硫化/层次性多孔碳从消耗的残留水力裂变催化剂作为氧气进化反应的电催化剂
Xinhao Wang1, Yunhui Hou1, Shaohui Ge2
1College of Chemistry and Chemical Engineering, Institute for Sustainable Energy and Resources, Qingdao University, Qingdao, 266071, Shandong, P. R. China.
ChemPlusChem
|September 20, 2023
概括
使用过的水力裂变催化剂被转化为先进的硫化/层次性多孔碳 (NiSx/HPC) 材料,用于高效的氧化演化反应 (OER). 这种上循环方法可以产生具有出色耐用性的高性能催化剂.
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:
- 废弃的水力破解催化剂给炼油厂带来了危险废物挑战.
- 此前已经开发了含硫化纳米粒子/焦炭等级结构 (NiSx/C) 的焦化燃烧催化剂.
研究的目的:
- 为氧化演化反应 (OER) 将危险的废弃催化剂循环升级为新材料.
- 研究衍生催化剂的结构和电化学特性.
主要方法:
- 消耗的NiSx/C催化剂经过碳化和激活,形成Ni/HPC.
- 随后的硫化将Ni/HPC转化为硫化/层次性多孔碳 (NiSx/HPC).
主要成果:
- 优化的NiSx/HPC-8表现出NiS2晶相和高表面积 (1134.9 m2/g),具有层次的微等性.
- NiSx/HPC-8显示出较低的超电位 (236 mV在10 mA/cm2),较低的Tafel斜率 (64.1 mV/dec),以及对OER的优越稳定性.
结论:
- 为危险的废弃催化剂制定了一个可行的上循环战略.
- 重建的NiSx/HPC催化剂具有高的催化性能和耐用性,适用于OER应用.
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