Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting
Sulfur-doped carbon nanohorns (S-CNHs) were prepared by an easy one-pot solvothermal process and were employed as efficient electrocatalysts towards water splitting. Initially, oxidation of CNHs followed by thermal treatment with the Lawesson’s reagent resulted in the formation of S-CNHs with the su...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/12/2416 |
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| author | Antonia Kagkoura Raul Arenal Nikos Tagmatarchis |
| author_facet | Antonia Kagkoura Raul Arenal Nikos Tagmatarchis |
| author_sort | Antonia Kagkoura |
| collection | DOAJ |
| description | Sulfur-doped carbon nanohorns (S-CNHs) were prepared by an easy one-pot solvothermal process and were employed as efficient electrocatalysts towards water splitting. Initially, oxidation of CNHs followed by thermal treatment with the Lawesson’s reagent resulted in the formation of S-CNHs with the sulfur content determined as high as 3%. The S-CNHs were thoroughly characterized by spectroscopic, thermal and electron microscopy imaging means and then electrocatalytically screened. Specifically, S-CNHs showed excellent activity and durability for both O<sub>2</sub> and H<sub>2</sub> evolution reactions, by showing low overpotential at 1.63 and −0.2 V vs. RHE for oxygen and hydrogen evolution reaction, respectively. Additionally, S-CNHs showed significantly lower Tafel slope value and lower current resistance compared to oxidized and pristine CNHs for both electrocatalytic reactions. The outstanding electrocatalytic properties and high conductivity, along with the high S-doping level, render S-CNHs a promising bifunctional electrocatalyst for water splitting. |
| first_indexed | 2024-03-10T14:21:27Z |
| format | Article |
| id | doaj.art-7988c035045041bbbc1f9b42abb40077 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T14:21:27Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-7988c035045041bbbc1f9b42abb400772023-11-20T23:19:17ZengMDPI AGNanomaterials2079-49912020-12-011012241610.3390/nano10122416Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water SplittingAntonia Kagkoura0Raul Arenal1Nikos Tagmatarchis2Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, GreeceLaboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, Mariano Esquillor s/n, 50018 Zaragoza, SpainTheoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, GreeceSulfur-doped carbon nanohorns (S-CNHs) were prepared by an easy one-pot solvothermal process and were employed as efficient electrocatalysts towards water splitting. Initially, oxidation of CNHs followed by thermal treatment with the Lawesson’s reagent resulted in the formation of S-CNHs with the sulfur content determined as high as 3%. The S-CNHs were thoroughly characterized by spectroscopic, thermal and electron microscopy imaging means and then electrocatalytically screened. Specifically, S-CNHs showed excellent activity and durability for both O<sub>2</sub> and H<sub>2</sub> evolution reactions, by showing low overpotential at 1.63 and −0.2 V vs. RHE for oxygen and hydrogen evolution reaction, respectively. Additionally, S-CNHs showed significantly lower Tafel slope value and lower current resistance compared to oxidized and pristine CNHs for both electrocatalytic reactions. The outstanding electrocatalytic properties and high conductivity, along with the high S-doping level, render S-CNHs a promising bifunctional electrocatalyst for water splitting.https://www.mdpi.com/2079-4991/10/12/2416carbon nanohornssulfur-dopingelectrocatalysiswater-splittingoxygen evolution reactionhydrogen evolution reaction |
| spellingShingle | Antonia Kagkoura Raul Arenal Nikos Tagmatarchis Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting Nanomaterials carbon nanohorns sulfur-doping electrocatalysis water-splitting oxygen evolution reaction hydrogen evolution reaction |
| title | Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting |
| title_full | Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting |
| title_fullStr | Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting |
| title_full_unstemmed | Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting |
| title_short | Sulfur-Doped Carbon Nanohorn Bifunctional Electrocatalyst for Water Splitting |
| title_sort | sulfur doped carbon nanohorn bifunctional electrocatalyst for water splitting |
| topic | carbon nanohorns sulfur-doping electrocatalysis water-splitting oxygen evolution reaction hydrogen evolution reaction |
| url | https://www.mdpi.com/2079-4991/10/12/2416 |
| work_keys_str_mv | AT antoniakagkoura sulfurdopedcarbonnanohornbifunctionalelectrocatalystforwatersplitting AT raularenal sulfurdopedcarbonnanohornbifunctionalelectrocatalystforwatersplitting AT nikostagmatarchis sulfurdopedcarbonnanohornbifunctionalelectrocatalystforwatersplitting |