Applications of Rhodium and Ruthenium Catalysts for CO Oxidation: an Overview

Abstract

The rhodium (Rh) and ruthenium (Ru) are very important catalytic materials in various oxidation reactions. It is the best monometallic catalyst for oxidation of carbon monoxide (CO) and practically used in residential catalytic converters. These catalysts are active for CO oxidation at a low temperature. The activity of Ru/Rh catalysts is strongly dependent on the surface area, pore volume and textural properties of designed catalysts. It could be used as an ideal candidate not only for automobile industry through the cross-coupling reactions but also for low-temperature catalytic oxidation of CO. The chemisorptions of CO over Ru/Rh catalysts and supported catalysts were studied in this review. These studies will provide the scientific basis for future design of Ru/Rh oxidation catalysts. Both Ru and Rh are minor metals and supply risk often increases the price. However, the performance improved and cost-reduced nanoparticles of Rh/Ru system are reviewed by this work.

Synthesis and Characterization of Core-Shell Cu-Ru, Cu-Rh, and Cu-Ir Nanoparticles

“…Following the in situ STEM experiment, we performed CO oxidation on the samples to test their performance as catalysts. In fact, ruthenium, rhodium, and iridium are active catalysts for CO oxidation, which is used as a reference reaction to understand the potential catalytic properties of the samples presented in this work. − All samples are supported on γ-Al2O 3 , and the weight loading of PGMs was 0.5%, a result confirmed by ICP-OES. Results are summarized in Figure .…”

Low-temperature CO oxidation over Rh/Al2O3 in a stagnation-flow reactor

“…5 Feng et al 5 comprehensively reviewed CO oxidation performance and reaction mechanisms on platinum (Pt), gold (Au), palladium (Pd), silver (Ag), ruthenium (Ru), rhodium (Rh), and iridium (Ir), and highlighted the need for developing noble metal catalysts that are active for CO oxidation over the range of 100 -250 °C. In a review of CO oxidation on Rh and Ru, Dey et al 6 stated that Rh and Ru-based catalysts are the most effective for CO oxidation at low temperatures.…”

Unraveling Low Overpotential Pathways for Electrochemical CO2 Reduction to CH4 on Pure and Doped MoS2 Edges

“…Rhodium was included as a representative of the platinum-group noble metals and also due to its extensive catalytic applications in organometallic chemistry. 90 Aluminum as a dopant is noted for its good electrocatalytic activity for the CO 2 RR and is also abundant in nature. 56,74,91 In fact, in our group's recent work, we showed single-atom Al-doped copper as a very promising electrocatalyst for CO 2 electroreduction to C 1 hydrocarbons.…”