Surface-Alkalinized Ti3C2 MXene as an Efficient Cocatalyst for Enhanced Photocatalytic CO2 Reduction over ZnO

2021 ◽  
Author(s):  
Junyue Li ◽  
Ziyi Wang ◽  
Huayu Chen ◽  
Qiqi Zhang ◽  
Huilin Hu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Co2 Reduction ◽  
Charge Carriers ◽  
Hydrocarbon Fuels ◽  
Photocatalytic Reduction ◽  
Research Attention ◽  
Carbon Dioxide Co2 ◽  
Photoinduced Charge

Photocatalytic reduction of carbon dioxide (CO2) into hydrocarbon fuels has attracted increasing research attention in recent years. However, the fast recombination of photoinduced charge carriers and poor adsorption/activation capability of...

Direct Z-scheme Sn-In2O3/In2S3 heterojunction nanostructures for enhanced photocatalytic CO2 reduction activity

2021 ◽  
Author(s):  
Yinyi Ma ◽  
Zemin Zhang ◽  
Xiao Jiang ◽  
Rongke Sun ◽  
Mingzheng Xie ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Environmental Pollution ◽  
Light Absorption ◽  
Co2 Reduction ◽  
Photocatalytic Reduction ◽  
Practical Significance ◽  
Energy Crisis ◽  
Low Light ◽  
Reduction Activity

Photocatalytic reduction of carbon dioxide into chemical fuels has great practical significance in solving energy crisis and environmental pollution, but remains a big challenge owing to its low light absorption...

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,...

Low Full‐Cell Voltage Driven High‐Current‐Density Selective Paired Formate Electrosynthesis

2021 ◽  
Author(s):  
Chuqian Xiao ◽  
Ling Cheng ◽  
Yating Wang ◽  
Jinze Liu ◽  
Rongzhen Chen ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Current Density ◽  
Co2 Reduction ◽  
Value Added ◽  
Cell Voltage ◽  
High Current ◽  
Oxidation Of Methanol ◽  
Promising Strategy ◽  
Electro Oxidation ◽  
Carbon Dioxide Co2

Anodic selective electro‐oxidation of methanol paring with cathodic carbon dioxide (CO2) reduction is regarded as a promising strategy to generate value added formate product. We firstly design a 3D‐assembled NiCo...

scholarly journals Extreme droughts drive tropical semi-arid eutrophic reservoirs towards CO2 sub-saturation

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Jurandir Rodrigues de Mendonça Júnior ◽  
André Megali Amado ◽  
Luciana de Oliveira Vidal ◽  
Arthur Mattos ◽  
Vanessa Becker
Keyword(s):  
Carbon Dioxide ◽  
Water Level ◽  
Chlorophyll A ◽  
Co2 Reduction ◽  
Water Volume ◽  
Drought Period ◽  
Autotrophic Metabolism ◽  
Semi Arid Region ◽  
Carbon Dioxide Co2 ◽  
Semi Arid

Abstract Aim: This study aimed to evaluate the carbon dioxide (CO2) dynamics in tropical semi-arid reservoirs during a prolonged drought period as well as to test if the trophic state affects the CO2 saturation. Methods This study was performed in four reservoirs located in the tropical semi-arid region in the northeast of Brazil. All samplings were performed between 9 and 12 am using a Van Dorn Bottle. Samples for partial pressure of carbon dioxide (pCO2 ) measurements were taken in the sub-surface as well as samples for total phosphorus and chlorophyll-a. Correlation analysis and linear regression were used to detect relations among the calculated pCO2, water volume and chlorophyll-a. Results The water level reduction due to atypical droughts caused chlorophyll-a concentrations to increase, which in turn, led to CO2 reduction in the water. However, CO2 concentrations were very variable and an alternation between CO2 sub-saturation and super-saturation conditions was observed. This paper showed that water volume and chlorophyll-a were important regulators of CO2 in the water, as well as important carbon balance predictors in the tropical semiarid reservoirs. Conclusions The results of this paper indicate that the eutrophication allied to drastic water level reductions lead to a tendency of autotrophic metabolism of these systems.

scholarly journals Enhanced Photocatalytic CO2 Reduction over TiO2 Using Metalloporphyrin as the Cocatalyst

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 654
Author(s):  
Ziyi Wang ◽  
Wei Zhou ◽  
Xin Wang ◽  
Xueliang Zhang ◽  
Huayu Chen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Efficiency ◽  
Separation Efficiency ◽  
Co2 Reduction ◽  
Photogenerated Electron ◽  
Green Technology ◽  
Co2 Photoreduction ◽  
Metal Centers ◽  
Carbon Dioxide Co2 ◽  
Photoinduced Charge

