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Li GL, Miao YY, Deng F, Wang S, Wang RX, Lu WH, Chen RL. Highly-dispersed 2D NiFeP/CoP heterojunction trifunctional catalyst for efficient electrolysis of water and urea. J Colloid Interface Sci 2024; 667:543-552. [PMID: 38657538 DOI: 10.1016/j.jcis.2024.04.059] [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: 10/07/2023] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024]
Abstract
The electrocatalytic production of "green hydrogen", such as through the electrolysis of water or urea has been vigorously advocated to alleviate the energy crisis. However, their electrode reactions including oxygen evolution reaction (OER), urea oxidation reaction (UOR), and hydrogen evolution reaction (HER) all suffer from sluggish kinetics, which urgently need catalysts to accelerate the processes. Herein, we design and prepare an OER/UOR/HER trifunctional catalyst by transforming the homemade CoO nanorod into a two-dimensional (2D) ultrathin heterojunction nickel-iron-cobalt hybrid phosphides nanosheet (NiFeP/CoP) via a hydrothermal-phosphorization method. Consequently, a strong electronic interaction was found among the Ni2P/FeP4/CoP heterogeneous interfaces, which regulates the electronic structure. Besides the high mass transfer property of 2D nanosheet, Ni2P/FeP4/CoP displays improved OER/UOR/HER performance. At 10 mA cm-2, the OER overpotential reaches 274 mV in 1.0 M KOH, and the potential of UOR is only 1.389 V in 1.0 M KOH and 0.33 M urea. More strikingly, the two-electrode systems for electrolysis water and urea-assisted electrolysis water assembled by NiFeP/CoP could maintain long-term stability for 35 h and 12 h, respectively. This work may help to pave the way for upcoming research horizons of multifunctional electrocatalysts.
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Affiliation(s)
- Guang-Lan Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, PR China.
| | - Ying-Ying Miao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, PR China
| | - Fei Deng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, PR China
| | - Shen Wang
- Leicester International Institute, Dalian University of Technology, Panjin 124221, PR China
| | - Rui-Xin Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, PR China
| | - Wei-Hang Lu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, PR China
| | - Ru-Liang Chen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, PR China
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Dong YW, Zhai XJ, Wu Y, Zhou YN, Li YC, Nan J, Wang ST, Chai YM, Dong B. Construction of n-type homogeneous to improve interfacial carrier transfer for enhanced photoelectrocatalytic hydrolysis. J Colloid Interface Sci 2024; 658:258-266. [PMID: 38104408 DOI: 10.1016/j.jcis.2023.12.080] [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: 10/19/2023] [Revised: 12/08/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
Photoelectrocatalyzed hydrogen production plays an important role in the path to carbon neutrality. The construction of heterojunctions provides an ideal example of an oxygen precipitation reaction. In this work, the performance of the n-n type heterojunction CeBTC@FeBTC/NIF in the photoelectronically coupled catalytic oxygen evolution reaction (OER) reaction is presented. The efficient transfer of carriers between components enhances the catalytic activity. Besides, the construction of heterojunctions optimizes the energy level structure and increases the absorption of light, and the microstructure forms holes with a blackbody effect that also enhances light absorption. Consequently, CeBTC@FeBTC/NIF has excellent photoelectric coupling catalytic properties and requires an overpotential of only 300 mV to drive a current density of 100 mA cm-2 under illumination. More importantly, the n-n heterojunction was found to be effective in enhancing charge and photogenerated electron migration by examining the carrier density of each component and carrier diffusion at the interface.
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Affiliation(s)
- Yi-Wen Dong
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xue-Jun Zhai
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Yang Wu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Ya-Nan Zhou
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Yi-Chuan Li
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Jun Nan
- CNOOC Tianjin Chemical Research and Design Institute Co., Ltd, Tianjin 300131, China
| | - Shu-Tao Wang
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Yong-Ming Chai
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.
| | - Bin Dong
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China.
