1. Design of highly active and durable oxygen evolution catalyst with intrinsic chlorine inhibition property for seawater electrolysis
- Author
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Jieli Chen, Xiaodong Shi, Suyang Feng, Jing Li, Xiaohong Gao, Xiao Wu, Ke Li, Anyuan Qi, Chenghang You, and Xinlong Tian
- Subjects
NiFe-LDH/V2CTx/NF catalyst ,Oxygen evolution reaction ,Seawater electrolysis ,Chlorine inhibition ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
High-efficiency seawater electrolysis is impeded by the low activity and low durability of oxygen evolution catalysts due to the complex composition and competitive side reactions in seawater. Herein, a heterogeneous-structured catalyst is constructed by depositing NiFe-layered double hydroxides (NiFe-LDH) on the substrate of MXene (V2CTx) modified Ni foam (NF), and abbreviated as NiFe-LDH/V2CTx/NF. As demonstrated, owing to the intrinsic negative charge characteristic of V2CTx, chlorine ions are denied entry to the interface between NiFe-LDH and V2CTx/NF substrate, thus endowing NiFe-LDH/V2CTx/NF catalyst with high corrosion resistance and durable stability for 110 h at 500 mA cm−2. Meanwhile, the two-dimensional structure and high electrical conductivity of V2CTx can respectively enlarge the electrochemical active surface area and guarantee fast charge transfer, thereby synergistically promoting the catalytic performance of NiFe-LDH/V2CTx/NF in both deionized water electrolyte (261 mV at 100 mA cm−2) and simulated seawater electrolyte (241 mV at 100 mA cm−2). This work can guide the preparation of oxygen evolution catalysts and accelerate the industrialization of seawater electrolysis.
- Published
- 2024
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