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Wang J, Wang L, Wu R, Fan C, Zhang X, Fan Y. Robust High-performance Bifunctional Porous Cobalt MOF-Based Catalysts for Overall Water Splitting. Inorg Chem 2024; 63:11542-11553. [PMID: 38860865 DOI: 10.1021/acs.inorgchem.4c00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
MOF-based materials, as bifunctional catalysts for electrocatalytic water splitting, play an important role in the application and development of clean fuel hydrogen energy. This study presents a series of novel 3D Co-based MOFs with layered networks, including [Co(4,4'-bipy)0.5(aip)(CH3OH)·H2O]n (Co-MOF 1), [Co2(1,3'-bit)(aip)2(CH3OH)·H2O]n (Co-MOF 2), [Co(4,4'-bipb)(aip)]n (Co-MOF 3), and [Co2(4,4'-bipe)(aip)2·1.5H2O]n (Co-MOF 4). Their single-crystal structures of Co-MOFs 1-4 are characterized and analyzed before being applied in alkaline solutions for water decomposition (OER and HER). The electrocatalytic tests indicate that Co-MOFs 1-4 exhibit a good performance. Notably, Co-MOF 4 exhibits great behavior which has low overpotentials of 94 and 188 mV (OER) as well as 185 and 352 mV (HER) at the currents of 10 and 100 mA cm-2, respectively. In comparison with Co-MOFs 1-3, Co-MOF 4 has the lowest Tafel slopes, highest ECSA, and smallest resistance. The immanent qualities, such as distinct interwoven long chain layered structure, unsaturated coordination modes, and synergistic catalytic qualities among Co ions, contribute to explaining the results. The fundamentals provide valuable information for the investigation of innovative MOF-based bifunctional electrocatalysts for overall water splitting.
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Affiliation(s)
- Jinmiao Wang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong 266100, P. R. China
| | - Lulu Wang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong 266100, P. R. China
| | - Ruixue Wu
- College of Food Engineering, Qingdao Institute of Technology, Qingdao, Shandong 266300, P. R. China
| | - Chuanbin Fan
- Key Laboratory of Research on Environment and Population Health in Aluminum Mining Areas, Education Department of Guangxi Zhuang Autonomous Region, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, P. R. China
| | - Xia Zhang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong 266100, P. R. China
| | - Yuhua Fan
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong 266100, P. R. China
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Said A, Chen G, Zhang G, Wang D, Liu Y, Gao F, Wang G, Tung CH, Wang Y. Enhancing the photocatalytic performance of a rutile unit featuring a titanium-oxide cluster by Pb 2+ doping. Dalton Trans 2024; 53:3666-3674. [PMID: 38293811 DOI: 10.1039/d3dt03865c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Titanium-oxide clusters (TOCs) are well-defined molecular models for TiO2 materials and provide the opportunity to study the structure-activity relationships of TiO2. Here, we report a new Pb-doped TOC, Ti12Pb2, which resembles a two-layer decker of the {TiTi6} structural units of rutile TiO2 with two Ti4+ ions replaced by two Pb2+ ions. Its electronic structure, photoresponse, and photocatalytic performances were investigated and compared with those of the Ti14 cluster, which is isostructural to Ti12Pb2. Our results indicate that Pb2+ does not affect the electronic structure, but it greatly enhances the photocatalytic activity by improving the charge-separation and interfacial charge-transfer properties of the TOC. The successful synthesis of Ti12Pb2 highlights the roles of closed-shell heterometal ions in the construction of new TOCs. Our mechanism may be an inspiration for understanding the structure-activity relationships of closed-shell heterometal-doped TiO2.
