Cu single-atoms embedded in porous carbon nitride for selective oxidation of methane to oxygenates

2020 ◽  
Vol 56 (93) ◽  
pp. 14677-14680
Author(s):  
Bo Wu ◽  
Ruoou Yang ◽  
Lei Shi ◽  
Tiejun Lin ◽  
Xing Yu ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
High Activity ◽  
Selective Oxidation ◽  
Porous Carbon ◽  
Methane Conversion ◽  
Active Sites ◽  
Carbon Nitride ◽  
Single Atoms ◽  
Oxidation Of Methane

Cu-SAs/C3N4 with Cu–N4 as active sites exhibited high activity and high oxygenate selectivity for methane conversion at ambient temperature.

Spatially Confined Formation of Single Atoms in Highly Porous Carbon Nitride Nanoreactors

ACS Nano ◽  
2021 ◽  
Author(s):  
Yunpeng Zuo ◽  
Tingting Li ◽  
Ning Zhang ◽  
Tianyun Jing ◽  
Dewei Rao ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Nitride ◽  
Single Atoms ◽  
Highly Porous

A mutually isolated nanodiamond/porous carbon nitride nanosheet hybrid with enriched active sites for promoted catalysis in styrene production

2020 ◽  
Vol 10 (4) ◽  
pp. 1048-1055 ◽  
Author(s):  
Guifang Ge ◽  
Xinwen Guo ◽  
Chunshan Song ◽  
Zhongkui Zhao
Keyword(s):  
Molten Salt ◽  
Energy Saving ◽  
Porous Carbon ◽  
Active Sites ◽  
Carbon Nitride ◽  
Catalytic Sites ◽  
Styrene Production

A mutually isolated nanodiamond/porous carbon nitride nanosheet hybrid with enriched catalytic sites is fabricated by a facile two-step molten salt-oxidation strategy, generating an excellent catalyst for clean and energy-saving styrene production.

Evolution of active sites during selective oxidation of methane to methanol over Cu-CHA and Cu-MOR zeolites as monitored by operando XAS

2019 ◽  
Vol 333 ◽  
pp. 17-27 ◽  
Author(s):  
Elisa Borfecchia ◽  
Dimitrios K. Pappas ◽  
Michael Dyballa ◽  
Kirill A. Lomachenko ◽  
Chiara Negri ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Active Sites ◽  
Oxidation Of Methane ◽  
Operando Xas

Visible light-driven simultaneous H2 production by water splitting coupled with selective oxidation of HMF to DFF catalyzed by porous carbon nitride

2019 ◽  
Vol 7 (10) ◽  
pp. 5643-5649 ◽  
Author(s):  
Venugopala Rao Battula ◽  
Arpna Jaryal ◽  
Kamalakannan Kailasam
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Selective Oxidation ◽  
Porous Carbon ◽  
Carbon Nitride ◽  
H2 Production ◽  
Biomass Valorization ◽  
Simultaneous Production ◽  
Visible Light Driven

Simultaneous H2 evolution and biomass valorization under visible light. Simultaneous production of H2 at a rate of 36 μmol h−1 m−2 and 38.4% DFF yield (>99% selectivity) after 48 h.

scholarly journals Esterification Product Protection Strategies for Direct and Selective Methane Conversion

2021 ◽  
Vol 75 (4) ◽  
pp. 305-310
Author(s):  
Andrea N. Blankenship ◽  
Manoj Ravi ◽  
Jeroen A. van Bokhoven
Keyword(s):  
Methyl Ester ◽  
Selective Oxidation ◽  
Methane Conversion ◽  
High Performance ◽  
Oxidation Of Methane ◽  
Creative Solutions ◽  
Protection Strategies ◽  
Product Protection ◽  
High Yields ◽  
Future Work

A scale-flexible process for the direct and selective oxidation of methane to primary oxygenates is of great interest, however, a commercially feasible approach has yet to be realized due to a number of challenges. Low product yields imposed by a well-established selectivity-conversion limit are particularly burdensome for direct methane-to-methanol chemistry. One strategy that has emerged to break out of this limit is the in situ esterification of produced methanol to the more oxidation-resistant methyl ester. However, these methaneto-methyl-ester approaches still elude commercialization despite their unprecedented high yields. Herein, we outline some of the key barriers that hinder the commercial prospects of this otherwise promising route for highyield direct catalytic methane conversion, including extremely corrosive reagents, homogeneous catalysts, and inviable oxidants. We then highlight directions to address these challenges while maintaining the characteristic high performance of these systems. These discussions support the efficacy of product protection strategies for the direct, selective oxidation of methane and encourage future work in developing creative solutions to merge this promising chemistry with more practical industrial requirements.

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.

Optically and Electrocatalytically Decoupled Si Photocathodes with a Porous Carbon Nitride Catalyst for Nitrogen Reduction with Over 61.8% Faradaic Efficiency

2021 ◽  
pp. 2100812
Author(s):  
Karthik Peramaiah ◽  
Vinoth Ramalingam ◽  
Hui‐Chun Fu ◽  
Merfat M. Alsabban ◽  
Rafia Ahmad ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Nitride ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction
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