Han Dongyu, Hao Lin, Wang Yajing, Gao Yongjun, Yan Jingli, Zhang Yufan
State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, 071002 Baoding, PR China.
College of Science, Hebei Agricultural University, 071001 Baoding, PR China.
J Colloid Interface Sci. 2023 Dec 15;652(Pt B):1148-1155. doi: 10.1016/j.jcis.2023.08.172. Epub 2023 Aug 28.
There is still a tremendous challenge in designing environmentally friendly oxygen evolution reaction (OER) catalysts that are inexpensive and high-performing for practical applications. Herein, the self-sacrificing template zeolitic imidazolate framework-67 (ZIF-67) was pyrolyzed under N atmosphere to generate Co species embedded in nanoporous carbon (Co-NC). Then, iron oxyhydroxide (FeOOH) was wrapped onto the Co-NC surface via electrodeposition to shape the Co-NC@FeOOH composites. Benefiting from the core-shell structure, high conductivity, and distributed active sites, Co-NC@FeOOH presents distinguished OER performance with a low overpotential (336 mV) at 10 mA cm and small Tafel slope (49.46 mV dec). This work furnishes a rosy passage for receiving cost-effective electrocatalysts with high efficiency for OER.
设计出对实际应用而言既廉价又高性能的环境友好型析氧反应（OER）催化剂仍然面临着巨大挑战。在此，牺牲模板沸石咪唑酯骨架-67（ZIF-67）在氮气氛围下热解，生成嵌入纳米多孔碳中的钴物种（Co-NC）。然后，通过电沉积将氢氧化氧铁（FeOOH）包裹在Co-NC表面，以形成Co-NC@FeOOH复合材料。受益于核壳结构、高导电性和分布的活性位点，Co-NC@FeOOH在10 mA cm下具有低过电位（336 mV）和小塔菲尔斜率（49.46 mV dec），呈现出卓越的OER性能。这项工作为获得用于OER的高效且经济高效的电催化剂提供了一条光明之路。
