Theoretical Insights into Effective Electron Transfer towards CO2 Reduction at Electron-rich Sites on the BiOBr (001) Surfaces

2021 ◽  
Author(s):  
Xiao Chao Zhang ◽  
Tan Li ◽  
Xiushuai Guan ◽  
Changming Zhang ◽  
Rui Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electron Transfer ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Co2 Activation ◽  
Effective Electron ◽  
Electron Migration ◽  
Carbon Dioxide Co2 ◽  
Co2 Reduction Reaction

Carbon dioxide (CO2) activation by effective electrons has been regarded as the rather necessary first-step for CO2 reduction reaction (CO2RR). Additionally, the electron migration and photoreaction selectivity are closely associated...

Hierarchical three-dimensional copper selenide nanocubes microelectrodes for improved carbon dioxide reduction reaction

2021 ◽  
Author(s):  
Rajasekaran Elakkiya ◽  
Govindhan Maduraiveeran
Keyword(s):  
Carbon Dioxide ◽  
High Performance ◽  
Three Dimensional ◽  
Co2 Reduction ◽  
Value Added ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Earth Abundant ◽  
Carbon Dioxide Co2 ◽  
Co2 Reduction Reaction

Design of high-performance and Earth-abundant electrocatalysts for electrochemical carbon dioxide (CO2) reduction reaction (CO2RR) into fuels and value-added chemicals offers an emergent pathway for environment and energy sustainable concerns. Herein,...

scholarly journals Generation of Fuel and Value-Added Chemicals from Carbon Dioxide (CO2)

2020 ◽  
Vol 12 (01) ◽  
pp. 41-44
Author(s):  
Pooja Srivastava
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Co2 Reduction ◽  
Value Added ◽  
Reduction Reaction ◽  
Long Term Effects ◽  
Industrial Chemicals ◽  
Continuous Increase ◽  
Carbon Dioxide Co2 ◽  
Co2 Reduction Reaction

Despite its life-threatening long term effects, the continuous increase of carbon dioxide (CO2) in the environment requires immediate actions to control the accelerating climate change. An appealing solution to this problem is to utilize CO2 as feedstock to generate useful chemicals, e.g., fuel, hydrocarbons, and valuable chemicals. The chemical inertness of CO2 needs considerably large energy for its conversion into useful chemicals. Therefore, CO2 reduction reaction requires an effective catalyst for its conversion into fuel (methanol, methane) and industrial chemicals (syngas, formic acid). Recently, two-dimensional layers of early transition metal carbides and nitrides, called MXene, have shown potential for catalysis due to its exposed transition metal sites, and mechanical and chemical stability at high temperatures. Herein, the author presents the MXene as a potential heterogeneous catalyst for the CO2 reduction reaction (CRR), and the future scope in this currently developing field.

Dual functions of CO2 molecular activation and 4f levels as electron transport bridge in erbium single atom composite photocatalysts therefore enhancing visible-light photoactivities

2021 ◽  
Author(s):  
Qiuyu Chen ◽  
Guoyang Gao ◽  
Yanzhou Zhang ◽  
Yini Li ◽  
Hongyang Zhu ◽  
...  
Keyword(s):  
Charge Separation ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Co2 Activation ◽  
Composite Photocatalysts ◽  
Co2 Reduction Reaction ◽  
Interfacial Charge ◽  
Dual Functions ◽  
Molecular Activation

Only when the interfacial charge separation is enhanced and the CO2 activation is improved, can the heterojunction nanocomposite photocatalyst be brought into full play for CO2 reduction reaction (CO2RR). Here,...

scholarly journals Electrochemical Behavior of Cellulose Nanofibrils Functionalized with Dicyanovinyl Groups

2021 ◽  
Author(s):  
Robson V. Pereira ◽  
Thais E. Gallina ◽  
Marcelo A. Pereira-da-Silva ◽  
Kênia S. Freitas ◽  
Aparecido J. de Menezes
Keyword(s):  
Chemical Modification ◽  
Cellulose Nanofibrils ◽  
Co2 Reduction ◽  
High Strength ◽  
Reduction Reaction ◽  
Hydroxyl Groups ◽  
Onset Potential ◽  
Nucleophilic Vinylic Substitution ◽  
Carbon Dioxide Co2 ◽  
Co2 Reduction Reaction

