Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR)
Developing low-cost electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR), applied in dye-sensitized solar cells (DSCs) and Zinc-air batteries (ZABs) is of crucial significance for the fields of energy conversion and energy storage. Herein, nitrogen-enriched ho...
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Elsevier
2025-04-01
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| author | Ziyu Guo Wenyu Gong Jianing Guo Mingxing Wu |
| author_facet | Ziyu Guo Wenyu Gong Jianing Guo Mingxing Wu |
| author_sort | Ziyu Guo |
| collection | DOAJ |
| description | Developing low-cost electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR), applied in dye-sensitized solar cells (DSCs) and Zinc-air batteries (ZABs) is of crucial significance for the fields of energy conversion and energy storage. Herein, nitrogen-enriched hollow carbon nanofibers with opens at both ends (HCNFs) are first synthesized, which show decent catalytic activity for the IRR, and a power conversion efficiency (PCE) of 6.95 % is achieved by the corresponding DSCs. Cobalt (II) phthalocyanine derived Co3O4 incorporated HCNFs (Co3O4@HCNFs) are further prepared to improve the catalytic activity, generating a high PCE of 8.36 %, indicating a photovoltaic enhancement of 20.3 % as compared with HCNFs. Similarly, Co3O4@HCNFs also exhibit excellent ORR performance, and the half-wave potential (E1/2) is up to 0.827 V, with the limiting current density (Jlim) improved to 4.54 mA·cm−2. In contrast, the E1/2 and Jlim of the pristine HCNFs are 0.630 V and 3.99 mA·cm−2, respectively, much lower than those of Co3O4@HCNFs. The remarkable catalytic activity of Co3O4@HCNFs can be ascribed the introduced Co3O4, resulting in additional active sites of Co-N-C, and the synergistic effects between metals and carbon also accounts for the enhanced catalytic activity. Moreover, the specific hollow structure with opens at both ends is beneficial for mass diffusion to ensure sufficient contact between the electrolyte and the electrocatalysts, which is also a possible reason for the high catalytic activity of Co3O4@HCNFs. This work is expected to provide a feasible strategy for exploring low-cost and highly effective bifunctional IRR/ORR electrocatalysts for DSCs and ZABs. |
| format | Article |
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| institution | Kabale University |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
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| series | Next Materials |
| spelling | doaj-art-5e2d0eee75d245a18bf8726f4b52ba542025-02-06T05:13:08ZengElsevierNext Materials2949-82282025-04-017100518Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR)Ziyu Guo0Wenyu Gong1Jianing Guo2Mingxing Wu3Hebei Key Laboratory of Inorganic Nano–materials, Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Engineering Research Center of Thin Film Solar Cell Materials and Devices，Hebei province, College of Chemistry and Material Science, Hebei Normal University, No. 20 Rd. East of 2nd Ring South, Yuhua District, Shijiazhuang, Hebei 050024, ChinaHebei Key Laboratory of Inorganic Nano–materials, Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Engineering Research Center of Thin Film Solar Cell Materials and Devices，Hebei province, College of Chemistry and Material Science, Hebei Normal University, No. 20 Rd. East of 2nd Ring South, Yuhua District, Shijiazhuang, Hebei 050024, ChinaCorresponding authors.; Hebei Key Laboratory of Inorganic Nano–materials, Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Engineering Research Center of Thin Film Solar Cell Materials and Devices，Hebei province, College of Chemistry and Material Science, Hebei Normal University, No. 20 Rd. East of 2nd Ring South, Yuhua District, Shijiazhuang, Hebei 050024, ChinaCorresponding authors.; Hebei Key Laboratory of Inorganic Nano–materials, Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Engineering Research Center of Thin Film Solar Cell Materials and Devices，Hebei province, College of Chemistry and Material Science, Hebei Normal University, No. 20 Rd. East of 2nd Ring South, Yuhua District, Shijiazhuang, Hebei 050024, ChinaDeveloping low-cost electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR), applied in dye-sensitized solar cells (DSCs) and Zinc-air batteries (ZABs) is of crucial significance for the fields of energy conversion and energy storage. Herein, nitrogen-enriched hollow carbon nanofibers with opens at both ends (HCNFs) are first synthesized, which show decent catalytic activity for the IRR, and a power conversion efficiency (PCE) of 6.95 % is achieved by the corresponding DSCs. Cobalt (II) phthalocyanine derived Co3O4 incorporated HCNFs (Co3O4@HCNFs) are further prepared to improve the catalytic activity, generating a high PCE of 8.36 %, indicating a photovoltaic enhancement of 20.3 % as compared with HCNFs. Similarly, Co3O4@HCNFs also exhibit excellent ORR performance, and the half-wave potential (E1/2) is up to 0.827 V, with the limiting current density (Jlim) improved to 4.54 mA·cm−2. In contrast, the E1/2 and Jlim of the pristine HCNFs are 0.630 V and 3.99 mA·cm−2, respectively, much lower than those of Co3O4@HCNFs. The remarkable catalytic activity of Co3O4@HCNFs can be ascribed the introduced Co3O4, resulting in additional active sites of Co-N-C, and the synergistic effects between metals and carbon also accounts for the enhanced catalytic activity. Moreover, the specific hollow structure with opens at both ends is beneficial for mass diffusion to ensure sufficient contact between the electrolyte and the electrocatalysts, which is also a possible reason for the high catalytic activity of Co3O4@HCNFs. This work is expected to provide a feasible strategy for exploring low-cost and highly effective bifunctional IRR/ORR electrocatalysts for DSCs and ZABs.http://www.sciencedirect.com/science/article/pii/S294982282500036XCounter electrodeDSCsIRRORRCarbon nanofiber |
| spellingShingle | Ziyu Guo Wenyu Gong Jianing Guo Mingxing Wu Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR) Next Materials Counter electrode DSCs IRR ORR Carbon nanofiber |
| title | Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR) |
| title_full | Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR) |
| title_fullStr | Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR) |
| title_full_unstemmed | Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR) |
| title_short | Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR) |
| title_sort | cobalt ii phthalocyanine derived co3o4 hcnfs as highly effective bifunctional electrocatalysts for iodide redox couple reduction irr and oxygen reduction reaction orr |
| topic | Counter electrode DSCs IRR ORR Carbon nanofiber |
| url | http://www.sciencedirect.com/science/article/pii/S294982282500036X |
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