Journal: Applied Catalysis B: Environmental

Abbreviation

Appl. catal., B Environ.

Publisher

Elsevier

Journal Volumes

ISSN

1873-3883
0926-3373

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Publications 1 - 10 of 70
  • Influence of NO2 on the hydrolysis of isocyanic acid over TiO2
    Item type: Journal Article
    Piazzesi, Gaia; Kröcher, Oliver; Elsener, Martin; et al. (2006)
    Applied Catalysis B: Environmental
  • Impact of feed impurities on catalysts for chlorine recycling
    Item type: Journal Article
    Moser, Maximilian; Amrute, Amol P.; Pérez-Ramírez, Javier (2015)
    Applied Catalysis B: Environmental
  • In situ Study of Low-temperature Dry Reforming of Methane Over La2Ce2O7 and LaNiO3 Mixed Oxides
    Item type: Journal Article
    Ramon, Adriana P.; Li, Xiansheng; Clark, Adam H.; et al. (2022)
    Applied Catalysis B: Environmental
    Dry reforming of methane (DRM) is a promising process to generate synthetic gas with a low H2/CO ratio. The main issues in DRM are the deposition of carbon over the catalyst and active metal sintering. Pyrochlores and perovskites are stable materials with properties that can overcome these challenges due to the presence of well dispersed active metal and oxygen vacancies. La2Ce2O7 and LaNiO3 mixed oxides containing 5 wt% of nickel were synthesized by modified Pechini and hydrothermal methods. The reduction of the La2Ce2O7 and LaNiO3 mixed materials was followed by in situ X-ray diffraction, ambient pressure X-ray photoelectron spectroscopy (APXPS), and X-ray absorption near edge structure. An oxygen-deficient perovskite La2Ni2O5 was identified already at room temperature. Both catalysts were stable during the performance test at low-(600 °C) and high-(850 °C) temperature DRM reaction, thanks to a negligible carbon accumulation on the catalyst surface. The high amount of electrophilic oxygen species, oxygen vacancies and basic sites detected correlates with the high catalytic activity. The material synthesized by hydrothermal method showed the highest conversion and yield. The better performance in this catalyst was related to higher amount of intermediate basic sites, oxygen vacancies and greater interaction between nickel and cerium. The reaction mechanism proposed in these materials takes into account the intermediates CHx and adsorbed O/OH, which were observed by means of APXPS.
  • Influence of Ba precursor on structural and catalytic properties of Pt-Ba/alumina NOx storage-reduction catalyst
    Item type: Journal Article
    Maeda, Nobutaka; Urakawa, Atsushi; Sharma, Renu; et al. (2011)
    Applied Catalysis B: Environmental
  • Efficient magnetic hybrid ZnO-based photocatalysts for visible-light-driven removal of toxic cyanobacteria blooms and cyanotoxins
    Item type: Journal Article
    Serrà, Albert; Pip, Petai; Gómez, Elvira; et al. (2020)
    Applied Catalysis B: Environmental
    A hybrid magnetic-ZnO-based photocatalyst platform is designed for the efficient and simultaneous sunlight-driven photoremoval of cyanobacteria and mineralization of cyanotoxins (anatoxin-A). The photocatalyst killing ability was evaluated against two types of microalgae with different morphology and toxicity, Spirulina platensis paracas and Anabaena flos-aquae. The hybrid photocatalyst Ni@ZnO@ZnS-Spirulina was synthetized by means of a multistep process using Spirulina as biotemplate. The effects of reactor geometry, magnetic actuation, and concordant architecture on photokilling ability were tested. Moreover, the prepared photocatalysts were demonstrated to be effective for the anatoxin-A degradation under artificial sunlight. In the interest of reducing waste content and optimizing resources, photocatalyst recycling after their useful lifetime has ended is proposed through the fabrication of microalgal biofuel-pellets. This inexpensive circular process involves multi-functional algae-based photocatalysts applied to the simultaneous destruction of algae blooms and cyanotoxins and then recycled to close the circle through cultivating biotemplates.
