Intentional construction of high-performance SnO 2 catalysts with a 3D porous structure for electrochemical reduction of CO 2
Herein, SnO 2 -NC (SnO 2 -nanocube) and SnO 2 -NF (SnO 2 -nanoflake) electro-catalysts featuring a large specific surface area and 3D porous structure were successfully constructed via acid etching and sulfurization–desulphurization methods, respectively. As catalysts for the electrochemical reducti...
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Published in | Nanoscale Vol. 11; no. 40; pp. 18715 - 18722 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
17.10.2019
|
Online Access | Get full text |
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Summary: | Herein, SnO
2
-NC (SnO
2
-nanocube) and SnO
2
-NF (SnO
2
-nanoflake) electro-catalysts featuring a large specific surface area and 3D porous structure were successfully constructed
via
acid etching and sulfurization–desulphurization methods, respectively. As catalysts for the electrochemical reduction of CO
2
, the faradaic efficiency (
F
HCOO−+CO
= 82.4%, 91.5%, respectively) and partial current density (
j
HCOO−+CO
= 10.7 and 11.5 mA cm
−2
, respectively) of SnO
2
-NCs and SnO
2
-NFs were enhanced in comparison with SnO
2
-NPs (SnO
2
-nanoparticles,
F
HCOO−+CO
= 63.4%,
j
HCOO−+CO
= 5.7 mA cm
−2
) at −1.0 V
vs.
RHE. The enhanced catalytic activity is attributed to their uniform 3D porous structure, high specific surface area and excellent wettability. Additionally, the morphology of SnO
2
-NCs and SnO
2
-NFs was largely preserved after electrolyzing for 12 h (after 12 h of electrolysis), indicating the effective buffering effect of the 3D structure in electrolysis. Naturally, the current density and faradaic efficiency of the SnO
2
-NC and SnO
2
-NF catalysts remained nearly unchanged after long-term stability measurements, revealing great stability. |
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ISSN: | 2040-3364 2040-3372 |
DOI: | 10.1039/C9NR06354D |