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Chen X, Yan S, Wen S, Chen J, Xu J, Wang C, Lu X. Chelating adsorption-engaged synthesis of ultrafine iridium nanoparticles anchored on N-doped carbon nanofibers toward highly efficient hydrogen evolution in both alkaline and acidic media. J Colloid Interface Sci 2023; 641:782-790. [PMID: 36966567 DOI: 10.1016/j.jcis.2023.03.097] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/07/2023] [Accepted: 03/15/2023] [Indexed: 03/31/2023]
Abstract
Developing highly efficient and stable precious metal electrocatalysts toward hydrogen evolution reaction (HER) is crucial for energy application, while it is still challenging to achieve highly dispersed ultrafine metal nanoparticles on some promising supports to synergistically promote their electrocatalytic performance. Herein, we propose a feasible chelating adsorption-engaged strategy by introducing de-doped polyaniline with abundant amino groups to immobilize ultrafine iridium (Ir) nanoparticles on their derived N-doped carbon nanofibers (Ir-NCNFs). Experimental results demonstrate that the synthesized Ir-NCNFs can effectively promote the charge transfer and expose more electrochemical active sites, which eventually accelerate the reaction kinetics. Thus, the synthesized Ir-NCNFs catalyst exhibits admirable HER activities in both alkaline and acidic conditions with overpotentials of only 23 and 8 mV, which are even superior or close to the benchmark Pt/C catalyst. Furthermore, the synthesized Ir-NCNFs catalyst also exhibits a long-term durability. This study affords a reliable means to construct high-performance supported ultrafine metal nanocatalysts for electrocatalytic applications to alleviate the growing demand for energy conversion.
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Rong C, Shen X, Wang Y, Thomsen L, Zhao T, Li Y, Lu X, Amal R, Zhao C. Electronic Structure Engineering of Single-Atom Ru Sites via Co-N4 Sites for Bifunctional pH-Universal Water Splitting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110103. [PMID: 35384087 DOI: 10.1002/adma.202110103] [Citation(s) in RCA: 77] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/25/2022] [Indexed: 06/14/2023]
Abstract
The development of bifunctional water-splitting electrocatalysts that are efficient and stable over a wide range of pH is of great significance but challenging. Here, an atomically dispersed Ru/Co dual-sites catalyst is reported anchored on N-doped carbon (Ru/Co-N-C) for outstanding oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes. The Ru/Co-N-C catalyst requires the overpotential of only 13 and 23 mV for HER, 232 and 247 mV for OER to deliver a current density of 10 mA cmgeo -2 in 0.5 m H2 SO4 and 1 m KOH, respectively, outperforming benchmark catalysts Pt/C and RuO2 . Theoretical calculations reveal that the introduction of Co-N4 sites into Ru/Co-N-C efficiently modify the electronic structure of Ru by enlarging Ru-O covalency and increasing Ru electron density, which in turn optimize the bonding strength between oxygen/hydrogen intermediate species with Ru sites, thereby enhancing OER and HER performance. Furthermore, the incorporation of Co-N4 sites induces electron redistribution around Ru-N4, thus enhancing corrosion-resistance of Ru/Co-N-C during acid and alkaline electrolysis. The Ru/Co-N-C has been applied in a proton exchange membrane water electrolyzer and steady operation is demonstrated at a high current density of 450 mA cmgeo -2 for 330 h.
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Affiliation(s)
- Chengli Rong
- School of Chemistry, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Xiangjian Shen
- Engineering Research Centre of Advanced Functional Material Manufacturing of Ministry of Education, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Yuan Wang
- School of Chemistry, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Lars Thomsen
- Australian Synchrotron ANSTO, 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Tingwen Zhao
- School of Chemistry, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Yibing Li
- School of Chemistry, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Xunyu Lu
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydneys, NSW, 2052, Australia
| | - Rose Amal
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydneys, NSW, 2052, Australia
| | - Chuan Zhao
- School of Chemistry, The University of New South Wales, Sydney, NSW, 2052, Australia
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Hu Z, Zhang L, Huang J, Feng Z, Xiong Q, Ye Z, Chen Z, Li X, Yu Z. Self-supported nickel-doped molybdenum carbide nanoflower clusters on carbon fiber paper for an efficient hydrogen evolution reaction. NANOSCALE 2021; 13:8264-8274. [PMID: 33885697 DOI: 10.1039/d1nr00169h] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Developing an efficient, stable and low-cost noble-metal-free electrocatalyst for the hydrogen evolution reaction (HER) is an effective way to alleviate the energy crisis. Herein, we report a simple and facile approach to synthesize self-supported Ni-doped Mo2C via a molten salt method. By optimizing the content of Ni, the concentration of Ni(NO3)2, and the annealing time, self-supported nanoflower-like electrocatalysts composed of ultrathin nanosheets on carbon fiber paper (CFP) can be achieved. Such a fluffy and porous nanoflower-like structure has a large specific surface area, which can expose many active sites, and promote charge transfer; moreover, all of the above is beneficial for improving the HER performance. Density functional theory (DFT) calculations reveal that the doping of Ni leads to a down shift of the value of the d band center (εd), so that the adsorbed hydrogen (Hads) is easier to desorb from the catalyst surface, thus leading to an enhanced intrinsic catalytic activity of Ni doped Mo2C based catalysts. As a result, Mo2C-3 M Ni(NO3)2/CFP with a nanoflower-like structure prepared at 1000 °C for 6 h exhibits the best electrocatalytic performance for the HER in 0.5 M H2SO4, with a low overpotential of 56 mV (at j = 10 mA cm-2) and a Tafel slope (27.4 mV dec-1) comparable to that of commercial Pt/C (25.8 mV dec-1). The excellent performance surpasses most of the noble-metal-free electrocatalysts. In addition, the outstanding long-term durability of Mo2C-3 M Ni(NO3)2/CFP is demonstrated by showing no obvious fluctuations during 35 h of the HER testing. This work provides a simple and facile strategy for the preparation of nanoelectrocatalysts with high specific surface areas and high catalytic activities, both of which promote an efficient HER.
