Bimetallic single atom promoted α-MnO₂ for enhanced catalytic oxidation of 5-hydroxymethylfurfural

Abstract

Bimetallic single atoms (Pd and Ni) work in synergy to promote the catalytic performance of α-MnO2, enabling a near unity conversion of HMF to DFF under mild conditions.

Redox-Induced In Situ Growth of MnO2 with Rich Oxygen Vacancies over Monolithic Copper Foam for Boosting Toluene Combustion

“…For MnO 2 /CF, the spectrum is segmented into two peaks. The bounding energy at 532.2 and 529.8 eV could be assigned to the surface adsorption oxygen species (O ads ) and the lattice oxygen (O latt ), respectively. − However, the binding energy of O latt in MnO 2 -O v -0.04/CF (529.5 eV) is lower than that in MnO 2 /CF, suggesting a weaker interaction between the Mn and O atoms in MnO 2 -O v -0.04/CF. ,, In addition, the ratio of O ads /O latt for the MnO 2 -O v -0.04/CF catalyst (0.56) is significantly higher than that for the MnO 2 /CF catalyst (0.30), further confirming that more surface oxygen vacancies are created in the MnO 2 -O v -0.04/CF catalyst. , …”

“…17,20,45 In addition, the ratio of O ads /O latt for the MnO 2 -O v -0.04/CF catalyst (0.56) is significantly higher than that for the MnO 2 / CF catalyst (0.30), further confirming that more surface oxygen vacancies are created in the MnO 2 -O v -0.04/CF catalyst. 36,46 The relative amount of oxygen vacancies in the two catalysts was compared by using EPR technology. As displayed in Figure 4c, symmetrical EPR signals at g = 2.003 are observed in both MnO 2 -O v -0.04/CF and MnO 2 /CF, indicating that oxygen vacancies are present in both materials.…”

Manganese oxide-based catalysts for the sustainable synthesis of value-added chemicals through oxidation processes: a critical review and perspectives for the future

“…This dimer exhibits superior performance for activating O 2 compared to conventional surface OV activation sites. Liao et al 5 introduced a novel approach for enhancing the catalytic activity and selectivity of α-MnO 2 in HMF oxidation. This approach involved the synergistic use of dual-metal single atoms, namely Pd and Ni.…”

“…The sustainable synthesis of value-added chemicals using MnO x -based heterogeneous catalysts has gained attention due to its potential applications in various chemical reactions. [1][2][3][4][5][6][7][8][9][10][11] These catalysts offer advantages such as low cost, abundant availability, ease of synthesis, and eco-friendly nature. In the past five years, significant advancements have been made in the synthesis of value-added chemicals using these catalysts.…”

Electrochemical conversion of 5-hydroxymethylfurfural over CuNi bimetallic catalysts: the synergistic effect of interfacial active sites

“…[1][2][3] 5-Hydroxymethylfurfural (HMF), a downstream product of cellulose, contains both aldehyde and alcoholic hydroxyl groups and is a widely used platform molecule for obtaining biomassbased compounds. 4,5 HMF could be upgraded to numerous value-added products by oxidation or reduction processes. Among them, FDCA as a kind of oxidation chemical of HMF is expected to be the imperative precursor for 2,5-furan-dicarboxylate (PEF) in the production of bio-based plastics.…”