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Manjunath V, Bimli S, Singh D, Biswas R, Didwal PN, Haldar KK, Deshpande NG, Bhobe PA, Devan RS. Porous nanorods by stacked NiO nanoparticulate exhibiting corn-like structure for sustainable environmental and energy applications. RSC Adv 2023; 13:21962-21970. [PMID: 37483671 PMCID: PMC10357413 DOI: 10.1039/d3ra03209d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 07/04/2023] [Indexed: 07/25/2023] Open
Abstract
A porous 1D nanostructure provides much shorter electron transport pathways, thereby helping to improve the life cycle of the device and overcome poor ionic and electronic conductivity, interfacial impedance between electrode-electrolyte interface, and low volumetric energy density. In view of this, we report on the feasibility of 1D porous NiO nanorods comprising interlocked NiO nanoparticles as an active electrode for capturing greenhouse CO2, effective supercapacitors, and efficient electrocatalytic water-splitting applications. The nanorods with a size less than 100 nm were formed by stacking cubic crystalline NiO nanoparticles with dimensions less than 10 nm, providing the necessary porosity. The existence of Ni2+ and its octahedral coordination with O2- is corroborated by XPS and EXAFS. The SAXS profile and BET analysis showed 84.731 m2 g-1 surface area for the porous NiO nanorods. The NiO nanorods provided significant surface-area and the active-surface-sites thus yielded a CO2 uptake of 63 mmol g-1 at 273 K via physisorption, a specific-capacitance (CS) of 368 F g-1, along with a retention of 76.84% after 2500 cycles, and worthy electrocatalytic water splitting with an overpotential of 345 and 441 mV for HER and OER activities, respectively. Therefore, the porous 1D NiO as an active electrode shows multifunctionality toward sustainable environmental and energy applications.
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Affiliation(s)
- Vishesh Manjunath
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Indore Khandwa Road, Simrol Indore 453552 India
| | - Santosh Bimli
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Indore Khandwa Road, Simrol Indore 453552 India
| | - Diwakar Singh
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Indore Khandwa Road, Simrol Indore 453552 India
| | | | - Pravin N Didwal
- Department of Materials, University of Oxford Parks Road Oxford OX1 3PH UK
- Department of Materials Science and Engineering, Chonnam National University 77, Yongbongro, Buk-gu Gwangju 61186 South Korea
| | | | - Nishad G Deshpande
- Indian Institute of Information Technology, Surat, Kholvad Campus Kamrej Surat 394190 India
| | - Preeti A Bhobe
- Department of Physics, Indian Institute of Technology Indore Khandwa Road, Simrol Indore 453552 India
| | - Rupesh S Devan
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Indore Khandwa Road, Simrol Indore 453552 India
- Centre for Electric Vehicle & Intelligent Transport Systems, Indian Institute of Technology Indore Khandwa Road, Simrol Indore 453552 India
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Yang M, Yang H, Wang F, Niu Y, Li P. Synergistic effects boosting hydrogen evolution performance of transition metal oxides at ultralow Ru loading levels. RSC Adv 2023; 13:13263-13268. [PMID: 37124022 PMCID: PMC10141579 DOI: 10.1039/d3ra01501g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/21/2023] [Indexed: 05/02/2023] Open
Abstract
In this study, ultralow ruthenium nanoparticles on the nickel molybdate nanorods grown on nickel foam (Ru-NiMoO4-NF) were synthesized. The Ru-NiMoO4-NF exhibited outstanding hydrogen evolution reaction performances in alkaline with overpotential of 52 mV at the current density of 10 mA cm-2. And, it maintains excellent stability for 20 h at the current density of 20 mA cm-2. The mass activity of Ru-NiMoO4-NF is 0.21 A mgRu -1, which is higher than that of Pt/C. Lots of exposed heterojunction interfaces and synergistic effects between Ru nanoparticles and NiMoO4 nanorods were regarded as the reasons for excellent performance. This work provides an innovative route for developing low-cost catalysts based on the transition metal oxides and trace precious metal with unique heterostructures for hydrogen production through water splitting.
