Activation of Peroxydisulfate Using N-doped carbon-encapsulated Ni species for efficient degradation of tetracycline

2021 ◽  
pp. 119369
Author(s):  
Yi Wang ◽  
Qingjie Ji ◽  
Jixiang Xu ◽  
Jun Wan ◽  
Lei Wang
Keyword(s):  
Ni Species

scholarly journals Oscillatory Behaviour of Ni Supported on ZrO2 in the Catalytic Partial Oxidation of Methane as Determined by Activation Procedure

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2495
Author(s):  
Daniela Pietrogiacomi ◽  
Maria Cristina Campa ◽  
Ida Pettiti ◽  
Simonetta Tuti ◽  
Giulia Luccisano ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Partial Oxidation ◽  
Active Sites ◽  
Direct Reduction ◽  
Partial Oxidation Of Methane ◽  
Catalytic Partial Oxidation ◽  
Oxidation Of Methane ◽  
Short Contact Time ◽  
Oxidation Reduction ◽  
Ni Species

Ni/ZrO2 catalysts, active and selective for the catalytic partial oxidation of methane to syngas (CH4-CPO), were prepared by the dry impregnation of zirconium oxyhydroxide (Zhy) or monoclinic ZrO2 (Zm), calcination at 1173 K and activation by different procedures: oxidation-reduction (ox-red) or direct reduction (red). The characterization included XRD, FESEM, in situ FTIR and Raman spectroscopies, TPR, and specific surface area measurements. Catalytic activity experiments were carried out in a flow apparatus with a mixture of CH4:O2 = 2:1 in a short contact time. Compared to Zm, Zhy favoured the formation of smaller NiO particles, implying a higher number of Ni sites strongly interacting with the support. In all the activated Ni/ZrO2 catalysts, the Ni–ZrO2 interaction was strong enough to limit Ni aggregation during the catalytic runs. The catalytic activity depended on the activation procedures; the ox-red treatment yielded very active and stable catalysts, whereas the red treatment yielded catalysts with oscillating activity, ascribed to the formation of Niδ+ carbide-like species. The results suggested that Ni dispersion was not the main factor affecting the activity, and that active sites for CH4-CPO could be Ni species at the boundary of the metal particles in a specific configuration and nuclearity.

Highly Efficient Al-Doped Ni–Mn–O Catalysts for Auto-Thermal Reforming of Acetic Acid: Role of MnAl2O4 for Stability of Ni Species

2020 ◽  
Vol 34 (11) ◽  
pp. 14647-14655
Author(s):  
Yuxin Song ◽  
Boquan Chen ◽  
Xiaomin Hu ◽  
Qiao Wang ◽  
Xingyue Xie ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Highly Efficient ◽  
Ni Species

scholarly journals Catalytic Elimination of Carbon Monoxide, Ethyl Acetate, and Toluene over the Ni/OMS-2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 581
Author(s):  
Ning Dong ◽  
Mengyue Chen ◽  
Qing Ye ◽  
Dan Zhang ◽  
Hongxing Dai
Keyword(s):  
Ethyl Acetate ◽  
Molecular Sieve ◽  
Space Velocity ◽  
Oxidation Of Co ◽  
Toluene Oxidation ◽  
Catalytic Activities ◽  
Catalytic Mechanisms ◽  
Ni Species ◽  
Synthesized Materials ◽  
Incorporation Method

The Ni-loaded cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2) catalysts (xNi/OMS-2: x = 1, 3, 5, and 10 wt%) were prepared by a pre-incorporation method. Physicochemical properties of the as-synthesized materials were characterized by means of various techniques, and their catalytic activities for CO, ethyl acetate, and toluene oxidation were evaluated.The loading of Ni played an important role in improving physicochemical propertiesof OMS-2. Among all of the samples, 5Ni/OMS-2 exhibited the best catalytic activity, with the T90 being 155 °C for CO oxidation at a space velocity (SV) of 60,000 mL/(g·h), 225°C for ethyl acetate oxidation at an SV of 240,000 mL/(g·h), and 300 °C for toluene oxidation at an SV of 240,000 mL/(g·h), which was due to its high Mn3+ content and Oads concentration, good low-temperature reducibility and lattice oxygen mobility, and strong interaction between the Ni species and the OMS-2 support. In addition, catalytic mechanisms of the oxidation of three pollutants over 5Ni/OMS-2 were also studied. The oxidation of CO, ethyl acetate, and toluene over the catalysts took place first via the activated adsorption, then intermediates formation, and finally complete conversion of the formed intermediates to CO2 and H2O.

