Electrocatalysts Derived from Metal–Organic Frameworks for Oxygen Reduction and Evolution Reactions in Aqueous Media. Issue 37 (28th July 2017)

• Record Type: Journal Article
• Authors: Qian, Yuhong; Khan, Inayat Ali; Zhao, Dan
• Is Part Of: Small. Volume 13:Issue 37(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-28
• Subjects: electrocatalysts -- fuel cells -- metal–air batteries -- metal–organic frameworks -- oxygen reduction and evolution reactions; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201701143
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : Electrochemical energy conversion and storage devices such as fuel cells and metal–air batteries have been extensively studied in recent decades for their excellent conversion efficiency, high energy capacity, and low environmental impact. However, sluggish kinetics of the oxygen‐related reactions at air cathodes, i.e., oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), are still worth improving. Noble metals such as platinum (Pt), iridium (Ir), ruthenium (Ru) and their oxides are considered as the benchmark ORR and OER electrocatalysts, but they are expensive and prone to be poisoned due to the fuel crossover effect, and may suffer from agglomeration and leaching after long‐term usage. To mitigate these limits, it is highly desirable to design alternative ORR/OER electrocatalysts with prominent performance. Metal–organic frameworks (MOFs) are a class of porous crystalline materials consisting metal ions/clusters coordinated by organic ligands. Their crystalline structure, tunable pore size and high surface area afford them wide opportunities as catalytic materials. This Review covers MOF‐derived ORR/OER catalysts in electrochemical energy conversion, with a focus on the different strategies of material design and preparation, such as composition control and nanostructure fabrication, to improve the activity and durability of MOF‐derived electrocatalysts. Abstract : The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the key steps in a series of energy storage and conversion devices. Metal–organic frameworks (MOFs) can act as precursors to prepare superior ORR/OER electrocatalysts. Different strategies for promoting the activity and durability of MOF‐derived ORR/OER electrocatalysts are summarized and analyzed, and comments are given for their further development.