Theoretical search for novel Au or Ag bimetallic alloys capable of transforming CO2 into hydrocarbons

2019 ◽  
Vol 7 (36) ◽  
pp. 20567-20573
Author(s):  
Nian Wu ◽  
Li Xiao ◽  
Lin Zhuang
Keyword(s):  
Electrochemical Reduction ◽  
High Selectivity ◽  
Reduction Reaction ◽  
Bimetallic Alloys ◽  
Low Overpotential

Designing efficient catalysts with a high selectivity toward hydrocarbons at a relatively low overpotential is of great significance for the application of the CO2 electrochemical reduction reaction (CO2RR).

Electrochemical reduction of CO2to synthesis gas with controlled CO/H2ratios

2017 ◽  
Vol 10 (5) ◽  
pp. 1180-1185 ◽  
Author(s):  
Wenchao Sheng ◽  
Shyam Kattel ◽  
Siyu Yao ◽  
Binhang Yan ◽  
Zhixiu Liang ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Synthesis Gas ◽  
High Selectivity ◽  
Reduction Reaction

In situtransformation of Pd into β-PdH is the origin of the high selectivity for CO in the electrochemical CO2reduction reaction using Pd as the electrocatalyst.

Elastic Ag-anchored N-doped graphene/carbon foam for the selective electrochemical reduction of carbon dioxide to ethanol

2018 ◽  
Vol 6 (12) ◽  
pp. 5025-5031 ◽  
Author(s):  
Kuilin Lv ◽  
Yanchen Fan ◽  
Ying Zhu ◽  
Yi Yuan ◽  
Jinrong Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
High Selectivity ◽  
Carbon Foam ◽  
Faradaic Efficiency ◽  
Doped Graphene ◽  
Low Overpotential

3D macroporous hierarchical Ag-G-NCF can efficiently convert CO2 to ethanol with a low overpotential, high faradaic efficiency and high selectivity.

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>

scholarly journals Highly active and selective oxygen reduction to H2O2 on boron-doped carbon for high production rates

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yang Xia ◽  
Xunhua Zhao ◽  
Chuan Xia ◽  
Zhen-Yu Wu ◽  
Peng Zhu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Density Functional ◽  
High Selectivity ◽  
Density Functional Theory Calculations ◽  
Reduction Reaction ◽  
Production Rates ◽  
Practical Applications ◽  
Highly Active ◽  
Boron Doped ◽  
Oxidized Carbon

AbstractOxygen reduction reaction towards hydrogen peroxide (H2O2) provides a green alternative route for H2O2 production, but it lacks efficient catalysts to achieve high selectivity and activity simultaneously under industrial-relevant production rates. Here we report a boron-doped carbon (B-C) catalyst which can overcome this activity-selectivity dilemma. Compared to the state-of-the-art oxidized carbon catalyst, B-C catalyst presents enhanced activity (saving more than 210 mV overpotential) under industrial-relevant currents (up to 300 mA cm−2) while maintaining high H2O2 selectivity (85–90%). Density-functional theory calculations reveal that the boron dopant site is responsible for high H2O2 activity and selectivity due to low thermodynamic and kinetic barriers. Employed in our porous solid electrolyte reactor, the B-C catalyst demonstrates a direct and continuous generation of pure H2O2 solutions with high selectivity (up to 95%) and high H2O2 partial currents (up to ~400 mA cm−2), illustrating the catalyst’s great potential for practical applications in the future.

