Rou Yuan, Xiao-Hui Wang, Shi-Bin Yin, Xuan Ai, Yun-Chao Yin*, Yu Chen* and Shu-Ni Li*,
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引用次数: 0
摘要
肼氧化反应（HzOR）辅助硝酸还原反应（NO3RR）技术为传统氨（NH3）合成提供了一种节能的替代方案，同时促进了环境的可持续性。本文采用简单共沉淀法和退火法制备了具有尖晶石结构的超薄纳米片亚基CuCo2O4纳米枝晶（ndds）。这种尖晶石骨架具有明确定义的Cu-Co对。在碱性溶液中，CuCo2O4 NDs在−0.3 V NO3RR条件下具有较高的法拉第效率（97.86%）和NH3产率（34.23 mg h-1 mgcat-1），并具有良好的稳定性。这些性质源于Cu-Co对的协同效应和二维结构。当应用于CuCo2O4 NDs||CuCo2O4 NDs电解槽时，hzor辅助NO3RR工作在0.997 V (10 mA cm-2)，比传统的出氧NO3RR系统低573 mV。这项工作提出了一种低压NH3合成策略，结合氮污染物的缓解。
Energy-Efficient Ammonia Production via Coupled Hydrazine Hydrate Oxidation Using CuCo2O4 Nanodendrites with Ultrathin Nanosheet Subunits
The hydrazine oxidation reaction (HzOR)-assisted nitrate reduction reaction (NO3RR) technology provides an energy-efficient alternative to traditional ammonia (NH3) synthesis while promoting environmental sustainability. Herein, we synthesized hierarchical CuCo2O4 nanodendrites (NDs) composed of ultrathin nanosheet subunits with a spinel structure via a simple coprecipitation method followed by annealing. This spinel framework features well-defined Cu–Co pairs. In an alkaline solution, CuCo2O4 NDs achieve a high Faradaic efficiency (97.86%) and an impressive NH3 yield (34.23 mg h–1 mgcat–1) at −0.3 V for NO3RR, accompanied by excellent stability. These properties arise from the synergistic effect of Cu–Co pairs and the two-dimensional architecture. When applied in a CuCo2O4 NDs||CuCo2O4 NDs electrolyzer, the HzOR-assisted NO3RR operates at 0.997 V (10 mA cm–2), which is 573 mV lower than the conventional NO3RR system with oxygen evolution. This work presents a low-voltage NH3 synthesis strategy coupled with nitrogen pollutant mitigation.
期刊介绍：
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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