NiCoP/Co3O4复合电催化剂与p-n异质连接促进直接尿素燃料电池中的尿素氧化
Lunrong Liu1, Sibo Li1, Zhiping Zhang1
1Department of Chemistry, Yanbian University, Yanji, Jilin 133002, China.
Journal of colloid and interface science
|May 17, 2025
概括
研究人员开发了一种新的NiCoP/Co3O4纳米花催化剂,用于直接尿素燃料电池 (DUFC). 这种催化剂提高了尿素氧化反应 (UOR) 的效率,使废水甚至人类尿液能够产生大量的电力.
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:
- 直接尿素燃料电池 (DUFC) 提供了从含有尿素的废水中回收能源的潜力.
- 有效的尿素氧化反应 (UOR) 催化剂对于DUFC的性能至关重要,但开发仍然具有挑战性.
- 现有的催化剂往往缺乏所需的活性和长期稳定性.
研究的目的:
- 开发一种高度活性和耐用的催化剂,用于DUFC中的尿素氧化反应 (UOR).
- 为了研究一种新的3D纳米花样NiCoP/Co3O4复合物的催化特性.
- 评估复合物在UOR和演化反应 (HER) 以及功能性DUFC中的性能.
主要方法:
- 在泡 (NF) 上生长的3D纳米花样NiCoP/Co3O4复合材料的合成.
- 复合物的电化学表征UOR和HER的催化活性和稳定性.
- 使用复合材料作为阳极电极的DUFC的制造和测试.
- 密度函数理论 (DFT) 计算,以了解反应机制和催化性能.
主要成果:
- NiCoP/Co3O4-NF复合物表现出优异的UOR催化能力,在1.34V时达到100mAcm-2以上,稳定性为120h.
- 该材料还显示了 HER 的有希望的性能,在 100 mA cm-2 时达到 226.04 mV,稳定性为 100 h.
- 使用NiCoP/Co3O4-NF阳极 (DUFC@NiCoP/Co3O4-NF) 的DUFC实现了使用人类尿液的20.16 mW cm-2和14.17 mW cm-2的峰值功率密度.
- DFT计算表明反应中间体的吸附强度中等,有利于催化.
结论:
- 复合物中由NiCoP和Co3O4形成的p-n异构连接通过降低激活能来显著提高UOR效率.
- NiCoP/Co3O4-NF复合物对UOR和HER都表现出卓越的催化活性和耐久性.
- 这项研究提出了一种有前途的新策略,用于设计高效的催化剂,用于用尿素辅助的能源生产和废物回收利用.
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