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Liu T, Chen C, Pu Z, Huang Q, Zhang X, Al-Enizi AM, Nafady A, Huang S, Chen D, Mu S. Non-Noble-Metal-Based Electrocatalysts for Acidic Oxygen Evolution Reaction: Recent Progress, Challenges, and Perspectives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2405399. [PMID: 39183523 DOI: 10.1002/smll.202405399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 08/14/2024] [Indexed: 08/27/2024]
Abstract
The oxygen evolution reaction (OER) plays a pivotal role in diverse renewable energy storage and conversion technologies, including water electrolysis, electrochemical CO2 reduction, nitrogen fixation, and metal-air batteries. Among various water electrolysis techniques, proton exchange membrane (PEM)-based water electrolysis devices offer numerous advantages, including high current densities, exceptional chemical stability, excellent proton conductivity, and high-purity H2. Nevertheless, the prohibitive cost associated with Ir/Ru-based OER electrocatalysts poses a significant barrier to the broad-scale application of PEM-based water splitting. Consequently, it is crucial to advance the development of non-noble metal OER catalysis substance with high acid-activity and stability, thereby fostering their widespread integration into PEM water electrolyzers (PEMWEs). In this review, a comprehensive analysis of the acidic OER mechanism, encompassing the adsorbate evolution mechanism (AEM), lattice oxygen mechanism (LOM) and oxide path mechanism (OPM) is offered. Subsequently, a systematic summary of recently reported noble-metal-free catalysts including transition metal-based, carbon-based and other types of catalysts is provided. Additionally, a comprehensive compilation of in situ/operando characterization techniques is provided, serving as invaluable tools for furnishing experimental evidence to comprehend the catalytic mechanism. Finally, the present challenges and future research directions concerning precious-metal-free acidic OER are comprehensively summarized and discussed in this review.
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Affiliation(s)
- Tingting Liu
- Fujian Key Laboratory of Polymer Materials, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Chen Chen
- Fujian Key Laboratory of Polymer Materials, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Zonghua Pu
- Fujian Key Laboratory of Polymer Materials, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Qiufeng Huang
- Fujian Key Laboratory of Polymer Materials, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Xiaofeng Zhang
- Fujian Key Laboratory of Polymer Materials, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, P. R. China
| | - Abdullah M Al-Enizi
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ayman Nafady
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Shengyun Huang
- Ganjiang Innovation Academy, Key Laboratory of Rare Earths, Chinese Academy of Sciences, Ganzhou, 341000, P. R. China
| | - Ding Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Shichun Mu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
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Zhao F, Cheng T, Lu X, Ghorai N, Yang Y, Geletii YV, Musaev DG, Hill CL, Lian T. Charge Transfer Mechanism on a Cobalt-Polyoxometalate-TiO 2 Photoanode for Water Oxidation in Acid. J Am Chem Soc 2024; 146:14600-14609. [PMID: 38748814 PMCID: PMC11140742 DOI: 10.1021/jacs.4c01441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/04/2024] [Accepted: 05/06/2024] [Indexed: 05/30/2024]
Abstract
We constructed a photoanode comprising the homogeneous water oxidation catalyst (WOC) Na8K8[Co9(H2O)6(OH)3(HPO4)2(PW9O34)3] (Co9POM) and nanoporous n-type TiO2 photoelectrodes (henceforth "TiO2-Co9POM") by first anchoring the cationic 3-aminopropyltrimethoxysilane (APS) ligand on a metal oxide light absorber, followed by treatment of the metal oxide-APS with a solution of the polyoxometalate WOC. The resulting TiO2-Co9POM photoelectrode exhibits a 3-fold oxygen evolution photocurrent enhancement compared to bare TiO2 in aqueous acidic conditions. Three-element (Co 2p, W 4f, and O 1s) X-ray photoelectron spectroscopy and Raman spectroscopy studies before and after use indicate that surface-bound Co9POM retains its structural integrity throughout all photoelectrochemical water oxidation studies reported here. Extensive charge-transfer mechanistic studies by photoelectrochemical techniques and transient absorption spectroscopy elucidate that Co9POM serves as an efficient WOC, extracting photogenerated holes from TiO2 on the picosecond time scale. This is the first comprehensive mechanistic investigation elucidating the roles of polyoxometalates in POM-photoelectrode hybrid oxygen evolution reaction systems.
