The morphology and heterojunction engineering are effective ways to boost the performance of Cu-based catalysts. Herein, we have reported the designed synthesis of two-dimensional Cu-CuO heterojunction nanosheets (2D Cu-CuO NS) based on 3-aminopropyl-triethoxysilane (APTES, KH550) aided synthetic strategy. The APTES can act as both the ligand and alkali (-OH) source to guide the large-scale synthesis of 2D Cu-based precursor, which can transform into 2D Cu-CuO NS by the controllable post-treatment. The Si species from APTES can protect the particles from the severe aggregation and growth, guaranteeing the formation of 2D sheets composed of small-sized Cu-CuO heterojunction (about 20 nm). The heterojunction interfaces can provide plentiful active sites to boost the catalytic ability. The 2D sheets can provide large accessible surface, being conducive to the contact of the catalyst and reactants. Benefiting from above virtues, the 2D Cu-CuO NS showed the superior catalytic performance for the reduction of a series of nitro compounds, being superior to most reported non-noble metal-based catalysts. Notably, it exhibited good re-cycled performance with no obvious performance degradation after 10 consecutive catalysis. The present study will be promising to promote the application of the Cu-based catalysts, due to its ability to control the morphology and potential for the large-scale synthesis.

形貌和异质结工程是提高铜基催化剂性能的有效途径。在此，我们报道了基于 3-氨基丙基-三乙氧基硅烷 (APTES，KH550) 辅助合成策略的二维 Cu-CuO 异质结纳米片 (2D Cu-CuO NS) 的设计合成。APTES 可以作为配体和碱 (-OH) 源来指导二维 Cu 基前体的大规模合成，它可以通过可控的后处理转化为二维 Cu-CuO NS。APTES 中的 Si 物种可以保护颗粒免受严重的聚集和生长，保证形成由小尺寸 Cu-CuO 异质结（约 20 nm）组成的二维片材。异质结界面可以提供丰富的活性位点以提高催化能力。二维表可以提供大的可访问表面，有利于催化剂与反应物的接触。得益于上述优点，二维 Cu-CuO NS 在还原一系列硝基化合物方面表现出优异的催化性能，优于大多数报道的非贵金属基催化剂。值得注意的是，它表现出良好的再循环性能，连续催化 10 次后性能没有明显下降。本研究有望促进铜基催化剂的应用，因为它能够控制大规模合成的形态和潜力。它表现出良好的再循环性能，连续催化10次后性能没有明显下降。本研究有望促进铜基催化剂的应用，因为它能够控制大规模合成的形态和潜力。它表现出良好的再循环性能，连续催化10次后性能没有明显下降。本研究有望促进铜基催化剂的应用，因为它能够控制大规模合成的形态和潜力。