Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, 071002 Baoding, PR China.
Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, 071002 Baoding, PR China.
J Colloid Interface Sci. 2018 Dec 15;532:650-656. doi: 10.1016/j.jcis.2018.08.038. Epub 2018 Aug 12.
The construction of highly active and stable non-noble metal electrocatalysts for oxygen evolution reaction (OER) is a crucial requirement for green energy utilization. Herein, we report a novel hybrid nanostructure of Zn/Co bimetallic oxide (ZnCoO) hollow polyhedron through a pyrolysis-oxidation strategy derived from bimetallic Zn, Co-zeolitic imidazolate frameworks (ZnCo-ZIFs) rhombic polyhedral. Benefiting from the synergistic effects between highly active metal oxide and the unique polyhedron structure, the ZnCoO hollow polyhedron hybrid displayed outstanding electrocatalytic performances in alkaline media. When the ZnCoO polyhedron was employed as electrocatalysts for OER, a potential as low as 1.66 V (vs. RHE) was required to deliver the current density of 10 mA cm in 1 M KOH, and ZnCoO still presented superior activity after continuously working for cyclic voltammetric scanning of 1000 cycles.
用于氧气析出反应 (OER) 的高效和稳定的非贵金属电催化剂的构建是绿色能源利用的关键要求。在此，我们通过热解-氧化策略，从双金属 Zn、Co-沸石咪唑骨架 (ZnCo-ZIFs) 报道了一种新型的 Zn/Co 双金属氧化物 (ZnCoO) 中空多面体的混合纳米结构。得益于高活性金属氧化物和独特的多面体结构之间的协同效应，ZnCoO 中空多面体杂化结构在碱性介质中表现出优异的电催化性能。当 ZnCoO 多面体被用作 OER 的电催化剂时，在 1 M KOH 中需要低至 1.66 V（相对于 RHE）的电位才能输送 10 mA cm 的电流密度，并且 ZnCoO 在连续进行 1000 次循环伏安扫描后仍然表现出优异的活性。
