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支持的电催化剂的接口工程与共价有机聚合物朝着氧降解反应的方向

Huimin Sun¹, Jinyan Wang¹, Hailong Hu¹

¹Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, PR China.

Journal of colloid and interface science

|November 30, 2024

概括

接口工程增强了氧减少反应 (ORR) 的 (Pd) 催化剂. 用一种共价有机聚合物修改Pd可以提高ORR活性和稳定性,其性能优于空气电池中的商业催化剂.

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:

接口工程对于推进基于金属的电催化剂至关重要,特别是在氧降解反应 (ORR) 中.
开发高效和可访问的接口仍然是催化剂设计中的一个重大挑战.
基于 (Pd) 的催化剂对ORR有希望,但需要优化以提高性能.

研究的目的:

为基于Pd的催化剂设计一个高效的接口,以提高其氧降解反应 (ORR) 的性能.
为了研究与微孔共价有机聚合物接口修改对催化剂性能的影响.
为了评估催化剂在性ORR和空气电池中作为阴极电催化剂的性能.

主要方法:

用Pd基催化剂制备一个三维的中孔金属氧化物支持的Pd基催化剂.
使用微孔共价有机聚合物对Pd催化剂进行界面修改.
催化剂ORR活动的电化学表征,包括半波电位 (E1/2) 和限制电流密度 (JL).
在空气电池中评估催化剂稳定性,甲醇耐受性和性能.

主要成果:

表面修改的Pd催化剂表现出增强的ORR活性,E1/2从0.84V增加到0.86V,JL从5.8mA cm-2增加到6.0mA cm-2.
催化剂表现出极好的甲醇耐受性和长期循环稳定性.
在空气电池中使用时,催化剂达到106mW cm-2的峰值功率密度,与商业Pt/C相比,在45小时内实现了优越的循环稳定性.
半孔/微孔结构和优化的有机-无机接口提供了丰富的活性位点和合适的电子结构.

结论:

开发的接口工程策略有效地提高了性ORR的Pd基电催化剂的活性和稳定性.
修改后的催化剂显示出在空气电池等能量转换装置中的应用有很大的潜力.
这种方法通过优化接口属性为设计先进的电催化剂提供了可行的途径.

关键词:

一种共价有机聚合物.接口工程接口工程有机-无机混合体有机-无机混合体氧降解反应是氧降解反应.多孔的多孔的

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