Cargando…
Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation
An open-core cobalt polyoxometalate (POM) [(A-α-SiW(9)O(34))Co(4)(OH)(3)(CH(3)COO)(3)](8−)Co(1) and its isostructural Co/Ni-analogue [(A-α-SiW(9)O(34))Co(1.5)Ni(2.5)(OH)(3)(CH(3)COO)(3)](8−)CoNi(2) were synthesized and investigated for their photocatalytic and electrocatalytic performance. Co(1) sho...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8695939/ https://www.ncbi.nlm.nih.gov/pubmed/35423616 http://dx.doi.org/10.1039/d0ra10792a |
_version_ | 1784619693293699072 |
---|---|
author | Güttinger, Robin Wiprächtiger, Giann Blacque, Olivier Patzke, Greta R. |
author_facet | Güttinger, Robin Wiprächtiger, Giann Blacque, Olivier Patzke, Greta R. |
author_sort | Güttinger, Robin |
collection | PubMed |
description | An open-core cobalt polyoxometalate (POM) [(A-α-SiW(9)O(34))Co(4)(OH)(3)(CH(3)COO)(3)](8−)Co(1) and its isostructural Co/Ni-analogue [(A-α-SiW(9)O(34))Co(1.5)Ni(2.5)(OH)(3)(CH(3)COO)(3)](8−)CoNi(2) were synthesized and investigated for their photocatalytic and electrocatalytic performance. Co(1) shows high photocatalytic O(2) yields, which are competitive with leading POM water oxidation catalysts (WOCs). Furthermore, Co(1) and CoNi(2) were employed as well-defined precursors for heterogeneous WOCs. Annealing at various temperatures afforded amorphous and crystalline CoWO(4)- and Co(1.5)Ni(2.5)WO(4)-related nanoparticles. CoWO(4)-related particles formed at 300 °C showed substantial electrocatalytic improvements and were superior to reference materials obtained from co-precipitation/annealing routes. Interestingly, no synergistic interactions between cobalt and nickel centers were observed for the mixed-metal POM precursor and the resulting tungstate catalysts. This stands in sharp contrast to a wide range of studies on various heterogeneous catalyst types which were notably improved through Co/Ni substitution. The results clearly demonstrate that readily accessible POMs are promising precursors for the convenient and low-temperature synthesis of amorphous heterogeneous water oxidation catalysts with enhanced performance compared to conventional approaches. This paves the way to tailoring polyoxometalates as molecular precursors with tuneable transition metal cores for high performance heterogeneous electrocatalysts. Our results furthermore illustrate the key influence of the synthetic history on the performance of oxide catalysts and highlight the dependence of synergistic metal interactions on the structural environment. |
format | Online Article Text |
id | pubmed-8695939 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-86959392022-04-13 Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation Güttinger, Robin Wiprächtiger, Giann Blacque, Olivier Patzke, Greta R. RSC Adv Chemistry An open-core cobalt polyoxometalate (POM) [(A-α-SiW(9)O(34))Co(4)(OH)(3)(CH(3)COO)(3)](8−)Co(1) and its isostructural Co/Ni-analogue [(A-α-SiW(9)O(34))Co(1.5)Ni(2.5)(OH)(3)(CH(3)COO)(3)](8−)CoNi(2) were synthesized and investigated for their photocatalytic and electrocatalytic performance. Co(1) shows high photocatalytic O(2) yields, which are competitive with leading POM water oxidation catalysts (WOCs). Furthermore, Co(1) and CoNi(2) were employed as well-defined precursors for heterogeneous WOCs. Annealing at various temperatures afforded amorphous and crystalline CoWO(4)- and Co(1.5)Ni(2.5)WO(4)-related nanoparticles. CoWO(4)-related particles formed at 300 °C showed substantial electrocatalytic improvements and were superior to reference materials obtained from co-precipitation/annealing routes. Interestingly, no synergistic interactions between cobalt and nickel centers were observed for the mixed-metal POM precursor and the resulting tungstate catalysts. This stands in sharp contrast to a wide range of studies on various heterogeneous catalyst types which were notably improved through Co/Ni substitution. The results clearly demonstrate that readily accessible POMs are promising precursors for the convenient and low-temperature synthesis of amorphous heterogeneous water oxidation catalysts with enhanced performance compared to conventional approaches. This paves the way to tailoring polyoxometalates as molecular precursors with tuneable transition metal cores for high performance heterogeneous electrocatalysts. Our results furthermore illustrate the key influence of the synthetic history on the performance of oxide catalysts and highlight the dependence of synergistic metal interactions on the structural environment. The Royal Society of Chemistry 2021-03-18 /pmc/articles/PMC8695939/ /pubmed/35423616 http://dx.doi.org/10.1039/d0ra10792a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Güttinger, Robin Wiprächtiger, Giann Blacque, Olivier Patzke, Greta R. Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
title | Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
title_full | Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
title_fullStr | Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
title_full_unstemmed | Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
title_short | Co/Ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
title_sort | co/ni-polyoxotungstate photocatalysts as precursor materials for electrocatalytic water oxidation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8695939/ https://www.ncbi.nlm.nih.gov/pubmed/35423616 http://dx.doi.org/10.1039/d0ra10792a |
work_keys_str_mv | AT guttingerrobin conipolyoxotungstatephotocatalystsasprecursormaterialsforelectrocatalyticwateroxidation AT wiprachtigergiann conipolyoxotungstatephotocatalystsasprecursormaterialsforelectrocatalyticwateroxidation AT blacqueolivier conipolyoxotungstatephotocatalystsasprecursormaterialsforelectrocatalyticwateroxidation AT patzkegretar conipolyoxotungstatephotocatalystsasprecursormaterialsforelectrocatalyticwateroxidation |