在双金属NiCoSe纳米花上优化中间体的吸附能量,用于协同性尿素电氧化和进化
Xue-Feng Cheng1, Li-Hua Jiang2, Fangning Liu3
1Jiangsu Engineering Laboratory for Environment Functional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, PR China.
Journal of colloid and interface science
|December 16, 2025
概括
双金属NiCoSe通过优化中间吸附,有效催化尿素氧化反应 (UOR) 和演化反应 (HER). 这种催化剂显示出对可持续生产和环境修复的增强活动.
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
- 可持续能源 可持续能源
背景情况:
- 氧化反应 (UOR) 和演化反应 (HER) 的整合为环境修复和能源生产提供了双重解决方案.
- 由于复杂的电子转移和中间吸附挑战,缓慢的UOR动力学和高超电位阻碍了实际应用.
研究的目的:
- 通过研究双金属NiCoSe.开发一种高活性UOR和HER的催化剂.
- 了解UOR在NiCoSe上的机制,并将其性能与单金属NiSe进行比较.
主要方法:
- 合成花形的NiCoSe催化剂.
- 对UOR和HER活性进行电化学表征.
- 现场拉曼光谱学和电化学质谱学用于机制阐明.
- 密度函数理论 (DFT) 计算用于吸附能量分析.
主要成果:
- NiCoSe表现出优越的UOR活性,在1.17V与RHE相比,达到10mA⋅cm-2的电压,明显低于NiSe.
- 催化剂在10mA⋅cm-2时表现出169.9mV的HER超电位.
- DFT计算和现场研究证实了优化吸附能和详细的UOR机制,包括去质子化和NN合.
结论:
- 与NiSe相比,双金属NiCoSe由于优化中间吸附而提供了更好的UOR和HER性能.
- 该研究阐明了金属化物上的UOR机制,为高效的气生产铺平了道路.
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