Novel lignin-based single atom catalysts as peroxymonosulfate activator for pollutants degradation: Role of single cobalt and electron transfer pathway

Qi, Yuanfeng; Li, Jing; Zhang, Yanqing; Cao, Qi; Si, Yanmei; Wu, Zhiren; Akram, Muhammad; Xu, Xing

doi:10.1016/j.apcatb.2021.119910

Cited by 257 publications

(66 citation statements)

References 68 publications

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“…Qi et al [121] used lignin as a carbon carrier. A one-pot pyrolysis strategy was used to prepare a nitrogen-coordinated Co single-atom catalyst (SACo-N/C).…”

Section: Degradation Of Organic Pollutantsmentioning

confidence: 99%

Research Progress and Application of Single-Atom Catalysts: A Review

Wang²,

Liu

et al. 2021

Molecules

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Due to excellent performance properties such as strong activity and high selectivity, single-atom catalysts have been widely used in various catalytic reactions. Exploring the application of single-atom catalysts and elucidating their reaction mechanism has become a hot area of research. This article first introduces the structure and characteristics of single-atom catalysts, and then reviews recent preparation methods, characterization techniques, and applications of single-atom catalysts, including their application potential in electrochemistry and photocatalytic reactions. Finally, application prospects and future development directions of single-atom catalysts are outlined.

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“…Qi et al [121] used lignin as a carbon carrier. A one-pot pyrolysis strategy was used to prepare a nitrogen-coordinated Co single-atom catalyst (SACo-N/C).…”

Section: Degradation Of Organic Pollutantsmentioning

confidence: 99%

Research Progress and Application of Single-Atom Catalysts: A Review

Wang²,

Liu

et al. 2021

Molecules

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“…In the past decades, advanced oxidation processes (AOPs) have been widely utilized for the degradation of contaminants especially organics in wastewater. − In such processes, peroxides such as hydrogen peroxide (H 2 O 2 ), peroxymonosulfate (PMS), and peroxydisulfate (PDS) usually serve as the precursors of the reactive species that are responsible for the oxidation of pollutants. − As catalysts, transition metals (e.g., Fe, Co, Cu, Mn, and Mo) have received intensive attention because of the excellent catalytic efficiency and low energy demand. Previous studies have proposed that this catalytic reaction is normally driven by the redox cycle of M ( n +1)+ /M n + , accompanied by one-electron transfer between transition metals and peroxides .…”

Section: Introductionmentioning

confidence: 99%

New Insights into the Activation of Peracetic Acid by Co(II): Role of Co(II)-Peracetic Acid Complex as the Dominant Intermediate Oxidant

Zhao

et al. 2021

ACS EST Eng.

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The combination of Co(II) and peracetic acid (PAA) is an important alternative advanced oxidation process (AOPs), in which R-O • radicals including acetyloxyl radicals (CH 3 C(O)O • ) and acetylperoxyl radicals (CH 3 C(O)OO • ) have been considered to be the primary reactive species for the oxidative degradation of contaminants. However, it is still unclear how the active Co species participates in this process. In this study, we conduct a series of experiments including chemical probing, radical quenching, electron paramagnetic resonance (EPR), and Co(III) oxidation to investigate the degradation mechanism of contaminants in the Co(II)/PAA process, using bisphenol A (BPA) as target pollutant. On the basis of these results, we propose a Co(II)-PAA complex (Co(II)-OO(O)CCH 3 ) to be the primary reactive species, while R-O • radicals and Co(III) (available as dimeric Coperoxide species) derived from the decomposition of Co(II)-PAA complex are the minor contributors for the oxidation of BPA. Factors, including PAA concentration, Co(II) concentration, solution pH, inorganic anions, and natural organic matters (NOM), that might affect the oxidation performance of the Co(II)/PAA process were also investigated systematically. This study sheds new light on the mechanistic understanding of the Co(II)/PAA process for the oxidation of contaminants in water.

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“…However, as the main byproduct of the paper industry and biorefinery, it is usually treated as waste, causing serious environmental pollution and resource waste . Fortunately, it can be employed as an ideal carbon material precursor owing to the carbon content of lignin as high as 60%. − Zhou et al used a Co/Mn-lignin complex and dicyandiamide to prepare Co-Mn@NC catalysts by pyrolysis, which could oxidize biomass-derived 5-hydroxymethyl furfural to 2,5-furan dicarboxylic acid in an aqueous system containing O 2 with a yield of 96.1%. Wang et al prepared an ordered mesoporous carbon Ni@OMC catalyst by lignin as a carbon precursor to promote the hydrogenation of furfural into furfuryl alcohol with a yield of 91.0% and a selectivity of 98.6%.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Phase Catalytic Conversion of Ethanol to Higher Alcohols over NiSn Bimetallic Catalysts Encapsulated in Nitrogen-Doped Biorefinery Lignin-Based Carbon

Xing

Xue

et al. 2021

Ind. Eng. Chem. Res.

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An efficient and stable catalyst to produce higher alcohols with a higher heat value and cetane number and less corrosive to engines from aqueous ethanol is still facing challenges. Here, a novelty of NiSn bimetallic catalysts encapsulated in a nitrogen-doped lignin-based carbon material (NiSn@NC) was prepared by modified biorefinery lignin and further precisely coordinated with metal ions to form a lignin-metal supramolecular material followed by in situ calcining. Results showed that the optimized Ni20Sn1@NC catalyst exhibited a superior ethanol conversion (68.5%), a C4+ higher alcohol yield of 31.8%, and a ratio of iso to normal alcohol of 0.52. Moreover, it also exhibited excellent stability even after four-cycle runs. Structural analysis revealed that the Sn/N-doping lignin-based carbon material improved the Ni dispersion and basic site density, which adjusted efficiently the electronic structure of the metallic active site. Therefore, the NiSn@NC bimetallic catalysts showed satisfactory conversion and stability of aqueous ethanol upgrading to C4+ higher alcohols.

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Novel lignin-based single atom catalysts as peroxymonosulfate activator for pollutants degradation: Role of single cobalt and electron transfer pathway

Cited by 257 publications

References 68 publications

Research Progress and Application of Single-Atom Catalysts: A Review

Research Progress and Application of Single-Atom Catalysts: A Review

New Insights into the Activation of Peracetic Acid by Co(II): Role of Co(II)-Peracetic Acid Complex as the Dominant Intermediate Oxidant

Aqueous Phase Catalytic Conversion of Ethanol to Higher Alcohols over NiSn Bimetallic Catalysts Encapsulated in Nitrogen-Doped Biorefinery Lignin-Based Carbon

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