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Seo DB, Kwon YM, Kim J, Kang S, Yim S, Lee SS, Kim ET, Song W, An KS. Edge-Rich 3D Structuring of Metal Chalcogenide/Graphene with Vertical Nanosheets for Efficient Photocatalytic Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28613-28624. [PMID: 38785040 DOI: 10.1021/acsami.4c04329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Constructing pertinent nanoarchitecture with abundant exposed active sites is a valid strategy for boosting photocatalytic hydrogen generation. However, the controllable approach of an ideal architecture comprising vertically standing transition metal chalcogenides (TMDs) nanosheets on a 3D graphene network remains challenging despite the potential for efficient photocatalytic hydrogen production. In this study, we fabricated edge-rich 3D structuring photocatalysts involving vertically grown TMDs nanosheets on a 3D porous graphene framework (referred to as 3D Gr). 2D TMDs (MoS2 and WS2)/3D Gr heterostructures were produced by location-specific photon-pen writing and metal-organic chemical vapor deposition for maximum edge site exposure enabling efficient photocatalytic reactivity. Vertically aligned 2D Mo(W)S2/3D Gr heterostructures exhibited distinctly boosted hydrogen production because of the 3D Gr caused by synergetic impacts associated with the large specific surface area and improved density of exposed active sites in vertically standing Mo(W)S2. The heterostructure involving graphene and TMDs corroborates an optimum charge transport pathway to rapidly separate the photogenerated electron-hole pairs, allowing more electrons to contribute to the photocatalytic hydrogen generation reaction. Consequently, the size-tailored heterostructure showed a superior hydrogen generation rate of 6.51 mmol g-1 h-1 for MoS2/3D graphene and 7.26 mmol g-1 h-1 for WS2/3D graphene, respectively, which were 3.59 and 3.76 times greater than that of MoS2 and WS2 samples. This study offers a promising path for the potential of 3D structuring of vertical TMDs/graphene heterostructure with edge-rich nanosheets for photocatalytic applications.
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Affiliation(s)
- Dong-Bum Seo
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Yeong Min Kwon
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Jin Kim
- Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Saewon Kang
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Soonmin Yim
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Sun Sook Lee
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Eui-Tae Kim
- Department of Materials Science & Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Wooseok Song
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
- School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon 16149, Republic of Korea
| | - Ki-Seok An
- Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
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Sakthivel M, Ho KC. X-CoOTe ( X = S, Se, and P) with Oxygen/Tellurium Dual Vacancies and Banana Stem Fiber-Derived Carbon Fiber as Battery-Type Cathode and Anode Materials for Asymmetric Supercapacitor. ACS APPLIED MATERIALS & INTERFACES 2024; 16:18754-18767. [PMID: 38563749 DOI: 10.1021/acsami.3c18205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
In this work, we demonstrated the synthesis of anions (X = selenium (Se), sulfur (S), and phosphorus (P)) doped cobalt oxytelluride (X-CoOTe) with oxygen and tellurium dual vacancies using hydrothermal methods, followed by selenization, sulfurization, and phosphorization reactions. Especially, the Se-CoOTe-modified nickel foam (Se-CoOTe/NF) electrode delivered a higher specific capacity (752.95 C/g) and an extremely lower charge transfer resistance (0.87 Ω) than S-CoOTe/NF and P-CoOTe/NF due to the higher metallic conductivity of Se. Both oxygen and tellurium vacancies facilitate higher charge transfer conductivity, specific capacity, and stability. On the other hand, banana stem core fiber-derived activated carbon fiber (AC) with exfoliated carbon sheet, cracked surface, and corresponding high surface area boosts the excellent cycle stability up to 4000 cycles with capacitance retention of 100.29%. Thus, the asymmetric device (Se-CoOTe/NF//AC/NF) exhibited an extendable cell voltage (1.55 V), higher energy density (155.6 W h kg-1) at a power density (1356.2 W kg-1), and generous long-term stability (100% retention up to 10 000 cycles) in a liquid alkaline electrolyte. In the practicability test, the proposed asymmetric device mutually showed an increased operating voltage from 1.55 to 4.65 V for a three-series connection. In a three-series connection, a single white LED and an LED string glowed efficiently. This new finding will be very useful to develop tellurium-based chalcogenides and biowaste-derived carbon for energy storage applications.
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Affiliation(s)
- Mani Sakthivel
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Kuo-Chuan Ho
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
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Qi Y, Wu J, Xu J, Gao H, Du Z, Liu B, Liu L, Xiong D. One-step fabrication of a self-supported Co@CoTe2 electrocatalyst for efficient and durable oxygen evolution reactions. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00372g] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The optimal hydrothermal synthesis of a Co@CoTe2-240 electrode needs an overpotential of 286 mV to achieve a current density of 10 mA cm−2 and is able to sustain galvanostatic OER electrolysis for 16 hours with little degradation of less than 20 mV.
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Affiliation(s)
- Yu Qi
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Jie Wu
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Junyuan Xu
- International Iberian Nanotechnology Laboratory (INL)
- 4715-330 Braga
- Portugal
| | - Han Gao
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Zijuan Du
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Baoshun Liu
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Lifeng Liu
- International Iberian Nanotechnology Laboratory (INL)
- 4715-330 Braga
- Portugal
| | - Dehua Xiong
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
- Wuhan National Laboratory for Optoelectronics
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