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Affiliation(s)
- Fengyi Zhao
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Ting Cheng
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Xinlin Lu
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Nandan Ghorai
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Yiwei Yang
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Yurii V. Geletii
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Djamaladdin G. Musaev
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
- Cherry
L. Emerson Centre for Scientific Computation, Emory University, 1515
Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Tianquan Lian
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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3
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Yu H, Ke J, Shao Q. Two Dimensional Ir-Based Catalysts for Acidic OER. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2304307. [PMID: 37534380 DOI: 10.1002/smll.202304307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/20/2023] [Indexed: 08/04/2023]
Abstract
Electrochemical water splitting in acidic media is one of the most promising hydrogen production technologies, yet its practical applications in proton exchange membrane (PEM) water electrolyzers are limited by the anodic oxygen evolution reaction (OER). Iridium (Ir)-based materials are considered as the state-of-the-art catalysts for acidic OER due to their good stability under harsh acidic conditions. However, their activities still have much room for improvement. Two-dimensional (2D) materials are full of the advantages of high-surface area, unique electrical properties, facile surface modification, and good stability, making the development of 2D Ir-based catalysts more attractive for achieving high catalytic performance. In this review, first, the unique advantages of 2D catalysts for electrocatalysis are reviewed. Thereafter, the classification, synthesis methods, and recent OER achievements of 2D Ir-based materials, including pure metals, alloys, oxides, and perovskites are introduced. Finally, the prospects and challenges of developing 2D Ir-based catalysts for future acidic OER are discussed.
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Affiliation(s)
- Hao Yu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, Jiangsu, 215123, China
| | - Jia Ke
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Qi Shao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
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4
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Barros Á, Artetxe B, Eletxigerra U, Aranzabe E, Gutiérrez-Zorrilla JM. Systematic Approach to the Synthesis of Cobalt-Containing Polyoxometalates for Their Application as Energy Storage Materials. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5054. [PMID: 37512329 PMCID: PMC10384885 DOI: 10.3390/ma16145054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023]
Abstract
New energy storage materials are an object of study within the framework of the global energy transition. The development of renewable sources is being boosted thanks to stationary energy storage systems such as redox flow batteries (RFBs). This work reports the synthesis of the cobalt-containing Keggin-type polyoxometalates [CoW12O40]6- (CoW12) and [Co(H2O)SiW11O39]6- (CoSiW11), which have previously been shown to have applicability in RFBs. These procedures were reassessed to meet the strict requirements associated with the further implementation of RFBs, including fast and affordable synthetic procedures with high reaction yields. In contrast to the lengthy and complicated synthetic approaches published to date, the optimized synthesis reported in this work enables the isolation of the pure crystalline salt of the CoW12 anion with a 75% reduction of the time of the whole reaction procedure, eliminating tedious steps such as the recrystallization and including a 20% increased yield. The control of the stoichiometry, fine-tuning of reaction conditions, and the identification of intermediate species, as well as the acidic equilibria taking place during the process, were monitored via thermal, spectroscopic, and structural analyses. In the case of the CoSiW11 anion, its preparation was based on a simple and highly efficient procedure. Moreover, promising electrochemical properties were observed with the use of the one-pot synthetic approach, in which the stoichiometric amounts of the starting reagents are dissolved in the supporting electrolyte to be directly implemented as the electrolyte for a RFB.
