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Electrodeposited Sn–Cu@Sn dendrites for selective electrochemical CO2 reduction to formic acid

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/d2nr01563c· OSTI ID:1887570
 [1];  [2];  [3];  [3];  [3];  [3];  [3]
  1. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of); SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  3. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
+ Show Author Affiliations
Large-scale CO2 electrolysis can be applied to store renewable energy in chemicals. Recent developments in gas diffusion electrodes now enable a commercially relevant current density. However, the low selectivity of the CO2 reduction reaction (CO2RR) still hinders practical applications. The selectivity of the CO2RR highly depends on the electrocatalyst. Sn catalysts are considered promising cathode materials for the production of formic acid. The selectivity of Sn catalysts can be regulated by controlling their morphology or alloying them with secondary metals. In this work, we enhanced the selectivity of CO2 reduction to formic acid by synthesizing Sn–Cu@Sn dendrites that have a core@shell architecture. The Sn–Cu@Sn dendrites were prepared by a scalable electro-deposition method. The electronic structure was modified to suppress a reaction pathway for CO production on the Sn surface. Notably, the Sn shell inhibited the cathodic corrosion of Cu during the CO2RR. On a gas diffusion electrode, the Sn–Cu@Sn dendrites exhibited 84.2% faraday efficiency to formic acid for 120 h with high stability.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
National Research Foundation of Korea (NRF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1887570
Journal Information:
Nanoscale, Journal Name: Nanoscale Journal Issue: 26 Vol. 14; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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