Nickel−palladium alloy nanoparticles supported on reduced graphene oxide decorated with metallic aluminum nanoparticles (Al-rGO/NiPd): a multifunctional catalyst for the transfer hydrogenation of nitroarenes and olefins using water as a hydrogen source

Abstract

A multifunctional nanocatalyst, Al-rGO/Ni40Pd60, is designed for the transfer hydrogenation of nitroarenes and olefins using water as a hydrogen source and solvent.

Bimetallic CoNi Nanoflowers for Catalytic Transfer Hydrogenation of Terminal Alkynes

“…However, using hydrogen gas and its storage in chemical laboratories and industries is still challenging due to safety issues [43] . So, the use of reducing agents or hydrogen source like formic acid, isopropyl alcohol, hydrazine hydrate, ammonia borane, NaBH 4 , glycerol etc., used to preferred and explored for industrial purposes due to economic reasons [35] . Hence, using bimetallic nanocatalyst with reducing agents for the hydrogenation of alkynes is the better choice.…”

“…[43] So, the use of reducing agents or hydrogen source like formic acid, isopropyl alcohol, hydrazine hydrate, ammonia borane, NaBH 4 , glycerol etc., used to preferred and explored for industrial purposes due to economic reasons. [35] Hence, using bimetallic nanocatalyst with reducing agents for the hydrogenation of alkynes is the better choice. Among transition metal nanomaterials, the Ni-based catalyst shown excellent catalytic activity for hydrogenation reactions owing to its low cost, redox properties and magnetic behavior, so the use of nickel metal with any other metal is the best choice.…”

“…[18] Though the noble metal catalysts (Pd [19] , Pt [20,21] , Au [22] , Pt/ Nb 2 O 5 [23] ) exhibited remarkable activity, the high cost and limited availability hinder their application in industries. [9,24] Additionally, some other catalysts were reported, such as Ni, [25,26] Cu, [27,28] Co, [29] Fe [30,31] as monometallic catalysts, whereas Au@Ni, [32] Ni/Fe 3 O 4 , [33] Pd/Ni, [34] Al-rGO/Ni-Pd, [35] Ni/Ru/Pt/Au [36] as a bimetallic catalyst. Raney nickel is widely used in industries and chemical laboratories for various hydrogenation reactions as an efficient catalyst that adsorbs hydrogen in its pores [37] but is pyrophoric, air sensitive and requires extra precautions and safety measures while transporting.…”

Internal Interactions within the Complex Type-II Heterojunction of a Graphitic Carbon Nitride/Black Phosphorus Hybrid Decorated with Graphene Quantum Dots: Implications for Photooxidation Performance

“…For the synthesis of graphene, the well-known modified Hummers method was performed to synthesize graphene oxide (GO) . The prepared GOs were used for the synthesis of GQDs based on the previous report with slight modifications .…”

Black Phosphorus Quantum Dots/Carbon Nitride-Reduced Graphene Oxide Ternary Heterojunction as a Multifunctional Metal-Free Photocatalyst for Photooxidation Reactions

“…CN was prepared via the thermal polycondensation method, 32 and rGO was synthesized according to the well-known modified Hummers method. 33,34 Preparation of Binary CN-rGO Heterojunction. For the preparation of binary heterojunction with 3, 5, and 9 wt % rGO contents, as-prepared urea-based CN was taken in a certain amount (48.5, 47.5, and 45.5 mg, respectively) in 40 mL of EtOH in a glass bottle with a suitable cap and sonicated for 1 h in an ultrasonic bath (5 °C, 215 Watt, 30−40 kHz) in EtOH (7 mL).…”