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Affiliation(s)
- Ángela Barros
- Surface Chemistry and Nanotechnologies Unit, Tekniker, Iñaki Goenaga 5, 20600 Eibar, Spain
| | - Beñat Artetxe
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48080 Bilbao, Spain
| | - Unai Eletxigerra
- Surface Chemistry and Nanotechnologies Unit, Tekniker, Iñaki Goenaga 5, 20600 Eibar, Spain
| | - Estibaliz Aranzabe
- Surface Chemistry and Nanotechnologies Unit, Tekniker, Iñaki Goenaga 5, 20600 Eibar, Spain
| | - Juan M Gutiérrez-Zorrilla
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48080 Bilbao, Spain
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Ezhov R, Ravari AK, Palenik M, Loomis A, Meira DM, Savikhin S, Pushkar Y. Photoexcitation of Fe 3 O Nodes in MOF Drives Water Oxidation at pH=1 When Ru Catalyst Is Present. CHEMSUSCHEM 2023; 16:e202202124. [PMID: 36479638 DOI: 10.1002/cssc.202202124] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Artificial photosynthesis strives to convert the energy of sunlight into sustainable, eco-friendly solar fuels. However, systems with light-driven water oxidation reaction (WOR) at pH=1 are rare. Broadly used [Ru(bpy)3 ]2+ (bpy=2,2'-bipyridine) photosensitizer has a fixed +1.23 V potential which is insufficient to drive most water oxidation catalysts (WOCs) in acid, while Fe2 O3 , featuring the highly oxidizing holes, is not stable at low pH. Here, the key examples of Fe-based metal-organic framework (MOF) water oxidation photoelectrocatalysts active at pH=1 are presented. Fe-MIL-126 and Fe MOF-dcbpy structures were formed with 4,4'-biphenyl dicarboxylate (bpdc), 2,2'-bipyridine-5,5'-dicarboxylate (dcbpy) linkers and their mixtures. Presence of dcbpy linkers allows integration of metal-based catalysts via coordination to 2,2'-bipyridine fragments. Fe-based MOFs were doped with Ru-based precursors to achieve highly active MOFs bearing [Ru(bpy)(dcbpy)(H2 O)2 ]2+ WOC. Materials were analyzed with X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infra-red (FTIR) spectroscopy, resonance Raman, X-ray absorption spectroscopy, fs optical pump-probe, electron paramagnetic resonance (EPR), diffuse reflectance and electric conductivity measurements and were modeled by band structure calculations. It is shown that under reaction conditions, FeIII and RuIII oxidation states are present, indicating rate-limiting electron transfer in MOF. Fe3 O nodes emerge as photosensitizers able to drive prolonged O2 evolution in acid. Further developments are possible via MOF's linker modification for enhanced light absorption, electrical conductivity, reduced MOF solubility in acid, Ru-WOC modification for faster WOC catalysis, or Ru-WOC substitution to 3d metal-based systems. The findings give further insight for development of light-driven water splitting systems based on Earth-abundant metals.
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Affiliation(s)
- Roman Ezhov
- Department of Physics and Astronomy, Purdue University, West Lafayette, 47907, USA
| | - Alireza K Ravari
- Department of Physics and Astronomy, Purdue University, West Lafayette, 47907, USA
| | - Mark Palenik
- US Naval Research Laboratory, Washington, 20375, USA
| | - Alexander Loomis
- Department of Physics and Astronomy, Purdue University, West Lafayette, 47907, USA
| | | | - Sergei Savikhin
- Department of Physics and Astronomy, Purdue University, West Lafayette, 47907, USA
| | - Yulia Pushkar
- Department of Physics and Astronomy, Purdue University, West Lafayette, 47907, USA
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Mallick L, Chakraborty B. Ionic γ-FeO(OH) Nanocrystal Stabilized by Small Isopolymolybdate Clusters as Reactive Core for Water Oxidation. Chemistry 2023; 29:e202203033. [PMID: 36310518 DOI: 10.1002/chem.202203033] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 12/13/2022]
Abstract
