Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

Low Cost ◽

Co2 Reduction ◽

Platinum Group Metal ◽

Reduction Reaction ◽

Metal Carbides ◽

Depth Study ◽

Reduction Of Co2 ◽

<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>

Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

Catalysts ◽

10.3390/catal9070604 ◽

2019 ◽

Vol 9 (7) ◽

pp. 604

Author(s):

Sahithi Ananthaneni ◽

Zachery Smith ◽

Rees B. Rankin

Keyword(s):

Tungsten Carbide ◽

Density Functional ◽

Low Cost ◽

Co2 Reduction ◽

Platinum Group Metal ◽

Reduction Reaction ◽

Depth Study ◽

Reduction Of Co2 ◽

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) have been 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 graphene-supported WC (Tungsten Carbide) nanoclusters as an electrocatalyst for the CO2 reduction reaction. Specifically, we perform density functional theory (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 development of more efficient electrocatalysts for CO2 reduction.

Electropolymerized Metal-Protoporphyrin electrodes for Selective Electrochemical Reduction of CO2

Catalysis Science & Technology ◽

10.1039/d0cy02150d ◽

2021 ◽

Author(s):

Nael Yasri ◽

Tareq Al-Attas ◽

Jinguang Hu ◽

Md Golam Kibria

Keyword(s):

Aqueous Media ◽

Co2 Reduction ◽

Reduction Reaction ◽

Practical Implementation ◽

Electrochemical Co2 Reduction ◽

Reduction Of Co2 ◽

Developing catalysts that exhibit high efficiencies for the electrochemical CO2 reduction reaction (CO2RR) in aqueous media is vital in both aspects of the healthier environment and for the practical implementation...

Three-dimensional porous copper-decorated bismuth-based nanofoam for boosting electrochemical reduction of CO2 to formate

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00065a ◽

2021 ◽

Author(s):

Yingchun Zhang ◽

Changsheng Cao ◽

Xintao Wu ◽

Qi-Long Zhu

Keyword(s):

Current Density ◽

High Current Density ◽

Three Dimensional ◽

Co2 Reduction ◽

Reduction Reaction ◽

High Current ◽

Porous Copper ◽

Reduction Of Co2 ◽

Co2 Reduction Reaction ◽

Wide Potential

Bismuth (Bi)-based nanomaterials are considered as the promising electrocatalysts for electrocatalytic CO2 reduction reaction (CO2RR), but it is challenging to achieve high current density and selectivity in a wide potential...

Optimizing the use of a “Zero-Gap” Gas Diffusion Electrode Setup for Electrochemical Reduction of CO2

10.26434/chemrxiv-2021-8k376 ◽

2021 ◽

Author(s):

Shima Alinejad ◽

Jonathan Quinson ◽

Yao Li ◽

Ying Kong ◽

Sven Reichenberger ◽

...

Keyword(s):

Co2 Reduction ◽

Catalyst Layer ◽

Gas Diffusion ◽

Reduction Reaction ◽

Gas Diffusion Electrode ◽

Test Bed ◽

Catalyst Screening ◽

Electrochemical Co2 Reduction ◽

Reduction Of Co2 ◽

The lack of a robust and standardized experimental test bed to investigate the performance of catalyst materials for the electrochemical CO2 reduction reaction (ECO2RR) is one of the major challenges in this field of research. To best reproduce and mimic commercially relevant conditions for catalyst screening and testing, gas diffusion electrode (GDE) setups attract a rising attention as an alternative to conventional aqueous-based setups such as the H-cell configuration. In particular a zero-gap design shows promising features for upscaling to the commercial scale. In this study, we develop further our recently introduced zero-gap GDE setup for the CO2RR using an Au electrocatalyst as model system and identify/report the key experimental parameters to control in the catalyst layer preparation in order to optimize the activity and selectivity of the catalyst.

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

Applied Sciences ◽

10.3390/app10103487 ◽

2020 ◽

Vol 10 (10) ◽

pp. 3487 ◽

Cited By ~ 1

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.

