Reducing-agent-free facile preparation of Rh-nanoparticles uniformly anchored on onion-like fullerene for catalytic applications,RSC Advances

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Reducing-agent-free facile preparation of Rh-nanoparticles uniformly anchored on onion-like fullerene for catalytic applications
RSC Advances ( IF 3.9 ) Pub Date : 2020-1-14 , DOI: 10.1039/c9ra09244g
Mayakrishnan Gopiraman ₁ , Somasundaram Saravanamoorthy ₂ , Sana Ullah ₃ , Andivelu Ilangovan ₂ , Ick Soo Kim ₃ , Ill Min Chung ₁

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Herein we report a very simple ‘mix and heat’ synthesis of a very fine Rh-nanoparticle loaded carbon fullerene-C60 nanocatalyst (Rh(0)NPs/Fullerene-C60) for the very first time. The preparation method used no reducing agent and capping agent to control the morphology of the nanocatalyst. Transmission electron microscopy (TEM) results confirmed the uniform decoration of small Rh-nanoparticles on the surface of fullerene-C60. The Rh-content in Rh(0)NPs/Fullerene-C60 was found to be 2.89 wt%. The crystalline properties of Rh(0)NPs/Fullerene-C60 were studied by X-ray diffraction (XRD). The metallic state of Rh-nanoparticles in Rh(0)NPs/Fullerene-C60 was confirmed by X-ray photoemission spectroscopy (XPS). Raman results depicted good interaction between Rh-nanoparticles and fullerene-C60. To our delight, the present Rh(0)NPs/Fullerene-C60 showed excellent catalytic activity in the reduction of 4-nitrophenol with NaBH₄ in water. Very high k_app, k′ and TOF values of 82.14 × 10⁻³ min⁻¹, 4107 × 10⁻³ min⁻¹ and 138 min⁻¹, respectively, were calculated for the Rh(0)NPs/Fullerene-C60 catalyzed reduction of 4-nitrophenol. To the best of our knowledge, this is the most efficient fullerene-based nanocatalyst for the rapid reduction of 4-nitrophenol reported to date. Moreover, the catalytic activity of Rh(0)NPs/Fullerene-C60 was also tested towards Suzuki cross-coupling reactions. Reusability of the Rh(0)NPs/Fullerene-C60 was also tested.

中文翻译：

用于催化应用的均匀锚定在洋葱状富勒烯上的无还原剂简便制备 Rh 纳米粒子

在这里，我们首次报告了一种非常简单的“混合和加热”合成非常精细的 Rh 纳米颗粒负载碳富勒烯-C60 纳米催化剂 (Rh(0)NPs/Fullerene-C60)。该制备方法不使用还原剂和封端剂来控制纳米催化剂的形貌。透射电子显微镜 (TEM) 结果证实了小 Rh 纳米颗粒在富勒烯-C60 表面上的均匀装饰。发现 Rh(0)NPs/富勒烯-C60 中的 Rh 含量为 2.89 wt%。通过 X 射线衍射 (XRD) 研究了 Rh(0) NPs/富勒烯-C60 的结晶性质。Rh(0)NPs/富勒烯-C60 中 Rh 纳米粒子的金属状态通过 X 射线光电子能谱 (XPS) 得到证实。拉曼结果描述了 Rh 纳米粒子和富勒烯-C60 之间的良好相互作用。令我们高兴的是，₄在水中。对于 Rh(0)NPs/Fullerene-C60 催化的 Rh(0)NPs/Fullerene-C60，计算了非常高的k _app、 k ′ 和 TOF 值，分别为 82.14 × 10^-3 min^-1、4107 × 10^-3 min^-1和 138 min^-1 。 4-硝基苯酚的还原。据我们所知，这是迄今为止报道的用于快速还原 4-硝基苯酚的最有效的富勒烯基纳米催化剂。此外，还测试了 Rh(0)NPs/Fullerene-C60 对 Suzuki 交叉偶联反应的催化活性。还测试了 Rh(0)NPs/Fullerene-C60 的可重复使用性。

更新日期：2020-01-14

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