At near neutral to basic pH, hydrolysis-induced aggregation to insoluble bulk iron-oxide is often regarded as the pitfalls of molecular iron clusters. Iron-oxide nanocrystals are encouragingly active over the molecular clusters and/or bulk oxides albeit, stabilizing such nanostructures in aqueous pH and under turnover condition remain a perdurable challenge. Herein, an Anderson-type [Mo7 O24 ]6- isopolyanion, a small (dimension ca. 0.85 nm) isolable polyoxometalate (POM) possessing only {31} atoms, has been introduced for the first time as a covalent linker to stabilize an infinitely stable and aqueous-soluble γ-FeO(OH) nanocore. During the hydrothermal isolation of the material, a partial dissociation of the parent [Mo7 O24 ]6- may lead to the in situ generation of few analogous [Mox Oy ]n- clusters, proved by Raman study, which can also participate in stabilizing the γ-FeO(OH) nanocore, Mox Oy @FeO(OH). However, due to high ionic charge on {Mo=O} terminals of the [Mox Oy ]n- , they are covalently linked via MoVI -μ2 O-FeIII bridging to γ-FeO(OH) core in Mox Oy @FeO(OH), established by numerous spectroscopic and microscopic evidence. Such bonding mode is more likely as precedent from the coordination motif documented in the transition metal clusters stabilized by this POM. The γ-FeO(OH) nanocore of Mox Oy @FeO(OH) behaves as potent active center for electrochemical water oxidation with a overpotential, 263 mV @ 10 mA cm-2 , lower than that observed for bare γ-FeO(OH). Despite of some molybdenum dissolution from the POM ligands to the electrolyte, residual anionic POM fragments covalently bound to the OER active γ-FeO(OH) core of the Mox Oy @FeO(OH) makes the surface predominantly ionic that results in an ordered electrical double layer to promote a better charge transport across the electrode-electrolyte junction, less likely in bulk γ-FeO(OH).
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Affiliation(s)
- Laxmikanta Mallick
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, India
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7
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Surface Reconstruction of Cobalt-Based Polyoxometalate and CNT Fiber Composite for Efficient Oxygen Evolution Reaction. Catalysts 2022. [DOI: 10.3390/catal12101242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Polyoxometalates (POMs), as carbon-free metal-oxo-clusters with unique structural properties, are emerging water-splitting electrocatalysts. Herein, we explore the development of cobalt-containing polyoxometalate immobilized over the carbon nanotube fiber (CNTF) (Co4POM@CNTF) towards efficient electrochemical oxygen evolution reaction (OER). CNTF serves as an excellent electron mediator and highly conductive support, while the self-activation of the part of Co4POM through restructuring in basic media generates cobalt oxides and/or hydroxides that serve as catalytic sites for OER. A modified electrode fabricated through the drop-casting method followed by thermal treatment showed higher OER activity and enhanced stability in alkaline media. Furthermore, advanced physical characterization and electrochemical results demonstrate efficient charge transfer kinetics and high OER performance in terms of low overpotential, small Tafel slope, and good stability over an extended reaction time. The significantly high activity and stability achieved can be ascribed to the efficient electron transfer and highly electrochemically active surface area (ECSA) of the self-activated electrocatalyst immobilized over the highly conductive CNTF. This research is expected to pave the way for developing POM-based electrocatalysts for oxygen electrocatalysis.
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8
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Sustainable oxygen evolution electrocatalysis in aqueous 1 M H 2SO 4 with earth abundant nanostructured Co 3O 4. Nat Commun 2022; 13:4341. [PMID: 35896541 PMCID: PMC9329283 DOI: 10.1038/s41467-022-32024-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 07/13/2022] [Indexed: 11/08/2022] Open
Abstract
Earth-abundant electrocatalysts for the oxygen evolution reaction (OER) able to work in acidic working conditions are elusive. While many first-row transition metal oxides are competitive in alkaline media, most of them just dissolve or become inactive at high proton concentrations where hydrogen evolution is preferred. Only noble-metal catalysts, such as IrO2, are fast and stable enough in acidic media. Herein, we report the excellent activity and long-term stability of Co3O4-based anodes in 1 M H2SO4 (pH 0.1) when processed in a partially hydrophobic carbon-based protecting matrix. These Co3O4@C composites reliably drive O2 evolution a 10 mA cm-2 current density for >40 h without appearance of performance fatigue, successfully passing benchmarking protocols without incorporating noble metals. Our strategy opens an alternative venue towards fast, energy efficient acid-media water oxidation electrodes.
