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.

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.

Dissolution and Performing Homogeneous Photocatalysis of Polymeric Carbon Nitride

2018 ◽  
Author(s):  
Chaofeng Huang ◽  
Jing Wen ◽  
Yanfei Shen ◽  
Fei He ◽  
Li Mi ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Carbon Nitride ◽  
Heterogeneous Catalysts ◽  
Methane Sulfonic Acid ◽  
Environment Friendly ◽  
The Poor ◽  
Catalytic Sites ◽  
Homogeneous Photocatalysis ◽  
Polymeric Carbon ◽  
First Time

<a></a><a>As a metal-free conjugated polymer, carbon nitride (CN) has attracted tremendous attention as heterogeneous (photo)catalysts. </a><a></a><a>By following prototype of enzymes, making all catalytic sites of accessible via homogeneous reactions is a promising approach toward maximizing CN activity, but hindered due to </a><a></a><a>the poor insolubility of CN</a>. Herein, we report the dissolution of CN in environment-friendly methane sulfonic acid and the homogeneous photocatalysis driven by CN for the first time with the activity boosted up to 10-times, comparing to the heterogeneous counterparts. Moreover, facile recycling and reusability, the <a>hallmark</a> of heterogeneous catalysts, were kept for the homogeneous CN photocatalyst via reversible precipitation using poor solvents. It opens new vista of CN in homogeneous catalysis and offers a successful example of polymeric catalysts in bridging gaps of homo/heterogeneous catalysis.

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

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

scholarly journals Insights on forming N,O-coordinated Cu single-atom catalysts for electrochemical reduction CO2 to methane

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yanming Cai ◽  
Jiaju Fu ◽  
Yang Zhou ◽  
Yu-Chung Chang ◽  
Qianhao Min ◽  
...  
Keyword(s):  
Energy Barrier ◽  
Active Sites ◽  
Theoretical Calculations ◽  
High Energy ◽  
Single Atom ◽  
Faradaic Efficiency ◽  
High Energy Barrier ◽  
Catalytic Sites ◽  
Electron Reduction ◽  
First Time

AbstractSingle-atom catalysts (SACs) are promising candidates to catalyze electrochemical CO2 reduction (ECR) due to maximized atomic utilization. However, products are usually limited to CO instead of hydrocarbons or oxygenates due to unfavorable high energy barrier for further electron transfer on synthesized single atom catalytic sites. Here we report a novel partial-carbonization strategy to modify the electronic structures of center atoms on SACs for lowering the overall endothermic energy of key intermediates. A carbon-dots-based SAC margined with unique CuN2O2 sites was synthesized for the first time. The introduction of oxygen ligands brings remarkably high Faradaic efficiency (78%) and selectivity (99% of ECR products) for electrochemical converting CO2 to CH4 with current density of 40 mA·cm-2 in aqueous electrolytes, surpassing most reported SACs which stop at two-electron reduction. Theoretical calculations further revealed that the high selectivity and activity on CuN2O2 active sites are due to the proper elevated CH4 and H2 energy barrier and fine-tuned electronic structure of Cu active sites.

Sign in / Sign up

Export Citation Format

Share Document