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通过双边界工程,打破电催化剂的活性-耐久性权衡,以促进的进化

Xiaokang Chen¹, Le Su², Yi Tan¹

¹Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, Shandong 266237, China.

Journal of colloid and interface science

|March 23, 2025

概括

具有双边界的高合金增强了电催化剂的演化反应 (HER). 这种双边界工程优化了活性和耐久性,克服了基于Pt的催化剂的关键挑战.

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:

用于演化反应 (HER) 的 (Pt) 电催化剂在平衡催化活性和耐久性方面具有挑战性.
开发具有暴露 (1 1 1) 面和增强内在活性的Pt催化剂是困难的.

研究的目的:

合成具有可调节双边界 (TB) 的高合金 (HEA) 催化剂,以提高 HER 的性能.
研究TBs在增强催化活性和稳定性方面的作用.

主要方法:

通过调节合成具有受控双边界的PtPdAuCuCo高合金.
密度函数理论 (DFT) 计算分析吸附和电子结构.
HER性能的电化学表征,包括超电位和质量活性.

主要成果:

有结核病的HEA催化剂表现出有利的凸起点,促进了快速的HER动力学.
DFT的计算显示,在含有TB的高温电池中,增强了吸附和增强了电子转移.
结核病的HEA表现出15天的异常稳定性和超低的超电位 (51mV在10mA cm−2).
质量活动达到3.05A mg−1_Pt在100mV,比没有结核病的HEAs增加了23.5倍.

结论:

双边界工程在HEAs是一个有前途的策略,以优化活动-耐久性权衡在Pt电催化剂.
结核病产生独特的活跃部位,显著提高了她的表现.
这种方法为设计用于能源应用的先进电催化剂提供了新的途径.

关键词:

凸起的地方是凸起的.在H吸附的吸附过程中.高的合金高的合金.的演化反应反应.双胞胎的边界双胞胎的边界

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