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Affiliation(s)
- Zhihui Hu
- School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, Jiangxi Province 330063, P.R. China.
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Madani SS, Habibi-Yangjeh A, Asadzadeh-Khaneghah S, Chand H, Krishnan V, Zada A. Integration of Bi4O5I2 nanoparticles with ZnO: Impressive visible-light-induced systems for elimination of aqueous contaminants. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.01.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Mo2C nanospheres anchored on nickel foam as self-supported electrode for high-performance hydrogen production. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Xu Y, Wang J, Liu Z, Zhai Z, Ren B, Dong X, Miao J, Zhang L, Liu Z. Facile preparation of N-doped porous carbon matrix with Mo2C / Ni supported for hydrogen evolution. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Li M, Wang H, Zhu W, Li W, Wang C, Lu X. RuNi Nanoparticles Embedded in N-Doped Carbon Nanofibers as a Robust Bifunctional Catalyst for Efficient Overall Water Splitting. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1901833. [PMID: 31993285 PMCID: PMC6974957 DOI: 10.1002/advs.201901833] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/23/2019] [Indexed: 05/26/2023]
Abstract
Developing high-performance, low-cost, and robust bifunctional electrocatalysts for overall water splitting is extremely indispensable and challenging. It is a promising strategy to couple highly active precious metals with transition metals as efficient electrocatalysts, which can not only effectively reduce the cost of the preparation procedure, but also greatly improve the performance of catalysts through a synergistic effect. Herein, Ru and Ni nanoparticles embedded within nitrogen-doped carbon nanofibers (RuNi-NCNFs) are synthesized via a simple electrospinning technology with a subsequent carbonization process. The as-formed RuNi-NCNFs represent excellent Pt-like electrocatalytic activity for the hydrogen evolution reaction (HER) in both alkaline and acidic conditions. Furthermore, the RuNi-NCNFs also exhibit an outstanding oxygen evolution reaction (OER) activity with an overpotential of 290 mV to achieve a current density of 10 mA cm-2 in alkaline electrolyte. Strikingly, owing to both the HER and OER performance, an electrolyzer with RuNi-NCNFs as both the anode and cathode catalysts requires only a cell voltage of 1.564 V to drive a current density of 10 mA cm-2 in an alkaline medium, which is lower than the benchmark of Pt/C||RuO2 electrodes. This study opens a novel avenue toward the exploration of high efficient but low-cost electrocatalysts for overall water splitting.
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Affiliation(s)
- Meixuan Li
- Alan G. MacDiarmid InstituteCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Huiyuan Wang
- Key Laboratory of Automobile Materials of Ministry of Education and School of Materials Science and EngineeringNanling CampusJilin UniversityNo. 5988 Renmin StreetChangchun130025P. R. China
- International Center of Future ScienceJilin UniversityChangchun130012P. R. China
| | - Wendong Zhu
- Alan G. MacDiarmid InstituteCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Weimo Li
- Alan G. MacDiarmid InstituteCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Ce Wang
- Alan G. MacDiarmid InstituteCollege of ChemistryJilin UniversityChangchun130012P. R. China
| | - Xiaofeng Lu
- Alan G. MacDiarmid InstituteCollege of ChemistryJilin UniversityChangchun130012P. R. China
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Wang B, Wu X, Zhang X, Pang G, Li S. Mo2C-embedded biomass-derived honeycomb-like nitrogen-doped carbon nanosheet/graphene aerogel films for highly efficient electrocatalytic hydrogen evolution. NEW J CHEM 2020. [DOI: 10.1039/c9nj05220h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Honeycomb-like Mo2C@nitrogen-doped carbon nanosheet/graphene aerogel films were synthesized successfully by solid-state reaction between (NH4)6Mo7O24 and regenerated chitin/graphene oxide aerogel.
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Affiliation(s)
- Bo Wang
- Department of Environmental and Chemical Engineering
- Tangshan University
- Tangshan 063000
- P. R. China
| | - Xiaoyu Wu
- Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science and Engineering
- Beihang University
- Beijing
- China
| | - Xiaoyu Zhang
- Department of Environmental and Chemical Engineering
- Tangshan University
- Tangshan 063000
- P. R. China
| | - GuiGui Pang
- Department of Environmental and Chemical Engineering
- Tangshan University
- Tangshan 063000
- P. R. China
| | - Songmei Li
- Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science and Engineering
- Beihang University
- Beijing
- China
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Facile fabrication of novel ZnO/CoMoO 4 nanocomposites: Highly efficient visible-light-responsive photocatalysts in degradations of different contaminants. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.027] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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