Metal-Organic Framework Templated Pd@PdO-Co3O4 Nanocubes as an Efficient Bifunctional Oxygen Electrocatalyst
Metal-Organic Framework Templated Pd@PdO-Co3O4 Nanocubes as an Efficient Bifunctional Oxygen Electrocatalyst
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金属有机框架模板化 Pd@PdO-Co3O4 纳米立方体作为高效双功能氧电催化剂
DOI：
10.1002/aenm.201702734
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发表时间：
2018-04-16
影响因子：
27.8
通讯作者：
Yu, Han-Qing
中科院分区：
文献类型：
--
作者：
Li, Hong-Chao;Zhang, Ying-Jie;Yu, Han-Qing
金属-空气电池是一种典型的电化学能量储存和转换技术，开发高效的双功能氧还原和析氧催化剂（ORR/OER）是其发展的关键。本文报道了以沸石型金属有机骨架（MOF）为模板合成Pd@ PdO-Co 3 O 4纳米立方体的一般方法。合成的材料对OER和ORR表现出很高的电催化活性，与商业RuO 2和Pt/C电催化剂相当，而其循环性能和稳定性远高于商业RuO 2和Pt/C电催化剂。各种物理化学表征和密度泛函理论计算表明，Pd@ PdO-Co 3 O 4纳米立方体良好的电化学性能主要归因于PdO和由相互连接的结晶Co 3 O 4纳米立方体组成的坚固中空结构之间的协同效应。该工作为控制设计和合成MOF模板杂化纳米材料建立了一种有效的方法，并为开发高性能的能量存储和转换电催化剂提供了巨大的潜力。
The development of high-efficiency bifunctional electrocatalyst for oxygen reduction and evolution reactions (ORR/OER) is critical for rechargeable metal-air batteries, a typical electrochemical energy storage and conversion technology. This work reports a general approach for the synthesis of Pd@PdO-Co3O4 nanocubes using the zeolite-type metal-organic framework (MOF) as a template. The as-synthesized materials exhibit a high electrocatalytic activity toward OER and ORR, which is comparable to those of commercial RuO2 and Pt/C electrocatalysts, while its cycle performance and stability are much higher than those of commercial RuO2 and Pt/C electrocatalysts. Various physicochemical characterizations and density functional theory calculations indicate that the favorable electrochemical performance of the Pd@PdO-Co3O4 nanocubes is mainly attributed to the synergistic effect between PdO and the robust hollow structure composed of interconnected crystalline Co3O4 nanocubes. This work establishes an efficient approach for the controlled design and synthesis of MOF-templated hybrid nanomaterials, and provides a great potential for developing high-performance electrocatalysts in energy storage and conversion.