Copper-Tin Alloys for the Electrocatalytic Reduction of CO2 in an Imidazolium-Based Non-Aqueous Electrolyte

Energies ◽

10.3390/en12163132 ◽

2019 ◽

Vol 12 (16) ◽

pp. 3132 ◽

Cited By ~ 3

Author(s):

Robert Sacci ◽

Stephanie Velardo ◽

Lu Xiong ◽

Daniel Lutterman ◽

Joel Rosenthal

Keyword(s):

Co2 Reduction ◽

Value Added ◽

Catalyst System ◽

Reduction Reaction ◽

Technological Advancement ◽

Imidazolium Cation ◽

Tin Alloys ◽

Standard Calomel Electrode ◽

Reduction Of Co2 ◽

The ability to synthesize value-added chemicals directly from CO2 will be an important technological advancement for future generations. Using solar energy to drive thermodynamically uphill electrochemical reactions allows for near carbon-neutral processes that can convert CO2 into energy-rich carbon-based fuels. Here, we report on the use of inexpensive CuSn alloys to convert CO2 into CO in an acetonitrile/imidazolium-based electrolyte. Synergistic interactions between the CuSn catalyst and the imidazolium cation enables the electrocatalytic conversion of CO2 into CO at −1.65 V versus the standard calomel electrode (SCE). This catalyst system is characterized by overpotentials for CO2 reduction that are similar to more expensive Au- and Ag-based catalysts, and also shows that the efficacy of the CO2 reduction reaction can be tuned by varying the CuSn ratio.

Theoretical understanding of the electrochemical reaction barrier: a kinetic study of CO2 reduction reaction on copper electrodes

Physical Chemistry Chemical Physics ◽

10.1039/c9cp06824d ◽

2020 ◽

Vol 22 (17) ◽

pp. 9607-9615 ◽

Cited By ~ 4

Author(s):

Shu-Ting Gao ◽

Shi-Qin Xiang ◽

Jun-Lin Shi ◽

Wei Zhang ◽

Liu-Bin Zhao

Keyword(s):

Renewable Energy ◽

Kinetic Study ◽

Electrochemical Reaction ◽

Co2 Reduction ◽

Reduction Reaction ◽

Theoretical Understanding ◽

Copper Electrodes ◽

Chemical Products ◽

The electrochemical reduction of CO2 is a promising route for converting intermittent renewable energy into storable fuels and useful chemical products.

An enhanced electrochemical CO2 reduction reaction on the SnOx–PdO surface of SnPd nanoparticles decorated on N-doped carbon fibers

Catalysis Science & Technology ◽

10.1039/d0cy01437k ◽

2021 ◽

Author(s):

Sreekanth Narayanaru ◽

Gopinathan M. Anilkumar ◽

Masaki Ito ◽

Takanori Tamaki ◽

Takeo Yamaguchi

Keyword(s):

Carbon Fibers ◽

Co2 Reduction ◽

Reduction Reaction ◽

Electrochemical Co2 Reduction ◽

Electrochemical reduction of CO2 to formate on SnPd–NCF. The adsorbed bicarbonate ion promotes the protonation of CO2˙− to HCO2−.

Design of pre-catalysts for heterogeneous CO2 electrochemical reduction

Journal of Materials Chemistry A ◽

10.1039/d1ta03624f ◽

2021 ◽

Author(s):

Jingfu He ◽

Chenghui Wu ◽

Yanming Li ◽

Changli Li

Keyword(s):

Climate Change ◽

Energy Supply ◽

Co2 Reduction ◽

Reduction Reaction ◽

Metal Catalysts ◽

Global Challenge ◽

Gold Silver ◽

Copper Gold ◽

CO2 reduction reaction (CO2RR) is one of the most promising methods to alleviate the global challenge of climate change and energy supply. Metal catalysts such as copper, gold, silver, tin,...