Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting
The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-...
| Authors: | ; ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Accepted version |
| Publication date: | 2017 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2072/359755 |
| Online Access: | http://hdl.handle.net/2072/359755 https://doi.org/10.1021/acsami.7b09449 |
| Access Level: | Open access |
| Keyword: | 54 |
| _version_ | 1878736046066237440 |
|---|---|
| author | Hegner, Franziska Simone |
| author2 | Herraiz-Cardona, Isaac Cardenas-Morcoso, Drialys López, Núria Galán-Mascarós, José-Ramón Gimenez, Sixto |
| author2_role | author author author author author |
| author_browse | Cardenas-Morcoso, Drialys Galán-Mascarós, José-Ramón Gimenez, Sixto Hegner, Franziska Simone Herraiz-Cardona, Isaac López, Núria |
| author_facet | Hegner, Franziska Simone Herraiz-Cardona, Isaac Cardenas-Morcoso, Drialys López, Núria Galán-Mascarós, José-Ramón Gimenez, Sixto |
| author_role | author |
| collection | Recercat. Dipósit de la Recerca de Catalunya |
| description | The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-type electrocatalysts (CoFe-PB). This combination decreases the onset potential of BiVO4 by ∼0.8 V (down to 0.3 V vs reversible hydrogen electrode (RHE)) and increases the photovoltage by 0.45 V. The presence of the catalyst also leads to a remarkable 6-fold enhancement of the photocurrent at 1.23 V versus RHE, while keeping the light-harvesting ability of BiVO4. Structural and mechanistic studies indicate that CoFe-PB effectively acts as a true catalyst on BiVO4. This mechanism, stemming from the adequate alignment of the energy levels, as showed by density functional theory calculations, allows CoFe-PB to outperform all previous catalyst/BiVO4 junctions and, in addition, leads to noteworthy longterm stability. A bare 10−15% decrease in photocurrent was observed after more than 50 h of operation under light irradiation |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_87d4ec4792e6b0938991e3e6e28aee2d |
| institution | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| instname_str | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:recercat.cat:2072/359755 |
| publishDate | 2017 |
| publishDateSort | 2017 |
| reponame_str | Recercat. Dipósit de la Recerca de Catalunya |
| spelling | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting Hegner, Franziska Simone Herraiz-Cardona, Isaac Cardenas-Morcoso, Drialys López, Núria Galán-Mascarós, José-Ramón Gimenez, Sixto 54 The efficient integration of photoactive and catalytic materials is key to promoting photoelectrochemical water splitting as a sustainable energy technology built on solar power. Here, we report highly stable water splitting photoanodes from BiVO4 photoactive cores decorated with CoFe Prussian blue-type electrocatalysts (CoFe-PB). This combination decreases the onset potential of BiVO4 by ∼0.8 V (down to 0.3 V vs reversible hydrogen electrode (RHE)) and increases the photovoltage by 0.45 V. The presence of the catalyst also leads to a remarkable 6-fold enhancement of the photocurrent at 1.23 V versus RHE, while keeping the light-harvesting ability of BiVO4. Structural and mechanistic studies indicate that CoFe-PB effectively acts as a true catalyst on BiVO4. This mechanism, stemming from the adequate alignment of the energy levels, as showed by density functional theory calculations, allows CoFe-PB to outperform all previous catalyst/BiVO4 junctions and, in addition, leads to noteworthy longterm stability. A bare 10−15% decrease in photocurrent was observed after more than 50 h of operation under light irradiation http://hdl.handle.net/2072/359755 https://doi.org/10.1021/acsami.7b09449 |
| spellingShingle | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting Hegner, Franziska Simone 54 |
| status_str | acceptedVersion |
| title | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting |
| title_full | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting |
| title_fullStr | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting |
| title_full_unstemmed | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting |
| title_short | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting |
| title_sort | Cobalt Hexacyanoferrate on BiVO4 Photoanodes for Robust Water Splitting |
| topic | 54 |
| topic_facet | 54 |
| url | http://hdl.handle.net/2072/359755 https://doi.org/10.1021/acsami.7b09449 |