Effect of the phase structure on the catalytic activity of MoO<sub>3</sub> and potential application for indoor clearance

Sun, Peipei; Teng, Fei; Yang, Zhicheng; Yang, Xiaoman; Zhai, Shixian; Liang, Shuyu; Gu, Wenhao; Hao, Weiyi; Shi, Shuangshuang

doi:10.1039/c9tc05241k

Cited by 18 publications

(7 citation statements)

References 57 publications

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“…Thus, the lattice oxygen of CuMoO 4 was affirmed to engage in the oxidation of furfural, and then the formed oxygen vacancy was replenished by oxygen. Similarly, low-valence-state metal species (Cu + , Mo 5+ , and Mo 4+ ) were observed in the used CuMoO 4 in N 2 , whereas only Cu 2+ and Mo 6+ species were observed in the used CuMoO 4 in air (Figure b,c) . The used CuMoO 4 in N 2 was also analyzed by XRD, and the phases of Cu 2 O and MoO 2 were detected (Figure S11).…”

Section: Resultsmentioning

confidence: 89%

“…Two peaks belonging to weak acid sites (100–225 °C) and medium-strong acid sites (225–450 °C) were observed from the NH 3 -TPD pattern of CuMoO 4 . Apparently, the total acid density of the medium-strong acid sites on CuMoO 4 was much higher than those of MoO 3 and CuO, which should be associated with its defect structures . It is widely known that nitrogen-containing compounds such as pyridine can poison acid sites on the catalyst by coordination .…”

Section: Resultsmentioning

confidence: 98%

“…Apparently, the total acid density of the medium-strong acid sites on CuMoO 4 was much higher than those of MoO 3 and CuO, which should be associated with its defect structures. 48 It is widely known that nitrogen- containing compounds such as pyridine can poison acid sites on the catalyst by coordination. 49 Hence, the poisoning effect of pyridine on the performance of CuMoO 4 in the conversion of furfural has been examined.…”

Section: Catalytic Mechanismmentioning

confidence: 99%

“…Similarly, low-valence-state metal species (Cu + , Mo 5+ , and Mo 4+ ) were observed in the used CuMoO 4 in N 2 , whereas only Cu 2+ and Mo 6+ species were observed in the used CuMoO 4 in air (Figure 4b,c). 48 The used CuMoO 4 in N 2 was also analyzed by XRD, and the phases of Cu 2 O and MoO 2 were detected (Figure S11). Accordingly, it is deduced that the redox of Cu + / Cu 2+ and Mo 4+ /Mo 6+ is involved in the oxidation of furfural.…”

Section: Catalytic Mechanismmentioning

confidence: 99%

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Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO₄

Liu

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Green synthesis of high-value furanone derivatives and C 4 organic acids from renewable biomass is a promising yet challenging route. Herein, we report a suitable heterogeneous and recoverable bimetallic CuMoO 4 catalyst for the selective oxidation of furfural to 2(5H)-furanone and maleic acid (MAc). The resulting CuMoO 4 manifested excellent catalytic performance with a high furfural conversion of 99%, giving a 2(5H)-furanone yield of up to 66% or a MAc yield of over 74% by regulating the reaction conditions. The synergy of Cu and Mo species in CuMoO 4 boosted the outstanding catalytic efficiency through the Mo 6+ − Mo 5+ −Mo 4+ redox facilitated by the redox of Cu + /Cu 2+ . More importantly, the Mo species in CuMoO 4 played a key role in activating the aldehyde group in furfural to facilitate hydrogen abstraction from the aldehyde group by CuMoO 4 and the active SO 4•− radical, which was from peroxymonosulfate (PMS). This work presents a sustainable process for the fabrication of bio-based polymer precursors and offers a bifunctional catalysis strategy for efficient oxidation.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 98%

Section: Catalytic Mechanismmentioning

confidence: 99%

Section: Catalytic Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO₄

Liu

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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“…MoO 3 is a non-noble metal oxide known for its catalytic and photocatalytic properties. , Chen et al developed integrated CNT/MoO 3 core/shell arrays on Ni foam (current collector) by atomic layer deposition (ALD) and chemical vapor deposition (CVD) as the freestanding cathode for Li–CO 2 batteries. The Li–CO 2 batteries with CNT/MoO 3 core/shell nanoheterostructures (NHs) delivered a full discharge capacity of 30.25 mAh/cm 2 at 0.05 mA/cm 2 current density and 2 V as the cutoff voltage, initial charging/discharging overpotential of 0.98 V (current density 0.05 mA/cm 2 , cutoff capacity 1 mAh/cm 2 ), a charging voltage below 3.8 V and 300 cycle life at 0.05 mA/cm 2 .…”

Section: Li–co2 Batteriesmentioning

confidence: 99%

Recent Advances in Rechargeable Metal–CO₂ Batteries with Nonaqueous Electrolytes

Sarkar

Dharmaraj

et al. 2023

Chem. Rev.

