诱导的快速B-Ni电荷转移通路Ni3+/Ni2+网站可逆转换,使得有效的尿素氧化辅助气生产成为可能
Chao Fan1, Meng Zhang1, Yuzhuo Sun2
1Inner Mongolia Key Laboratory of Rare Earth Catalysis, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
用尿素氧化反应 (UOR) 取代氧化演化反应 (OER) 可以提高的生产效率. 一种新的B-NiCo-LDH催化剂通过可逆的Ni3+/Ni2+转换机制实现了高效的UOR,显著降低了能源障碍.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 在水分裂过程中,氧气演化反应 (OER) 耗费大量能量.
- 尿素氧化反应 (UOR) 为生产提供了低电压的替代方案.
- 基于的层状双氧化物 (NiM-LDHs) 是一个有前途的电催化剂.
研究的目的:
- 报告一种新的可逆Ni3+/Ni2+转换机制,以获得高效的UOR.
- 为了研究B位多在电催化用NiM-LDHs中的作用.
- 开发一个高效的尿素辅助水电解系统.
主要方法:
- B-NiCo-LDH电催化剂的合成和表征.
- 电化学评估UOR活动和机制.
- 用尿素辅助的水电解仪的制造和测试.
主要成果:
- B-NiCo-LDH表现出快速的B-Ni电荷转移,促进了Ni3+生成和可逆的Ni3+/Ni2+循环.
- 催化剂实现了100 mA cm-2 UOR的1.39 V与RHE相比的超低电压.
- 尿素辅助电解器在淡水和海水中表现出高性能 (100mA cm-2在1.55-1.57V) 具有出色的稳定性 (>100小时).
结论:
- B-NiCo-LDH催化剂通过受控的Ni氧化还原循环有效地降低了UOR的能量屏障.
- 这项工作介绍了一种高效的电催化剂,用于尿素辅助的水电解,适用于各种水条件.
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