Colloidal Synthesis of Cu₃N Nanorods and Construction of Cu₃N-Cu₂O Heteronanostructures via Epitaxial Growth.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-07-24 Epub Date: 2024-07-10 DOI:10.1021/acs.nanolett.4c01624

Dong Zheng, Yu-Qing He, He Ou-Yang, Jian-Ding Zhang, Gang Zhang, Shi-Kui Han

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Abstract

The synthesis of transition metal nitrides nanocrystals (TMNs NCs) has posed a significant challenge due to the limited reactivity of nitrogen sources at lower temperatures and the scarcity of available synthesis methods. In this study, we present a novel colloidal synthesis strategy for the fabrication of Cu₃N nanorods (NRs). It is found that the trace oxygen (O₂) plays an important role in the synthesis process. And a new mechanism for the formation of Cu₃N is proposed. Subsequently, by employing secondary lateral epitaxial growth, the Cu₃N-Cu₂O heteronanostructures (HNs) can be prepared. The Cu₃N NRs and Cu₃N-Cu₂O HNs were evaluated as precursor electrocatalysts for the CO₂ reduction reaction (CO₂RR). The Cu₃N-Cu₂O HNs demonstrate remarkable selectivity and stability with ethylene (C₂H₄) Faradaic efficiency (FE) up to 55.3%, surpassing that of Cu₃N NRs. This study provides innovative insights into the reaction mechanism of colloidal synthesis of TMNs NCs and presents alternative options for designing cost-effective electrocatalysts to achieve carbon neutrality.

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通过外延生长胶体合成 Cu3N 纳米棒并构建 Cu3N-Cu2O 异质结构。

过渡金属氮化物纳米晶体（TMNs NCs）的合成是一项重大挑战，原因是氮源在较低温度下的反应活性有限，而且可用的合成方法很少。在本研究中，我们提出了一种用于制造 Cu3N 纳米棒（NRs）的新型胶体合成策略。研究发现，微量氧（O2）在合成过程中起着重要作用。并提出了 Cu3N 形成的新机制。随后，通过二次侧向外延生长，可以制备出 Cu3N-Cu2O 异质结构（HNs）。Cu3N NRs 和 Cu3N-Cu2O HNs 被评估为二氧化碳还原反应（CO2RR）的前体电催化剂。Cu3N-Cu2O HNs 具有显著的选择性和稳定性，乙烯 (C2H4) 法拉第效率 (FE) 高达 55.3%，超过了 Cu3N NRs。这项研究为胶体合成 TMNs NCs 的反应机理提供了创新性见解，并为设计具有成本效益的电催化剂以实现碳中和提供了替代方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.