增强了Co-Mo-S催化剂的活性,以实现水解硫和演化反应通过NaBH4辅助形成
Huandi Hou1, Ting Wang1, Baohuan Wang2
1Sinopec Research Institute of Petroleum Processing Co., Ltd China.
RSC advances
|December 11, 2023
概括
NaBH4的修改增强了用于演化 (HER) 和脱硫 (HDS) 的Co-Mo-S催化剂. 由于暴露的1T-MoS2相,修改后的催化剂表现出更高的活性,这两种反应的激活能量都较低.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
背景情况:
- --硫化物 (Co-Mo-S) 催化剂对于演变反应 (HER) 和脱硫 (HDS) 具有至关重要的作用.
- 优化催化剂结构和相位是提高催化性能的关键.
研究的目的:
- 用NaBH4.4修改的Co-Mo-S催化剂进行合成和表征.
- 评估 NaBH4 修改对 HER 和 HDS 的催化活性的影响.
- 研究影响催化性能的结构和电子特性.
主要方法:
- 用于制备Co-Mo-S催化剂的热水合成.
- 使用NaBH4.4对Co-Mo-S催化剂进行修改.
- 实验性表征 (相纯度,形态,晶体结构,价值分布).
- 密度函数理论 (DFT) 计算用于激活能量分析.
主要成果:
- 通过热水方法成功合成了Co-Mo-S催化剂.
- 修改NaBH4导致HDS和HER的催化活性增强.
- 经过修改的催化剂主要表现出1T-MoS2阶段,与未经修改的催化剂中的2H-MoS2阶段相比,暴露出更多的活性位点.
- 与2H-MoS2.2相比,1T-MoS2上的HDS和HER的激活能量明显较低,DFT计算证实了这一点.
结论:
- 修改NaBH4是一种有效的策略,可以改善HDS和HER的Co-Mo-S催化剂性能.
- 增强的活性归因于1T-MoS2阶段的优先形成,该阶段提供了更活跃的位点和更低的反应障碍.
- 本研究提供了关于能源相关应用中的Co-Mo-S催化剂结构-活性关系的见解.
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