ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Hongna Xing,Guankui Long,Jiming Zheng,Hongyang Zhao,Yan Zong,Xinghua Li,Yajing Wang,Xiuhong Zhu,Mingtao Zhang,Xinliang Zheng
A novel strategy of boosting electrochemical performance of hybrid supercapacitor cathode based on interface engineering by fabrication of Schottky-type conjunction is proposed. The electrode is composed of binder free 3D CoP nanoflowers decorated by CeO 2 nanoparticles , which was directly grown on nickel foam, forming a conjunction interface. Compared to CoP, the CeO 2 @CoP electrode exhibits remarkable enhanced electrochemical performance. The significantly boosted performance can be attributed to the CeO 2 @CoP interface, which promotes electrons migration from CoP to CeO 2 and eventually forms positive holes on CoP. These positive holes can easily capture more OH − , creating more active sites for redox process . Furthermore, a hybrid supercapacitor full cell composed of CeO 2 @CoP and activated carbon was assembled, which exhibits outstanding energy storage performance with a specific capacity of 486.5 mC cm −2 at 1 mA cm −2 and outstanding cycle stability of 89% after 5000 cycles. The energy density is 55.4 Wh kg −1 at a power density of 955.9 W kg −1 . This work not only demonstrates that CeO 2 is an attractive additive for supercapacitor electrodes, but also provides an experimental/theoretical understanding of the enhanced electrochemical performance by electrons migration process on CeO 2 @CoP interfaces, which is important for the design of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Xuerong Zhou,Xiang Li,Roel Prins,Jinyin Lv,Anjie Wang,Qiang Sheng
CoP and Co 2 P were prepared by temperature-programmed reduction of the mixtures of Co(OH) 2 and H 3 PO 3 with stoichiometric P/Co ratios, but their surfaces were still enriched in phosphorus. Based on the product distributions of the hydrodesulfurization (HDS) of dibenzothiophene (DBT), 1,2,3,4-tetrahydro-dibenzothiophene (TH-DBT), and 1,2,3,4,4a,9b-hexahydro-dibenzothiophene (HH-DBT), a reaction network of DBT HDS was proposed and the mechanisms of the cleavage of different C S bonds in DBT and its hydrogenated intermediates were discussed. CoP was much more active and more nitrogen-tolerant than Co 2 P, which make it a promising HDS catalyst. The HDS reactions over CoP and Co 2 P followed a pseudo-first-order kinetics and a pseudo-zero-order kinetics, respectively. Piperidine strongly inhibited the hydrogenation/dehydrogenation reactions and the direct desulfurization of DBT, but its inhibition on the desulfurization of TH-DBT and HH-DBT were less pronounced. The active surfaces of CoP and Co 2 P in HDS reactions can be cobalt phosphosulfide phases.
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2017
·Vol. 2017
·期 40
·4797-4802
·
IF 2.444
Yulan Peng,Lingzhi Wang,Yongdi Liu,Haijun Chen,Juying Lei,Jinlong Zhang
Graphical A CoP-decorated g-C 3 N 4 composite catalyst was developed for highly efficient and stable photocatalytic production of H 2 O 2 under visible-light irradiation. The CoP nanoparticles act as a noble metal free cocatalyst for g-C 3 N 4 to enhance the visible-light absorption and promote the separation of photogenerated charge carriers. A composite catalyst combining CoP with g-C 3 N 4 was explored for the photocatalytic production of H 2 O 2 under visible-light irradiation. The composite catalyst was fabricated by growth of CoP nanoparticles on the surface of g-C 3 N 4 . The CoP nanoparticles were well dispersed on the surface of g-C 3 N 4 and could interact with g-C 3 N 4 to improve charge separation and electron transfer. The composite catalyst showed superior catalytic activity compared with pure CoP or g-C 3 N 4 under visible-light irradiation. The optimal catalyst with 1.76 wt.-% CoP loading exhibited the best photocatalytic efficiency with an H 2 O 2 production of 140 µ m in 2 h, which is about 4.6 and 23.3 times those of pure g-C 3 N 4 and pure CoP, respectively. A possible mechanism for the visible-light-driven photocatalytic production of H 2 O 2 is proposed. The composite catalyst exhibited stable performance without obvious loss of catalytic activity after seven successive runs, and thus has good application prospects in sustainable H 2 O 2 production.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 3
·e202101482
·
IF 4.782
Hao Cui,Min Jiang,Gang Tan,Jianping Xie,Pengfei Tan,Jun Pan
Graphical Ru-CoP/CC electrocatalyst for hydrogen evolution was synthesized through simple in-situ hydrothermal and gas phosphatized treatments, which only needs 44 mV to reach 10 mA cm −2 , exceeding many reported electrocatalysts. Meanwhile, the reason and the result of electrons redistribution after Ru doping were deeply investigated. Exploring highly efficient, durable and low-cost catalysts for hydrogen evolution reaction (HER) is crucial to promoting the development of electrochemical water splitting systems but remains challenging. In this work, the Ru-modified CoP nanoflakes on carbon clothes (Ru-CoP/CC) are fabricated via an in-situ hydrothermal method, followed by low-temperature phosphatized treatments. According to X-ray photoelectron spectroscopy (XPS) measurements, the Ru doping induces the electron deviation from Ru to Co−P, and makes Co ions be an electron-rich state. It is revealed that the introduction of Ru can effectually reconstruct the electron coordination environment of Co−P. The resultant Ru-CoP/CC catalyst shows outstanding HER performance with an ultralow overpotential of 45 mV at 10 mA cm −2 . Moreover, the obtained catalyst exhibits long-term durability at 20 mA cm −2 for 20 h in the alkaline solution. This work opens a new avenue to lower the usage of noble metal in electrocatalyst and helps to developing a high-performance electrocatalyst for HER.
