电催化剂
析氧
电解
可再生能源
制氢
电解水
化学工程
分解水
电极
材料科学
碱性水电解
氢
纳米技术
化学
催化作用
电化学
电气工程
有机化学
物理化学
工程类
生物化学
光催化
电解质
作者
Nutthaphak Kitiphatpiboon,Meng Chen,Xiumin Li,Changlin Liu,Shasha Li,Junli Wang,Pengjian Shang,Abuliti Abudula,Guoqing Guan
标识
DOI:10.1016/j.electacta.2022.141438
摘要
Large-scale hydrogen production from water electrolysis using intermittent renewable energy sources such as solar and natural wind systems is currently required to promote the sustainable development goals (SDGs). However, majority of researches focus on water electrolysis under stable operating condition but only a few researches on that under the intermittent condition. Herein, a Ni3S2@NiCo-LDH composite electrocatalyst with a [email protected] structure was successfully synthesized by heterointerface engineering via an in-situ hydrothermal method coupling with an electrodeposition process. The obtained Ni3S2@NiCo-LDH/NF electrode demonstrated superb OER performance with low overpotentials of 305 and 346 mV to deliver current densities of 50 and 100 mA cm−2, respectively. Meanwhile, this electrode remained stable at 100 mA cm−2 in the alkaline solution under both continuous and intermittent conditions without degradation for over 24 h. The remarkable electrocatalytic activity should be attributed to the unique morphology of nano-grasses (core) with nanoflake structure (shell) with a high density of exposed active sites, rich defects and large surface areas. This electrocatalyst design could be applied for the large-scale hydrogen production using electricity generated from intermittent renewable energy.
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