催化作用
材料科学
电催化剂
碳纳米管
过氧化氢
电合成
可逆氢电极
纳米颗粒
金属
化学工程
碳纤维
过渡金属
无机化学
电化学
纳米技术
电极
物理化学
化学
工作电极
有机化学
冶金
复合材料
复合数
工程类
作者
Hongshang Hu,Chang Zhang,Shiyuan Liu,Hangyu Qi,Haoyu Wang,Xinyu Wang,Lilong Zhang,Lei Liu,Lipiao Bao,Muneerah Alomar,Jian Zhang,Xing Lü
标识
DOI:10.1002/adfm.202419220
摘要
Abstract Electrosynthesis of hydrogen peroxide (H 2 O 2 ) by two‐electron oxygen reduction reaction (2e − ORR) under acidic conditions is promising. However, constructing a highly efficient acid‐resistant 2e − ORR electrocatalyst is critical but challenging. Herein, a coaxial cobalt single‐atom catalyst on carbon nanotubes (Co SA ‐N‐C/CNTs) is designed and synthesized by an ingenious separation chemical vapor deposition (SCVD) strategy, which achieves higher ORR activity, dominated 2e − selectivity, and superior stability in acid, compared to the counterpart nanoparticle catalyst prepared by traditional mixture pyrolysis. The as‐assembled electrode using Co SA ‐N‐C/CNTs catalyst demonstrates a high H 2 O 2 yield in excess of 2000 mmol g cat −1 h −1 with a Faraday efficiency of >90% over 100 h without decay in a flow cell, as superior to the most reported acidic H 2 O 2 production catalysts. Experimental characterization and theoretical calculations reveal that such excellent 2e − ORR performance of Co SA ‐N‐C/CNTs originate from the combined advantages of strongly coupled coaxial core–shell structure and highly dispersed single‐atom property. Most importantly, a series of other coaxial transition metal single‐atom catalysts (M SA ‐N‐C/CNTs, M = Fe, Cu, or Ni) are prepared through this SCVD strategy, and they all show enhanced ORR performance, demonstrating universality.
科研通智能强力驱动
Strongly Powered by AbleSci AI