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9
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Weber P, Weber DJ, Dosche C, Oezaslan M. Highly Durable Pt-Based Core–Shell Catalysts with Metallic and Oxidized Co Species for Boosting the Oxygen Reduction Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00514] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philipp Weber
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
- Technical Electrocatalysis Laboratory, Institute of Technical Chemistry, Technical University of Braunschweig, Braunschweig 38106, Germany
| | - Daniel J. Weber
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
- Technical Electrocatalysis Laboratory, Institute of Technical Chemistry, Technical University of Braunschweig, Braunschweig 38106, Germany
| | - Carsten Dosche
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
| | - Mehtap Oezaslan
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Oldenburg 26129, Germany
- Technical Electrocatalysis Laboratory, Institute of Technical Chemistry, Technical University of Braunschweig, Braunschweig 38106, Germany
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10
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Tao M, Yin Q, Kaledin AL, Uhlikova N, Lu X, Cheng T, Chen YS, Lian T, Geletii YV, Musaev DG, Bacsa J, Hill CL. Structurally Precise Two-Transition-Metal Water Oxidation Catalysts: Quantifying Adjacent 3d Metals by Synchrotron X-Radiation Anomalous Dispersion Scattering. Inorg Chem 2022; 61:6252-6262. [PMID: 35416667 DOI: 10.1021/acs.inorgchem.2c00446] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mixed 3d metal oxides are some of the most promising water oxidation catalysts (WOCs), but it is very difficult to know the locations and percent occupancies of different 3d metals in these heterogeneous catalysts. Without such information, it is hard to quantify catalysis, stability, and other properties of the WOC as a function of the catalyst active site structure. This study combines the site selective synthesis of a homogeneous WOC with two adjacent 3d metals, [Co2Ni2(PW9O34)2]10- (Co2Ni2P2) as a tractable molecular model for CoNi oxide, with the use of multiwavelength synchrotron X-radiation anomalous dispersion scattering (synchrotron XRAS) that quantifies both the location and percent occupancy of Co (∼97% outer-central-belt positions only) and Ni (∼97% inner-central-belt positions only) in Co2Ni2P2. This mixed-3d-metal complex catalyzes water oxidation an order of magnitude faster than its isostructural analogue, [Co4(PW9O34)2]10- (Co4P2). Four independent and complementary lines of evidence confirm that Co2Ni2P2 and Co4P2 are the principal WOCs and that Co2+(aq) is not. Density functional theory (DFT) studies revealed that Co4P2 and Co2Ni2P2 have similar frontier orbitals, while stopped-flow kinetic studies and DFT calculations indicate that water oxidation by both complexes follows analogous multistep mechanisms, including likely Co-OOH formation, with the energetics of most steps being lower for Co2Ni2P2 than for Co4P2. Synchrotron XRAS should be generally applicable to active-site-structure-reactivity studies of multi-metal heterogeneous and homogeneous catalysts.
