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一个Nd-doped的NiCo spinel双重功能催化剂,用于氧降解反应和氧演化反应:通过表面重建增强活性

Tao Li¹, Lili Bo², Xiaolin Guan³

¹College of Energy, Xiamen University, Xiamen 361102, China; College of Chemistry and Environment Science, Shaanxi University of Technology, Hanzhong 723001, China.

Journal of colloid and interface science

|March 27, 2025

概括

这项研究开发了一种新化氧化旋催化剂,用于增强氧气减少和进化反应. 优化的催化剂表现出极好的双功能活性,为先进的能源应用铺平了道路.

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:

对于氧降解反应 (ORR) 和氧演化反应 (OER) 的高效电催化剂对于能源技术至关重要.
螺旋金属氧化物看起来有希望,但对ORR和OER都活跃的双功能催化剂是非常可取的.
稀土金属修饰的螺旋氧化物是增强催化活性的一个未经探索的领域.

研究的目的:

合成和评估用于双功能ORR和OER的基合NiCo2O4 (Nd合NiCo2O4) 旋转催化剂.
为了研究胺在调节电子结构和表面重建的氧化螺旋的作用.
为了优化 Nd 兴奋剂度,以实现卓越的电催化性能.

主要方法:

合成 Nd-doped NiCo2O4 螺旋催化剂.
在性介质中对ORR和OER活性进行电化学表征.
分析金属离子的表面重建和氧化状态.

主要成果:

-的NiCo2O4催化剂表现出可调节的Co2+/Co4+比率,平衡ORR和OER的活性位点.
优化的Nd0.1Ni0.9Co2O4显示出优异的双功能活性:ORR半波电位为0.735V,OER超电位为302mV在10mA cm-2.
在低电位下,Nd 兴奋剂有效地抑制了过度的 Co4+ 形成,同时促进了 Ni 辅助的 Co4+ 生成.

结论:

新兴奋剂为ORR和OER提供了一种新策略,用于设计高效的双功能的氧化螺旋电催化剂.
开发的Nd0.1Ni0.9Co2O4催化剂为未来在能源转换系统中的商业应用提供了一个有希望的途径.
这项工作为稀土金属修饰的螺旋氧化物在电催化中开辟了新的途径.

关键词:

活动增强活动增强.双功能的催化剂具有两种功能.这是一种N-D-doping.尼科-西内尔氧化物氧化物这是OER/ORRR.表面重建的重建.

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