具有堆叠结构的MoS2/NiO异质催化剂,氧空隙和通过尿素电解生产的水友界面
Lei Liu1, Zhifei Gao1, Yu Liao1
1College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China.
Journal of colloid and interface science
|September 25, 2024
概括
这项研究利用氧空位和异构结构增强二硫化物 (MoS2) 用于演化反应 (HER). 开发的催化剂显示出高活性和耐用性,可通过尿素电解有效生产气.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 二维纳米二硫化物 (MoS2) 显示出对演化反应 (HER) 的希望,因为其催化活性,可用性和低成本.
- 目前的MoS2电催化剂的性能低于基催化剂,需要提高性能的策略.
研究的目的:
- 开发一种有效的策略,以提高HER的MoS2电催化性能.
- 研究氧空位 (Ov),异构结构和界面湿度对MoS2性能的协同效应.
主要方法:
- 使用石墨化木制碳 (GWC) 作为平台制备一个水友/气的MoS2@Ov-NiO-GWC异质催化剂.
- 异质催化剂结构的表征,包括纳米板堆叠和丰富的Ov.
- 在1M KOH电解质和整体尿素电解细胞组件中进行HER的电催化测试.
主要成果:
- MoS2@Ov-NiO-GWC催化剂实现了10 mA cm-2的电流密度,超电位为77 mV,在90小时运行后仅增加了1.2%.
- 密度函数理论 (DFT) 的计算显示,Ov-NiO异构接口增强了MoS2活性部位暴露和电子转移.
- 尿素电解电池表现出极好的气生产活动和耐用性,在1.46V时达到100mA cm-2并在100mA cm-2.2时75小时后保持92.8%的电压.
结论:
- 开发的纳米异种催化剂通过协同效应有效地提高了HER的性能.
- 催化剂显示出通过整体尿素电解有效和持久生产的巨大潜力.
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