In:
Catalysis Science & Technology, Royal Society of Chemistry (RSC), Vol. 13, No. 23 ( 2023), p. 6675-6684
Abstract:
CO 2 electrocatalytic reduction (CO 2 ER) is an excellent way for synthesizing value-added products and achieving carbon neutrality. While C 2+ products, such as C 2 H 4 , C 2 H 5 OH, etc. , have higher energy densities and are more valuable than C 1 products, their synthesis is more challenging. In the present work, a series of easily prepared lanthanide neodymium-doped CuO x catalysts (denoted as Cu a NdO x , a = 0.2, 0.5, 1, 2, and 5) were developed and applied in CO 2 ER to produce C 2 H 4 . In an H-type cell, the Cu 2 NdO x catalyst with a Co/Nd molar ratio of 2/1 demonstrated the best catalytic performance with a high FE C 2 H 4 of 54.4% and a current density of 28.4 mA cm −2 at −1.19 V ( vs. RHE) in 0.5 M KCl electrolyte. Characterization results showed that the introduction of neodymium could effectively stabilize the Cu( i ) species and enhance CO 2 adsorption on the catalyst. In situ Raman spectra and DFT calculation confirmed that the Nd sites favor the adsorption and activation of CO 2 , while the Cu sites are responsible for reducing CO 2 to *COOH and *CO. The formed *CO was then coupled to ethylene, further improving the Faradaic efficiency of ethylene (FE C 2 H 4 ). It is noteworthy that this is the first instance of using lanthanide neodymium as a promoter in Cu-based material catalyzed CO 2 ER. The present work not only provides efficient Cu–Nd bimetallic catalysts for CO 2 ER to ethylene but also opens up a new avenue of utilizing Nd-based lanthanide metals in catalysis.
Type of Medium:
Online Resource
ISSN:
2044-4753
,
2044-4761
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2595090-3
detail.hit.zdb_id:
2627832-7
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