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Wang C, Geng L, Bi Y. Highly Active Oxygen Evolution Integrating with Highly Selective CO 2-to-CO Reduction. NANO-MICRO LETTERS 2025; 17:184. [PMID: 40074988 PMCID: PMC11904044 DOI: 10.1007/s40820-025-01688-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2024] [Accepted: 02/06/2025] [Indexed: 03/14/2025]
Abstract
Artificial carbon fixation is a promising pathway for achieving the carbon cycle and environment remediation. However, the sluggish kinetics of oxygen evolution reaction (OER) and poor selectivity of CO2 reduction seriously limited the overall conversion efficiencies of solar energy to chemical fuels. Herein, we demonstrated a facile and feasible strategy to rationally regulate the coordination environment and electronic structure of surface-active sites on both photoanode and cathode. More specifically, the defect engineering has been employed to reduce the coordination number of ultrathin FeNi catalysts decorated on BiVO4 photoanodes, resulting in one of the highest OER activities of 6.51 mA cm-2 (1.23 VRHE, AM 1.5G). Additionally, single-atom cobalt (II) phthalocyanine anchoring on the N-rich carbon substrates to increase Co-N coordination number remarkably promotes CO2 adsorption and activation for high selective CO production. Their integration achieved a record activity of 109.4 μmol cm-2 h-1 for CO production with a faradaic efficiency of > 90%, and an outstanding solar conversion efficiency of 5.41% has been achieved by further integrating a photovoltaic utilizing the sunlight (> 500 nm).
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Affiliation(s)
- Chaowei Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Laihong Geng
- Gansu Research Institute of Chemical Industry Co., Ltd, Lanzhou, 730000, People's Republic of China
| | - Yingpu Bi
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People's Republic of China.
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Xu D, Zhang C, Liu Y, Ye Q, Lu J, Zhao Y, Ma J, Cheng Y. Room-Temperature Synthesis of Amorphous Fe-Doped Nickel Phosphate for High-Efficiency Alkaline Seawater Oxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2025; 21:e2410739. [PMID: 39895197 DOI: 10.1002/smll.202410739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2024] [Revised: 01/15/2025] [Indexed: 02/04/2025]
Abstract
The construction of an efficient and durable oxygen evolution reaction (OER) electrocatalyst through a simple synthesis strategy is crucial for the hydrogen produced from seawater splitting. However, achieving this goal remains a great challenge. Herein, the synthesis of amorphous Fe-doped nickel phosphate (Fe-NixPO4) as a high-performance OER electrocatalysts for alkaline freshwater/seawater splitting is presented using a straightforward co-precipitation method at room-temperature. Experimental results reveal the structural reconstruction of Fe-NixPO4 into Fe-doped NiOOH decorated with PO4 3-. The collaborative interplay between Ni2+ and Fe3+, along with the decoration of PO4 3-, can effectively modulate the electronic environment of the electrocatalyst. Consequently, the optimized Fe-NixPO4 exhibits exceptional OER activity, requiring overpotentials of 359 and 422 mV to generate 1000 mA cm-2 in alkaline freshwater and alkaline seawater, respectively. Moreover, Fe-NixPO4 also displays outstanding stability for 100 h at 100 mA cm-2 in alkaline seawater. This research presents a viable approach for fabricating OER electrocatalysts with exceptional efficiency for seawater electrolysis.
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Affiliation(s)
- Deshuang Xu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
| | - Chenxi Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
| | - Yun Liu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
| | - Qing Ye
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
| | - Jinjun Lu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
| | - Yanxia Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
| | - Jiani Ma
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Shaanxi, Xi'an, 710119, China
| | - Yongliang Cheng
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, 710127, China
- Shaanxi Key Laboratory for Carbon Neutral Technology, Northwest University, Xi'an, 710127, China
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Deshmukh MA, Bakandritsos A, Zbořil R. Bimetallic Single-Atom Catalysts for Water Splitting. NANO-MICRO LETTERS 2024; 17:1. [PMID: 39317789 PMCID: PMC11422407 DOI: 10.1007/s40820-024-01505-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Accepted: 08/10/2024] [Indexed: 09/26/2024]
Abstract
Green hydrogen from water splitting has emerged as a critical energy vector with the potential to spearhead the global transition to a fossil fuel-independent society. The field of catalysis has been revolutionized by single-atom catalysts (SACs), which exhibit unique and intricate interactions between atomically dispersed metal atoms and their supports. Recently, bimetallic SACs (bimSACs) have garnered significant attention for leveraging the synergistic functions of two metal ions coordinated on appropriately designed supports. BimSACs offer an avenue for rich metal-metal and metal-support cooperativity, potentially addressing current limitations of SACs in effectively furnishing transformations which involve synchronous proton-electron exchanges, substrate activation with reversible redox cycles, simultaneous multi-electron transfer, regulation of spin states, tuning of electronic properties, and cyclic transition states with low activation energies. This review aims to encapsulate the growing advancements in bimSACs, with an emphasis on their pivotal role in hydrogen generation via water splitting. We subsequently delve into advanced experimental methodologies for the elaborate characterization of SACs, elucidate their electronic properties, and discuss their local coordination environment. Overall, we present comprehensive discussion on the deployment of bimSACs in both hydrogen evolution reaction and oxygen evolution reaction, the two half-reactions of the water electrolysis process.