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Affiliation(s)
- Meilin Tao
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Qiushi Yin
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Alexey L Kaledin
- Emerson Center for Scientific Computation, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Natalie Uhlikova
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Xinlin Lu
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Ting Cheng
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Yu-Sheng Chen
- ChemMatCARS/The University of Chicago, 9700 S. Cass Ave, Lemont, Illinois 60439, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Yurii V Geletii
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States.,Emerson Center for Scientific Computation, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - John Bacsa
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
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11
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Cobalt Phosphotungstate-Based Composites as Bifunctional
Electrocatalysts for Oxygen Reactions. Catalysts 2022. [DOI: 10.3390/catal12040357] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are key reactions in energy-converting systems, such as fuel cells (FCs) and water-splitting (WS) devices. However, the current use of expensive Pt-based electrocatalysts for ORR and IrO2 and RuO2 for OER is still a major drawback for the economic viability of these clean energy technologies. Thus, there is an incessant search for low-cost and efficient electrocatalysts (ECs). Hence, herein, we report the preparation, characterization (Raman, XPS, and SEM), and application of four composites based on doped-carbon materials (CM) and cobalt phosphotungstate (MWCNT_N8_Co4, GF_N8_Co4, GF_ND8_Co4, and GF_NS8_Co4) as ORR and OER electrocatalysts in alkaline medium (pH = 13). Structural characterization confirmed the successful carbon materials doping with N and/or N, S, and the incorporation of the cobalt phosphotungstate. Overall, all composites showed good ORR performance with onset potentials ranging from 0.83 to 0.85 V vs. RHE, excellent tolerance to methanol crossover with current retentions between 88 and 90%, and good stability after 20,000 s at E = 0.55 V vs. RHE (73% to 82% of initial current). In addition, the number of electrons transferred per O2 molecule was close to four, suggesting selectivity to the direct process. Moreover, these composites also presented excellent OER performance with GF_N8_Co4 showing an overpotential of 0.34 V vs. RHE (for j = 10 mA cm−2) and jmax close to 70 mA cm−2. More importantly, this electrocatalyst outperformed state-of-the-art IrO2 electrocatalyst. Thus, this work represents a step forward toward bifunctional electrocatalysts using less expensive materials.
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12
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Hou Y, Lv J, Quan W, Lin Y, Hong Z, Huang Y. Strategies for Electrochemically Sustainable H 2 Production in Acid. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104916. [PMID: 35018743 PMCID: PMC8895139 DOI: 10.1002/advs.202104916] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/23/2021] [Indexed: 06/14/2023]
Abstract
Acidified water electrolysis with fast kinetics is widely regarded as a promising option for producing H2 . The main challenge of this technique is the difficulty in realizing sustainable H2 production (SHP) because of the poor stability of most electrode catalysts, especially on the anode side, under strongly acidic and highly polarized electrochemical environments, which leads to surface corrosion and performance degradation. Research efforts focused on tuning the atomic/nano structures of catalysts have been made to address this stability issue, with only limited effectiveness because of inevitable catalyst degradation. A systems approach considering reaction types and system configurations/operations may provide innovative viewpoints and strategies for SHP, although these aspects have been overlooked thus far. This review provides an overview of acidified water electrolysis for systematic investigations of these aspects to achieve SHP. First, the fundamental principles of SHP are discussed. Then, recent advances on design of stable electrode materials are examined, and several new strategies for SHP are proposed, including fabrication of symmetrical heterogeneous electrolysis system and fluid homogeneous electrolysis system, as well as decoupling/hybrid-governed sustainability. Finally, remaining challenges and corresponding opportunities are outlined to stimulate endeavors toward the development of advanced acidified water electrolysis techniques for SHP.
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Affiliation(s)
- Yuxi Hou
- Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and EnergyFujian Normal UniversityFuzhou350117China
- Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy StorageFuzhou350117China
- Fujian Provincial Collaborative Innovation Center for Advanced High‐Field Superconducting Materials and EngineeringFuzhou350117China
| | - Jiangquan Lv
- College of Electronics and Information Science & Organic Optoelectronics Engineering Research Center of Fujian's UniversitiesFujian Jiangxia UniversityFuzhouFujian350108P. R. China
| | - Weiwei Quan
- Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and EnergyFujian Normal UniversityFuzhou350117China
- Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy StorageFuzhou350117China
- Fujian Provincial Collaborative Innovation Center for Advanced High‐Field Superconducting Materials and EngineeringFuzhou350117China
| | - Yingbin Lin
- Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and EnergyFujian Normal UniversityFuzhou350117China
- Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy StorageFuzhou350117China
| | - Zhensheng Hong
- Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and EnergyFujian Normal UniversityFuzhou350117China
- Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy StorageFuzhou350117China
| | - Yiyin Huang
- Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and EnergyFujian Normal UniversityFuzhou350117China
- Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy StorageFuzhou350117China
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13
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Shimoyama Y, Ogiwara N, Weng Z, Uchida S. Oxygen Evolution Reaction Driven by Charge Transfer from a Cr Complex to Co-Containing Polyoxometalate in a Porous Ionic Crystal. J Am Chem Soc 2022; 144:2980-2986. [PMID: 35040654 DOI: 10.1021/jacs.1c10471] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Considerable efforts have been devoted to developing oxygen evolution reaction (OER) catalysts based on transition metal oxides. Polyoxometalates (POMs) can be regarded as model compounds of transition metal oxides, and cobalt-containing POMs (Co-POMs) have received significant interest as candidates. Nanocomposites based on Co-POMs have been reported to show high OER activities due to synergistic effects among the components; however, the role of each component is unclear due to its complex structure. Herein, we utilize porous ionic crystals (PICs) based on Co-POMs, which enable a composition-structure-function relationship to be established to understand the origin of the synergistic catalysis. Specifically, a Keggin-type POM [α-CoW12O40]6- and a Cr complex [Cr3O(OOCCH2CN)6(H2O)3]+ are implemented as PIC building blocks for the OER under nonbasic conditions. The potentially OER-active but highly soluble [α-CoW12O40]6- was successfully anchored in the crystalline PIC matrix via Coulomb interactions and hydrogen bonding induced by polar cyano groups of the Cr complex. The PIC exhibits efficient and sustained OER catalytic activity, while each building block is inactive. The Tafel slope of the linear sweep voltammetry curve and the relatively large kinetic isotope effect value suggest that elementary steps closely related to the OER rate involve single-electron and proton transfer reactions. Electrochemical and spectroscopic studies clearly show that the synergistic catalysis originates from the charge transfer from the Cr complex to [α-CoW12O40]6-; the increased electron density of [α-CoW12O40]6- may increase its basicity and accelerate proton abstraction as well as enhance electron transfer to stabilize the reaction intermediates adsorbed on [α-CoW12O40]6-.
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Affiliation(s)
- Yuto Shimoyama
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Naoki Ogiwara
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Zhewei Weng
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Sayaka Uchida
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
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14
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Xu W, Wu X, Yuan Y, Qin Y, Liu Y, Wang Z, Zhang D, Li H, Lai J, Wang L. Multiphase PdCu nanoparticles with improved C1 selectivity in ethanol oxidation. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00869f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PdCu/CNT-300 catalysts with a mixed crystalline phase were successfully prepared. The introduction of Cu elements and the presence of a phase interface in the mixed phase facilitated electron transfer and increased the rate of the EOR.
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Affiliation(s)
- Wenxia Xu
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Xueke Wu
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Yueyue Yuan
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Yingnan Qin
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Yanru Liu
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Zuochao Wang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Dan Zhang
- Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Hongdong Li
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Jianping Lai
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Lei Wang
- State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
- Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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15
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Azmani K, Besora M, Soriano-López J, Landolsi M, Teillout AL, de Oliveira P, Mbomekallé IM, Poblet JM, Galán-Mascarós JR. Understanding polyoxometalates as water oxidation catalysts through iron vs. cobalt reactivity. Chem Sci 2021; 12:8755-8766. [PMID: 34257875 PMCID: PMC8246111 DOI: 10.1039/d1sc01016f] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/13/2021] [Indexed: 01/08/2023] Open
Abstract
