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Ou C, Huang Z, Yan X, Kong X, Chen X, Li S, Wang L, Wan Z. Rational Construction of Honeycomb-like Carbon Network-Encapsulated MoSe 2 Nanocrystals as Bifunctional Catalysts for Highly Efficient Water Splitting. Molecules 2024; 29:3877. [PMID: 39202956 PMCID: PMC11357002 DOI: 10.3390/molecules29163877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 08/09/2024] [Accepted: 08/13/2024] [Indexed: 09/03/2024] Open
Abstract
The scalable fabrication of cost-efficient bifunctional catalysts with enhanced hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance plays a significant role in overall water splitting in hydrogen production fields. MoSe2 is considered to be one of the most promising candidates because of its low cost and high catalytic activity. Herein, hierarchical nitrogen-doped carbon networks were constructed to enhance the catalytic activity of the MoSe2-based materials by scalable free-drying combined with an in situ selenization strategy. The rationally designed carbonaceous network-encapsulated MoSe2 composite (MoSe2/NC) endows a continuous honeycomb-like structure. When utilized as a bifunctional electrocatalyst for both HER and OER, the MoSe2/NC electrode exhibits excellent electrochemical performance. Significantly, the MoSe2/NC‖MoSe2/NC cells require a mere 1.5 V to reach a current density of 10 mA cm-2 for overall water splitting in 1 M KOH. Ex situ characterizations and electrochemical kinetic analysis reveal that the superior catalytic performance of the MoSe2/NC composite is mainly attributed to fast electron and ion transportation and good structural stability, which is derived from the abundant active sites and excellent structural flexibility of the honeycomb-like carbon network. This work offers a promising pathway to the scalable fabrication of advanced non-noble bifunctional electrodes for highly efficient hydrogen evolution.
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Affiliation(s)
- Changjie Ou
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
| | - Zhongkai Huang
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
| | - Xiaoyu Yan
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
| | - Xiangzhong Kong
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
- School of Energy and Electrical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;
| | - Xi Chen
- School of Energy and Electrical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;
| | - Shi Li
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
| | - Lihua Wang
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
- School of Energy and Electrical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;
| | - Zhongmin Wan
- College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; (C.O.); (Z.H.); (X.Y.); (S.L.); (L.W.)
- School of Energy and Electrical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;
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Zhang D, Dong W, Liu Y, Gu X, Yang T, Hong Q, Li D, Zhang D, Zhou H, Huang H, Mao B, Kang Z, Shi W. Ag-In-Zn-S Quantum Dot-Dominated Interface Kinetics in Ag-In-Zn-S/NiFe LDH Composites toward Efficient Photoassisted Electrocatalytic Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2021; 13:42125-42137. [PMID: 34432420 DOI: 10.1021/acsami.1c09948] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoassisted electrocatalysis (P-EC) emerges as a rising star for hydrogen production by embedding photoactive species in electrocatalysts, for which the interfacial structure design and charge transfer kinetics of the multifunctional catalysts remain a great challenge. Herein, Zn-AgIn5S8 quantum dots (ZAIS QDs) were embedded into 2D NiFe layered double hydroxide nanosheets through a simple hydrothermal treatment to form 0D/2D composite catalysts for P-EC. With evidence from transient photovoltage spectroscopy, we acquired a clear and fundamental understanding on the kinetics of charge extraction time and extraction amount in the 0D/2D heterojunctions that was proved to play a key role in P-EC. Upon light illumination, for HER, the optimized NiFe-ZAIS exhibits obviously reduced overpotentials of 129 and 242 mV at current densities of 10 and 50 mA cm-2, which are 22 and 33 mV lower than those of dark electrocatalysis, respectively. For OER, the NiFe-ZAIS electrode also shows low overpotentials of 220 and 268 mV at current densities of 10 and 50 mA cm-2, respectively, under light illumination, which were able to almost double the intrinsic activity. Finally, with NF@NiFe-ZAIS as both the cathode and the anode, the assembled electrolyzer only requires 1.62 V to reach the overall water splitting current density of 10 mA cm-2 under P-EC. This work provides a useful example for the profound understanding of the design and the kinetics study of multifunctional P-EC catalysts.
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Affiliation(s)
- Dongxu Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Weixuan Dong
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Yanhong Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Xiaoqing Gu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Tianyu Yang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Qiang Hong
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Di Li
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Dongqi Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Hongbo Zhou
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Hui Huang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Baodong Mao
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Zhenhui Kang
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa 999078, Macau SAR, China
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, China
| | - Weidong Shi
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
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