JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2018
·Vol. 165
·期 16
·B916
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IF 3.662
Xingxing Wu,Chunfeng Lao,Yingchun Li,Qunhui Yuan,Wei Gan
Cobalt phosphides embedded in electrocatalysts with low Co/P ratio have recently garnered a great deal of attention due to their high catalytic activities. However, compared to the studies on Co2P and CoP based catalysts, the studies on facile and controllable synthesis of CoP2 based catalysts are few. Herein, two types of cobalt phosphides embedded in 3D carbon nanohybrids (CoPx-N-C) with controllable Co/P ratio were developed via a facile one-step phosphidation-carbonization using a cobalt centered metal-organic framework, ZIF-67, as building block. Based on the high affinity between chloramphenicol (CAP) and cobalt phosphide, the as-prepared CoPx-N-C hybrids were further utilized as electrode components in electrocatalytic determination of CAP in milk and honey. The abundant cobalt phosphide component exhibits high affinity to CAP thus favors its adsorption and facilitates the followed redox reaction. The P-rich CoP2-N-C shows better performance than the metal-rich CoP-N-C in CAP detection, owing to its better electro-activity. The developed CoP2-N-C based sensor exhibits good analytical performance with low detection limit of 0.044 μM (signal-to-noise ratio, S/N = 3) and wide linear range (0.2∼40 μM and 40∼200 μM). The proposed sensor was also applied in the analyses of spiked milk and honey samples, demonstrating its feasibility in CAP analysis.
研究领域:
材料科学
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电化学
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分析化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Ruiqi Guo,Jialun Shi,Lan Hong,Kaiwen Ma,Wenxiang Zhu,Haiwei Yang,Jiajie Wang,Huihua Wang,Minqi Sheng
Electrocatalytic water splitting is a desirable and sustainable strategy for hydrogen production yet still faces challenges due to the sluggish kinetics and rapid deactivation of catalysts in the oxygen evolution process. Herein, we utilized the metal-catalyzed growth technology and phosphating process to fabricate self-supported electrodes (CoxPy@CNT-CC) composed of carbon nanotube (CNT) arrays grown on carbon cloth (CC); thereinto, cobalt-based phosphide nanoparticles (CoxPy) are uniformly encapsulated in the cavity of the CNTs. After further optimization, when the nanoparticles are in the composite phase (CoP2/Co2P), CoP2/Co2P@CNT-CC served as catalytic electrodes with the highest activity and stability for electrocatalytic water splitting in an alkaline medium (1.0 M KOH). The as-prepared CoP2/Co2P@CNT-CC integrates the advantages of the abundant active sites and confinement effect of CNTs, imparting promising electrocatalytic activities and stability in catalyzing both hydrogen evolution reaction and oxygen evolution reaction. Remarkably, electrocatalytic water splitting cells assembled using CoP2/Co2P@CNT-CC electrodes as the cathode and anode, respectively, require a cell voltage of 1.55 V at 10 mA cm–2, which is lower than that of the commercially noble Pt/C/CC and RuO2/CC catalyst couple (1.68 V). Besides, a CoP2/Co2P@CNT-CC||CoP2/Co2P@CNT-CC system shows outstanding durability for a period of 100 h at 10 mA cm–2. This work may provide new ideas for designing bifunctional electrocatalysts for applications in electrocatalytic water splitting.
研究领域:
材料科学
·
电化学
·
能源转换与储存
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SmartMat
·
2021
·Vol. 2
·期 2
·234-245
·
IF 0
Niuwa Yang,Dong Chen,Penglei Cui,Tingyu Lu,Hui Liu,Chaoquan Hu,Lin Xu,Jun Yang
Heterogeneous nanocomposites comprising chemically distinct constituents are particularly promising in electrocatalysis. We herein report a synthetic strategy that combines the reduction of Pt and Co ionic precursors at an appropriate ratio with the subsequent phosphating at an elevated temperature for forming heterogeneous nanocomposites consisting of quasi-spherical Pt 3 Co alloy domains and rod-like CoP 2 domains for high-efficiency methanol electro-oxidation. The strong electronic coupling between Pt 3 Co and CoP 2 domains in the nanocomposites render the electron density around Pt atoms to decrease, which is favorable for reducing the adsorption of poisoning CO-like intermediates on the catalyst surfaces. Accordingly, the as-prepared heterogeneous Pt 3 Co–CoP 2 nanocomposites show good performance for methanol electro-oxidation both in acidic and alkaline media. In specific, at a Pt loading of only 6.4% on a common carbon substrate, the mass-based activity of Pt 3 Co–CoP 2 nanocomposites in an acidic medium is about 2 and 1.5 times as high as that of commercial Pt/C catalyst (20% mass loading) and home-made Pt 3 Co alloy nanoparticles (8.0% mass loading), while in the alkaline medium, these values are 3 and 2, respectively.
