期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 1, 页码 464-471出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b13360
关键词
layered double hydroxides; binder-free; oxygen evolution reaction; alkaline polymer electrolyte water electrolyzer; water splitting
资金
- National Natural Science Foundations of China [U1664259, 91434106]
- CAS-DOE Cooperation Project [121421KYSB20160009]
- Natural Science Foundations of Liaoning Province [2014020088]
Employing a low-cost and highly efficient electrocatalyst to replace Ir-based catalysts for oxygen evolution reaction (OER) has drawn increasing interest in renewable energy storage. In this work, a vertically aligned FeOOH/NiFe layered double hydroxides (LDHs) nanosheets supported on Ni foam (VA FeOOH/NiFe LDHs-NF) is prepared as a highly effective OER electrode in alkaline electrolyte. The VA FeOOH/NiFe LDHs-NF represents nanosheet arrays on nickel foam with some interspace among them. The vertically aligned and interlayer-structured architecture is binder-free and contributes to facile strain relaxation, relieving the exfoliation of the catalysts layer caused by the oxygen evolution process. The as-prepared electrode shows current densities of 10 and 500 mA cm(-2) at overpotentials of 208 and 288 mV, and good stability in a half-cell electrolyzer. Besides, the alkaline polymer electrolyte water electrolyzer (APE:WE) with this electrode showed 1.71 V at 200 mA cm(-2), and 2.041 V at 500 mA cm(-2), exhibiting the corresponding energy efficiency of 86.0% and 72. lower heating value of hydrogen), which is better than the typical commercial alkaline water electrolyzer.
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