Guangbin An, Kang Wang, Min Yang, Jiye Zhang, Haijian Zhong, Liang Wang, Huazhang Guo
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引用次数: 0
摘要
电催化还原 CO2（ECO2RR）到 CO/H2 比率可调的合成气为可持续能源转换和化工生产提供了一条前景广阔的途径。在此，我们报告了一系列掺氮炭黑（NCBx）催化剂，这些催化剂具有定制的氮物种，能够精确控制合成气的成分。在这些催化剂中，NCB3 表现出最佳性能，在-0.9 V 的 H 型电池中实现了较高的 CO 选择性（64.14%）和活性（1.9 mA cm-2）。此外，NCB3 还能在应用电位（-0.5 至 -1.0 V）范围内产生 CO/H2 比率范围较宽（0.52 至 4.77）的合成气。稳定性测试证实了 NCB3 强大的耐久性，它能在长时间电解过程中保持稳定的活性和选择性。这项工作证明了氮物种在调整 ECO2RR 途径中的关键作用，并为设计用于二氧化碳利用和合成气生产的高效、稳定的碳基催化剂确立了一种策略。
Rational Design of Metal-Free Nitrogen-Doped Carbon for Controllable Reduction of CO2 to Syngas.
The electrocatalytic reduction of CO2 (ECO2RR) to syngas with tunable CO/H2 ratios offers a promising route for sustainable energy conversion and chemical production. Here, we report a series of N-doped carbon black (NCBx) catalysts with tailored nitrogen species that enable precise control over the composition of syngas. Among the catalysts, NCB3 exhibits the optimal performance, achieving high CO selectivity (64.14%) and activity (1.9 mA cm-2) in an H-type cell at -0.9 V. Furthermore, NCB3 produces syngas with a wide range of CO/H2 ratios (0.52 to 4.77) across the applied potentials (-0.5 to -1.0 V). Stability tests confirm the robust durability of NCB3, which maintains consistent activity and selectivity over prolonged electrolysis. This work demonstrates the critical role of nitrogen species in tuning ECO2RR pathways and establishes a strategy for designing efficient and stable carbon-based catalysts for CO2 utilization and syngas production.
期刊介绍：
Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.
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