Mass Transport Control by Surface Graphene Oxide for Selective CO Production from Electrochemical CO2 Reduction

ACS Catalysis ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 3222-3231 ◽  
Author(s):  
Dang Le Tri Nguyen ◽  
Chan Woo Lee ◽  
Jonggeol Na ◽  
Min-Cheol Kim ◽  
Nguyen Dien Kha Tu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Mass Transport ◽  
Co2 Reduction ◽  
Electrochemical Co2 Reduction ◽  
Transport Control

Acceleration of Electrochemical CO2 Reduction to Formate at the Sn/Reduced Graphene Oxide Interface

ACS Catalysis ◽  
2021 ◽  
pp. 3310-3318
Author(s):  
Takuya Tsujiguchi ◽  
Yusuke Kawabe ◽  
Samuel Jeong ◽  
Tatsuhiko Ohto ◽  
Suresh Kukunuri ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Co2 Reduction ◽  
Oxide Interface ◽  
Electrochemical Co2 Reduction ◽  
Reduced Graphene

scholarly journals Enhancing Electrocatalytic CO2 Reduction Using a System-Integrated Approach to Catalyst Discovery

2018 ◽  
Author(s):  
Thomas Burdyny ◽  
Wilson A. Smith
Keyword(s):  
Mass Transport ◽  
Electrochemical Cell ◽  
Co2 Reduction ◽  
Integrated Approach ◽  
Reduction Reaction ◽  
Reaction Conditions ◽  
Alkaline Reaction ◽  
Electrochemical Co2 Reduction ◽  
Current Densities ◽  
Co2 Reduction Reaction

The presented modelling results in this article show that electrochemical CO2 reduction performed at commercially-relevant current densities will ultimately lead to locally alkaline reaction conditions regardless of the electrolyte, configuration and reasonable mass transport scenarios. Discussed in detail are the large implications that this result has for the CO2 reduction reaction itself, and the current way in which catalysts are designed and tested in different electrochemical cell architectures.

scholarly journals Boosting Electrochemical CO2 Reduction to Formate by SnO2/Graphene Oxide with Amide Linkages

2021 ◽  
Author(s):  
Xiaofei Zhang ◽  
Zhongjie Yang ◽  
Yang caoyu ◽  
Jianyu Han ◽  
Wenshi Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Formic Acid ◽  
Co2 Reduction ◽  
Efficient Utilization ◽  
Electrochemical Co2 Reduction

Selective electrochemical CO2 reduction to formic acid is an appealing strategy to achieve efficient utilization of CO2. Modification of catalytic interface with organic linkers have been proven to promote the...

scholarly journals Mitigating Mass Transport Limitations: Hierarchical Nanoporous Gold Flow-Through Electrodes for Electrochemical CO2 Reduction

2021 ◽  
Author(s):  
Zhen Qi ◽  
Steven A Hawks ◽  
Corie Horwood ◽  
Jürgen Biener ◽  
Monika M. Biener
Keyword(s):  
Mass Transport ◽  
Diffusion Rate ◽  
Co2 Reduction ◽  
Reaction Rates ◽  
Nanoporous Gold ◽  
Aqueous Electrolytes ◽  
Low Concentration ◽  
Electrochemical Co2 Reduction ◽  
Flow Through ◽  
And Diffusion

The reaction rates for electrochemical CO2 reduction in aqueous electrolytes can be limited by the low concentration and diffusion rate of the reactant CO2. To overcome this limitation, we fabricated...

scholarly journals Ni-N-Doped Carbon-Modified Reduced Graphene Oxide Catalysts for Electrochemical CO2 Reduction Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 561
Author(s):  
Fangyuan Wang ◽  
Yu Liu ◽  
Zhiling Song ◽  
Zhichao Miao ◽  
Jinping Zhao
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Current Density ◽  
Co2 Reduction ◽  
Textural Properties ◽  
Reduction Reaction ◽  
Carbon Neutrality ◽  
Electrochemical Co2 Reduction ◽  
Reduced Graphene ◽  
Co2 Reduction Reaction

Electrochemical CO2 reduction reaction (CO2RR) is eliciting considerable attention in relation to the carbon cycle and carbon neutrality. As for the practical application of CO2RR, the electrocatalyst is a crucial factor, but, even so, designing and synthesizing an excellent catalyst remains a significant challenge. In this paper, the coordination compound of Ni ions and dimethylglyoxime (DMG) was employed as a precursor to modify reduced graphene oxide (rGO) for CO2RR. The textural properties and chemical bonds of as-obtained rGO, N–C–rGO, Ni–rGO, Ni–N–C, and Ni–N–C–rGO materials were investigated in detail, and the role of Ni, N–C, and rGO in the CO2RR were researched and confirmed. Among all the catalysts, the Ni–N–C–rGO showed the optimal catalytic activity and selectivity with a high current density of 10 mA cm−2 and FE(CO)% of 85% at −0.87 V vs. RHE. In addition, there was no obvious decrease in activity for 10 h. Therefore, the Ni–N–C–rGO is a promising catalyst for CO2RR to CO.

scholarly journals Enhancing Electrocatalytic CO2 Reduction Using a System-Integrated Approach to Catalyst Discovery

2018 ◽  
Author(s):  
Thomas Burdyny ◽  
Wilson A. Smith
Keyword(s):  
Mass Transport ◽  
Electrochemical Cell ◽  
Co2 Reduction ◽  
Integrated Approach ◽  
Reduction Reaction ◽  
Reaction Conditions ◽  
Alkaline Reaction ◽  
Electrochemical Co2 Reduction ◽  
Current Densities ◽  
Co2 Reduction Reaction

The presented modelling results in this article show that electrochemical CO2 reduction performed at commercially-relevant current densities will ultimately lead to locally alkaline reaction conditions regardless of the electrolyte, configuration and reasonable mass transport scenarios. Discussed in detail are the large implications that this result has for the CO2 reduction reaction itself, and the current way in which catalysts are designed and tested in different electrochemical cell architectures.

Electrodeposition of Strained-Layer Superlattices

1996 ◽  
Vol 451 ◽  
Author(s):  
T. P. Moffat
Keyword(s):  
Charge Transfer ◽  
Mass Transport ◽  
Structural Evolution ◽  
Iron Group ◽  
Morphological Instability ◽  
Group Metal ◽  
Iron Group Metal ◽  
Transport Control ◽  
Strained Layer Superlattices ◽  
Interfacial Charge

ABSTRACTA variety of Cu/(Ni, Co) multilayers have been grown on Cu single crystals by pulse plating from an alloy electroplating bath. Copper is deposited under mass transport control while the iron group metal is deposited under interfacial charge transfer control. The structural evolution of these films is influenced by the morphological instability of the mass transport limited copper deposition reaction and the development of growth twins during iron-group metal deposition. Specular films have been obtained for growth on Cu(100) while rough, defective films were typically obtained for growth on Cu(111) and Cu(110).

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

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