研究领域:
材料科学
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电化学
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催化作用
✓ 已验证
产品关联
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xiangdong Xue,Wenjun Dong,Qingjie Luan,Hongyi Gao,Ge Wang
Promoting photo-induced electron transfer is one of the most efficient approaches for improving photocatalytic hydrogen production performance. Herein, we construct a novel interfacial lateral electron migration path by introducing CoP 2 into CdS photocatalytic system as cocatalyst for the first time. This peculiar migration path can be attributed to two aspects: 1) the built-in electric field between CoP 2 and CdS could drive carrier separation effectively; 2) the “metallized” interface serves as a special electron trap to accumulate electrons and promote them transfer along it instead of diffusion into cocatalyst. The energy-efficient interface shortens the electron migration distance and make more hot electrons participate in the reaction at the active sites with lower activation energy. As expected, the optimal hydrogen production rate of CoP 2 /CdS reaches up to 1071 mmol h −1 g −1 , which is one of the most robust photocatalytic hydrogen production systems.
研究领域:
材料科学
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催化
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 13
·期 1
·74
·
IF 5.719
Yafeng Chen,Ge Meng,Ziwei Chang,Ningning Dai,Chang Chen,Xinmei Hou,Xiangzhi Cui
Developing highly efficient, cost effective and durable bifunctional electrocatalyst remains a key challenge for overall water splitting. Herein, a bifunctional catalyst CoP2-Mo4P3/NF with rich heterointerfaces was successfully prepared by a two-step hydrothermal-phosphorylation method. The synergistic interaction between CoP2and Mo4P3heterogeneous interfaces can optimize the electronic structure of active sites, leading to the weak adsorption of H on the Mo sites and the increased redox activity of the Co site, resultantly improving the HER/OER bifunctional catalytic activity. The synthesized CoP2-Mo4P3/NF catalyst exhibits excellent electrocatalytic activity in 1.0 M KOH with low overpotentials of 77.6 and 300.3 at 100 mA cm−2for HER and OER, respectively. Additionally, the assembled CoP2-Mo4P3/NF||CoP2-Mo4P3/NF electrolyzer delivers a current density of 100 mA cm−2at a cell voltage of 1.59 V and remains stable for at least 370 h at 110 mA cm−2, indicating the potential application prospective in water splitting.Keywords:heterogeneous interface;transition metal phosphide;bifunctional electrocatalyst;overall water splitting
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhi Liu,Yu Dai,Xin Han,Chengyi Hou,Kerui Li,Yaogang Li,Hongzhi Wang,Qinghong Zhang
Electrochemical water splitting stands out as a promising avenue for green hydrogen production, yet its efficiency is fundamentally governed by the oxygen evolution reaction (OER). In this work, we investigated the growth mechanism of CoFe hydroxide formed by in situ self-corrosion of iron foam for the first time and the significant influence of dissolved oxygen in the immersion solution on this process. Based on this, the CoP 2 -FeP 4 /IF heterostructure catalytic electrode demonstrates exceptional OER activity in a 1 M KOH electrolyte, with an overpotential of only 253 ± 4 mV (@10 mA cm −2 ), along with durability exceeding 1000 h. Density functional theory calculations indicate that constructing heterojunction interfaces promotes the redistribution of interface electrons, optimizing the free energy of adsorbed intermediate during the water oxidation process. This research highlights the importance of integrating self-corroding in-situ growth with interface engineering techniques to develop efficient water splitting materials.
