一种含量低的CeO双重促进的Ni3Fe@CNT电催化剂用于整体的水分离
Mingqi Sun1, Shuai Zhang1, Yaru Li1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China. xusl@buct.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|June 27, 2023
概括
在碳纳米管 (Ni3Fe@CNTs) 中封装的铁合金纳米粒子中引入含量低的氧化 (CeO2),可以产生高效的双功能电催化剂. 这种材料显著提高了氧气和的演化反应,用于整体的水分裂,推动了可再生燃料的生产.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 高效的电催化剂对于通过水分裂变生产可再生燃料至关重要.
- 目前的策略往往涉及复杂的混合结构或昂贵的贵金属.
- 开发低成本,高性能双功能电催化剂仍然是一个重大挑战.
研究的目的:
- 为了合成和表征一种新的双功能电催化剂,用于整体的水分.
- 研究将低含量的氧化纳入Ni3Fe@CNTs.的协同效应.
- 评估氧进化反应 (OER) 和进化反应 (HER) 的电催化性能.
主要方法:
- 一种复合式电催化剂 (Ni3Fe@CNTs/CeO2) 通过将胺和三元NiFeCe层双氧化物混合物进行热解来合成.
- 电催化活性被评估使用循环电压测量和时测量在1.0MKOH.
- 对于OER和HER,性能与Ni3Fe@CNTs/NF和CeO2/NF进行了基准测试.
主要成果:
- Ni3Fe@CNTs/CeO2复合物表现出增强的OER和HER活动.
- 在10 mA cm-2下记录了195 mV (OER) 和125 mV (HER) 的低超电位.
- 使用这种催化剂的电解器在1.641V的电池电压下实现了10 mA cm-2的总体水分裂.
结论:
- 加入低含量的CeO2显著增强了Ni3Fe@CNTs的双功能电催化活性.
- CeO2,CNTs和Ni3Fe合金之间的协同效应有助于提高性能.
- 本研究提出了一种有效的策略,用于设计成本效益高,高性能电催化剂,用于水分.
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