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Tu J, Zhang M, Li M, Li M, Li J, Zhi L. Phosphorus-doped nickel cobalt oxide (NiCo 2O 4) wrapped in 3D hierarchical hollow N-doped carbon nanoflowers as highly efficient bifunctional electrocatalysts for overall water splitting. J Colloid Interface Sci 2024; 668:243-251. [PMID: 38678880 DOI: 10.1016/j.jcis.2024.04.156] [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: 02/16/2024] [Revised: 04/11/2024] [Accepted: 04/22/2024] [Indexed: 05/01/2024]
Abstract
Properly design and fabricate capable electrocatalysts with 3D hierarchical hollow framework to realize cost-effective and efficacious overall water splitting (OWS) are particularly meaningful for the large-scale arrangement of pivotal energy technology. In this study, P-doped NiCo2O4 nanoparticles encapsulated in N-doped carbon hierarchical hollow nanoflowers (P-NiCo2O4@NCHHNFs) were constructed using the hydrothermal-pyrolysis-phosphorization approach. This fascinating architecture can not merely serve as a conductive pathway for electron transfer, but at the same time effectively inhibited the aggregation and corrosion of the NiCo2O4 nanoparticles. Additionally, the P doping not only regulates electronic structure configuration to boost the intrinsic activity of the catalyst, but also enhance electrochemical surface areas to reveal more accessible active sites. Attributing to these characteristics, the as-prepared P-NiCo2O4@NCHHNFs exhibit preeminent electrocatalytic performance with low overpotentials of 283 mV and 162 mV for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) (at 10 mA cm-2), respectively. Specifically, by using the P-NiCo2O4@NCHHNFs as bifunctional catalysts, a low potential of 1.56 V (at 10 mA cm-2) is sufficient to drive overall water splitting with splendid durability. This study proposed an innovative strategy for the conceiving and fabricating high-performance catalysts via heteroatom-doping.
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Affiliation(s)
- Jibing Tu
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China
| | - Mingming Zhang
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China
| | - Min Li
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China
| | - Min Li
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China
| | - Jiaxuan Li
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China
| | - Lihua Zhi
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China.
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Lu Y, Li J, Bao X, Zhang L, Jing M, Wang K, Luo Q, Gou L, Fan X. Confined growth of Ultrathin, nanometer-sized FeOOH/CoP heterojunction nanosheet arrays as efficient self-supported electrode for oxygen evolution reaction. J Colloid Interface Sci 2024; 667:597-606. [PMID: 38657543 DOI: 10.1016/j.jcis.2024.04.084] [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: 02/29/2024] [Revised: 03/28/2024] [Accepted: 04/12/2024] [Indexed: 04/26/2024]
Abstract
Self-supported electrodes, featuring abundant active species and rapid mass transfer, are promising for practical applications in water electrolysis. However, constructing efficient self-supported electrodes with a strong affinity between the catalytic components and the substrate is of great challenge. In this study, by combining the ideas of in-situ construction and space-confined growth, we designed a novel self-supported FeOOH/cobalt phosphide (CoP) heterojunctions grown on a carefully modified commercial Ni foam (NF) with three-dimensional (3D) hierarchically porous Ni skeleton (FeOOH/CoP/3D NF). The specific porous structure of 3D NF directs the confined growth of FeOOH/CoP catalyst into ultra-thin and small-sized nanosheet arrays with abundant edge active sites. The active FeOOH/CoP component is stably anchored on the rough pore wall of 3D NF support, leading to superior stability and improved conductivity. These structural advantages contributed to a highly facilitated oxygen evolution reaction (OER) activity and enhanced durability of the FeOOH/CoP/3D NF electrode. Herein, the FeOOH/CoP/3D NF electrode afforded a low overpotential of 234 mV at 10 mA cm-2 (41 mV smaller than FeOOH/CoP grown on unmodified Ni foam) and high stability for over 90 h, which is among the top reported OER catalysts. Our study provides an effective idea and technique for the construction of active and robust self-supported electrodes for water electrolysis.
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Affiliation(s)
- Yao Lu
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China
| | - Julong Li
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China
| | - Xiaobing Bao
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.
| | - Lulu Zhang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China
| | - Maosen Jing
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China
| | - Kaixin Wang
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China
| | - Qiaomei Luo
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China
| | - Lei Gou
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.
| | - Xiaoyong Fan
- School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.