Cobalt polyoxometalates (Co-POMs) have emerged as promising water oxidation catalysts (WOCs), with the added advantage of their molecular nature despite being metal oxide fragments. In comparison with metal oxides, that do not offer well-defined active surfaces, POMs have a controlled, discrete structure that allows for precise correlations between experiment and computational analyses. Thus, beyond highly active WOCs, POMs are also model systems to gain deeper mechanistic understanding on the oxygen evolution reaction (OER). The tetracobalt Weakley sandwich [CoII 4(H2O)2(B-α-PW9O34)2]10- (Co4-WS) has been one of the most extensively studied. We have compared its activity with that of the iron analog [FeIII 4(H2O)2(B-α-PW9O34)2]6- (Fe4-WS) looking for the electronic effects determining their activity. Furthermore, the effect of POM nuclearity was also investigated by comparison with the iron- and cobalt-monosubstituted Keggin clusters. Electrocatalytic experiments employing solid state electrodes containing the POMs and the corresponding computational calculations demonstrate that CoII-POMs display better WOC activity than the FeIII derivatives. Moreover, the activity of POMs is less influenced by their nuclearity, thus Weakley sandwich moieties show slightly improved WOC characteristics than Keggin clusters. In good agreement with the experimental data, computational methods, including pK a values, confirm that the resting state for Fe-POMs in neutral media corresponds to the S1 (FeIII-OH) species. Overall, the proposed reaction mechanism for Fe4-WS is analogous to that found for Co4-WS, despite their electronic differences. The potential limiting step is a proton-coupled electron transfer event yielding the active S2 (FeIV[double bond, length as m-dash]O) species, which receives a water nucleophilic attack to form the O-O bond. The latter has activation energies slightly higher than those computed for the Co-POMs, in good agreement with experimental observations. These results provide new insights for the accurate understanding of the structure-reactivity relationships of polyoxometalates in particular, and or metal oxides in general, which are of utmost importance for the development of new bottom-up synthetic approaches to design efficient, robust and non-expensive earth-abundant water oxidation catalysts.
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Affiliation(s)
- Khalid Azmani
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans, 16 Tarragona E-43007 Spain
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili Marcel·lí Domingo 1 E-43007 Tarragona Spain
| | - Maria Besora
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili Marcel·lí Domingo 1 E-43007 Tarragona Spain
| | - Joaquín Soriano-López
- School of Chemistry & AMBER Center, Trinity College, University of Dublin Dublin D02 PN40 Ireland
| | - Meriem Landolsi
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili Marcel·lí Domingo 1 E-43007 Tarragona Spain
| | - Anne-Lucie Teillout
- Equipe d'Electrochimie et de Photo-électrochimie, Institut de Chimie Physique, UMR 8000, CNRS, Université Paris Saclay Orsay F-91405 France
| | - Pedro de Oliveira
- Equipe d'Electrochimie et de Photo-électrochimie, Institut de Chimie Physique, UMR 8000, CNRS, Université Paris Saclay Orsay F-91405 France
| | - Israël-Martyr Mbomekallé
- Equipe d'Electrochimie et de Photo-électrochimie, Institut de Chimie Physique, UMR 8000, CNRS, Université Paris Saclay Orsay F-91405 France
| | - Josep M Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili Marcel·lí Domingo 1 E-43007 Tarragona Spain
| | - José-Ramón Galán-Mascarós
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST) Av. Països Catalans, 16 Tarragona E-43007 Spain
- ICREA, Pg. Lluís Companys 23 08010 Barcelona Spain
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16
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Peng X, Jin X, Gao B, Liu Z, Chu PK. Strategies to improve cobalt-based electrocatalysts for electrochemical water splitting. J Catal 2021. [DOI: 10.1016/j.jcat.2021.04.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Craig MJ, Barda-Chatain R, García-Melchor M. Fundamental insights and rational design of low-cost polyoxometalates for the oxygen evolution reaction. J Catal 2021. [DOI: 10.1016/j.jcat.2020.11.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Zhang L, Chen W, Wang T, Li Y, Ma C, Zheng Y, Gong J. Polyoxometalate modified transparent metal selenide counter electrodes for high-efficiency bifacial dye-sensitized solar cells. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00447f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a facile one-step hydrothermal approach for the growth of PW11Co/Co0.85Se on a conductive glass substrate, which could be used as transparent CE in bifacial DSSCs with enhanced front and back efficiencies of 7.56% and 5.82%, respectively.
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Affiliation(s)
- Lu Zhang
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Weichao Chen
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Ting Wang
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Yunjiang Li
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Chunhui Ma
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Yuxiao Zheng
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
| | - Jian Gong
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education
- Department of Chemistry
- Northeast Normal University
- Changchun
- China
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