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Hu YW, Sultana F, Balogun MS, Xiong T, Huang Y, Xia Y. Bi-cation incorporated Ni 3N nanosheets boost water dissociation kinetics for enhanced alkaline hydrogen evolution activity. NANOSCALE 2024; 16:4325-4332. [PMID: 38357773 DOI: 10.1039/d3nr05957j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Nickel nitride (Ni3N) is a promising electrocatalyst for the hydrogen evolution reaction (HER) owing to its excellent metallic features and has been demonstrated to exhibit considerable activity for water oxidation. However, its undesirable characteristics as an HER electrocatalyst due to its poor unfavourable d-band energy level significantly limit its water dissociation kinetics. Herein, the HER electrocatalytic activity of Ni3N was prominently enhanced via the simultaneous incorporation of bi-cations (vanadium (V) and iron (Fe), denoted as V-Fe-Ni3N). The optimized V-Fe-Ni3N displays impressive performance with an overpotential of 69 mV at 10 mA cm-2 and good stability in 1.0 M KOH, which is remarkably better than pristine Ni3N, V-doped Ni3N, and Fe-doped Ni3N and considerably closer to a commercial Pt/C catalyst. Based on density functional theory (DFT) studies, V and Fe atoms not only serve as active sites for promoting water dissociation kinetics but also tune the electronic structure of Ni3N to achieve optimized hydrogen adsorption capabilities. This work presents an inclusive understanding of the rational designing of high-performance transition metal nitride-based electrocatalysts for hydrogen production. Its electrocatalytic performance can be significantly enhanced by doping transition metal cations.
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Affiliation(s)
- Yu-Wen Hu
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, China.
| | - Fozia Sultana
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, China.
| | - M-Sadeeq Balogun
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, China.
| | - Tuzhi Xiong
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.
| | - Yongchao Huang
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, P. R. China
| | - Yu Xia
- Department of Gastroenterology and Hepatology, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, 510180, China.
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Phan VTT, Nguyen QP, Wang B, Burgess IJ. Oxygen Vacancies Alter Methanol Oxidation Pathways on NiOOH. J Am Chem Soc 2024; 146:4830-4841. [PMID: 38346096 DOI: 10.1021/jacs.3c13222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
A thorough comprehension of the mechanism underlying the methanol oxidation reaction (MOR) on Ni-based catalysts is critical for future electrocatalytic design and development. However, the mechanism of MOR on these materials remains a matter of controversy. Herein, we combine in situ surface-enhanced infrared absorption spectroscopy (SEIRAS) and density functional theory (DFT) calculations to identify the active sites and determine the mechanism of MOR on monometallic Ni-based catalysts in alkaline media. The SEIRAS results show that formate and (bi)carbonate are formed after the commencement of the MOR with potential-dependent relative distributions. These spectroscopic results are in good agreement with the DFT-computed reaction profiles over an oxygen vacancy, suggesting that the MOR mainly proceeds through the formate-involving pathway, in which the early consumption of methanol yields formate as the major product, while increasing potential drives further oxidation of formate to (bi)carbonate. We also find a parallel pathway for the generation of (bi)carbonate at high potentials that bypasses the formation of formate. The two main pathways are thermodynamically more feasible than the one predominantly reported in the literature for MOR on NiOOH that involves CHO and/or CO as key intermediates. These DFT results are supported by spectroscopic evidence showing that no band associated with CHO or CO can be detected by SEIRAS, which is attributed to the nature of the oxygen vacancies as the active sites, suppressing deep dehydrogenation of CH2O to CHO. This work thus shows the promising role of defect engineering in promoting the electrocatalytic MOR activity and selectivity.
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Affiliation(s)
- Vi Thuy Thi Phan
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Quy P Nguyen
- School of Sustainable Chemical, Biological and Materials Engineering, The University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Bin Wang
- School of Sustainable Chemical, Biological and Materials Engineering, The University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Ian J Burgess
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
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