Phosphoric acid-modified commercial kieselguhr supported palladium nanoparticles as efficient catalysts for low-temperature hydrodeoxygenation of lignin derivatives in water

Abstract

Efficient production of high value-added chemicals and biofuels via low-temperature chemoselective HDO of lignin derivatives in water is still of challenge. Here, we construct a low-cost, active and stable Pd/PCE...

In-situ Synthesis of Nitrogen-doped Graphene Layer Encapsulated Palladium Nanoparticles for Highly Selective Hydrogenation of Vanillin

“…关于催化醛类的还原, 已报道了 Ni [9] 、 Cu [10] 、 Co [11] 、 Pt [12] 、Au [13] 、Ru [14] 、Ir [15] 、Ru [16] 和 Pd [17][18][19][20] 众所周知, 载体的性质影响金属的状态、试剂的吸 附性质和传质过程, 合适的载体可以提升加氢反应的活 性. 现已有碳 [21] 、 聚合物 [22] 、 Al 2 O 3 [23] 、 介孔二氧化硅 [24] 、 沸石 [25] 、碳纳米管 [26] 、金属-有机框架材料(MOF) [27] 、 石墨烯 [28][29][30] 等载体应用于负载 Pd 纳米颗粒.…”

Al-Doped Core–Shell-Structured Ni@Mesoporous Silica for Highly Selective Hydrodeoxygenation of Lignin-Derived Aldehydes

“…Vanillin is a typically lignin-derived aldehyde that can be manufactured on an industrial scale from biomass and converted into 2-methoxy-4-methylphenol (MMP), which has versatile applications in the fragrance industry and shows promise as an intermediate compound for pharmaceuticals. , To date, a considerable number of effective catalysts have been explored for the hydrodeoxygenation (HDO) of vanillin. − However, most of them used noble metals as the main component, resulting in their application being limited by high prices, which has drawn attention to reusable earth-abundant transition metal-based catalysts. − …”

Significant Promotion of Carboxyl Groups in Palladium Nanoparticles-Supported Biomass Carbon Catalysts for Efficient Low-Temperature Hydrodeoxygenation of Lignin Derivatives in Water

“…Vanillin (VAN) is regarded as a typical platform molecule derived from lignin. Selective conversion of VAN to 2-methoxy-4-methylphenol (MMP) has recently gained great attention since the produced MMP can be used as a promising substrate in biofuels and pharmaceuticals. − Many heterogeneous Pd-based catalysts have been designed for the efficient production of MMP from VAN. ,,− Zhang et al reported that >99% selectivity of MMP was obtained from VAN catalyzed by a 2.0 wt % Pd@NH 2 -UiO-66 catalyst at 100 °C for 1 h, and such an excellent catalytic performance was attributed to the synergistic catalysis between Pd nanoparticles (NPs) and the special metal–organic framework carrier . Lv et al reported that >99% MMP selectivity was achieved over a superhydrophilic mesoporous sulfonated melamine-formaldehyde catalyst at 110 °C for 2 h .…”