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Affiliation(s)
- Megha A Deshmukh
- Nanotechnology Centre, Centre for Energy and Environmental Technologies, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava-Poruba, Czech Republic
| | - Aristides Bakandritsos
- Nanotechnology Centre, Centre for Energy and Environmental Technologies, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava-Poruba, Czech Republic.
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 241/27, 783 71, Olomouc - Holice, Czech Republic.
| | - Radek Zbořil
- Nanotechnology Centre, Centre for Energy and Environmental Technologies, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava-Poruba, Czech Republic.
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 241/27, 783 71, Olomouc - Holice, Czech Republic.
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Liu Y, Ma X, Huang H, Deng G, Wang J, Chen X, Gao T. Ammonia-assisted Ni particle preferential deposition in Ni-Fe pyrophosphates on iron foam to improve the catalytic performance for overall water splitting. J Colloid Interface Sci 2024; 665:573-581. [PMID: 38552574 DOI: 10.1016/j.jcis.2024.03.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/16/2024] [Accepted: 03/24/2024] [Indexed: 04/17/2024]
Abstract
Designing efficient and cost-effective electrocatalysts for overall water splitting remains a major challenge in hydrogen production. Herein, ammonia was introduced to pyrophosphate chelating solution assisted Ni particles preferential plating on porous Fe substrate to form coral-like Ni/NiFe-Pyro electrode. The pyrophosphate with multiple complex sites can couple with nickel and iron ions to form an integrated network structure, which also consists of metallic nickel due to the introduction of ammonia. The large network structure in Ni/NiFe-Pyro significantly enhances the synergistic effect between nickel and iron and then improves the electrocatalytic performance. As a result, the coral-like Ni/NiFe-Pyro@IF exhibits good electrocatalytic activity and stability for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The electrolyzer assembled with Ni/NiFe-Pyro@IF as cathode and anode just needs a low water-splitting voltage of 1.54 V to obtain the current density of 10 mA cm-2. Meanwhile, the stability test of Ni/NiFe-Pyro@IF is performed at the current densities ranging from 10 to 400 mA cm-2 for 50 h without any significant decay, indicating robust catalytic stability for overall water splitting. This strategy for synthesizing metal/metal pyrophosphate composites may provide a new avenue for future studies of efficient bifunctional electrocatalysts.
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Affiliation(s)
- Yunhua Liu
- School of Chemical Engineering of Guizhou Institute of Technology, Guiyang, 550000, PR China
| | - Xianguo Ma
- School of Chemical Engineering of Guizhou Institute of Technology, Guiyang, 550000, PR China
| | - Hongsheng Huang
- School of Chemical Engineering of Guizhou Institute of Technology, Guiyang, 550000, PR China
| | - Guowei Deng
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, College of Chemistry and Life Science, Chengdu Normal University, Chengdu, 611130, PR China
| | - Jiexue Wang
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, College of Chemistry and Life Science, Chengdu Normal University, Chengdu, 611130, PR China
| | - Xiaojuan Chen
- School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China.
| | - Taotao Gao
- Institute for Advanced Study, Chengdu University, Chengdu, 610106, PR China.