研究领域:
材料科学
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电化学
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理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Lin Shen,Yongteng Qian,Dong-Hwan Kim,Dae Joon Kang
In this study, cobalt phosphide (CoP 2 ) was synthesized onto a Nickel foam (NF) support via phosphorylation under an N 2 atmosphere. The resulting material was then coated with tetrahydroxyquinone (THQ), a conjugated microporous polymer, using a hydrothermal method. The as-synthesized CoP 2 /THQ@NF showed remarkable electrocatalytic performance for the hydrogen evolution reaction and excellent durability in acidic electrolytes. This was attributed to the synergistic effect of the NF support, CoP 2 , and THQ, which led to a modified electronic structure of CoP 2 and a high electron transfer rate of THQ. A low overpotential of 137 mV was required in a 0.5 M H 2 SO 4 solution to achieve a current density of 10 mA cm −2 .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Chunyan Zhang,Jiaxing Luo,Shaojun Sun,Kailing Yuan,Mingxin Ran,Chuanhua Li,Xuemin Yan
The most crucial part of electrolyzing water lies in the design and preparation of the catalyst. Manganese-doped metal phosphides are often studied as catalysts for water electrolysis due to their outstanding dual-function properties. In this paper, a two-step method of in-situ hydrolysis and low-temperature phosphating is provided to prepare manganese-doped tri-metallic nickel-cobalt-based phosphides ((Mn)CoP 2 /NiCoPs) ultrafine nanoparticles. It is found that the addition of manganese led to a reduction in the unit cell size of NiCoP and CoP 2 in the catalyst. As the amount of manganese element in the raw materials increases, the doping amount of manganese in the catalyst shows an upward trend. In 1 M KOH, (Mn)CoP 2 /NiCoP-2 with the manganese doping content of 0.35 wt% shows the overpotentials of 52 mV for hydrogen evolution reaction (HER) and 141 mV for oxygen evolution reaction (OER) to achieve 10 mA cm −2 . For total hydrolysis reaction, it requires an overpotential of only 1.50 V in 1 M KOH and 1.48 V in simulated seawater environment. Compared with pure Co 2 P/NiCoP, the catalytic activity of (Mn)CoP 2 /NiCoP-2 is higher. This can be attributed to the doping of manganese, which reduces the oxygen content and particle size of the catalyst, and also optimizes its electronic structure.
研究领域:
电催化
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材料科学
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能量转换
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纳米材料
·
水分解
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Peilin Wu,Lin Gao,Liuyan Dong,Zihan Lin,Lili Cui
To prepare bifunctional electrocatalyst towards HER and OER is extremely important for promoting the development of electrochemical water splitting technology. Herein, the element doping method is employed to tune the electron environment of cobalt phosphide (CoP). The Mo-doped CoP supported on carbon cloth (CC) is constructed by solvothermal and annealing method. The effect of Mo on the electron modulation of CoP during different phosphating time was studied carefully. It is noted that the Mo play an important role in tuning the electron state of Co and P elements which can trap the electron and was reduced to low valence, then transfer the electron to Co and P. With increasing the phosphating time, the electron transfer phenomenon between Mo and CoP is obvious. Benefiting from the electron engineering of Mo, Co and P as well as thin and wrinkle sheets structure, the optimal electrocatalyst only requires 39 mV and 251 mV to deliver 10 mA cm −2 for HER and OER, respectively. Also, as for the whole water splitting performance, it delivers 10 mA cm −2 at cell voltage of 1.56 V. Importantly, Faraday efficiency of the optimal catalyst achieves 99.9% for HER due to the tuned electron state of Co and P, high ECSA and low R ct .
