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Jin S, Shi Z, Wang R, Guo Y, Wang L, Hu Q, Liu K, Li N, Zhou A. 2D MoB MBene: An Efficient Co-Catalyst for Photocatalytic Hydrogen Production under Visible Light. ACS Nano 2024. [PMID: 38687979 DOI: 10.1021/acsnano.4c02642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Highly active and low-cost co-catalysts have a positive effect on the enhancement of solar H2 production. Here, we employ two-dimensional (2D) MBene as a noble-metal-free co-catalyst to boost semiconductor for photocatalytic H2 production. MoB MBene is a 2D nanoboride, which is directly made from MoAlB by a facile hydrothermal etching and manual scraping off process. The as-synthesized MoB MBene with purity >95 wt % is treated by ultrasonic cell pulverization to obtain ultrathin 2D MoB MBene nanosheets (∼0.61 nm) and integrated with CdS via an electrostatic interaction strategy. The CdS/MoB composites exhibit an ultrahigh photocatalytic H2 production activity of 16,892 μmol g-1 h-1 under visible light, surpassing that of pure CdS by an exciting factor of ≈1135%. Theoretical calculations and various measurements account for the high performance in terms of Gibbs free energy, work functions, and photoelectrochemical properties. This work discovers the huge potential of these promising 2D MBene family materials as high-efficiency and low-cost co-catalysts for photocatalytic H2 production.
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Affiliation(s)
- Sen Jin
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Zuhao Shi
- State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan 430070, China
| | - Ruige Wang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Yitong Guo
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Libo Wang
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Qianku Hu
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
| | - Kai Liu
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Neng Li
- State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan 430070, China
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Aiguo Zhou
- School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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Jing C, Huang L, Tao S, Chen Y, Zhang S, Dong W, Ling F, Tang X, Li Y, Feng L, Zhang Y. Construction of MoB@LDH heterojunction and its derivates through phase and interface engineering for advanced supercapacitor applications. J Colloid Interface Sci 2024; 660:10-20. [PMID: 38241858 DOI: 10.1016/j.jcis.2023.12.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/24/2023] [Accepted: 12/30/2023] [Indexed: 01/21/2024]
Abstract
Layered double hydroxide (LDH) has been attracted widespread attention in supercapacitor due to their unique layered structure and associated advantages. However, the inherent limitations of low electrical conductivity and reaction kinetics rate of LDH restrict its widespread application. Various modification techniques, such as heterojunction formation, phosphorization and introduction of phosphorus vacancies, are employed to modify LDH with the goal of improving the electrochemical performance. Preparation of composite materials using MoB MBene as conductive template and phosphorization are the effective ways for enhancing the electrical conductivity of electrode materials. MoB MBene is prepared using a modified method that combines NaOH etching and a high-temperature hydrothermal process. The presence of phosphorus vacancy is beneficial for enhancing the kinetics rate during electrode reactions. Through the synergistic effect of various modification methods, MP2 demonstrates an optimal electrochemical performance with a superior specific capacitance of 1731.19F/g (238.28 mAh g-1) at 1 A/g. It also demonstrates an impressive rate capacity of 81.28 % at 10 A/g and maintains a satisfactory capacitance retention of 88.14 % after 5000 cycles. In addition, a fabricated MP2//AC ASC device achieves an impressive energy density of 39.91 Wh kg-1 at the power density of 948.25 W kg-1 and demonstrates satisfactory cycling stability of 78.76 % after 5000 cycles. This work presents a comprehensive framework for analyzing the impact of material structure, components, and crystal phases on energy storage performance. It also examines the regulatory impact of different modification methods on energy storage mechanisms.
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Affiliation(s)
- Chuan Jing
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China; Water Environment Engineering Technology Innovation Center, Chongqing Academy of Eco-Environmental Sciences, Chongqing 401120, PR China.
| | - Leyi Huang
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Shengrong Tao
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Yancheng Chen
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Shuijie Zhang
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Wei Dong
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Faling Ling
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China.
| | - Xiao Tang
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Yanhong Li
- College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China
| | - Li Feng
- Water Environment Engineering Technology Innovation Center, Chongqing Academy of Eco-Environmental Sciences, Chongqing 401120, PR China.
| | - Yuxin Zhang
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China
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