Photocatalysis for selective organic transformations has received tremendous attention recently. However, how to achieve high selectivity in the photocatalysis of organic reaction remains a challenge. In this work, we reported new hierarchical Au/CuCo₂O₄ nanotubes for highly selective and efficient photocatalytic hydrogenation of α,β-unsaturated aldehydes. The hierarchical Au/CuCo₂O₄ nanotubes consisting of CuCo₂O₄ nanosheets and Au nanoparticles were prepared by the spinning technique in combination with thermal treatment and photoreduction. The produced Au/CuCo₂O₄ nanotubes were tested as a visible-light-responsive catalyst for the selective hydrogenation of 5-hydroxymethylfurfural to 2,5-furandimethanol. At 20 °C, the catalyst exhibits a high turnover frequency (up to 2727.6 h^–1) with nearly 100% selectivity and 93% conversion. Moreover, the Au/CuCo₂O₄ photocatalyst is highly stable under the reaction conditions and has a wide scope of substrates. The excellent performance of Au/CuCo₂O₄ can be ascribed to the synergistic effect of Au nanoparticles and semiconducting CuCo₂O₄ nanosheets, which achieve an efficient interband electron transition in the metal/semiconductor heterostructures. The unique Au/CuCo₂O₄ heterostructures presented in this work provide not only a green method for the hydrogenation reactions but also an effective way to boost light-induced organic synthesis.

中文翻译：

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可见光照射下Au / CuCo ₂ O ₄纳米管上α，β-不饱和醛的选择性光催化加氢

近来，用于选择性有机转化的光催化受到了极大的关注。然而，如何在有机反应的光催化中实现高选择性仍然是一个挑战。在这项工作中，我们报道了用于α，β-不饱和醛的高度选择性和高效光催化氢化的新型分级Au / CuCo ₂ O ₄纳米管。通过纺丝技术结合热处理和光还原制备了由CuCo ₂ O ₄纳米片和Au纳米粒子组成的Au / CuCo ₂ O ₄纳米管。生产的Au / CuCo ₂ O ₄测试了纳米管作为可见光响应催化剂，用于将5-羟甲基糠醛选择性氢化为2,5-呋喃二甲醇。在20°C时，催化剂表现出较高的周转频率（高达2727.6 h ^–1），具有近100％的选择性和93％的转化率。而且，Au / CuCo ₂ O ₄光催化剂在反应条件下是高度稳定的，并且具有广泛的底物范围。Au / CuCo ₂ O ₄的优异性能归因于Au纳米颗粒和半导体CuCo ₂ O ₄纳米片的协同作用，它们在金属/半导体异质结构中实现了有效的带间电子跃迁。独特的Au / CuCo这项工作中提出的₂ O ₄异质结构不仅为氢化反应提供了一种绿色方法，而且还是促进光诱导的有机合成的有效途径。