Cellulose is considered one of the most important renewable sources of biopolymers on Earth. It has attracted widespread attention due to its physical–chemical characteristics, such as biocompatibility, low toxicity, biodegradability, low density, high strength, stability in organic solvents, in addition to having hydroxyl groups, which enable its chemical modification. In this study, cellulose nanofibrils (CNFs) were functionalized with dicyanovinyl groups through nucleophilic vinylic substitution (SNV) and used as electrocatalyst in electrochemical of carbon dioxide (CO2) reduction. Results indicate that introducing dicyanovinyl groups into the structure of nanocellulose increases electrocatalytic activity as compared to that of pure nanocellulose, shifting the onset potential of the electrochemical CO2 reduction reaction to more positive values as compared to those for the reaction with argon. The atomic force microscopy (AFM) images show no changes in the morphology of CNFs after chemical modification.

Self-supported mesoscopic tin oxide nanofilms for electrocatalytic reduction of carbon dioxide to formate

2021 ◽  
Author(s):  
Juwon Jeong ◽  
Jin Soo Kang ◽  
Heejong Shin ◽  
Soo Hong Lee ◽  
Junghwan Jang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Area ◽  
Tin Oxide ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Electrochemical Process ◽  
Sno2 Film ◽  
Large Surface Area ◽  
Electrocatalytic Reduction ◽  
Co2 Reduction Reaction

Here we report self-supported SnO2 nanofilm prepared by a robust electrochemical process as an electrocatalyst for CO2 reduction reaction. SnO2 film had large surface area originating from its nano-architecture and...

Electrochemical reduction of carbon dioxide with nearly 100% carbon monoxide faradaic efficiency from vacancy-stabilized single-atom active sites

2021 ◽  
Author(s):  
Chenbao Lu ◽  
Kaiyue Jiang ◽  
Diana Tranca ◽  
Ning Wang ◽  
Hui Zhu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Energy Conversion ◽  
Electrochemical Reduction ◽  
Active Sites ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Faradaic Efficiency ◽  
Co2 Reduction Reaction

Single-atom catalysts (SACs) have been rapidly rising as emerging materials in the field of energy conversion, especially for CO2 reduction reaction. However, the selectivity and running current are still beyond...

Graphdiyne-supported single-cluster electrocatalysts for highly efficient carbon dioxide reduction reaction

Nanoscale ◽  
2021 ◽  
Author(s):  
Pingji Ge ◽  
Xingwu Zhai ◽  
Xiaoyue Liu ◽  
Yinglun Liu ◽  
Xiaodong Yang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Co2 Emissions ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Promising Technology ◽  
Highly Efficient ◽  
Electrochemical Co2 Reduction ◽  
Co2 Reduction Reaction ◽  
Single Cluster

Electrochemical CO2 reduction reaction (CO2RR) has become a promising technology to resolve the globally accelerating CO2 emissions and produce chemical fuels. In this work, the electrocatalytic performance of the transition...

Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

2019 ◽  
Author(s):  
Sahithi Ananthaneni ◽  
Rees Rankin
Keyword(s):  
Tungsten Carbide ◽  
Electrochemical Reduction ◽  
Low Cost ◽  
Co2 Reduction ◽  
Platinum Group Metal ◽  
Reduction Reaction ◽  
Metal Carbides ◽  
Depth Study ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

<div>Electrochemical reduction of CO2 to useful chemical and fuels in an energy efficient way is currently an expensive and inefficient process. Recently, low-cost transition metal-carbides (TMCs) are proven to exhibit similar electronic structure similarities to Platinum-Group-Metal (PGM) catalysts and hence can be good substitutes for some important reduction reactions. In this work, we test graphenesupported WC (Tungsten Carbide) nanocluster as an electrocatalyst for the CO2 reduction reaction. Specifically, we perform DFT studies to understand various possible reaction mechanisms and determine the lowest thermodynamic energy landscape of CO2 reduction to various products such as CO, HCOOH, CH3OH, and CH4. This in-depth study of reaction energetics could lead to improvements and develop more efficient electrocatalysts for CO2 reduction.<br></div>

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