Highly selective electrochemical reduction of CO2 to HCOOH on a gallium oxide cathode
We report on the high-selectivity electrochemical reduction of CO2 to formic acid (HCOOH) using conductive single-crystal Ga2O3. Single-crystalline Sn- or Si-doped Ga2O3 was manufactured using an edge-defined film-fed growth method. The stability of Ga2O3 was confirmed over fifty cyclic voltammetry...
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Published in | Electrochemistry communications Vol. 43; pp. 95 - 97 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
01.06.2014
Amsterdam Elsevier New York, NY |
Subjects | |
Online Access | Get full text |
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Summary: | We report on the high-selectivity electrochemical reduction of CO2 to formic acid (HCOOH) using conductive single-crystal Ga2O3. Single-crystalline Sn- or Si-doped Ga2O3 was manufactured using an edge-defined film-fed growth method. The stability of Ga2O3 was confirmed over fifty cyclic voltammetry cycles. In our electrolysis experiments, a Ga2O3 cathode selectively produced HCOOH with a Faradaic efficiency of over 80% by electrochemical reduction of CO2. A possible intermediate state is simulated based on density function theory. Our calculations show the so-called formate on Ga2O3 to be a possible intermediate state in the reaction from CO2 to HCOOH.
•The stability of Ga2O3 cathode was confirmed over fifty cyclic voltammetry cycles.•Ga2O3 cathode selectively produced HCOOH with >80% of Faradaic efficiency.•Formate on Ga2O3 is a possible intermediate state in the reaction from CO2 to HCOOH. |
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ISSN: | 1388-2481 1873-1902 |
DOI: | 10.1016/j.elecom.2014.03.023 |