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Affiliation(s)
- Miao Yang
- Collaborative Innovation Center of CO2 Conversion and Utilization, Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology Taiyuan Shanxi 030008 P. R. China
| | - Hong Yang
- Collaborative Innovation Center of CO2 Conversion and Utilization, Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology Taiyuan Shanxi 030008 P. R. China
| | - Feng Wang
- Collaborative Innovation Center of CO2 Conversion and Utilization, Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology Taiyuan Shanxi 030008 P. R. China
| | - Yulan Niu
- Collaborative Innovation Center of CO2 Conversion and Utilization, Department of Chemistry and Chemical Engineering, Taiyuan Institute of Technology Taiyuan Shanxi 030008 P. R. China
| | - Pan Li
- Department of Environment and Safety Engineering, Taiyuan Institute of Technology Taiyuan Shanxi 030008 P. R. China
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Liu G, Peng S, Hou F, Wang X, Fang B. Preparation and Performance Study of the Anodic Catalyst Layer via Doctor Blade Coating for PEM Water Electrolysis. MEMBRANES 2022; 13:24. [PMID: 36676831 PMCID: PMC9860758 DOI: 10.3390/membranes13010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
The membrane electrode assembly (MEA) is the core component of proton exchange membrane (PEM) water electrolysis cell, which provides a place for water decomposition to generate hydrogen and oxygen. The microstructure, thickness, IrO2 loading as well as the uniformity and quality of the anodic catalyst layer (ACL) have great influence on the performance of PEM water electrolysis cell. Aiming at providing an effective and low-cost fabrication method for MEA, the purpose of this work is to optimize the catalyst ink formulation and achieve the ink properties required to form an adherent and continuous layer with doctor blade coating method. The ink formulation (e.g., isopropanol/H2O of solvents and solids content) were adjusted, and the doctor blade thickness was optimized. The porous structure and the thickness of the doctor blade coating ACL were further confirmed with the in-plane and the cross-sectional SEM analyses. Finally, the effect of the ink formulation and the doctor blade thickness of the ACL on the cell performance were characterized in a PEM electrolyzer under ambient pressure at 80 °C. Overall, the optimized doctor blade coating ACL showed comparable performance to that prepared with the spraying method. It is proved that the doctor blade coating is capable of high-uniformity coating.
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Affiliation(s)
- Gaoyang Liu
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Shanlong Peng
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Faguo Hou
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Xindong Wang
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Baizeng Fang
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
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Liu G, Hou F, Wang X, Fang B. Robust Porous TiN Layer for Improved Oxygen Evolution Reaction Performance. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15217602. [PMID: 36363193 PMCID: PMC9653776 DOI: 10.3390/ma15217602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/19/2022] [Accepted: 10/27/2022] [Indexed: 05/07/2023]
Abstract
The poor reversibility and slow reaction kinetics of catalytic materials seriously hinder the industrialization process of proton exchange membrane (PEM) water electrolysis. It is necessary to develop high-performance and low-cost electrocatalysts to reduce the loss of reaction kinetics. In this study, a novel catalyst support featured with porous surface structure and good electronic conductivity was successfully prepared by surface modification via a thermal nitriding method under ammonia atmosphere. The morphology and composition characterization-confirmed that a TiN layer with granular porous structure and internal pore-like defects was established on the Ti sheet. Meanwhile, the conductivity measurements showed that the in-plane electronic conductivity of the as-developed material increased significantly to 120.8 S cm−1. After IrOx was loaded on the prepared TiN-Ti support, better dispersion of the active phase IrOx, lower ohmic resistance, and faster charge transfer resistance were verified, and accordingly, more accessible catalytic active sites on the catalytic interface were developed as revealed by the electrochemical characterizations. Compared with the IrOx/Ti, the as-obtained IrOx/TiN-Ti catalyst demonstrated remarkable electrocatalytic activity (η10 mA cm−2 = 302 mV) and superior stability (overpotential degradation rate: 0.067 mV h−1) probably due to the enhanced mass adsorption and transport, good dispersion of the supported active phase IrOx, increased electronic conductivity and improved corrosion resistance provided by the TiN-Ti support.