研究领域:
材料科学
·
电化学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Long Zeng,Lu An,Zhijie Zhang,Jie Zheng,Wenxuan Chen,Chao Liu,Yuying Zheng,Dai Dang,Zhao-Qing Liu
Development of non-noble bifunctional electrocatalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are of great significance under alkaline electrolytes for overall water splitting. In this work, CoP/FeP has been designed and constructed in situ on carbon fiber paper by using the bimetallic metal organic frameworks (MOFs) synthesis strategy. The heterogeneous CoP/FeP displays excellent catalytic activities in both HER and OER of the fully hydrolyzed semi-reaction. Remarkably, CoP/FeP is applied as the bifunctional electrode in anode and cathode to construct an overall water splitting apparatus, resulting in the low cell voltage and excellent stability. The exceptional electrocatalytic performance may be mainly attributed to the heterogeneous interface, which constructs a built-in electric field to provide electron to Co with electron-rich structure, resulting in the strong adsorption of H and weak adsorption of O 2 on Co. This study provides an effective and controllable method for the design of self-supporting bimetal phosphide catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Yanxia Zeng,Xiashi Zhu,Yuheng Zhang,Songqing Chen,Wei Zhang,Lei Wang
Electrochemical water electrolysis is an efficient important way to produce hydrogen. In this work, durable and low-cost Co 2 P/CoP was synthesized by a facile one-step calcination reaction. Subsequently, Co 2 P/CoP was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microcopy (TEM), X-ray photoelectron spectra (XPS). To evaluate the electrocatalytic hydrogen evolution activity, Co 2 P/CoP was measured by electrochemical tests. Co 2 P/CoP exhibited excellent HER performance with a small overpotential of 196 mV at a current density of 10 mA cm −2 and a smaller Tafel slope of 53 mV dec −1 in alkaline media. Moreover, Co 2 P/CoP exhibited superior stability with long-term operation of 24 h.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hui Zong,Le Hu,Zhenguo Wang,Ruijuan Qi,Ke Yu,Ziqiang Zhu
It is significant to exploit novel electrode materials because at present the severe capacity decline and slow ion kinetics limit the broad application of lithium-based batteries. Herein, we have prepared the metal–organic frameworks-derived CoP anchored on Ti 3 C 2 MXene (MOFs-CoP@MXene) and fully explored its synergy as an efficient bifunctional electrode for enhanced lithium storage for the first time. It is gratifying that the prepared MOFs-CoP@MXene provides a high capacity of 706.5 mAh g −1 after 200 cycles at 0.2 A g −1 , as the anode for lithium-ion batteries (LIBs). It can provide 585.8 mAh g −1 after 1000 cycles with 0.5 A g −1 . The MOFs-CoP@MXene anode has robust lithium-ion storage capacity, indicating that it can increase the charge transfer rate and improve Li + diffusion kinetics with enhanced electrochemical activity. As lithium-sulfur batteries (LSBs) cathode, MOFs-CoP@MXene/S shows 796.9 mAh g −1 after 300 cycles at 0.2C. MOFs-derived CoP coupling with MXene exhibits enhanced capture capacity of sulfur, facilitating the conversion of polysulfides. The results show that the MOFs-CoP@MXene composite prepared for the first time are feasible as both the anode of LIBs and the cathode of LSBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 21
·5504-5510
·
IF 4.853
Zi-Cheng Fu,Joshua T. Moore,Zi-Xin Yang,Jia-Jun Hu,Wen-Fu Fu
Graphical CoP for photocatalysis : Sphericalmesoporous SBA-15-supported CoP nanoparticlecatalysts tuning the highly efficient photocatalytic CO-and H 2 -generating pathways with product selectivity of up to 76.3 %and 99.9 % through switching solvent, respectively, were in situ fabricated by CoP embedded on the surface and interior of the porous s-SBA-15. The highly active spherical hybrid catalysts with diameters of 3–8 μm for robust selective CO 2 photoreduction and hydrogen production by switching solvent, CoP/(i)s-SBA-15 and CoP/(o)s-SBA-15, were in situ synthesized for the first time by incorporating CoP nanoparticles on the interior and outside of the spherical mesoporous Santa Barbara Amorphous (s-SBA)-type material s-SBA-15. CoP/(i)s-SBA-15 has a larger pore diameter of ∼9.5 nm, relative to ∼5.7 nm of CoP/(o)s-SBA-15, and a calculated Brunauer-Emmett-Teller surface area of ∼214 m 2 g −1 compared with ∼336 m 2 g −1 for the latter. In comparison with bare CoP, the composites exhibited excellent catalytic CO- and H 2 -generating performance with product selectivity of up to 76.3 % and 99.9 % through switching solvents containing Ru-based photosensitizer under ambient conditions, respectively. The influences of various solvents and electron donors, as well as the amounts of H 2 O, and catalyst on reaction kinetics for CO 2 reduction and H 2 production, and intrinsic properties of both catalysts were investigated and compared.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 8
