TY - JOUR
T1 - Copper Aluminum Layered Double Hydroxides with Different Compositions and Morphologies as Electrocatalysts for the Carbon Dioxide Reduction Reaction
AU - Iwase, Kazuyuki
AU - Hirano, Tomo
AU - Honma, Itaru
N1 - Funding Information:
This work was supported by JSPS KAKENHI programs (Grant Nos. 19K23644 and 20K15374). This work was also supported by Material Solutions Center (MaSC), Tohoku University and Central Analytical Facility, IMRAM, Tohoku University, Japan. Synchrotron radiation experiments were performed using the BL01B1 beamline of SPring-8 (Proposal No. 2021A1294). We also acknowledge Dr. Y. Hayasaka in Tohoku for the HRTEM observation.
Funding Information:
This work was supported by JSPS KAKENHI programs (Grant Nos. 19K23644 and 20K15374). This work was also supported by Material Solutions Center (MaSC), Tohoku University and Central Analytical Facility, IMRAM, Tohoku University, Japan. Synchrotron radiation experiments were performed using the BL01B1 beamline of SPring‐8 (Proposal No. 2021A1294). We also acknowledge Dr. Y. Hayasaka in Tohoku for the HRTEM observation.
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2022/1/21
Y1 - 2022/1/21
N2 - Electrochemical CO2 reduction (CO2RR) is a key technology to convert greenhouse gas CO2 to value-added products, such as CO and formic acid (HCOOH). In the present study, two-dimensional Cu- and Al-based layered double hydroxides (Cu−Al/LDHs) were applied as CO2RR catalysts. The catalysts were synthesized using a simple co-precipitation method employing sodium carbonate solutions with different pH and synthesis temperatures. The elemental ratio of Cu and Al, and sheet size were controlled. The most active Cu−Al/LDH showed a faradaic efficiency for CO generation of 42 % and one for formate generation of 22 % at the current density of 50 mA using a gas diffusion electrode system under galvanostatic conditions. Our result indicates that the sheet size of the LDH sheet is a critical parameter for determining CO2RR activity.
AB - Electrochemical CO2 reduction (CO2RR) is a key technology to convert greenhouse gas CO2 to value-added products, such as CO and formic acid (HCOOH). In the present study, two-dimensional Cu- and Al-based layered double hydroxides (Cu−Al/LDHs) were applied as CO2RR catalysts. The catalysts were synthesized using a simple co-precipitation method employing sodium carbonate solutions with different pH and synthesis temperatures. The elemental ratio of Cu and Al, and sheet size were controlled. The most active Cu−Al/LDH showed a faradaic efficiency for CO generation of 42 % and one for formate generation of 22 % at the current density of 50 mA using a gas diffusion electrode system under galvanostatic conditions. Our result indicates that the sheet size of the LDH sheet is a critical parameter for determining CO2RR activity.
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U2 - 10.1002/cssc.202102340
DO - 10.1002/cssc.202102340
M3 - Article
C2 - 34826212
AN - SCOPUS:85120875040
VL - 15
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
IS - 2
M1 - e202102340
ER -