DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Heebin | ko |
dc.contributor.author | Kim, Keon-Han | ko |
dc.contributor.author | Rao, Reshma R. | ko |
dc.contributor.author | Park, Dong Gyu | ko |
dc.contributor.author | Choi, Won Ho | ko |
dc.contributor.author | Choi, Jong Hui | ko |
dc.contributor.author | Kim, Dong Won | ko |
dc.contributor.author | Jung, Do Hwan | ko |
dc.contributor.author | Stephens, Ifan E. L. | ko |
dc.contributor.author | Durrant, James R. | ko |
dc.contributor.author | Kang, Jeung Ku | ko |
dc.date.accessioned | 2024-09-13T00:00:13Z | - |
dc.date.available | 2024-09-13T00:00:13Z | - |
dc.date.created | 2024-09-13 | - |
dc.date.issued | 2024-08 | - |
dc.identifier.citation | MATERIALS HORIZONS, v.11, no.17, pp.4115 - 4122 | - |
dc.identifier.issn | 2051-6347 | - |
dc.identifier.uri | http://hdl.handle.net/10203/322981 | - |
dc.description.abstract | Electrochemical nitrate (NO3-) reduction to ammonia (NH3), which is a high value-added chemical or high-energy density carrier in many applications, could become a key process overcoming the disadvantages of the Haber-Bosch process; however, current electrocatalysts have severe drawbacks in terms of activity, selectivity, and stability. Here, we report the hydrogen radical (H*) pathway as a solution to overcome this challenge, as demonstrated by efficacious electrochemical NO3- reduction to NH3 over the Fe-polyoxometalate (Fe-POM)/Cu hybrid electrocatalyst. Fe-POM, composed of Preyssler anions ([NaP5W30O110](14-)) and Fe cations, facilitates efficient H* generation via H2O + e(-) -> H* + OH-, and H* transfer to the Cu sites of the Fe-POM/Cu catalyst enables selective NO3- reduction to NH3. Operando spectroelectrochemical spectra substantiate the occurrence of the H* pathway through direct observation of Fe redox related to H* generation and Cu redox related to NO3- binding. With the H* pathway, the Fe-POM/Cu electrodes exhibit high activity for NO3- reduction to NH3 with 1.44 mg cm(-2) h(-1) in a 500 ppm NO3-/1 M KOH solution at -0.2 V vs. RHE, which is about 36-fold higher than that of the pristine Cu electrocatalyst. Additionally, it attains high selectivity with a faradaic efficiency of up to 97.09% at -0.2 V vs. RHE while exhibiting high catalytic stability over cycles. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | A hydrogen radical pathway for efficacious electrochemical nitrate reduction to ammonia over an Fe-polyoxometalate/Cu electrocatalyst | - |
dc.type | Article | - |
dc.identifier.wosid | 001250401500001 | - |
dc.identifier.scopusid | 2-s2.0-85196162793 | - |
dc.type.rims | ART | - |
dc.citation.volume | 11 | - |
dc.citation.issue | 17 | - |
dc.citation.beginningpage | 4115 | - |
dc.citation.endingpage | 4122 | - |
dc.citation.publicationname | MATERIALS HORIZONS | - |
dc.identifier.doi | 10.1039/d4mh00418c | - |
dc.contributor.localauthor | Kang, Jeung Ku | - |
dc.contributor.nonIdAuthor | Kim, Keon-Han | - |
dc.contributor.nonIdAuthor | Rao, Reshma R. | - |
dc.contributor.nonIdAuthor | Choi, Won Ho | - |
dc.contributor.nonIdAuthor | Jung, Do Hwan | - |
dc.contributor.nonIdAuthor | Stephens, Ifan E. L. | - |
dc.contributor.nonIdAuthor | Durrant, James R. | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
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