Rapid synthesis of gold–palladium core–shell aerogels for selective and robust electrochemical CO2 reduction,Journal of Materials Chemistry A

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Rapid synthesis of gold–palladium core–shell aerogels for selective and robust electrochemical CO2 reduction
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2021-07-15 , DOI: 10.1039/d1ta03103a
Ran Du ₁ , Wei Jin ₂ , Hengbo Wu ₂ , René Hübner ₃ , Lin Zhou ₄ , Geng Xue ₄ , Yue Hu ₄ , Alexander Eychmüller ₅

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Noble metal aerogels (NMAs), one class of the youngest members in the aerogel family, have drawn increasing attention in the last decade. Featuring the high catalytic activity of noble metals and a 3D self-supported porous network of the aerogels, they have displayed profound potential for electrocatalysis. However, considerable challenges reside in the rapid fabrication of NMAs with a well-tailored architecture, constraining the manipulation of their electrochemical properties for optimized performance. Here, a disturbance-assisted dynamic shelling strategy is developed, generating self-supported Au–Pd core–shell gels within 10 min. Based on suitable activation and desorption energies of the involved species as suggested by theoretical calculations, the Au–Pd core–shell aerogel manifests outstanding CO selectivity and stability at low overpotential (faradaic efficiency > 98% at −0.5 V vs. RHE over 12 hours) for the electrochemical CO₂ reduction reaction (CO₂RR). The present strategy offers a new perspective to facilely design architecture-specified high-performance electrocatalysts for the CO₂RR.

中文翻译：

快速合成金-钯核-壳气凝胶，用于选择性和稳健的电化学 CO2 还原

贵金属气凝胶（NMA）是气凝胶家族中最年轻的成员之一，在过去十年中引起了越来越多的关注。它们具有贵金属的高催化活性和气凝胶的 3D 自支撑多孔网络，显示出巨大的电催化潜力。然而，相当大的挑战在于快速制造具有精心设计的架构的 NMA，限制了对其电化学性能的操纵以优化性能。在这里，开发了一种干扰辅助动态脱壳策略，可在 10 分钟内生成自支撑的 Au-Pd 核-壳凝胶。基于理论计算建议的相关物质的合适活化和解吸能，对于电化学 CO ₂还原反应 (CO ₂ RR)，在 12 小时内与RHE 进行对比。本策略为轻松设计结构指定的 CO ₂ RR高性能电催化剂提供了新的视角。

更新日期：2021-08-03

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