Due to the excellent adsorption capacity on CO₂, Mg‐MOF‐74 is highly potential for carbon capture. However, the practical application is seriously hindered by the poor hydrolytic stability of Mg‐MOF‐74 even towards trace of moisture. Here we report a strategy by adjusting the microenvironment of Mg‐MOF‐74 from hydrophilic to superhydrophobic by coating polydimethylsiloxane (PDS, yielding M74@P), which markedly enhances the hydrolytic stability. Mg‐MOF‐74 is degraded obviously upon exposure to humid atmosphere (75% relative humidity) for 7 days, while M74@P retains its structure well even after 1 year. The dynamic breakthrough results show that the optimized M74@P sample can capture 6.65 mmol g⁻¹ CO₂ from wet CO₂/N₂ mixtures after 100 cycles, which is superior to Mg‐MOF‐74 (1.17 mmol g⁻¹) and most reported adsorbents under comparable conditions (continuous flow adsorption from wet gases). The excellent adsorption capacity and hydrolytic stability make the present adsorbents highly promising for practical applications in carbon capture.

中文翻译：

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量身定制吸附剂的微环境，以实现从湿气体中吸收出色的二氧化碳

由于对CO ₂的出色吸附能力，Mg-MOF-74具有很高的碳捕获潜力。但是，Mg-MOF-74甚至对微量水分的水解稳定性差，严重阻碍了实际应用。在这里，我们通过涂覆聚二甲基硅氧烷（PDS，产生M74 @ P）将Mg-MOF-74的微环境从亲水性改变为超疏水性的​​策略进行了报道，该策略显着提高了水解稳定性。Mg-MOF-74在潮湿环境（相对湿度为75％）中放置7天后会明显降解，而M74 @ P甚至在1年后仍能很好地保持其结构。动态突破结果表明，优化后的M74 @ P样品可从湿CO ₂ / N _2中捕获6.65 mmol g ^-1 CO ₂。100次循环后的混合物，优于Mg-MOF-74（1.17 mmol g ^{- 1}）和在可比条件下（从湿气中连续流动吸附）报告的大多数吸附剂。优异的吸附能力和水解稳定性使本发明的吸附剂在碳捕获的实际应用中极有希望。