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纳米集群表面微环境调节电催化CO2减少

Seungwoo Yoo^1,2, Suhwan Yoo^1,3, Guocheng Deng^1,2

¹Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea.

Advanced materials (Deerfield Beach, Fla.)

|December 19, 2023

概括

化学家们创造了一种具有疏水性外的新银纳米集群,显著提高了电化学二氧化碳减排 (eCO2RR) 活动和稳定性. 这一突破为有效的碳捕获和利用提供了对催化剂设计的分子见解.

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
催化剂是一种催化剂.

背景情况:

电化学二氧化碳减排 (eCO2RR) 性能受到催化剂-电解质接口的限制.
对界面微环境的精确控制对于理解和优化eCO2RR至关重要.

研究的目的:

为了合成和表征精确结构的银纳米集群与量身定制的有机外.
研究界面疏水性对eCO2RR活动和选择性的影响.

主要方法:

一个25原子的银纳米集群 (Ag25) 的合成,涂有18个酸盐连接体.
在H电池和气膜电极组件中进行电化学测试.
运行表面增强的红外吸收光谱 (SEIRAS).
理论模拟. 理论模拟.

主要成果:

与水友群 (FE_CO: 66.6%) 相比,疏水性Ag25群显示显著增强的eCO2RR活性 (FE_CO: 90.3%,j_CO高达-240 mA cm-2).
疏水集群在120多个小时内表现出稳定的运行.
赛拉斯和模拟显示了水结构和二氧化碳中间体中的联体诱导的变化,这对eCO2RR至关重要.

结论:

在催化剂 - 电解质接口上受限的疏水性是增强eCO2RR的关键因素.
对界面效应的原子学理解为设计先进的电催化剂提供了一条途径.
这项工作为潜在的应用提供了优化二氧化碳减排的机制性见解.

关键词:

在Ag25纳米集群中.减少二氧化碳的减少一氧化碳的一氧化碳.接口结构的界面结构.当地的疏水性.

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