期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 604, 期 -, 页码 767-775出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.07.022
关键词
Bifunctional catalyst; Zr4+ dopant; Seawater splitting; Layered Double Hydroxide (LDH)
资金
- National Natural Science Foundation of China for Youths [21905118]
- China Postdoctoral Science Foundation [2020 M673037, 2019 M651716]
- Priority Academic Program Development of the Jiangsu Higher Education Institutions
The Zr-doped layered double hydroxide on nickel foam was designed to enhance the bifunctional activities of electrocatalysts, showing superior OER and HER activities in 1M KOH and alkaline simulated seawater electrolyte. The CoFeZr/NF provides a new pathway for large-scale hydrogen production, with almost no attenuation when tested in alkaline seawater electrolyte compared to 1.0 M KOH.
Efficient generation of hydrogen from electrocatalytic water-splitting is of great importance to realize the hydrogen economy. In that field, designing efficient and bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is critical for water splitting. With the increasing demands for bifunctional catalysts, a universal strategy in favor of these catalytic processes is particularly important. Herein, a variety of Zr-doped layered double hydroxide (LDH) with low crystalline grown on nickel foam (NF) is designed to promote the bifunctional activities of electrocatalysts. It is found that the doping of Zr4+ into CoFe-LDH/NF can tune the electronic structure and also expose abundant catalytic active sites to enhance the electrocatalytic activities. In 1 M KOH, the as prepared CoFeZr/NF exhibits superior OER and HER activities with low overpotentials of 233 and 159 mV at 10 mA cm(2). When tested in alkaline simulated seawater electrolyte, CoFeZr/NF also shows high catalytic activities with almost no attenuation when compared with that in 1.0 M KOH. This work will provide a new way for the development of seawater electrolysis for large-scale hydrogen production. (C) 2021 Elsevier Inc. All rights reserved.
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