Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions

Expedition of electron transfer efficiency and optimization of surface reactant adsorption products desorption processes are two main challenges for developing non-noble catalysts in the oxygen reduction reaction (ORR) and CO2 reduction reaction (CRR). A heterojunction prototype on Co3 S4 @Co3 O4 co...

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محفوظ في:
التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Yan, Yibo, Li, Kaixin, Chen, Xiaoping, Yang, Yanhui, Lee, Jong-Min
مؤلفون آخرون: School of Chemical and Biomedical Engineering
التنسيق: مقال
اللغة:English
منشور في: 2020
الموضوعات:
الوصول للمادة أونلاين:https://hdl.handle.net/10356/139236
الوسوم: إضافة وسم
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المؤسسة: Nanyang Technological University
اللغة: English
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spelling sg-ntu-dr.10356-1392362020-05-18T06:21:16Z Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions Yan, Yibo Li, Kaixin Chen, Xiaoping Yang, Yanhui Lee, Jong-Min School of Chemical and Biomedical Engineering Engineering::Chemical engineering CO2 Reduction Co3S4@Co3O4 Core–shell Octahedrons Expedition of electron transfer efficiency and optimization of surface reactant adsorption products desorption processes are two main challenges for developing non-noble catalysts in the oxygen reduction reaction (ORR) and CO2 reduction reaction (CRR). A heterojunction prototype on Co3 S4 @Co3 O4 core-shell octahedron structure is established via hydrothermal lattice anion exchange protocol to implement the electroreduction of oxygen and carbon dioxide with high performance. The synergistic bifunctional catalyst consists of p-type Co3 O4 core and n-type Co3 S4 shell, which afford high surface electron density along with high capacitance without sacrificing mechanical robustness. A four electron ORR process, identical to the Pt catalyzed ORR, is validated using the core-shell octahedron catalyst. The synergistic interaction between cobalt sulfide and cobalt oxide bicatalyst reduces the activation energy to convert CO2 into adsorbed intermediates and hereby enables CRR to run at a low overpotential, with formate as the highly selective main product at a high faraday efficiency of 85.3%. The remarkable performance can be ascribed to the synergistic coupling effect of the structured co-catalysts; heterojunction structure expedites the electron transfer efficiency and optimizes surface reactant adsorption product desorption processes, which also provide theoretical and pragmatic guideline for catalyst development and mechanism explorations. MOE (Min. of Education, S’pore) 2020-05-18T06:21:16Z 2020-05-18T06:21:16Z 2017 Journal Article Yan, Y., Li, K., Chen, X., Yang, Y., & Lee, J.-M. (2017). Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions. Small, 13(47), 1701724-. doi:10.1002/smll.201701724 1613-6810 https://hdl.handle.net/10356/139236 10.1002/smll.201701724 29112335 2-s2.0-85037979289 47 13 en Small © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Chemical engineering
CO2 Reduction
Co3S4@Co3O4 Core–shell Octahedrons
spellingShingle Engineering::Chemical engineering
CO2 Reduction
Co3S4@Co3O4 Core–shell Octahedrons
Yan, Yibo
Li, Kaixin
Chen, Xiaoping
Yang, Yanhui
Lee, Jong-Min
Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
description Expedition of electron transfer efficiency and optimization of surface reactant adsorption products desorption processes are two main challenges for developing non-noble catalysts in the oxygen reduction reaction (ORR) and CO2 reduction reaction (CRR). A heterojunction prototype on Co3 S4 @Co3 O4 core-shell octahedron structure is established via hydrothermal lattice anion exchange protocol to implement the electroreduction of oxygen and carbon dioxide with high performance. The synergistic bifunctional catalyst consists of p-type Co3 O4 core and n-type Co3 S4 shell, which afford high surface electron density along with high capacitance without sacrificing mechanical robustness. A four electron ORR process, identical to the Pt catalyzed ORR, is validated using the core-shell octahedron catalyst. The synergistic interaction between cobalt sulfide and cobalt oxide bicatalyst reduces the activation energy to convert CO2 into adsorbed intermediates and hereby enables CRR to run at a low overpotential, with formate as the highly selective main product at a high faraday efficiency of 85.3%. The remarkable performance can be ascribed to the synergistic coupling effect of the structured co-catalysts; heterojunction structure expedites the electron transfer efficiency and optimizes surface reactant adsorption product desorption processes, which also provide theoretical and pragmatic guideline for catalyst development and mechanism explorations.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Yan, Yibo
Li, Kaixin
Chen, Xiaoping
Yang, Yanhui
Lee, Jong-Min
format Article
author Yan, Yibo
Li, Kaixin
Chen, Xiaoping
Yang, Yanhui
Lee, Jong-Min
author_sort Yan, Yibo
title Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
title_short Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
title_full Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
title_fullStr Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
title_full_unstemmed Heterojunction‐assisted Co3S4@Co3O4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
title_sort heterojunction‐assisted co3s4@co3o4 core – shell octahedrons for supercapacitors and both oxygen and carbon dioxide reduction reactions
publishDate 2020
url https://hdl.handle.net/10356/139236
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