Single atom catalyst for CO2 Reduction - PowerPoint PPT Presentation
Title:
Single atom catalyst for CO2 Reduction
Description:
Converting CO2 emissions, powered by renewable electricity, to produce fuels and chemicals provides an elegant route towards a carbon-neutral energy cycle. Progress in the understanding and synthesis of Cu catalysts has spurred the explosive development of electrochemical CO2 reduction (CO2RR) technology to produce hydrocarbons and oxygenates; however, Cu, as the predominant catalyst, often exhibits limited selectivity and activity towards a specific product, leading to low productivity and substantial post-reaction purification. Here, we present a single-atom Pb-alloyed Cu catalyst (Pb1Cu) that can exclusively (~96% Faradaic efficiency) convert CO2 into formate with high activity in excess of 1 A cm–2. – PowerPoint PPT presentation
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Title: Single atom catalyst for CO2 Reduction
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Electrochemical CO2 reduction on Single atom
alloy catalyst
Literature Presentation Debabrata Bagchi Ph. D.
Student 09/07/2022
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Single atom catalysis
Chem. Rev. 2020, 120, 11703-11809
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Techniques for characterization SAC
Chem. Rev. 2020, 120, 11703-11809
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SAC in Electrocatalysis
Chem. Rev. 2020, 120, 12217-12314
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Epoxide gelation approach for Synthesis
2ml isopropanol
60C under vacuum 1 day
Sonication
CuCl22H2O
CuPb precursor
515mg
2ml propylene oxide 0.2ml H2O
Gel
In-situ -500mAcm-2 for 30min
Pb(NO3)2
115mg
Pb1Cu-SAA
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Characterization CuPb precursor
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Characterization Pb1Cu-SAA
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Microscopic analysis
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EXAFS analysis
Unfortunately, we failed to detect Pb signals in
situ, probably due to the strong background
interference caused by the fluorescence of Cu
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ECO2RR activity
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Post ECO2RR study
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ECO2RR study in H-cell
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Formate to Pure Formic acid
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CO2 reduction cell with solid electrolyte
styrene-divinylbenzene sulfonated co-polymer
Solid-state electrolyte (SSE) to produce
electrolyte-free liquid products
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HCOOH formation
proton-conducting solid electrolyte
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Control study Catalyst design
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Control study
Pb
Cu
Pb_at_Cu
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In situ IR and Raman
Pb_at_Cu
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Electrodeposition
thin Cu layer
thick Cu layer
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Other isolated modifier Bi on Cu
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Bi1Cu-SAA
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In1Cu-SAA
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Bi1Cu-SAA vs. In1Cu-SAA
universal effect of single atom alloying strategy
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DFT Study Model
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Solvation effect Model
HCOO
COOH
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DFT Study
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