The photocatalytic reduction of carbon dioxide (CO2) into CO and hydrocarbon fuels has been considered as an ideal green technology for solar-to-chemical energy conversion. The separation/transport of photoinduced charge carriers and adsorption/activation of CO2 molecules play crucial roles in photocatalytic activity. Herein, tetrakis (4-carboxyphenyl) porphyrin (H2TCPP) was incorporated with different metal atoms in the center of a conjugate macrocycle, forming the metalloporphyrins TCPP-M (M = Co, Ni, Cu). The as-obtained metalloporphyrin was loaded as a cocatalyst on commercial titania (P25) to form TCPP-M@P25 (M = Co, Ni, Cu) for enhanced CO2 photoreduction. Among all of the TCPP-M@P25 (M = Co, Ni, Cu), TCPP-Cu@P25 exhibited the highest evolution rates of CO (13.6 μmol⋅g−1⋅h−1) and CH4 (1.0 μmol⋅g−1⋅h−1), which were 35.8 times and 97.0 times those of bare P25, respectively. The enhanced photocatalytic activity could be attributed to the improved photogenerated electron-hole separation efficiency, as well as the increased adsorption/activation sites provided by the metal centers in TCPP-M (M = Co, Ni, Cu). Our study indicates that metalloporphyrin could be used as a high-efficiency cocatalyst to enhance CO2 photoreduction activity.

TiO2 nanosheet-anchoring Au nanoplates: high-energy facet and wide spectra surface plasmon-promoting photocatalytic efficiency and selectivity for CO2 reduction

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 81510-81516 ◽  
Author(s):  
Meng Wang ◽  
Qiutong Han ◽  
Yong Zhou ◽  
Ping Li ◽  
Wenguang Tu ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Co2 Reduction ◽  
High Energy ◽  
Hydrocarbon Fuels ◽  
Photocatalytic Reduction ◽  
Photocatalytic Efficiency

An Au–TiO2 nanocomposite consisting of (001) exposed TiO2 nanosheet-anchored Au nanoplates was successfully fabricated and applied for the photocatalytic reduction of CO2 into hydrocarbon fuels.

C3 Production from CO2 Reduction by Concerted *CO Trimerization on Single Atom Catalyst

2022 ◽  
Author(s):  
Ling Chen ◽  
Cheng Tang ◽  
Yao Zheng ◽  
Egill Skúlason ◽  
Yan Jiao
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Co2 Reduction ◽  
Single Atom ◽  
Carbon Dioxide Co2

The direct electroreduction of carbon dioxide (CO2) and carbon monoxide (CO) to C3 products is challenging. The main reason is the competitive C2 production resulting from a traditional sequential C–C...

Electrochemical CO2 Reduction to Ethanol: From Mechanistic Understanding to Catalyst Design

2021 ◽  
Author(s):  
Tu Ngoc Nguyen ◽  
Jiaxun Guo ◽  
Ashwini Sachindran ◽  
Fengwang Li ◽  
Ali Seifitokaldani ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Greenhouse Gas ◽  
Electrochemical Reduction ◽  
Co2 Reduction ◽  
Catalyst Design ◽  
Greenhouse Gas Mitigation ◽  
Electrochemical Co2 Reduction ◽  
Mechanistic Understanding ◽  
Carbon Dioxide Co2

The electrochemical reduction of carbon dioxide (CO2) to chemicals is gaining great attention as a pragmatic solution for greenhouse gas mitigation and for the utilization of CO2 to produce useful...

scholarly journals Stabilization Effects in Binary Colloidal Cu and Ag Nanoparticle Electrodes under Electrochemical CO2 Reduction Conditions

Nanoscale ◽  
2021 ◽  
Author(s):  
Longfei Wu ◽  
Kees Kolmeijer ◽  
Yue Zhang ◽  
Hongyu An ◽  
Sven Arnouts ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reaction ◽  
Co2 Reduction ◽  
Modified Electrodes ◽  
Ag Nanoparticle ◽  
Reaction Conditions ◽  
Electrochemical Co2 Reduction ◽  
Carbon Dioxide Co2 ◽  
Reduction Catalysts ◽  
Sintering Processes

Nanoparticle modified electrodes constitute an attractive way to tailor-make efficient carbon dioxide (CO2) reduction catalysts. However, the restructuring and sintering processes of nanoparticles under electrochemical reaction conditions not only impedes...

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