Pd Nanoparticles Loaded on CoAlCe Layered Double Oxide Nanosheets for Phenol Hydrogenation,ACS Applied Nano Materials

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Pd Nanoparticles Loaded on CoAlCe Layered Double Oxide Nanosheets for Phenol Hydrogenation
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2021-11-01 , DOI: 10.1021/acsanm.1c02398
Haiping Li _{1,

2,

3} , Xue Wang ₁ , Yanan Liu _{1,

2} , Yufei He _{1,

2} , Junting Feng _{1,

2} , Dianqing Li _{1,

2}

Affiliation

The catalytic upgrading of phenolic derivatives is vital for the efficient utilization of biomass resources. Herein, we construct a reductive layered double oxide material (CoAlCe-LDO) with the Ce–Co interface and abundant oxygen vacancy (V_O) via heat-treating layered double hydroxide (LDH) precursors. The support spontaneous in situ redox method is employed to prepare the supported catalyst using CoAlCe-LDO as a support and reductant. Interestingly, highly dispersed Pd nanoparticles prefer to distribute at the contact edge of the Ce–Co interface. Pd²⁺ is successfully reduced to Pd⁰ by the reductive Co/Ce sites. Due to the redox reaction between the support and Pd species, a strong metal–support interaction is introduced. The Pd/CoAlCe-LDO catalyst shows high activity for phenol hydrogenation under mild conditions and a low molar ratio of Pd to phenol. The kinetic study suggests that the highly dispersed Pd sites could preferably activate H₂ molecules, thereby boosting the rapid phenol hydrogenation.

中文翻译：

负载在 CoAlCe 层状双氧化物纳米片上的 Pd 纳米颗粒用于苯酚加氢

酚类衍生物的催化升级对于生物质资源的有效利用至关重要。在此，我们通过热处理层状双氢氧化物 (LDH) 前驱体构建了具有 Ce-Co 界面和丰富氧空位 (V _O )的还原层状双氧化物材料 (CoAlCe-LDO) 。以CoAlCe-LDO为载体和还原剂，采用载体自发原位氧化还原法制备负载型催化剂。有趣的是，高度分散的 Pd 纳米粒子更喜欢分布在 Ce-Co 界面的接触边缘。Pd ²⁺成功还原为 Pd ⁰通过还原 Co/Ce 位点。由于载体和 Pd 物种之间的氧化还原反应，引入了强烈的金属-载体相互作用。Pd/CoAlCe-LDO 催化剂在温和条件下和低 Pd 与苯酚的摩尔比下显示出高的苯酚加氢活性。动力学研究表明，高度分散的 Pd 位点可以优先激活 H ₂分子，从而促进苯酚的快速氢化。

更新日期：2021-11-26

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