Carbon Nanotubes as Supports for Palladium and Bimetallic Catalysts for Use in Hydrogenation Reactions

Abstract

Carbon nanotubes (CNTs) possess unique properties which make them competitive with conventional catalyst supports. This short review collates findings from many research groups on the benefits of palladium/carbon nanotubes in hydrogenation reactions. The effects of modifixsed CNTs and bimetallic platinum group metal (pgm) catalyst/CNT systems for hydrogenation reactions are also discussed.

Carbon Nanoparticle‐Supported Pd Obtained by Solar Physical Vapor Deposition

“…e optimization of industrially important technological processes and the devising of greener and cost-efficient methods have led to an increase in the search for alternative energy sources and better materials in the last decade [1]. Palladium is one of the most widely used metal catalysts in the chemical industry.…”

“…Palladium is one of the most widely used metal catalysts in the chemical industry. It is often used as a support for hydrogenation reactions [1,2], as a catalyst for oxidation [3] or disproportionation reactions [4], as an electrocatalyst for fuel cells [5], for gas sorption purposes [6], and so forth. Its efficiency is enhanced when dispersed on a substrate with an increased surface area, among which carbon-based supports are the most widely employed [7].…”

“…Its efficiency is enhanced when dispersed on a substrate with an increased surface area, among which carbon-based supports are the most widely employed [7]. To further increase the specific surface area in catalysis reactions, various nanoscale carbonaceous-shaped supports have been recently employed as substrates for palladium, among which could be noted carbon nanoparticles [8], nanofibers [9], hollow nanospheres [10], or nanotubes [1,11]. Usually, a three-step "wet" synthesis of nanoscale carbon-supported Pd is employed [1,[9][10][11].…”

“…To further increase the specific surface area in catalysis reactions, various nanoscale carbonaceous-shaped supports have been recently employed as substrates for palladium, among which could be noted carbon nanoparticles [8], nanofibers [9], hollow nanospheres [10], or nanotubes [1,11]. Usually, a three-step "wet" synthesis of nanoscale carbon-supported Pd is employed [1,[9][10][11]. Firstly, the nanomaterial is obtained by chemical vapor deposition, arc deposition, or physical vapor deposition, onto which Pd 2+ ions (as such, or as complexes) are adsorbed, followed by the chemical or electrochemical reduction of Pd 2+ to metallic Pd [11].…”

Cost-effective flow injection amperometric system with metal nanoparticle loaded carbon nanotube modified screen printed carbon electrode for sensitive determination of hydrogen peroxide

“…The introduction of monometallic nanoparticles with catalytic property on electrode can enhance the performance of H 2 O 2 determination [20][21][22]. In addition, bimetallic nanoparticle was also used to modify electrode for improving sensitivity because it has higher catalytic performance than a single metal [23], depending upon size and shape.…”