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Ji M, Yaseen W, Mao H, Xia C, Xu Y, Meng S, Xie J, Xie M. Synergistically Coupled Ni/CeO x@C Electrocatalysts for the Hydrogen Evolution Reaction: Remarkable Performance to Pt/C at High Current Density. Inorg Chem 2023. [PMID: 37498974 DOI: 10.1021/acs.inorgchem.3c01587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Incredibly active electrocatalysts comprising earth-abundant materials that operate as effectively as noble metal catalysts are essential for the sustainable generation of hydrogen through water splitting. However, the vast majority of active catalysts are produced via complicated synthetic processes, making scale-up considerably tricky. In this work, a facile strategy is developed to synthesize superhydrophilic Ni/CeOx nanoparticles (NPs) integrated into porous carbon (Ni/CeOx@C) by a simple two-step synthesis strategy as efficient hydrogen evolution reaction (HER) electrocatalysts in 1.0 M KOH. Benefiting from the electron transport induced by the heterogeneous interface between Ni and CeOx NPs and the superhydrophilic structure of the catalyst, the resultant Ni2Ce1@C/500 catalysts exhibit a low overpotential of 26 and 184 mV at a current density of 10 and 300 mA cm-2, respectively, for HER with a small Tafel slope of 62.03 mV dec-1 and robust durability over 300 h, and its overpotential at a high current density is much better than the benchmark commercial Pt/C. Results revealed that the electronic rearrangement between Ni and CeOx integrated into porous carbon could effectively regulate the local conductivity and charge density. In addition, the oxygen vacancies and Ni/CeOx heterointerface promote water adsorption and hydrogen intermediate dissociation into H2 molecules, which ultimately accelerate the HER reaction kinetics. Notably, the electrochemical results demonstrate that structural optimization by regulating synthesis temperature and metal concentration could improve the surface features contributing to high electrical conductivity and increase the number of electrochemically active sites on the Ni/CeOx@C heterointerface, high crystal purity, and better electrical conductivity, resulting in its exceptional electrocatalytic performance toward the HER. These results indicated that the Ni/CeOx@C electrocatalyst has the potential for practical water-splitting applications because of its controlled production strategy and outstanding Pt-like HER performance.
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Affiliation(s)
- Mengyi Ji
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Waleed Yaseen
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Huiping Mao
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Changkun Xia
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yuanguo Xu
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Suci Meng
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Jimin Xie
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Meng Xie
- School of Chemistry and Chemical Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P. R. China
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Lu M, Zheng Y, Hu Y, Huang B, Ji D, Sun M, Li J, Peng Y, Si R, Xi P, Yan CH. Artificially steering electrocatalytic oxygen evolution reaction mechanism by regulating oxygen defect contents in perovskites. SCIENCE ADVANCES 2022; 8:eabq3563. [PMID: 35905191 PMCID: PMC9337758 DOI: 10.1126/sciadv.abq3563] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The regulation of mechanism on the electrocatalysis process with multiple reaction pathways is more efficient and essential than conventional material engineering for the enhancement of catalyst performance. Here, by using oxygen evolution reaction (OER) as a model, which has an adsorbate evolution mechanism (AEM) and a lattice oxygen oxidation mechanism (LOM), we demonstrate a general strategy for steering the two mechanisms on various LaxSr1-xCoO3-δ. By delicately controlling the oxygen defect contents, the dominant OER mechanism on LaxSr1-xCoO3-δ can be arbitrarily transformed between AEM-LOM-AEM accompanied by a volcano-type activity variation trend. Experimental and computational evidence explicitly reveal that the phenomenon is due to the fact that the increased oxygen defects alter the lattice oxygen activity with a volcano-type trend and preserve the Co0 state for preferably OER. Therefore, we achieve the co-optimization between the activity and stability of catalysts by altering the mechanism rather than a specific design of catalysts.
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Affiliation(s)
- Min Lu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yao Zheng
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Yang Hu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Bolong Huang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
- Corresponding author. (B.H.); (P.X.)
| | - Deguang Ji
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Mingzi Sun
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Jianyi Li
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yong Peng
- School of Materials and Energy, Electron Microscopy Centre of Lanzhou University, Lanzhou 730000, China
| | - Rui Si
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
| | - Pinxian Xi
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- Corresponding author. (B.H.); (P.X.)
| | - Chun-Hua Yan
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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Song Y, Zhang X, Zhang Y, Zhai P, Li Z, Jin D, Cao J, Wang C, Zhang B, Gao J, Sun L, Hou J. Engineering MoO x /MXene Hole Transfer Layers for Unexpected Boosting of Photoelectrochemical Water Oxidation. Angew Chem Int Ed Engl 2022; 61:e202200946. [PMID: 35142021 DOI: 10.1002/anie.202200946] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Indexed: 12/20/2022]
Abstract
The development of semiconductor photoanodes is of great practical interest for the realization of photoelectrochemical (PEC) water splitting. Herein, MXene quantum dots (MQD) were grafted on a BiVO4 substrate, then a MoOx layer by combining an ultrathin oxyhydroxide oxygen evolution cocatalyst (OEC) was constructed as an integrated photoanode. The OEC/MoOx /MQD/BiVO4 array not only achieves a current density of 5.85 mA cm-2 at 1.23 V versus a reversible hydrogen electrode (vs. RHE), but also enhances photostability. From electrochemical analysis and density functional theory calculations, high PEC performance is ascribed to the incorporation of MoOx /MQD as hole transfer layers, retarding charge recombination, promoting hole transfer and accelerating water splitting kinetics. This proof-of-principle work not only demonstrates the potential utilization of hole transfer layers, but also sheds light on rational design and fabrication of integrated photoanodes for feasible solar energy conversion.
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Affiliation(s)
- Yurou Song
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Xiaomeng Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Yanxue Zhang
- Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Panlong Zhai
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Zhuwei Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Dingfeng Jin
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Jiaqi Cao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Chen Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Bo Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Junfeng Gao
- Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
| | - Licheng Sun
- Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University, Hangzhou, 310024, P. R. China.,School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Jungang Hou
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian, 116024, P. R. China
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Hou J, Song Y, Zhang X, Zhang Y, Zhai P, Li Z, Jin D, Cao J, Wang C, Zhang B, Gao J, Sun L. Engineering MoOx/MXene Hole Transfer Layers for Unexpected Boosting Photoelectrochemical Water Oxidation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jungang Hou
- Dalian University of Technology No 2 Longong Road CHINA
| | - Yurou Song
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Xiaomeng Zhang
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Yanxue Zhang
- Dalian University of Technology Laboratary of Materials Modification by Laser CHINA
| | - Panlong Zhai
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Zhuwei Li
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Dingfeng Jin
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Jiaqi Cao
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Chen Wang
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Bo Zhang
- Dalian University of Technology School of Chemical Engineering CHINA
| | - Junfeng Gao
- Dalian University of Technology Laboratary of Materials Modification by Laser CHINA
| | - Licheng Sun
- KTH Royal Institute of Technology: Kungliga Tekniska Hogskolan Department of Chemistry SWEDEN
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