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在普鲁士蓝色类似物中提高氧进化反应性能:金属外溶解,空心内部和阳离子调节的三重游戏

Shiqi Wang^1,2, Wenyi Huo^3,4, Hanchen Feng¹

¹Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing, 211189, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|July 20, 2023

概括

这项研究引入了新的普鲁士蓝色类似物 (PBAs) 用于高效的绿色生产. 新的催化剂表现出优越的氧化演化反应 (OER) 性能,为先进的电催化剂开发铺平了道路.

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:

普鲁士蓝色类似物 (PBA) 对绿色生产有希望,但设计高性能催化剂具有挑战性.
了解催化机制对于有效的PBA的合理设计至关重要.

研究的目的:

开发高性能普鲁士蓝色类似物 (PBAs) 用于高效的氧化演化反应 (OER).
阐明增强开放式资源活动背后的催化机制.

主要方法:

使用低温热解与 (Se) 粉末合成FeMn@CoNi核心外PBAs.
用密度函数理论 (DFT) 计算对合成材料的表征及其催化机制的研究.
对OER的电催化性能进行评估.

主要成果:

合成产生了空洞的FeMn@CoNi PBA,其中含有溶解的Ni纳米粒子和Se.
由此产生的材料显示了超低的OER超电位 (184 mV在10 mA cm−2) 和低的Tafel斜率 (43.4 mV dec−1).
溶解的Ni纳米粒子促进PBA转化为Se合的核心外金属氧化,通过异质连接效应和Se结合增强OER动力学.

结论:

对PBA的新合成方法与对催化途径的深入理解相结合,导致高效的OER催化剂.
开发的Se-doped核心外金属氧化与Ni异质连接代表了绿色生产电催化剂设计的重大进步.

关键词:

普鲁士蓝的类似物是普鲁士蓝的.催化机制是一种催化机制.混合材料混合材料混合材料.金属外溶液中的金属.氧气进化反应反应氧气进化反应

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