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Zhai Z, Zhang C, Chen B, Liu L, Song H, Yang B, Zheng Z, Li J, Jiang X, Huang N. A Highly Active Porous Mo 2C-Mo 2N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:243. [PMID: 38334514 PMCID: PMC10856447 DOI: 10.3390/nano14030243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/07/2024] [Accepted: 01/16/2024] [Indexed: 02/10/2024]
Abstract
Developing non-precious metal-based electrocatalysts operating in high-current densities is highly demanded for the industry-level electrochemical hydrogen evolution reaction (HER). Here, we report the facile preparation of binder-free Mo2C-Mo2N heterostructures on carbon nanowalls/diamond (CNWs/D) via ultrasonic soaking followed by an annealing treatment. The experimental investigations and density functional theory calculations reveal the downshift of the d-band center caused by the heterojunction between Mo2C/Mo2N triggering highly active interfacial sites with a nearly zero ∆GH* value. Furthermore, the 3D-networked CNWs/D, as the current collector, features high electrical conductivity and large surface area, greatly boosting the electron transfer rate of HER occurring on the interfacial sites of Mo2C-Mo2N. Consequently, the self-supporting Mo2C-Mo2N@CNWs/D exhibits significantly low overpotentials of 137.8 and 194.4 mV at high current densities of 500 and 1000 mA/cm2, respectively, in an alkaline solution, which far surpass the benchmark Pt/C (228.5 and 359.3 mV) and are superior to most transition-metal-based materials. This work presents a cost-effective and high-efficiency non-precious metal-based electrocatalyst candidate for the electrochemical hydrogen production industry.
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Affiliation(s)
- Zhaofeng Zhai
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
- School of Materials Science and Engineering, University of Science and Technology of China, No. 72 Wenhua Road, Shenyang 110016, China
| | - Chuyan Zhang
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
| | - Bin Chen
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
- School of Materials Science and Engineering, University of Science and Technology of China, No. 72 Wenhua Road, Shenyang 110016, China
| | - Lusheng Liu
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
| | - Haozhe Song
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
| | - Bing Yang
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
- School of Materials Science and Engineering, University of Science and Technology of China, No. 72 Wenhua Road, Shenyang 110016, China
| | - Ziwen Zheng
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
- School of Materials Science and Engineering, University of Science and Technology of China, No. 72 Wenhua Road, Shenyang 110016, China
| | - Junyao Li
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
| | - Xin Jiang
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
- Institute of Materials Engineering, University of Siegen, No. 9-11 Paul-Bonatz-Str., 57076 Siegen, Germany
| | - Nan Huang
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, China; (Z.Z.); (C.Z.); (B.C.); (L.L.); (H.S.); (B.Y.); (Z.Z.); (J.L.)
- School of Materials Science and Engineering, University of Science and Technology of China, No. 72 Wenhua Road, Shenyang 110016, China
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He W, Liu H, Cheng J, Mao J, Chen C, Hao Q, Zhao J, Liu C, Li Y, Liang L. Designing Zn-doped nickel sulfide catalysts with an optimized electronic structure for enhanced hydrogen evolution reaction. NANOSCALE 2021; 13:10127-10132. [PMID: 34060571 DOI: 10.1039/d1nr01726h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Designing non-noble-metal electrocatalysts with excellent performance and economic benefits toward the hydrogen evolution reaction (HER) is extremely crucial for future energy development. In particular, the rational cationic-doped strategy can effectively tailor the electronic structure of the catalysts and improve the free energy of the adsorbed intermediate, thus enhancing HER performance. Herein we reported Zn-doped Ni3S2 nanosheet arrays supported on Ni foam (Zn-Ni3S2/NF) that were synthesized by a two-step hydrothermal process for improving HER catalysis under alkaline conditions. Remarkably, the obtained Zn-Ni3S2/NF displays excellent HER catalytic performance with an overpotential of 78 mV to reach a current density of 10 mA cm-2 and dramatic long-term stability for 18 h in 1 M KOH. In addition, the results based on the density functional theory calculations reveal that Zn dopants can modulate the electronic structure of Ni3S2 and optimize the hydrogen adsorption free energy (ΔGH*). Thus cationic-doping engineering provides an efficient method to enhance the intrinsic activities of transition-metal sulfides, which may contribute to the development of nonprecious electrocatalysts for HER.
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Affiliation(s)
- Wenjun He
- School of Materials Science and Engineering, Hebei University of Technology, Dingzigu Road 1, Tianjin 300130, P. R. China.
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