·3387-3396
·
IF 2.5
Ze-Feng Xu,Jia Xue,Lei-Lei Li,Xing-Liang Yin,Chuan-Wu Chen,Ya-Nan Jing,Da-Qiang Liu
Developing efficient, stable, and cost-effective electrocatalysts is essential for advancing sustainable water splitting and renewable energy technologies. Here, we report the design of a novel salt-flower-shaped FeP–CoP catalyst, leveraging its unique morphology and synergistic composition for enhanced bifunctional electrocatalysis. The catalyst showed outstanding performance in both hydrogen evolution (HER) and oxygen evolution reactions (OER), achieving low overpotentials of 105 mV and 320 mV at a current density of 10 mA cm−2 for HER and OER, respectively, with Tafel slopes of 106.73 and 93.27 mV dec−1. The exceptional catalytic performance is attributed to the optimized phosphorization process, which enhances active site density, and the synergistic interaction between FeP and CoP, facilitating efficient charge transfer. This study highlights the potential of low-cost, earth-abundant metal-based catalysts for sustainable hydrogen and oxygen production, paving the way for scalable water-splitting technologies.
研究领域:
材料科学
·
可再生能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Zequn Chen,Hongbo Wu,Jian Li,Yifeng Wang,Wei Guo,Chuanbao Cao,Zhuo Chen
Driven by the demands of environmental protection and seeking renewable energy sources, developing non-precious-metal based electrocatalysts with preeminent activity and stability for the hydrogen evolution reactions (HER) has received intensive attention, but it still remains a great challenge. Here we demonstrate defects on reduction graphene oxide (rGO) not only can serve as nucleation sites for uniform CoP nanoparticle growth, but also generate more isolated electrons, significantly changing the local charge state of P around the defects and leading to an optimized Gibbs free energy of H adsorption. The CoP nanoparticles adsorbed on the defects of reduction graphene oxide (CoP@DrGO) showed remarkable electrocatalytic activity toward the HER in the base solution with an overpotential of 36.6 mV at 10 mA·cm –2 and a Tafel slope of 43.1 mV dec −1 , which are not only superior to most of other CoP-based materials reported previously but also comparable to the commercial Pt/C catalyst. This work not only provides a highly efficient, low-cost and stable electrocatalyst for HER, but also offers a new way of designing high-performance electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 16
·10030-10040
·
IF 4.22
Zhang Xinzhe,Yu Zuoyang,Wang Changle,Gong Yuanyuan,Ai Bing,Zhang Lipeng,Wang Jie
Lithium–sulfur (Li–S) batteries have attracted much attention because of their high theoretical capacity and energy density and the advantages of sulfur, such as its low price, abundant reserves, low toxicity, and environmental friendliness. Li–S batteries are considered one of the most promising energy storage devices but suffer from shortcomings, such as their rapid capacity decay, short cycle life, and low Coulomb efficiency. We designed and prepared a new type of sulfur cathode material (NC@CoP–Co 3 O 4 ) that consisted of a CoP–Co 3 O 4 heterojunction uniformly distributed on the surface of hollow nitrogen-doped carbon tubes to overcome these problems. The NC@CoP–Co 3 O 4 hybrid nanocomposite can provide excellent electrical conductivity and effectively suppress the shuttle effect through the synergetic effect of physical confinement and chemical bonding. As a result, the Li–S battery maintained a capacity of 476 mAh g −1 at 700 cycles at 1 C and a long-term cycle stability of 70.3% after 700 cycles with an average capacity decay rate of only 0.057% per cycle.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Meng Song,Jinbo Wang,Xiao Zhang,Jinxue Guo
Seawater electrolysis to produce hydrogen and oxygen is an attractive candidate for renewable energy, but bottlenecks still remain to develop efficient and stable electrocatalysts. Herein, the N-doped carbon enveloped CoP hierarchical core-shell structured nanoarray is fabricated on carbon fiber cloth through a controllable approach. Scanning electron microscope and transmission electron microscope reveal the nanoarray architecture and core-shell structure of CoP@NC. When tested as bifunctional catalysts toward water electrolysis, the sample demonstrates efficient catalysis performances with low HER overpotentials of 136/139 mV and OER overpotentials of 238/244 mV to generate a current density of 100 mA cm −2 in alkaline water/seawater, respectively. The two-electrode system of CoP@NC/CC= |CoP@NC/CC needs low cell voltage of 1.68 V to yield 100 mA cm −2 in alkaline seawater, which can maintain the performance for over 100 h. The charming hierarchical core-shell structure, appropriate components, and specific nanoarray morphology are synergistically responsible for the good electrocatalysis performances.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）