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Influence of the B3+ Cation Nature on the Properties of CuBO2 Oxides (B=Mn, Co, Cr, Fe, and Ga) with a Delafossite/Crednerite Structure. / Svintsitskiy, Dmitry A.; Kvasova, Ekaterina S.; Sokovikov, Nikolai A. et al.
In: Inorganic Chemistry, Vol. 64, No. 27, 30.06.2025.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Influence of the B3+ Cation Nature on the Properties of CuBO2 Oxides (B=Mn, Co, Cr, Fe, and Ga) with a Delafossite/Crednerite Structure
AU - Svintsitskiy, Dmitry A.
AU - Kvasova, Ekaterina S.
AU - Sokovikov, Nikolai A.
AU - Metalnikova, Vera M.
AU - Kardash, Tatyana Yu
AU - Cherepanova, Svetlana V.
AU - Boronin, Andrei I.
PY - 2025/6/30
Y1 - 2025/6/30
N2 - The paper presents an investigation into the physicochemical and catalytic properties of CuBO2 oxides with a delafossite/crednerite-type structure, exploring the dependence on the nature of the B3+ cation (Mn3+, Co3+, Cr3+, Fe3+, and Ga3+). The catalytic properties in CO oxidation were examined in conjunction with structural data, surface composition, the distribution of surface metal states, and the reactivity of oxygen. The selection of synthesis conditions was tailored to yield crystallized CuBO2 particles exhibiting either a delafossite or crednerite structure, depending on the nature of the B3+ cation nature. Thermal stability increases in the following order: CuMnO2 < CuCrO2 ≈ CuFeO2 ≈ CuCoO2 < CuGaO2. Heating of all the studied mixed oxides in the CO + O2 mixture to 250 °C did not cause changes in the phase composition and structural characteristics. The highest catalytic activity near room temperature was observed for CuMnO2 and CuCrO2. A correlation was established between the catalytic activity of CuBO2 and the reactivity of surface oxygen, presumably attributed to the pronounced lability of the redox transitions between the Cu1+/Cu2+ and Bn+/Bm+ pairs. The transformation of the delafossite/crednerite into a spinel structure can cause both deactivation (B = Fe and Co) and significant catalytic activation (B = Mn and Cr) in low-temperature CO oxidation.
AB - The paper presents an investigation into the physicochemical and catalytic properties of CuBO2 oxides with a delafossite/crednerite-type structure, exploring the dependence on the nature of the B3+ cation (Mn3+, Co3+, Cr3+, Fe3+, and Ga3+). The catalytic properties in CO oxidation were examined in conjunction with structural data, surface composition, the distribution of surface metal states, and the reactivity of oxygen. The selection of synthesis conditions was tailored to yield crystallized CuBO2 particles exhibiting either a delafossite or crednerite structure, depending on the nature of the B3+ cation nature. Thermal stability increases in the following order: CuMnO2 < CuCrO2 ≈ CuFeO2 ≈ CuCoO2 < CuGaO2. Heating of all the studied mixed oxides in the CO + O2 mixture to 250 °C did not cause changes in the phase composition and structural characteristics. The highest catalytic activity near room temperature was observed for CuMnO2 and CuCrO2. A correlation was established between the catalytic activity of CuBO2 and the reactivity of surface oxygen, presumably attributed to the pronounced lability of the redox transitions between the Cu1+/Cu2+ and Bn+/Bm+ pairs. The transformation of the delafossite/crednerite into a spinel structure can cause both deactivation (B = Fe and Co) and significant catalytic activation (B = Mn and Cr) in low-temperature CO oxidation.
UR - https://www.mendeley.com/catalogue/9a756760-be39-3572-bfcf-d109d4f0b0f6/
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105009424526&origin=inward
U2 - 10.1021/acs.inorgchem.5c01254
DO - 10.1021/acs.inorgchem.5c01254
M3 - Article
C2 - 40586737
VL - 64
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 27
ER -
ID: 68292608