Probing the enhanced catalytic activity of carbon nanotube supported Ni-LaOx hybrids for the CO2 reduction reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 14207-14219 ◽  
Author(s):  
Jie Gao ◽  
Qian Jiang ◽  
Yuefeng Liu ◽  
Wei Liu ◽  
Wei Chu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Active Sites ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Methane Selectivity ◽  
Co2 Reduction Reaction ◽  
Supported Ni

The promoted active sites for the CO2 reduction reaction on Ni-LaOx/oCNT consist of LaOx species on the surface of Ni NPs and are responsible for the highest TOF rate (51.8 × 10−3 s−1) of CO2 conversion with 100% methane selectivity at 240 °C.

scholarly journals Photoelectrochemical Reduction of CO2 to Syngas by Reduced Ag Catalysts on Si Photocathodes

2020 ◽  
Vol 10 (10) ◽  
pp. 3487 ◽  
Author(s):  
Changyeon Kim ◽  
Seokhoon Choi ◽  
Min-Ju Choi ◽  
Sol A Lee ◽  
Sang Hyun Ahn ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Onset Potential ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction ◽  
Ag Catalysts

The photoelectrochemical reduction of CO2 to syngas that is used for many practical applications has been emerging as a promising technique to relieve the increase of CO2 in the atmosphere. Si has been considered to be one of the most promising materials for photoelectrodes, but the integration of electrocatalysts is essential for the photoelectrochemical reduction of CO2 using Si. We report an enhancement of catalytic activity for CO2 reduction reaction by Ag catalysts of tuned morphology, active sites, and electronic structure through reducing anodic treatment. Our proposed photocathode structure, a SiO2 patterned p-Si photocathode with these reduced Ag catalysts, that was fabricated using electron-beam deposition and electrodeposition methods, provides a low onset-potential of −0.16 V vs. the reversible hydrogen electrode (RHE), a large saturated photocurrent density of −9 mA/cm2 at −1.23 V vs. RHE, and faradaic efficiency for CO of 47% at −0.6 V vs. RHE. This photocathode can produce syngas in the ratio from 1:1 to 1:3, which is an appropriate proportion for practical application. This work presents a new approach for designing photocathodes with a balanced catalytic activity and light absorption to improve the photoelectrochemical application for not only CO2 reduction reaction, but also water splitting or N2 reduction reaction.

Atomic regulation of metal-organic framework derived carbon-based single-atom catalysts for electrochemical CO2 reduction reaction

2021 ◽  
Author(s):  
Danni Zhou ◽  
Xinyuan Li ◽  
Huishan Shang ◽  
Fengjuan Qin ◽  
Wenxing Chen
Keyword(s):  
Active Sites ◽  
Metal Organic Framework ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Electrochemical Co2 Reduction ◽  
Metal Organic ◽  
Co2 Reduction Reaction ◽  
Organic Framework

Metal-organic framework (MOF) derived single-atom catalysts (SACs), featured unique active sites and adjustable topological structures, exhibit high electrocatalytic performance on carbon dioxide reduction reactions (CO2RR). By modulating elements and atomic...

Identifying Active Sites of Nitrogen-Doped Carbon Materials for the CO2 Reduction Reaction

2018 ◽  
Vol 28 (21) ◽  
pp. 1800499 ◽  
Author(s):  
Song Liu ◽  
Hongbin Yang ◽  
Xiang Huang ◽  
Linghui Liu ◽  
Weizheng Cai ◽  
...  
Keyword(s):  
Active Sites ◽  
Carbon Materials ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Co2 Reduction Reaction

scholarly journals Investigating the Nature of the Active Sites for the CO2 Reduction Reaction on Carbon-Based Electrocatalysts

ACS Catalysis ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 7668-7678 ◽  
Author(s):  
Tristan Asset ◽  
Samuel T. Garcia ◽  
Sergio Herrera ◽  
Nalin Andersen ◽  
Yechuan Chen ◽  
...  
Keyword(s):  
Active Sites ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Co2 Reduction Reaction ◽  
Carbon Based

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...

Active Sites on Heterogeneous Single-Iron-Atom Electrocatalysts in CO2 Reduction Reaction

2019 ◽  
Vol 4 (7) ◽  
pp. 1778-1783 ◽  
Author(s):  
Xueping Qin ◽  
Shangqian Zhu ◽  
Fei Xiao ◽  
Lulu Zhang ◽  
Minhua Shao
Keyword(s):  
Iron Atom ◽  
Active Sites ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Co2 Reduction Reaction

Well-defined Fe-Cu diatomic sites for efficient catalysis of CO2 electroreduction

2021 ◽  
Author(s):  
Manman Feng ◽  
Xuemei Wu ◽  
Huiyuan Cheng ◽  
Zihao Fan ◽  
Xiangcun Li ◽  
...  
Keyword(s):  
Active Sites ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Co2 Electroreduction ◽  
New Strategy ◽  
Co2 Reduction Reaction

The diatomic catalysts (DACs) provide a new strategy for efficient catalysis of CO2 reduction reaction (CO2RR) owing to their maximum atomic utility and more flexible active sites. However, it is...

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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