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调节的锡氧化物通过持久的酸性CO2电还原连续生产酸

Bingquan Jia^1,2, Zhe Chen¹, Kaili Zhu¹

¹Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310024, China.

Science advances

|August 20, 2025

概括

用调节的氧化锡 (SnO_x) 催化剂在酸性条件下显示出超过4000小时的显著稳定性,有效地将二氧化碳 (CO₂) 转化为酸 (HCOOH). 这一突破为电化学减少二氧化碳提供了持久的解决方案.

科学领域:

电化学
材料科学
催化剂

背景情况:

酸性CO2减少面临着催化剂腐蚀和H2进化的挑战.
维持Sn+氧化状态的稳定性对于耐用电催化剂至关重要.

研究的目的:

作为一种稳定和有效的酸性CO2减少催化剂,研究Ga调节的SnO_x
为了实现长期耐用的高选择性HCOOH生产.

主要方法:

在酸性条件下的电化学表征 (pH 1.7).
长期稳定性测试 (> 4000 小时) 在 10 厘米的电解器中.
了解Ga在催化剂稳定中的作用的机制研究.

主要成果:

在超过4000小时的时间里,Ga调制的SnO_x呈现出稳定的Sn^δ+氧化状态.
在 -1.63 V_RHE 达到 440 mA cm^{-2 的部分电流密度,具有 91.9% 的单通转换效率 (SPCE).}
在扩大电解器中,HCOOH的法拉第效率>82%,SPCE>50%.

结论:

Ga的晶格氧效应稳定了SnO_x框架,并保护了Sn^δ+位点.
强大的催化剂结构和调节的活性位点增强了CO2的减少活性.
开发的催化系统显示了通过CO2电还原的工业HCOOH生产的巨大潜力.

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