a low overpotential of 412 mV to achieve 1000 mA cm−2 and the stability of the material is up to 350 h at 1000 mA cm−2.