Improved Pd/Ru metal supported graphene oxide nano-catalysts for hydrodeoxygenation (HDO) of vanillyl alcohol, vanillin and lignin,Green Chemistry

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Improved Pd/Ru metal supported graphene oxide nano-catalysts for hydrodeoxygenation (HDO) of vanillyl alcohol, vanillin and lignin
Green Chemistry ( IF 9.3 ) Pub Date : 2020/02/07 , DOI: 10.1039/d0gc00052c
Shalini Arora _{1,

2,

3,

4} , Neeraj Gupta _{4,

5,

6,

7,

8} , Vasundhara Singh _{1,

2,

3,

4}

Affiliation

Pd and Ru nanoparticles supported on graphene oxide (GO) [Pd@GO and Ru@GO] and bimetallic [Pd/Ru@GO] were prepared and well characterized by XRD, FT-IR, EDS, TEM, XPS and ICP-AES analyses. The prepared nano-catalysts were tested for hydrodeoxygenation (HDO) of lignin monomer molecules – vanillyl alcohol and vanillin. In comparison with previously reported methods, Ru@GO and bimetallic Pd/Ru@GO catalysts showed high activity and selectivity, under milder conditions, at room temperature and 145 psi H₂ pressure, for the formation of p-creosol, a value added product, as a potential future biofuel with antibacterial and anti-insecticidal properties. The multifold advantages of both these catalysts are in terms of reduced catalyst loading with a lower metal content and ambient temperture conditions resulting in higher conversion of the starting material. Furthermore, the efficacy of the developed methodology using Ru@GO and bimetallic Pd/Ru@GO catalysts under the optimized conditions was tested on the phenolic components of commercial lignin obtained by photo-catalytic fragmentation using TiO₂, to obtain a mixture after HDO which contained vanillyl alcohol and p-creosol among others, as indicated by HPLC-MS analysis.

中文翻译：

改进的Pd / Ru金属负载的氧化石墨烯纳米催化剂用于香草醇，香草醛和木质素的加氢脱氧（HDO）

制备了负载在氧化石墨烯（GO）[Pd @ GO和Ru @ GO]和双金属[Pd / Ru @ GO]上的Pd和Ru纳米粒子，并通过XRD，FT-IR，EDS，TEM，XPS和ICP-AES对其进行了很好的表征分析。测试了制备的纳米催化剂对木质素单体分子（香草醇和香草醛）的加氢脱氧（HDO）。与以前报道的方法相比，Ru @ GO和双金属Pd / Ru @ GO催化剂在较温和的条件下，室温和145 psi H ₂压力下表现出高活性和选择性，可以形成p-甲酚，一种增值产品，具有抗菌和抗杀虫特性，是一种潜在的未来生物燃料。这两种催化剂的多重优势在于降低了催化剂的负载量和较低的金属含量，并且环境温度条件导致起始原料的转化率更高。此外，在优化的条件下，使用Ru @ GO和双金属Pd / Ru @ GO催化剂开发的方法的功效，通过使用TiO ₂进行光催化裂解获得的商业木质素的酚组分进行了测试，得到HDO后的混合物，HPLC-MS分析表明，其中含有香草醇和对甲酚。

更新日期：2020-03-24

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