Interface engineered perovskite oxides for enhanced catalytic oxidation: The vital role of lattice oxygen

Ma, Xue; Li, Ximu; Su, Chao; Zhu, Ming; Miao, Jie; Guan, Daqin; Zhou, Wei; Shao, Zongping

doi:10.1016/j.ces.2021.116944

Cited by 30 publications

(6 citation statements)

References 37 publications

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“…For example, Solís et al, 23 using 500 mg L −1 LaCoO 3 for the degradation of various herbicides through PMS activation, observed that in acidic conditions (pH = 3) after 180 min, the concentration of Co 2+ ions was relatively high (10 mg L −1 ). Similarly, Ma et al 58 reported that, at neutral pH using 200 mg L −1 LaNiO 3 to remove Rhodamine B through PMS activation, they observed at the end of the catalytic experiment (20 min) the concentration of Ni 2+ was 0.5 mg L −1 . In general, ion leaching causes changes to the perovskite's surface chemical composition, damaging its crystal framework and affecting the perovskite's reusability.…”

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confidence: 76%

“…The results of the scavenging experiments agree with the existing literature. Specifically, 1 O 2 was reported as the dominant ROS for PMS activation by La x NiO 3 , 58 in addition to • OH and SO 4 •‐ . Additionally, as reported elsewhere, 61 concentrations of • OH and SO 4 •‐ produced after activation of PMS by CeCu 0.5 Co 0.5 O 3 perovskite at 180 min were found to be 0.52 and 10.91 μmol L −1 , respectively.…”

Section: Catalytic Testingmentioning

confidence: 99%

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Synthesis and characterization of LaCo_xNi_1‐xO₃ perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Latsiou

Lykos

Bairamis

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND During the last few years, perovskite materials have been widely investigated as catalysts for peroxymonosulfate (PMS) and persulfate (PS) activation in advanced oxidation processes (AOPs) for the degradation of various pollutants. In the present work, a sequence of LaCoxNi1‐xO3 (x = 0, 0.25, 0.50, 0.75, 1) perovskite materials was synthesized by sol–gel method using glycolic acid ethoxylate lauryl ether anionic surfactant as soft template. RESULTS The physicochemical properties of the prepared materials were studied by several techniques, such as N2 porosimetry, Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR FT‐IR), X‐Ray Diffraction (XRD), X‐Ray Fluorescence (XRF), X‐Ray Photoelectron Spectroscopy (XPS), and Scanning Electron Microscopy (SEM). The catalytic activity towards phenolic degradation by persulfate (PS) activation was studied and, based on the reaction rate constant values, the order of increasing catalytic performance was LaCoO3 < LaCo0.75Ni0.25O3 < LaCo0.5Ni0.5O3 < LaCo0.25Ni0.75O3 < LaNiO3. The perovskites that exhibited optimal catalytic activity (i.e., LaCo0.25Ni0.75O3 and LaNiO3) were further evaluated for their stability, reusability, and catalytic mechanism. Finally, according to scavenging experiments, 1O2, SO4•‐, and •OH generated with 1O2 played the dominant role in phenolic degradation. CONCLUSION The substitution of Co by Ni in LaCoO3 materials showed an increase in their catalytic activity towards phenolic oxidation through persulfate activation. The results provide insights into the characterization and mechanisms of novel perovskite catalysts and their applications for the removal of organic pollutants by advanced oxidation processes (AOPs). Further studies improving the stability and reusability of the catalysts should be conducted. © 2022 Society of Chemical Industry (SCI).

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confidence: 76%

Section: Catalytic Testingmentioning

confidence: 99%

Synthesis and characterization of LaCo_xNi_1‐xO₃ perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Latsiou

Lykos

Bairamis

et al. 2022

J of Chemical Tech & Biotech

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“…The anisotropy of the Ni-Fe crystal structure could increase the local oxygen vacancy concentration on the perovskite surface [20]. The increase in the number of oxygen vacancies facilitates the migration of lattice oxygen and enhances the catalytic activity [21][22][23][24].…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Study of the Structure and Catalytic Activity of B-Site Doping Perovskite for an Inferior Anthracite Coal Combustion

et al. 2023

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The unique structure and physical properties of perovskite-type catalysts make them highly promising for catalyzing efficient coal combustion. Mesoporous perovskite LaNixFe1−xO3 (x = 0.2, 0.4, 0.6, 0.8) coal combustion catalysts were synthesized using the sol–gel method. The effects of the doping amount of B-site doped nickel on both the crystal structure and catalytic performance were investigated. X-ray diffraction, scanning electron microscopy, and nitrogen adsorption–desorption tests were used to characterize the catalyst samples. Thermogravimetric analysis (TG) and activation energy (Ea) calculations were used to assess the catalyst’s activity for the catalytic combustion of anthracite coal (JF coal, originating from Shanxi, China). Results revealed that nickel doping created lattice distortion and Ni-Fe alloy interactions. The difference in nickel doping significantly affects the morphology and catalytic activity of perovskite. The addition of LaNi0.6Fe0.4O3 (NI6) with a mass fraction of 5% resulted in the highest average burning rate value (va = 4.52%/min) of JF coal among all synthesized catalysts. The Ea of JF coal catalytic combustion, calculated using the Coats–Redfern method and the Doyle method, showed a good agreement with the TG curves. The LaNixFe1-xO3 series catalysts were found to significantly decrease the Ea of JF coal combustion, with a maximum reduction of 42% compared to the case without any catalyst added. Among the synthesized catalysts, NI6 exhibited a favorable catalytic combustion performance and is thus a promising candidate for the clean and efficient utilization of coal resources.

