以生物质废弃物瓜子壳为碳源、Na₂S₂O₃为硫源,利用一步低温浸渍法合成硫修饰的瓜子壳衍生碳材料,引入硫同时实现了硫修饰和硫掺杂,增强了合成氨催化剂的催化性能。利用扫描电子显微镜、透射电子显微镜、X射线光电子能谱、热重分析仪等手段对催化剂的形貌结构、物理化学性质进行表征,利用硫的疏水性抑制HER竞争反应。结果表明,掺杂的硫原子创造了丰富的电化学活性位点,增强了电催化合成氨性能。催化剂在常温、常压条件下获得了11.46 μg_NH3/(mg_cat.·h)的氨产率,且催化性能稳定。

Taking spent melon seed shell as carbon source and Na₂S₂O₃ as sulfur source,the sulfur modified melon seed shell derived carbon material is synthesized via one-step low temperature impregnation method.The sulfur modification and sulfur doping are achieved at the same time,and the catalytic performance of catalyst for synthesis of ammonia is enhanced.The morphology,structure,physical and chemical properties of the catalyst are characterized by means of scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy and thermogravimetric analyzer,and the hydrophobicity of sulfur is utilized to inhibit HER competitive reaction.Results show that the sulfur atoms doped create abundant electrochemical active sites and enhance the performance of the catalysts in electrocatalytic synthesis of ammonia.Under normal temperature and pressure,the yield of ammonia over the catalyst reaches 11.46 μg_NH3/(mg_cat.·h),and the catalyst remains stable performance.

王金(1989-),女,博士,讲师,研究方向为电催化,wj170095@163.com;王爽(1982-),女,博士,教授,博士生导师,研究方向为环境催化、电催化合成氨、光热催化等,通讯联系人,wangshuang@tyut.edu.cn。