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Ding L, Li K, Wang W, Xie Z, Yu S, Yu H, Cullen DA, Keane A, Ayers K, Capuano CB, Liu F, Gao PX, Zhang FY. Amorphous Iridium Oxide-Integrated Anode Electrodes with Ultrahigh Material Utilization for Hydrogen Production at Industrial Current Densities. NANO-MICRO LETTERS 2024; 16:203. [PMID: 38789605 PMCID: PMC11126398 DOI: 10.1007/s40820-024-01411-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/05/2024] [Indexed: 05/26/2024]
Abstract
Herein, ionomer-free amorphous iridium oxide (IrOx) thin electrodes are first developed as highly active anodes for proton exchange membrane electrolyzer cells (PEMECs) via low-cost, environmentally friendly, and easily scalable electrodeposition at room temperature. Combined with a Nafion 117 membrane, the IrOx-integrated electrode with an ultralow loading of 0.075 mg cm-2 delivers a high cell efficiency of about 90%, achieving more than 96% catalyst savings and 42-fold higher catalyst utilization compared to commercial catalyst-coated membrane (2 mg cm-2). Additionally, the IrOx electrode demonstrates superior performance, higher catalyst utilization and significantly simplified fabrication with easy scalability compared with the most previously reported anodes. Notably, the remarkable performance could be mainly due to the amorphous phase property, sufficient Ir3+ content, and rich surface hydroxide groups in catalysts. Overall, due to the high activity, high cell efficiency, an economical, greatly simplified and easily scalable fabrication process, and ultrahigh material utilization, the IrOx electrode shows great potential to be applied in industry and accelerates the commercialization of PEMECs and renewable energy evolution.
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Affiliation(s)
- Lei Ding
- Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Kui Li
- Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Weitian Wang
- Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Zhiqiang Xie
- Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Shule Yu
- Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Haoran Yu
- Oak Ridge National Lab, Center for Nanophase Materials Sciences, Oak Ridge, TN, 37831, USA
| | - David A Cullen
- Oak Ridge National Lab, Center for Nanophase Materials Sciences, Oak Ridge, TN, 37831, USA
| | - Alex Keane
- Nel Hydrogen, Wallingford, CT, 06492, USA
| | | | | | - Fangyuan Liu
- Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Pu-Xian Gao
- Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, 06269, USA
| | - Feng-Yuan Zhang
- Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA.
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Han Y, Chang M, Zhao Z, Niu F, Zhang Z, Sun Z, Zhang L, Hu K. Selective Valorization of Glycerol to Formic Acid on a BiVO 4 Photoanode through NiFe Phenolic Networks. ACS APPLIED MATERIALS & INTERFACES 2023; 15:11678-11690. [PMID: 36808942 DOI: 10.1021/acsami.2c20516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The integration of the glycerol oxidation reaction (GOR) with the hydrogen evolution reaction in photoelectrochemical (PEC) cells is a desirable alternative to PEC water splitting since a large quantity of glycerol is easily accessible as the byproduct from the biodiesel industry. However, the PEC valorization of glycerol to the value-added products suffers from low Faradaic efficiency and selectivity, especially in acidic conditions, which is beneficial for hydrogen production. Herein, by loading bismuth vanadate (BVO) with a robust catalyst composed of phenolic ligands (tannic acid) coordinated with Ni and Fe ions (TANF), we demonstrate a modified BVO/TANF photoanode for the GOR with a remarkable Faradaic efficiency of over 94% to value-added molecules in a 0.1 M Na2SO4/H2SO4 (pH = 2) electrolyte. The BVO/TANF photoanode achieved a high photocurrent of 5.26 mA·cm-2 at 1.23 V versus reversible hydrogen electrode under 100 mW/cm2 white light irradiation for formic acid production with 85% selectivity, equivalent to 573 mmol/(m2·h). Transient photocurrent and transient photovoltage techniques and electrochemical impedance spectroscopy along with intensity-modulated photocurrent spectroscopy indicated that the TANF catalyst could accelerate hole transfer kinetics and suppress charge recombination. Comprehensive mechanistic investigations reveal that the GOR is initiated by the photogenerated holes of BVO, while the high selectivity to formic acid is attributed to the selective adsorption of primary hydroxyl groups in glycerol on TANF. This study provides a promising avenue for highly efficient and selective formic acid generation from biomass in acid media via PEC cells.
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Affiliation(s)
- Yiming Han
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Mingwei Chang
- College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 201306, China
| | - Zijian Zhao
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Fushuang Niu
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Zhenghao Zhang
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Zehui Sun
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Liming Zhang
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Ke Hu
- Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
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