具有表面氧空位的 Pd 纳米粒子修饰的 Bi2MoO6 纳米片用于选择性室温糠醛加氢和苄基苯基醚氢解,ACS Applied Nano Materials

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具有表面氧空位的 Pd 纳米粒子修饰的 Bi2MoO6 纳米片用于选择性室温糠醛加氢和苄基苯基醚氢解
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-08-30 , DOI: 10.1021/acsanm.3c02823
Abhinav Kumar ₁ , Sourav Chakraborty ₁ , Daphna Shimon ₂ , Yoel Sasson ₁

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生物质原料因其可再生性、能源安全、温室气体减排、废物管理和商业前景而在可持续经济中发挥着至关重要的作用。人们已经开发了多种催化材料，使该工艺能够高效且选择性地生产有价值的化学品。本研究重点关注表面缺陷、表面氧空位 (SOV) 与 Pd 纳米颗粒在环境条件下选择性生物质转化的重要性。_{在此，在环境反应条件下，在Pd纳米颗粒负载的Bi 2} MoO ₆上，生物质衍生的糠醛（FAL）转化为糠醇（FOL）、四氢糠醇（THFOL）和2-甲基四氢呋喃（2-MTHF）（BMO）催化剂。进一步探索了所制造的催化剂的多功能性，用于在室温下将木质素模型醚、苄基苯基醚（BPE）再次选择性裂解为甲苯和苯酚。通过紫外-可见光和傅里叶变换红外 (FT-IR) 吸附实验获得了机理见解，证明了 SOV 数量增加后反应物吸附的改善。此外，基于吸附和对照实验研究，反应介质对吸附强度和吸附模式的影响也得到了合理化。X 射线光电子 (XPS)、拉曼和电子顺磁共振 (EPR) 光谱研究表明，经 NaBH 4 处理后，BMO 的 SOV 有所_增强，用于 BMO 表面上的 Pd 纳米颗粒沉积。使用XPS和透射电子显微镜（TEM）的进一步研究表明，载体对于调节Pd ⁰物质的浓度和Pd纳米颗粒的尺寸至关重要。简而言之，本研究旨在证明金属氧化物表面缺陷的诱导如何提高生物质加工的效率。

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Pd Nanoparticle-Decorated Bi2MoO6 Nanoflakes with Surface Oxygen Vacancies for Selective Room-Temperature Furfural Hydrogenation and Benzyl Phenyl Ether Hydrogenolysis

Biomass-derived feedstock plays a crucial role in a sustainable economy due to its renewable nature, energy security, greenhouse gas reduction, waste management, and commercial prospects. A wide range of catalytic materials have been developed to make the process efficient and selective for the production of valuable chemicals. The present study focuses on the significance of surface defects, the surface oxygen vacancies (SOVs), in conjunction with Pd nanoparticles for selective biomass conversion under ambient conditions. Herein, biomass-derived furfural (FAL) is converted into furfuryl alcohol (FOL), tetrahydrofurfuryl alcohol (THFOL), and 2-methyltetrahydrofuran (2-MTHF) under ambient reaction conditions over Pd nanoparticle-supported Bi₂MoO₆ (BMO) catalysts. The versatility of the fabricated catalyst is further explored for the selective cleavage of a lignin model ether, benzyl phenyl ether (BPE), into toluene and phenol again at room temperature. The mechanistic insights are carried out using UV–visible and Fourier transform infrared (FT-IR) adsorption experiments, demonstrating the improvement in the reactant’s adsorption after an enhancement in the number of SOVs. Furthermore, the impact of the reaction medium on the adsorption strength and mode of adsorption was also rationalized based on adsorption and controlled experimental studies. The X-ray photoelectron (XPS), Raman, and electron paramagnetic resonance (EPR) spectroscopic studies reveal an enhancement in SOVs of BMO after its treatment with NaBH₄, which was used for Pd nanoparticle deposition over the BMO surface. Further study using XPS and transmission electron microscopy (TEM) shows that the support is critical in regulating the concentration of Pd⁰ species and the size of Pd nanoparticles. In brief, the present research aims to demonstrate how the induction of surface defects in metal oxides can enhance the efficiency of biomass processing.

更新日期：2023-08-30

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