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Affiliation(s)
- Amir Said
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Guanjie Chen
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Guanyun Zhang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Dexin Wang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yanshu Liu
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Fangfang Gao
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Guo Wang
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Chen-Ho Tung
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yifeng Wang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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Han EM, Meng RX, Tian YQ, Yan J, Liu KY, Liu C. Al12Co4: a pioneering heterometallic aluminum oxo cluster with surface-exposed Co sites for the oxygen evolution reaction. Chem Commun (Camb) 2023; 59:11097-11100. [PMID: 37642513 DOI: 10.1039/d3cc03672c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
We report an unprecedented heterometallic aluminum oxo cluster (AlOC) containing four surface-exposed CoII sites, designated as Al12Co4, protected by four t-butylcalix[4]arene (TBC[4]) molecules. The Al12Co4 nanocluster represents a significant advancement on multiple innovative fronts. First, it stands as an pioneering example of an AlIII-based metallocalixarene nanocluster. It is also the first instance of heterometallic AlOCs shielded by macrocyclic ligands. Notably, this cluster also holds the distinction of being the highest nuclearity Al-Co bimetallic nanocluster known to date. Additionally, by depositing Al12Co4 on carbon nanotubes (CNTs) as a supported catalyst, we investigated its electrocatalytic performance for the oxygen evolution reaction in alkaline media. To reach a 10 mA cm-2 current density in alkaline solution, the Al12Co4@CNT electrode needs overpotential as low as 320 mV.
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Affiliation(s)
- Er-Meng Han
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, P. R. China.
| | - Ru-Xin Meng
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, P. R. China.
| | - Yi-Qi Tian
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, P. R. China.
| | - Jun Yan
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, P. R. China.
| | - Kai-Yu Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, P. R. China.
| | - Chao Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, P. R. China.
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Wang Q, Li T, Yan S, Zhang W, Lv G, Xu H, Li H, Wang Y, Liu J. Boosting Hydrogen Production by Selective Anodic Electrooxidation of Ethanol over Trimetallic PdSbBi Nanoparticles: Composition Matters. Inorg Chem 2022; 61:16211-16219. [PMID: 36150124 DOI: 10.1021/acs.inorgchem.2c02888] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The conventional hydrogen evolution from water electrolysis is severely impeded by the sluggish kinetics of oxygen evolution reaction (OER). In this work, an integrated electrolysis system of replacing the anodic OER with a thermodynamically favorable ethanol oxidation reaction (EOR) has been developed by using PdSbBi/C as an electrocatalyst. To maximize the EOR performance, the composition of PdSbBi nanoparticles is tuned by varying the ratio of Sb and Bi precursors. Ternary PdSbBi-based electrocatalysts exhibit enhanced activity and stability toward EOR compared to commercial Pd/C and binary catalysts. In particular, the Pd76Sb17Bi7/C catalyst delivers a very high specific activity up to 52.4 mA cm-2 and mass activity of 2.66 A mg-1Pd. Besides, this EOR process is demonstrated to have high selectivity with acetic acid as the oxidation product in the electrolyte. When coupled with a cathodic platinum mash, the two-electrode electrolyzer cell requires a voltage input of merely 0.61 V to afford a current density of 10 mA cm-2. Density functional theory calculations reveal that the presence of Sb and Bi can promote the adsorption of hydroxide ions and facilitate the removal of reaction intermediates in the EOR pathway. This work provides a novel catalyst for the energy-efficient coproduction of acetic acid and hydrogen fuel.
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Affiliation(s)
- Qiuxia Wang
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Tong Li
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Suxia Yan
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Wenjie Zhang
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Guoai Lv
- Yangzhou China-Power Hydrogen Equipment Co., Ltd., Yangzhou, Jiangsu 225000, China
| | - Hui Xu
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Huaming Li
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Yong Wang
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Junfeng Liu
- Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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Akhtar MN, Bikas R, AlDamen MA, Shaghaghi Z, Shahid M, Sokolov A. A new hexanuclear Fe(III) nanocluster: Synthesis, structure, magnetic properties, and efficient activity as a precatalyst in water oxidation. Dalton Trans 2022; 51:12686-12697. [DOI: 10.1039/d2dt01822e] [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
The oxo-bridged hexanuclear iron cluster formulated, [Fe6III(µ4-O)2(edteH)2(piv)4(SCN)4]∙2MeCN∙2H2O (1) (where, edteH = N,N,N′,N′-tetrakis(2-hydroxyethyl)ethylenediamine; piv = pivalic acid) is synthesized by the reaction of FeCl2∙4H2O with edteH4 and piv in the presence...
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