Rational Design of a CoRu Nanoalloy-Embedded Carbon Matrix for Efficient Electrocatalytic Nitrate Reduction

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Fengcai Lei*, Menghan Zhang, Ruixue Huai, Ying Wang, Yuhan Hou, Junfeng Xie, Pin Hao and Jing Yu*, 
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Abstract

The synthesis of ammonia (NH3) through the electrocatalytic reduction of nitrate (NO3) represents a sustainable and environmentally friendly approach to ammonia production, with significant implications for agricultural and chemical industries. Herein, we report the fabrication of a cobalt–ruthenium nanoalloy embedded in an N-doped carbon matrix (CoRu/NC) for NH3 synthesis. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) results show a strong electronic interaction between Co and Ru, which is beneficial for enhancing the catalytic performance. Finally, it shows a remarkable onset potential of 0 V vs reversible hydrogen electrode (RHE) and the highest Faradaic efficiency of 96% for the production of NH3 at −0.2 V vs RHE. The high performance of CoRu/NC is attributed to the synergistic effect between the Co and Ru nanoalloys and the encapsulated carbon matrix. The desirable component of Ru in the alloy could improve the poor hydrogenation ability of pure Co by providing atomic hydrogen (H*), which would facilitate the hydrogenation of the intermediate nitrogen species during the nitrate reduction process. This work presents a promising strategy for efficient and sustainable ammonia synthesis via nitrate reduction, offering insights into the design of advanced electrocatalysts for energy and environmental applications.

Abstract Image

CoRu纳米合金包埋碳基高效电催化还原硝酸盐的合理设计
通过电催化还原硝酸盐(NO3 -)合成氨(NH3)代表了一种可持续和环保的氨生产方法,对农业和化学工业具有重要意义。在此,我们报道了一种嵌入n掺杂碳基体(CoRu/NC)的钴钌纳米合金的制备,用于NH3合成。x射线光电子能谱(XPS)和x射线衍射(XRD)结果表明,Co和Ru之间存在较强的电子相互作用,有利于提高催化性能。结果表明,在−0.2 V时,可逆氢电极(RHE)的起始电位为0 V,生成NH3的法拉第效率最高,达到96%。CoRu/NC的高性能是由于Co和Ru纳米合金与包覆的碳基体之间的协同作用。合金中Ru的理想组分可以通过提供原子氢(H*)来改善纯Co加氢能力差的问题,从而促进硝酸盐还原过程中中间氮的加氢。这项工作提出了一种通过硝酸盐还原高效和可持续合成氨的有前途的策略,为能源和环境应用的先进电催化剂的设计提供了见解。
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来源期刊
CiteScore
8.30
自引率
3.40%
发文量
1601
期刊介绍: ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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