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This review article discusses the recent advances in rechargeable metal–CO2 batteries (MCBs), which include the Li, Na, K, Mg, and Al-based rechargeable CO2 batteries, mainly with nonaqueous electrolytes. MCBs capture CO2 during discharge by the CO2 reduction reaction and release it during charging by the CO2 evolution reaction. MCBs are recognized as one of the most sophisticated artificial modes for CO2 fixation by electrical energy generation. However, extensive research and substantial developments are required before MCBs appear as reliable, sustainable, and safe energy storage systems. The rechargeable MCBs suffer from the hindrances like huge charging–discharging overpotential and poor cyclability due to the incomplete decomposition and piling of the insulating and chemically stable compounds, mainly carbonates. Efficient cathode catalysts and a suitable architectural design of the cathode catalysts are essential to address this issue. Besides, electrolytes also play a vital role in safety, ionic transportation, stable solid-electrolyte interphase formation, gas dissolution, leakage, corrosion, operational voltage window, etc. The highly electrochemically active metals like Li, Na, and K anodes severely suffer from parasitic reactions and dendrite formation. Recent research works on the aforementioned secondary MCBs have been categorically reviewed here, portraying the latest findings on the key aspects governing secondary MCB performances.

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Advances in Defect Engineering of Metal Oxides for Photocatalytic CO₂ Reduction

Zhong,

Sun,

2024

Small

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Photocatalytic CO2 reduction technology, capable of converting low‐density solar energy into high‐density chemical energy, stands as a promising approach to alleviate the energy crisis and achieve carbon neutrality. Semiconductor metal oxides, characterized by their abundant reserves, good stability, and easily tunable structures, have found extensive applications in the field of photocatalysis. However, the wide bandgap inherent in metal oxides contributes to their poor efficiency in photocatalytic CO2 reduction. Defect engineering presents an effective strategy to address these challenges. This paper reviews the research progress in defect engineering to enhance the photocatalytic CO2 reduction performance of metal oxides, summarizing defect classifications, preparation methods, and characterization techniques. The focus is on defect engineering, represented by vacancies and doping, for improving the performance of metal oxide photocatalysts. This includes advancements in expanding the photoresponse range, enhancing photogenerated charge separation, and promoting CO2 molecule activation. Finally, the paper provides a summary of the current issues and challenges faced by defect engineering, along with a prospective outlook on the future development of photocatalytic CO2 reduction technology.

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Effect of the phase structure on the catalytic activity of MoO₃ and potential application for indoor clearance

Abstract: The big Jahn–Teller distortion of α-MoO3 results in a high CWAO activity.

Cited by 18 publications

References 57 publications

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO₄

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO₄

Recent Advances in Rechargeable Metal–CO₂ Batteries with Nonaqueous Electrolytes

Advances in Defect Engineering of Metal Oxides for Photocatalytic CO₂ Reduction

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Effect of the phase structure on the catalytic activity of MoO3 and potential application for indoor clearance

Abstract: The big Jahn–Teller distortion of α-MoO3 results in a high CWAO activity.

Cited by 18 publications

References 57 publications

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO4

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO4

Recent Advances in Rechargeable Metal–CO2 Batteries with Nonaqueous Electrolytes

Advances in Defect Engineering of Metal Oxides for Photocatalytic CO2 Reduction

Contact Info

Product

Resources

About

Effect of the phase structure on the catalytic activity of MoO₃ and potential application for indoor clearance

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO₄

Selective Oxidation of Furfural to 2(5H)-Furanone and Maleic Acid over CuMoO₄

Recent Advances in Rechargeable Metal–CO₂ Batteries with Nonaqueous Electrolytes

Advances in Defect Engineering of Metal Oxides for Photocatalytic CO₂ Reduction