  • In situ fabrication of 1D CdS nanorod/2D Ti3C2 MXene nanosheet Schottky heterojunction toward enhanced photocatalytic hydrogen evolution
    Item type: Journal Article
    Xiao, Rong; Zhao, Chengxiao; Zou, Zhaoyong; et al. (2020)
    Applied Catalysis B: Environmental
  • Flame-made WO3/TiO2 nanoparticles
    Item type: Journal Article
    Akurati, Kranthi K.; Vital, Andri; Dellemann, Jean-Philippe; et al. (2008)
    Applied Catalysis B: Environmental
  • Impact of hybrid CO2-CO feeds on methanol synthesis over In2O3-based catalysts
    Item type: Journal Article
    Araújo, Thaylan P.; Shah, Arjun; Mondelli, Cecilia; et al. (2021)
    Applied Catalysis B: Environmental
    Catalysts for CO2-to-methanol are typically evaluated in a single-pass regime using pure CO2streams. In a practical process however, CO shall be present as a feed impurity or as a recycled byproduct. Herein, the sensitivity to CO was evaluated on In2O3 catalysts in bulk, supported, or metal-promoted forms, using cycle experiments with variable CO2 and CO contents at H2/(CO + CO2) = 4. The methanol productivity was decreased (−20-−40 %) on all catalysts except In2O3/monoclinic-ZrO2, the activity of which was boosted by 10 %. In-depth characterization of the catalysts uncovered controlled formation of oxygen vacancies and resistance to sintering as the main reasons for the activation of the latter and an interplay of CO/H2O-induced sintering and CO inhibition as the origin of performance loss. Focusing on the most representative systems, operation protocols were explored to maximize their methanol yield. We emphasize that assessment with hybrid CO2-CO feeds is key for the design of industrially-viable catalysts for sustainable methanol production.
  • High atom utility of robust Ca-Co bimetallic catalyst for efficient Fenton-like catalysis in advanced oxidation processes
    Item type: Journal Article
    Mao, Xuanzhi; Wang, Minglei; Li, Ji; et al. (2023)
    Applied Catalysis B: Environmental
    A durable catalyst composed of Ca-Co bimetallic complex structures on a large-scale substrate was fabricated for efficient activation of peroxymonosulfate (PMS) in organic pollutant degradation. Specifically, amidoxime groups were introduced onto the polymer substrate via radiation-induced graft polymerization (RIGP), followed by selective adsorption of Ca2+ and Co2+ ions. The catalyst demonstrated high effectiveness and stability in degrading 10 mg/L of tetracycline hydrochloride within 8 min by activating PMS under a broad pH range of 3–9. Structural characterization and density functional theory (DFT) calculations confirmed the precise doping of Ca2+, which regulated the energy level and enhanced the dispersion of Co2+. The combination of bulk substrates and fine structural control in catalytic process provided new ideas for the design of similar catalysts.
  • CO2 hydrogenation to methanol on tungsten-doped Cu/CeO2 catalysts
    Item type: Journal Article
    Yan, Yong; Wong, Roong Jien; Ma, Zhirui; et al. (2022)
    Applied Catalysis B: Environmental
    The catalytic hydrogenation of CO2 to methanol depends significantly on the structures of metal-oxide interfaces. We show that doping a high-valency metal, viz. tungsten, to CeO2 could render improved catalytic activity for the hydrogenation of CO2 on a Cu/CeW0.25Ox catalyst, whilst making it more selective towards methanol than the undoped Cu/CeO2. We experimentally investigated and elucidated the structural-functional relationship of the Cu/CeO2 interface for CO2 hydrogenation. The promotional effects are attributed to the irreversible reduction of Ce4+ to Ce3+ by W-doping, the suppression of the formation of redox-active oxygen vacancies on CeO2, and the activation of the formate pathway for CO2 hydrogenation. This catalyst design strategy differs fundamentally from those commonly used for CeO2-supported catalysts, in which oxygen vacancies with high redox activity are considered desirable.
Publications 1 - 10 of 70