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“…The reoxidation of Ni/La 2 O 3 resulted back the recovery of most of the LaNiO 3 . Xue Ma et al attempted to synthesize A-site excess and B-site deficient La x NiO 3 (x = 1, 1.1, 1.15, 1.2) and obtained biphasic materials containing both LaNiO 3 and La 2 NiO 4 phases [16]. Andressa et al made LaNiO 3 by combustion method and TPR in pure hydrogen resulted in Ni(III) to Ni(II) reduction(La 2 NiO 4 ) at 673 K and further to metallic Ni/La 2 O 3 mixture at 773 K [17].…”

Section: Introductionmentioning

confidence: 99%

“…Although various sol-gel, solid-state, hydrothermal, and template-assisted synthetic approaches to prepare LaNiO 3 [11,14,[18][19][20][21] and La 2 NiO 4 [13,16,22,23] have been reported, the simultaneous preparation of both the LaNiO 3 and La 2 NiO 4 phases from a single precursor using a combinatorial approach comprising hydrothermal and varied annealing atmospheres and temperatures is presented in this study. To the best of our knowledge, this is the first report where two different, more importantly stable phases were synthesized from a La/Ni precursor composition, by a mere change in the annealing conditions.…”

Section: Introductionmentioning

confidence: 99%

Controlling phase transformation of La/Ni oxides by switching annealing conditions and their resultant pseudocapacitive behaviour

Gopi,

Reddi,

Karthik

et al. 2023

Nanotechnology

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Annealing step is a critical step in the hydrothermal assisted synthesis of La/Ni oxides such as LaNiO3−δ (LNOA) and La2NiO4+δ (LNON). In the current study, we have discovered the interlink between the atmosphere and temperature conditions which dictate the product formed. La/Ni nitrate precursors were subjected to a hydrothermal synthesis followed by an annealing step at appropriate temperature and varying atmosphere resulting in the synthesis of the corresponding oxides. The annealing temperature was varied in the range between 650 °C and 800 °C and also the annealing was carried out either in pure N2 atmosphere or air. From the x-ray diffraction analysis, it was inferred that annealing in air invariably resulted in the rhombohedral LaNiO3 (LNOA) perovskite phase, while annealing in N2 atmosphere resulted in an orthorhombic Ruddlesden–Popper phase La2NiO4 (LNON), a layered oxide containing traces of NiO phase. Typically, iodometric titrations substantiate the presence of Ni (III) which further can be correlated to the presence of oxygen vacancies (δ). Iodometric test results demarcated the difference between the two phases with absolutely minimal I2 liberated from the LNON samples proving that negligible amount of Ni (III) was present in LNON Scanning electron microscopy (SEM) images showed an agglomeration of particles annealed at higher temperatures irrespective of the atmosphere. Temperature dependent oxygen non-stoichiometry (Δδ) was analyzed through thermogravimetric analysis, wherein Δδ was inversely proportional to the annealing temperature for all of the LNOA samples. Considering that large δ values favor pseudocapacitive behaviour, it was observed LNOA oxides showed excellent pseudocapacitive behaviour compared to the LNON oxides. Dunn deconvolution of the cyclic voltammograms of LNOA 800 °C at 5 m Vs−1 indicated that diffusive contribution (66%) was predominant over capacitive contributions. The LNOA sample annealed at 800 °C displayed the highest specific capacitance of 100.3 F g−1 at 1 A g−1 current density.

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Interface engineered perovskite oxides for enhanced catalytic oxidation: The vital role of lattice oxygen

Cited by 30 publications

References 37 publications

Synthesis and characterization of LaCo_xNi_1‐xO₃ perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Synthesis and characterization of LaCo_xNi_1‐xO₃ perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Study of the Structure and Catalytic Activity of B-Site Doping Perovskite for an Inferior Anthracite Coal Combustion

Controlling phase transformation of La/Ni oxides by switching annealing conditions and their resultant pseudocapacitive behaviour

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Interface engineered perovskite oxides for enhanced catalytic oxidation: The vital role of lattice oxygen

Cited by 30 publications

References 37 publications

Synthesis and characterization of LaCoxNi1‐xO3 perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Synthesis and characterization of LaCoxNi1‐xO3 perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Study of the Structure and Catalytic Activity of B-Site Doping Perovskite for an Inferior Anthracite Coal Combustion

Controlling phase transformation of La/Ni oxides by switching annealing conditions and their resultant pseudocapacitive behaviour

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Synthesis and characterization of LaCo_xNi_1‐xO₃ perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation

Synthesis and characterization of LaCo_xNi_1‐xO₃ perovskites as heterogeneous catalysts for phenolics degradation by persulfate activation