MOFs-Derived N-Doped Carbon-Encapsulated Metal/Alloy Electrocatalysts to Tune the Electronic Structu

• 作 者: Yang Yang Jianwei Su Peng Jiang Jitang Chen Lin Hu Qianwang Chen
• 机 构: Hefei National Laboratory for Physical Science at Microscale,Department of Materials Science & Engin
• 出 处: 中国化学（英文版）
• 发表日期: 2021年9期
• 关键词: Metal-organic frameworks Graphene Alloys Electronic structure Electrocatalysts

Despite progress over the past few years in developing efficient low-cost catalysts,precious metals are still the best catalysts for hydrogen evolution reaction (HER),oxygen evolution reaction (OER),and oxygen reduction reaction (ORR).However,the natural scarcity and high cost greatly hamper their large-scale commercialization.The combination of graphene shell with metal core could tune the electronic structure of carbon active sites.Re-cently,nitrogen doped graphene encapsulated metal or alloy (M@NG) has emerged as novel and fascinating electrocatalysts.In this review,we focus on some recent advances in designing M@NG electrocatalysts for HER,OER and ORR through tuning electronic structure and activity of carbon active sites.We have summarized some facile and universal strategy for synthesizing various M@NG via direct annealing of metal-organic frameworks(MOFs).With elaborated MOFs precursor design,careful control over the nitrogen doping level,metal element types and alloy structure,the elec-tronic structure of carbon active sites can be rationally tuned to optimize activity for different electrochemical reactions.We hope this review can pro-vide new insights into the design of M@NG with high catalytic activity.