Base-free selective conversion of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over a CoOx-CeO2 catalyst

Selective aerobic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over nanojunctions of cobalt–ceria binary oxide in water

“…Three major oxygen species were found in the O 1s XPS profiles of CeO 2 in Fig. 3c, which can be assigned to the lattice oxygen (O 2− ) 32 of peak O I , the oxygen vacancies and surface adsorbed oxygen ions (O 2 − , O 2 2− , and/or O − ) of peak O II , and the adsorbed molecular water of peak O III , 33 respectively. These peaks are located at about 529.6 eV, 531.9 eV, and 533.3 eV, respectively.…”

Crystal Faces‐Tailored Oxygen Vacancy in Au/CeO2 Catalysts for Efficient Oxidation of HMF to FDCA

“…Figure 2e exhibits the O 1 s spectra of Au/CeO 2 samples. The binding energy peaks at 531.2 and 529.0 eV are designated to chemisorbed oxygen (denoted at O ad , area I) species and lattice oxygen (denoted at O latt , area II) species, respectively [37] . It is worth noting that the V O has close correlation with the surface chemisorbed oxygen species.…”

“…The binding energy peaks at 531.2 and 529.0 eV are designated to chemisorbed oxygen (denoted at O ad , area I) species and lattice oxygen (denoted at O latt , area II) species, respectively. [37] It is worth noting that the V O has close correlation with the surface chemisorbed oxygen species. Therefore, the relative ratio of O ad /(O ad + O latt ) was also calculated and decreases in the order of Au/rob-CeO 2 (110) > Au/cub-CeO 2 (100) > Au/oct-CeO 2 (111), respectively, which is matched well with the change trend of the Ce 3 + proportion (Figure 2f).…”

Current Advances in the Sustainable Conversion of 5‐Hydroxymethylfurfural into 2,5‐Furandicarboxylic Acid

“…[45] A first line of research to overcome this issue deals with the use of organic solvents to prevent catalyst deactivation and erosion; however, due to safety and environmental concerns, it will not be discussed further in this Review. [46][47][48][49][50][51] A second is focused on the design of specific catalytic systems composed of supports or co-catalysts able to withstand the reaction conditions through some recycling processes. Several active species based on Au, Pd, Pt, Ag, and Ru have been investigated under basefree conditions.…”

“…Despite a relatively shorter time required for the reaction, the acidic nature of the produced FDCA might compromise the stability of the basic support, deactivating the catalyst and therefore requiring the development of dedicated strategies [45] . A first line of research to overcome this issue deals with the use of organic solvents to prevent catalyst deactivation and erosion; however, due to safety and environmental concerns, it will not be discussed further in this Review [46–51] . A second is focused on the design of specific catalytic systems composed of supports or co‐catalysts able to withstand the reaction conditions through some recycling processes.…”