利用氧化脉冲对抗电化学CO2转化过程中SnO2的原位还原。

IF 4.7 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Advances Pub Date : 2025-07-30 DOI:10.1039/D5MA00272A

Sven Arnouts, Kevin Van Daele, Nick Daems, Mathias van der Veer, Sara Bals and Tom Breugelmans

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引用次数: 0

摘要

周期性阳极脉冲在CO2电还原（p-eCO2R）中的应用为抵消金属氧化物催化剂不可避免的原位还原提供了一条有前途的途径。本研究首次将p-eCO2R应用于仅由锡（氧化物）活性相组成的催化剂，使用石榴结构SnO2@C纳米球。与RHE相比，0.2 V下的周期性、延长的阳极脉冲（30 s）在6小时后对甲酸盐的法达化效率提高了78±2%，而恒电位条件下的法达化效率为71±6%，这表明p-eCO2R可以延长锡基催化剂的寿命，实现更可持续的二氧化碳转化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Countering in situ reduction of SnO2 during electrochemical CO2 conversion via oxidative pulsing†

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Countering in situ reduction of SnO2 during electrochemical CO2 conversion via oxidative pulsing†

The application of periodic anodic pulses in CO₂ electroreduction (p-eCO₂R) offers a promising route to counteract the inevitable in situ reduction of metal oxide catalysts. This study demonstrates the first application of p-eCO₂R to a catalyst composed solely of a tin (oxide) active phase, using a pomegranate-structured SnO₂@C nanosphere. Periodic, prolonged anodic pulses (30 s) at 0.2 V vs. RHE improved faradaic efficiency towards formate after 6 hours, retaining 78 ± 2% versus 71 ± 6% under potentiostatic conditions, suggesting p-eCO₂R can extend Sn-based catalyst lifetimes for more sustainable CO₂ conversion.