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Wenjun Qin,Yong Zhang,Kai Xiang,Zhaoxia Li,Ziyang Wen,Zixun Wang,Jingying Sun,Peng-Fang Zhang,Zhiping Dai,Chun Jiang,Haiqing Zhou,Xiaolin Wei,Yuxue Mo
Developing highly efficient and economical electrocatalysts with both high activity and excellent stability for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and ethanol oxidation reaction (EOR) remains a significant challenge. In our work, a heterostructure CoP 2 -Fe 2 P//CoWO 4 catalyst has been successfully integrated onto Ni foam via a two-step hydrothermal reaction and a phosphorization process. Electrochemical evaluations confirm a synergistic catalytic effect between CoP 2 and Fe 2 P. The CoP 2 -Fe 2 P//CoWO 4 catalyst exhibits enhanced HER catalytic activity across a wide pH range, requiring relatively low overpotentials of only 42, 138 and 32 mV to achieve 10 mA cm −2 under alkaline, neutral and acidic conditions, respectively. Meanwhile, for the EOR, the CoP 2 -Fe 2 P//CoWO 4 catalyst requires a potential of only 1.37 V to achieve 100 mA cm −2 , which is much lower than that required for the OER (1.53 V). Furthermore, density functional theory (DFT) calculations and Raman spectroscopy reveal that high-valence metal species CoOOH and FeOOH are likely the real active species responsible for water dissociation and EOR, respectively. This work may provide a new pathway for heterostructured catalysts based on transition metal phosphides in the field of small-molecule electrolysis.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Junchun Xi,Bohui Zhao,Liang Chen,Yuxiang Chen,Yongfeng Yuan,Pingfan Du
Lithium-sulfur (Li-S) batteries face challenges such as the shuttle effect of lithium polysulfides (LiPSs) and sluggish reaction kinetics. Herein, a freestanding interlayer is constructed by in-situ growing carbon nanotubes (CNTs) encapsulated with CoP 2 /Ni 2 P heterostructured nanoparticles on the surface of waste viscose derived carbon fibers (Ni-Co-P@CNT/CF). The surface of the carbon fibers exhibits a “nano jungle” like morphology. The interconnected carbon fibers framework ensures efficient electron transport. While the tentacle-like Ni-Co-P@CNT structure facilitates the efficient capture of dissolved LiPSs and promotes their liquid-solid reaction. The built-in electric field (BIEF) at the heterointerface facilitates electron transfer, promotes the Li + diffusion and lowers the energy barriers of sulfur species conversion, which enhances LiPSs chemical adsorption and accelerates their conversion kinetics. Electrochemical tests demonstrate its outstanding performance. The cell delivers an impressive reversible capacity of 994 mAh g −1 after 300 cycles at 0.2C with a low decay rate of 0.049% per cycle. When the current density increases to 1.0C, the cell retains 580 mAh g −1 after 450 cycles. Even under high sulfur loadings (3.9 mg cm −2 ), the interlayer can still maintain stable catalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yongkai Sun,Ting Liu,Zhenjiang Li,Alan Meng,Guicun Li,Lei Wang,Shaoxiang Li
Transition metal phosphide (TMP) is one of the most potential electrocatalysts for hydrogen evolution reaction (HER), whereas it is still immensely challenging to construct TMP-based catalyst that performs the excellent catalytic activity for both HER and oxygen evolution reaction (OER) through the proper regulation strategies. Herein, the morphology and interfacial charge regulation strategies were proposed to construct 3D flower-like Co@CoP2 heterostructure electrocatalyst grown in situ on copper foam (CF) for HER and OER. The influence of the phytic acid concentration on the product morphology and composition was systematic investigation. The flower-like Co@CoP 2 Mott-Scottky heterostructure grown on CF (Co@CoP 2 /CF(1:1)) prepared under the optimal conditions shows the eminent electrocatalytic activity of HER with an overpotential of 55 mV and OER with an overpotential of 210 mV at a current density of 10 mA cm −2 in alkaline solution. Remarkably, Co@CoP 2 /CF(1:1)//Co@CoP 2 /CF(1:1) electrolyzer displays a prominent overall water splitting performance with a voltage of 1.54 V at the current density of 10 mA cm −2 , and maintained excellent stability over a period of 100 h operating in 1 M KOH, which is superior to the almost all the reported non-noble-metal-based electrocatalysts. Various ex situ characterizations and density functional theory (DFT) calculations manifested that the superior electrocatalytic performance of Co@CoP 2 /CF (1:1) was attributed to high P content, more important, the unique flower-like morphology and the efficient regulation of interfacial charge drived by the Mott-Scottky effect. This work offers a universal regulation strategy for improve electrocatalytic activity, and opens up a new way for the exploitation of the efficient bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 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）