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Zheng J, Meng D, Guo J, Liu X, Zhou L, Wang Z. Defect Engineering for Enhanced Electrocatalytic Oxygen Reaction on Transition Metal Oxides: The Role of Metal Defects. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2405129. [PMID: 38670162 DOI: 10.1002/adma.202405129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 04/25/2024] [Indexed: 04/28/2024]
Abstract
Metal defect engineering is a highly effective strategy for addressing the prevalent high overpotential issues associated with transition metal oxides functioning as dual-function commercial oxygen reduction reaction/oxygen evolution reaction catalysts for increasing their activity and stability. However, the high formation energy of metal defects poses a challenge to the development of strategies to precisely control the selectivity during metal defect formation. Here, density functional theory calculations are used to demonstrate that altering the pathway of metal defect formation releases metal atoms as metal chlorides, which effectively reduces the formation energy of defects. The metal defects on the monometallic metal oxide surface (Mn, Fe, Co, and Ni) are selectively produced using chlorine plasma. The characterization and density functional theory calculations reveal that catalytic activity is enhanced owing to electronic delocalization induced by metal defects, which reduces the theoretical overpotential. Notably, ab initio molecular dynamics calculations, ex situ XPS, and in situ ATR-SEIRAS suggest that metal defects effectively improve the adsorption of reactive species on active sites and enhance the efficiency of product desorption, thereby boosting catalytic performance.
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Affiliation(s)
- Jingxuan Zheng
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Dapeng Meng
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Junxin Guo
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Xiaobin Liu
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Ling Zhou
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Zhao Wang
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
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Shan K, Zhao Y, Zhang B, Wei S, Lin J, Ma J, Ma J, Pang H. Spark plasma sintered porous Ni as a novel substrate of Ni 3Se 2@Ni self-supporting electrode for ultra-durable hydrogen evolution reaction. J Colloid Interface Sci 2024; 662:31-38. [PMID: 38335737 DOI: 10.1016/j.jcis.2024.02.047] [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: 09/14/2023] [Revised: 01/27/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
Developing efficient and durable self-supporting catalytic electrodes is an important way for industrial applications of hydrogen evolution reaction. Currently, commercial nickel foam (NF)-based electrode has been widely used due to its good catalytic performance. However, the NF consisting of smooth skeleton surface and large pores not only exhibits poor conductivity but also provides insufficient space for catalyst decoration and sufficient adhesion, resulting in inadequate catalytic performance and poor durability of NF-based electrodes. In this paper, a novel three-dimensional porous Ni substrate with multangular skeleton surface and small pore structure was prepared by a modified spark plasma sintering technique, and subsequently Ni3Se2@Porous Ni electrode with a large number of Ni3Se2 nanosheets uniformly distributed on the surface was obtained by one-step in-situ selenization. The electrode exhibits outstanding conductivity and catalytic hydrogen evolution reaction, providing a low overpotential of 183 mV at a current density of 100 mA cm-2. Due to the strong interfacial bonding between Ni and Ni3Se2, the Ni3Se2@Porous Ni electrode shows strong durability, which can work stably at 85 mA cm-2 for more than 200 h. This work provides an effective strategy for the rational preparation of metal substrates for efficient and durable self-supporting catalytic electrodes.
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Affiliation(s)
- Kangning Shan
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Yang Zhao
- School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China
| | - Bin Zhang
- School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China
| | - Shizhong Wei
- School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China
| | - Junpin Lin
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Jiping Ma
- School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China
| | - Jiabin Ma
- Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Huan Pang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
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Fu Q, Wang H, Nie K, Wang X, Ren J, Wang R. Phosphorus/sulfur co-doped heterogeneous NiCoP xS y nanoarrays boosting overall water splitting. J Colloid Interface Sci 2024; 653:443-453. [PMID: 37725874 DOI: 10.1016/j.jcis.2023.09.081] [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: 06/16/2023] [Revised: 09/09/2023] [Accepted: 09/11/2023] [Indexed: 09/21/2023]
Abstract
In the large-scale implementation of renewable energy devices, the availability of stable and highly catalytic non-precious metal catalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial. Meanwhile, integrating bifunctional electrocatalysts simultaneously on both the anode and cathode still faces challenges. To address this, a stepped preparation strategy was adopted on a nickel foam (NF) substrate to synthesize P, S co-doped NiCoPxSy nanowire array catalysts. The prepared NiCoPxSy catalysts demonstrated a small Tafel slope of 72.5 mV dec-1 for HER and 72.3 mV dec-1 for OER by requiring only 37 mV (326 mV) overpotential to achieve a current density of 10 mA cm-2 (50 mA cm-2). Moreover, when assembled into an electrolytic cell in 1 M KOH, the NiCoPxSy catalysts achieved a low voltage of 1.55 V at 10 mA cm-2 current density and exhibited long-term stability. The outstanding electrocatalytic performance can be attributed to the influence of doped anions on the electronic states and distribution among different atoms, which thereby positively affected the electrocatalytic activity. This research provides an effective method for designing innovative catalysts and paving the way to produce clean energy.
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Affiliation(s)
- Qianqian Fu
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Hui Wang
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Kunlun Nie
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xuyun Wang
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Jianwei Ren
- Department of Mechanical Engineering Science, University of Johannesburg, Cnr Kingsway and University Roads, Auckland Park 2092, Johannesburg, South Africa.
| | - Rongfang Wang
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; Changshu Institute for Hydrogen Energy, Changshu 215505, China
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