Juncai Dong

Nov 15, 2023 | nature.com | Juncai Dong |Zhongbin Zhuang |Shubo Tian

AbstractMetal-nitrogen-doped carbon (M-N-C) catalysts are promising platinum group metals alternatives for fuel cell cathodes; however, their randomly formed, unpredictable coordinations complicate any structure–property investigation and lead to low active site density. Here we achieve dense and well-defined cobalt sites on the surfaces of Co(CN)3 microcrystals, which are identified by single-crystal X-ray diffraction and X-ray absorption spectroscopy.

Feb 17, 2023 | onlinelibrary.wiley.com | Yu-Quan Zhu |Hua Zhou |Juncai Dong |Si-Min Xu

Graphical Abstract Transition metal (oxy)hydroxides are well-known catalysts for biomass electrooxidation to produce valuable chemicals. However, identification of active site remains elusive, owing to the structural complexity under reaction conditions. In this work, a suite of operando spectroscopies and theoretical calculations were combined, unveiling two types of reducible Co3+-oxo species as the active sites in cobalt oxyhydroxide for glucose electrooxidation.