Fe and Cu dual-doped Ni3S4 nanoarray with less low-valence Ni species for boosting water oxidation reaction

2022 ◽  
Author(s):  
Xiaoqiang Du ◽  
Jiaxin Li ◽  
Xiaoshuang Zhang
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
High Efficiency ◽  
Ni Foam ◽  
Metal Materials ◽  
Ni Species ◽  
Co Doped

Transition metal materials with high efficiency and durable electrocatalytic water splitting activity have aroused widespread concern among scientists. In this work, two cation co-doped Ni3S4 nanoarrays grown on Ni foam...

Improved Photoactivities of Large‐surface‐area g‐C 3 N 4 for CO 2 Conversion by Controllably Introducing Co‐ and Ni‐Species to Effectively Modulate Photogenerated Charges

ChemCatChem ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 6282-6287 ◽  
Author(s):  
Xuliang Zhang ◽  
Xinxin Zhang ◽  
Wajid Ali ◽  
Xiaowei Chen ◽  
Kang Hu ◽  
...  
Keyword(s):  
Surface Area ◽  
Large Surface Area ◽  
Ni Species

Catalytic Properties of Ni/CNTs and Ca-Promoted Ni/CNTs for Methanation Reaction of Carbon Dioxide

2014 ◽  
Vol 924 ◽  
pp. 217-226 ◽  
Author(s):  
Xiang Feng Hu ◽  
Wen Yang ◽  
Ning Wang ◽  
Shi Zhong Luo ◽  
Wei Chu
Keyword(s):  
Carbon Dioxide ◽  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Catalytic Properties ◽  
Supported Catalyst ◽  
Catalytic Performance ◽  
Impregnation Method ◽  
Methanation Reaction ◽  
Ni Species ◽  
Nickel Species

Nickel/carbon nanotubes (Ni/CNTs), Nickel/alumina (Ni/Al2O3), calcium-promoted Ni/CNTs and calcium-promoted Ni/Al2O3 were synthesized by impregnation method. Methanation of carbon dioxide was used as a probe to evaluate their catalytic performance. The features of these Ni-based catalysts were investigated via XRD, H2-TPR, H2-TPD and the N2 adsorptiondesorption isotherms. H2-TPR showed that nickel species on Ni/CNTs was reduced more easily with respect to that on Ni/Al2O3, and addition of Ca can increase the content of easily reducible Ni species for Ni/CNTs. XRD and H2-TPD indicated that addition of Ca promoted dispersion for CNTs-supported catalyst. These finding ultimately enhanced catalytic activity and stability for Ni/CNTs catalyst modified with Ca.

scholarly journals Precursors of active Ni species in Ni/Al2O3 catalysts for oxidative dehydrogenation of ethane

2013 ◽  
Vol 34 (10) ◽  
pp. 1905-1913 ◽  
Author(s):  
Lucie Smoláková ◽  
Šárka Botková ◽  
Libor Čapek ◽  
Peter Priecel ◽  
Agnieszka Sołtysek ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Oxidative Dehydrogenation Of Ethane ◽  
Ni Species

X-ray absorption fine structure (XAFS) analyses of Ni species trapped in graphene sheet of carbon nanofibers

2006 ◽  
Vol 73 (14) ◽  
Author(s):  
Mayuko Ushiro ◽  
Kanae Uno ◽  
Takashi Fujikawa ◽  
Yoshinori Sato ◽  
Kazuyuki Tohji ◽  
...  
Keyword(s):  
Fine Structure ◽  
Graphene Sheet ◽  
Carbon Nanofibers ◽  
X Ray ◽  
Absorption Fine ◽  
Ni Species ◽  
X Ray Absorption

A novel promoting effect of chelating ligand on the dispersion of Ni species over Ni/SBA-15 catalyst for dry reforming of methane

2017 ◽  
Vol 42 (20) ◽  
pp. 14103-14114 ◽  
Author(s):  
Qiulin Zhang ◽  
Kaixian Long ◽  
Jing Wang ◽  
Tengfei Zhang ◽  
Zhongxian Song ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Promoting Effect ◽  
Chelating Ligand ◽  
Ni Species

Ni3[Fe(CN)6]2 nanocubes boost the catalytic activity of Pt for electrochemical hydrogen evolution

2018 ◽  
Vol 5 (7) ◽  
pp. 1683-1689 ◽  
Author(s):  
Xiao Zhang ◽  
Pei Liu ◽  
Yanfang Sun ◽  
Tianrong Zhan ◽  
Qingyun Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Kinetics ◽  
Hydrogen Evolution ◽  
Alkaline Media ◽  
Water Dissociation ◽  
Acidic And Alkaline Media ◽  
Ni Species ◽  
Low Pt Loading ◽  
Kinetics Of

Hybrid electrocatalyst of ultrafine Pt particles anchored on a Ni3[Fe(CN)6]2 nanocube with low Pt loading of 4.0% is designed for HERs, and superior catalytic activity is obtained in both acidic and alkaline media because the Ni species remarkably facilitates the reaction kinetics of water dissociation and thus improves HER activity.

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