Tuning selectivity of electrochemical reduction reaction of CO2 by atomically dispersed Pt into SnO2 nanoparticles

2021 ◽  
pp. 133035
Author(s):  
Xiaoxia Zhou ◽  
Erhong Song ◽  
Zhaoyu Kuang ◽  
Zhe Gao ◽  
Han Zhao ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Sno2 Nanoparticles ◽  
Reduction Reaction

Importance of Au nanostructures in CO2 electrochemical reduction reaction

2020 ◽  
Vol 65 (10) ◽  
pp. 796-802 ◽  
Author(s):  
Dong-Rui Yang ◽  
Ling Liu ◽  
Qian Zhang ◽  
Yi Shi ◽  
Yue Zhou ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Reduction Reaction

scholarly journals Supramolecular Tuning Enables Selective Oxygen Reduction Catalyzed by Cobalt Porphyrins for Direct Electrosynthesis of Hydrogen Peroxide

2019 ◽  
Author(s):  
Peter T. Smith ◽  
Younghoon Kim ◽  
Bahiru Punja Benke ◽  
Kimoon Kim ◽  
Christopher Chang
Keyword(s):  
Oxygen Reduction ◽  
High Selectivity ◽  
Selective Reduction ◽  
Design Strategy ◽  
Reduction Reaction ◽  
Site Isolation ◽  
Control Reaction ◽  
Electrosynthesis Of Hydrogen Peroxide ◽  
Cobalt Porphyrins ◽  
Catalytic Applications

<div> <div> <div> <p>We report a supramolecular design strategy for promoting the selective reduction of O2 for direct electrosynthesis of H2O2. Specifically, we utilized cobalt tetraphenylporphyrin (Co-TPP), a non-selective oxygen reduction reaction (ORR) catalyst, as a building block to assemble the permanently porous supramolecular cage Co-PB-1(6) bearing six Co-TPP subunits connected through twenty-four imine bonds. Reduction of these imine linkers to amines yields the more flexible porous cage Co-rPB-1(6). Both Co-PB-1(6) and Co-rPB-1(6) cages produce 90-100% H2O2 from electrochemical ORR catalysis in neutral pH water, and we attribute this high selectivity to site isolation of the discrete molecular units, as the analogous Co-TPP monomer generates only a 50% mixture of H2O2 and H2O from electrochemical ORR under the same conditions. The ability to control reaction selectivity in supramolecular structures beyond traditional host-guest interactions offers new opportunities for designing such architectures for a broader range of catalytic applications. </p> </div> </div> </div>

Nanoporous Cu/Ni oxide composites: efficient catalysts for electrochemical reduction of CO2in aqueous electrolytes

2018 ◽  
Vol 20 (16) ◽  
pp. 3705-3710 ◽  
Author(s):  
Dexin Yang ◽  
Qinggong Zhu ◽  
Xiaofu Sun ◽  
Chunjun Chen ◽  
Lu Lu ◽  
...  
Keyword(s):  
Formic Acid ◽  
Electrochemical Reduction ◽  
Aqueous Electrolyte ◽  
Aqueous Electrolytes ◽  
Reduction Activity ◽  
Low Overpotential ◽  
Oxide Composites ◽  
Ni Oxide

Nanoporous Cu/Ni oxide composites can improve CO2reduction activity for producing formic acid in an aqueous electrolyte with a low overpotential.

A Spectroscopic Study on the Nitrogen Electrochemical Reduction Reaction on Gold and Platinum Surfaces

2018 ◽  
Vol 140 (4) ◽  
pp. 1496-1501 ◽  
Author(s):  
Yao Yao ◽  
Shangqian Zhu ◽  
Haijiang Wang ◽  
Hui Li ◽  
Minhua Shao
Keyword(s):  
Spectroscopic Study ◽  
Electrochemical Reduction ◽  
Reduction Reaction ◽  
Platinum Surfaces

Ultra-small Pd nanoparticles derived from a supramolecular assembly for enhanced electrochemical reduction of CO2 to CO

2019 ◽  
Vol 55 (66) ◽  
pp. 9805-9808 ◽  
Author(s):  
Ruru Chen ◽  
Minna Cao ◽  
Weiguang Yang ◽  
Huimin Wang ◽  
Suyuan Zhang ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Palladium Nanoparticles ◽  
High Selectivity ◽  
Supramolecular Assembly ◽  
Pd Nanoparticles ◽  
Reduction Of Co2

Well-dispersed palladium nanoparticles based on a supramolecular assembly exhibit high selectivity, activity and stability for the conversion of CO2 to CO.

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