Bio-Inspired Iron-Based Carbonic Anhydrase Mimic for CO2 Hydration and Conversion
Bio-Inspired Iron-Based Carbonic Anhydrase Mimic for CO2 Hydration and Conversion
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DOI：
10.1021/acssuschemeng.3c00209
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
Fuying Zhu;Haochen Qiu;Fei Wang;Xing Zhang;Guo-ping Lu;Yamei Lin;He Huang
中科院分区：
文献类型：
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作者：
Fuying Zhu;Haochen Qiu;Fei Wang;Xing Zhang;Guo-ping Lu;Yamei Lin;He Huang
通过稳定、经济高效的碳酸酐酶 (CA) 类纳米酶进行 CO2 转化成为一种有效且可持续的 CO2 固定方法。在这项工作中，首次报道了一种新型铁基纳米材料（Fe10@CN-Mg）是一种CA模拟物，其中FeNx位点和Mg(OH)2对CO2转化发挥协同催化作用。尽管这种材料的金属含量和成本要低得多，但与报道的 CA 模拟物相比，它具有相当的动力学常数（Km6.37 mM 和 Vmax30.74 mM/min）和显着更高的 CaCO3 形成速率（20.60 g·g–1·h–1，每克催化剂每小时产生的 CaCO3 质量）。 Fe10@CN-Mg 在极端 pH、高温、有机溶剂和高离子强度下加工时非常稳定，并且在长时间储存（两个月）和七个循环后仍保持高活性。此外，Fe10@CN-Mg还成功应用于将CO2转化为环状碳酸酯，具有较高的经济效益。
CO2conversion by stable, cost-effective carbonic anhydrase (CA)-like nanozymes emerges as an efficient and sustainable approach for CO2fixation. In this work, a novel iron-based nanomaterial (Fe10@CN-Mg) was first reported to be a CA mimic, in which FeNxsites and Mg(OH)2play a synergistically catalytic effect for CO2conversion. Although this material has much lower metal content and cost, it has comparable kinetic constants (Km6.37 mM andVmax30.74 mM/min) and a significantly higher CaCO3formation rate (20.60 g·g–1·h–1, the quality of CaCO3produced per hour per gram of the catalyst) than that of reported CA mimics. Fe10@CN-Mg is stable when processed at extreme pH, high temperature, organic solvents, and high ionic strength and also retains high activity after long storage times (two months) and seven cycles. In addition, Fe10@CN-Mg was successfully applied to convert CO2into cyclic carbonates with high economic efficiency.