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Affiliation(s)
- Gaoyang Liu
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Correspondence: (G.L.); (B.F.)
| | - Faguo Hou
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xindong Wang
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Baizeng Fang
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada
- Correspondence: (G.L.); (B.F.)
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Au-TiO 2/Ti Hybrid Coating as a Liquid and Gas Diffusion Layer with Improved Performance and Stability in Proton Exchange Membrane Water Electrolyzer. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196644. [PMID: 36235180 PMCID: PMC9570565 DOI: 10.3390/molecules27196644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/04/2022] [Accepted: 10/05/2022] [Indexed: 11/17/2022]
Abstract
The liquid and gas diffusion layer is a key component of proton exchange membrane water electrolyzer (PEMWE), and its interfacial contact resistance (ICR) and corrosion resistance have a great impact on the performance and durability of PEMWE. In this work, a novel hybrid coating with Au contacts discontinuously embedded in a titanium oxidized layer was constructed on a Ti felt via facile electrochemical metallizing and followed by a pre-oxidization process. The physicochemical characterizations, such as scanning electron microscopy, energy dispersive spectrometer, and X-ray diffraction results confirmed that the distribution and morphology of the Au contacts could be regulated with the electrical pulse time, and a hybrid coating (Au-TiO2/Ti) was eventually achieved after the long-term stability test under anode environment. At the compaction force of 140 N cm-2, the ICR was reduced from 19.7 mΩ cm2 of the P-Ti to 4.2 mΩ cm2 of the Au-TiO2/Ti. The corrosion current density at 1.8 V (RHE) is 0.689 μA cm-2. Both the ICR and corrosion resistance results showed that the prepared protective coating could provide comparable ICR and corrosion resistance to a dense Au coating.
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Liu G, Hou F, Wang X, Fang B. Stainless Steel-Supported Amorphous Nickel Phosphide/Nickel as an Electrocatalyst for Hydrogen Evolution Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3328. [PMID: 36234456 PMCID: PMC9565715 DOI: 10.3390/nano12193328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/21/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Recently, nickel phosphides (Ni-P) in an amorphous state have emerged as potential catalysts with high intrinsic activity and excellent electrochemical stability for hydrogen evolution reactions (HER). However, it still lacks a good strategy to prepare amorphous Ni-P with rich surface defects or structural boundaries, and it is also hard to construct a porous Ni-P layer with favorable electron transport and gas-liquid transport. Herein, an integrated porous electrode consisting of amorphous Ni-P and a Ni interlayer was successfully constructed on a 316L stainless steel felt (denoted as Ni-P/Ni-316L). The results demonstrated that the pH of the plating solution significantly affected the grain size, pore size and distribution, and roughness of the cell-like particle surface of the amorphous Ni-P layer. The Ni-P/Ni-316L prepared at pH = 3 presented the richest surface defects or structural boundaries as well as porous structure. As expected, the as-developed Ni-P/Ni-316L demonstrated the best kinetics, with η10 of 73 mV and a Tafel slope of ca. 52 mV dec-1 for the HER among all the electrocatalysts prepared at various pH values. Furthermore, the Ni-P/Ni-316L exhibited comparable electrocatalytic HER performance and better durability than the commercial Pt (20 wt%)/C in a real water electrolysis cell, indicating that the non-precious metal-based Ni-P/Ni-316L is promising for large-scale processing and practical use.
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Affiliation(s)
- Gaoyang Liu
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Faguo Hou
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Xindong Wang
- Department of Energy Storage Science and Technology, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
- Department of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China
| | - Baizeng Fang
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada
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