The group of Prof. Song Li from the National Synchrotron Radiation Laboratory of the University of Science and Technology of China implemented phase control and hetero-atom co-doping (Co/O) to achieve in-plane activation of MoS₂ through atomic-level structural engineering. The electronic state has been used to optimize the HER kinetic process under alkaline conditions, and ultimately assist the HER process under alkaline conditions. The results were published in Journal of ACS Nano (ACS Nano,13,11733-11740, 2019). In this work, a simple “one-pot” method was used to directly prepare the Co / O co-doped self-supporting novel material system Co-O-1T-MoS₂/SWNT. In this work, Co-O-1T-MoS₂/SWNT was obtained through structural engineering including Co/O heteroatoms co-doped into the MoS₂ plane and other modulation strategy to achieve efficiently electrocatalytic splitting water under alkaline conditions. The successful doping of Co / O heteroatoms in MoS₂ was confirmed by X-ray absorption spectroscopy carried out at 1W1B-XAFS experimental station of BSRF, which proved that the formation of Co-O-Mo provided theoretical support for performance optimization. This work not only greatly improves the ability of MoS₂ to electrocatalyze HER under alkaline conditions, but also demonstrates the importance of XAFS in clarifying the structure-performance relationship of catalysts.

Fig. The form and valence of Co / O double heteroatoms co-doped into MoS₂ were obtained using XAFS

Article：

Dengfeng Cao, Ke Ye, Oyawale Adetunji Moses, Wenjie Xu, Daobin Liu,* Pin Song, Chuanqiang Wu, Changda Wang, Shiqing Ding, Shuangming Chen, Binghui Ge, Jun Jiang, and Li Song*, Hai-Wei Liang*. Engineering the In-Plane Structure of Metallic Phase Molybdenum Disulfide via Co and O Dopants toward Efficient Alkaline Hydrogen Evolution. ACS Nano 2019,13,11733-11740.