Pd‐Pt/modified GO as an efficient and selective heterogeneous catalyst for the reduction of nitroaromatic compounds to amino aromatic compounds by the hydrogen source

Abstract

In this work, different nitroaromatic compounds were successfully reduced to their corresponding aromatic amines with excellent conversion and selectivity in methanol at 50 °C by using Pd‐Pt nanoparticles immobilized on the modified grapheme oxide (m‐GO) and hydrogen as the reducing source. The catalytic efficiency of Pd and Pd‐Pt loading on the modified GO was investigated for the reduction of various nitroaromatic compounds, and the Pd‐Pt/m‐GO system demonstrated the highest conversion and selectivity. The catalyst was characterized by different techniques including FT‐IR, Raman, UV–Vis, XRD, BET, XPS, FESEM, EDS, and TEM. The metal nanoparticles with the size of less than 10 nm were uniformly distributed on the m‐GO. The catalyst could be reused at least five times without losing activity, showing the stability of the catalyst structure. Finally, the efficiency of the prepared catalyst was compared with Pd‐Pt/AC, and Pd‐Pt/GO catalysts.

In Situ Construction of Pt–Ni NF@Ni‐MOF‐74 for Selective Hydrogenation of p‐Nitrostyrene by Ammonia Borane

“…They are usually obtained by chemoselective hydrogenation of nitro compound suing H 2 as hydrogen donors, but the selectivity to aromatic amines is low. Hydrogen‐rich ammonia borane (AB) is a promising hydrogen source for selective hydrogenation reactions, but its stable structure makes the release of hydrogen at mild conditions a challenge . In this work, we show that the in situ synthesized Pt–Ni NF@Ni‐MOF‐74 is active for hydrogen release from AB and exhibits excellent selectivity for selective hydrogenation of 4‐nitrostyrenearomatic amines, even being conducted at room temperature (RT), potentiating its great applications for selective hydrogenation reactions.…”

Efficient Exploration of Phenol Derivatives Using QUBO Solvers with Group Contribution-Based Approaches

“…Although the structures listed in Table have not yet been synthesized, to the best of our knowledge, all structures listed in Table can be synthesized from commercially available chemical structures, such as 4-aminobenzene-1,2-diol. These commercially available structures have been studied and can be synthesized from existing methods. − …”

Synthesis of palladium nanoparticles in carbon dioxide induced reversible ionic liquids and their application

“…使用氢气催化还原对于生 产苯胺类产物具有环境友好和高效等特点 [19] . 对于含 有取代基的硝基苯化合物还原得到相应的苯胺化合 物是一难题 [20,21] . 已有报道将金属Pd用于该还原反 应 [22] , 但该金属往往选择性较低, 对于含有多个官能…”