Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 3
·823-830
·
IF 4.912
Sen Gao,Maoxia Yang,Shaomin Li,Ji Xia,Jun Mei,Song Xie,Hao Liu
Cobalt phosphide (CoP) is a promising substitute for precious platinum as a hydrogen evolution reaction (HER) electrocatalyst owing to its semi-metallic properties and favorable adsorption and desorption activity for hydrogen. In this work, we design a facile and simple method for the preparation of homogeneously dispersed CoP nanoparticles with carbon spheres (CSs) as the support. Due to the good dispersion of CoP, in situ doping of phosphorus in CSs and the good electrical conductivity of the support, the prepared CoP/CSs-0.05 catalyst exhibits superior HER electrocatalytic performance with a low onset overpotential of 34 mV and an overpotential of 94 mV to afford a current density of 10 mA cm−2 in 0.5 M H2SO4.
研究领域:
材料科学
·
电化学
·
能量转换
·
纳米催化
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DOI
高影响因子
ACS Applied Nano Materials
·
2026
·Vol. 9
·期 36
·17135-17146
·
IF 5.8
Hussain Mansor,Hao Lu,Tabassum Khadija,Nasrullah Abdur Rehman,Fu Yuan,Ma Xinyi,Wei Yajuan,Liu Jia
Urea oxidation reaction (UOR) represents a promising
route for
sustainable hydrogen generation and wastewater purification, serving
as an energy-saving alternative to the oxygen evolution reaction.
Here, we develop a Co-doped AgP 2 /CoP nanoelectrocatalyst
(denoted as CoAgP 2 /CoP), which forms a hierarchical nanostructure.
The nanoelectrocatalyst demonstrates excellent UOR performance, requiring
a low onset potential of 1.23 V vs RHE to deliver 10 mA cm –2 , exhibiting a small Tafel slope of 23.36 mV dec –1 , and maintaining remarkable stability for over 240 h in alkaline
urea electrolyte. Experimental characterization confirms that Co species
are oxidized into catalytically active Co 3+ species, while
phosphorus is transformed into oxidized P–O species that stabilize
the active interface, and Ag facilitates electron transfer. Mechanistic
investigations reveal that, within the composite hierarchical framework,
urea undergoes sequential N–H and C–N bond cleavage
at the P-assisted Co 3+ active sites. The addition of Ag
further reduces the energy barrier for generating high-valence active
species. The hierarchical nanoarchitecture enlarges the electrochemically
active surface area and enhances mass transport. This work highlights
the synergistic effects arising from the multielement composition
and hierarchical nanostructure in promoting urea electrooxidation,
providing a feasible strategy toward energy-efficient hydrogen production
and environmental remediation.
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DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Zhongxian Li,Xingzhao Wang,Yuewen Xu,Xiaoran Li,Jianchao Zhang,Yang Liu,Jiabing Luo,Yan Zhou
Slow mass transport and charge transfer restrict the electrocatalytic oxygen evolution reaction (OER) activity of FeP. Herein, we synthesized Fe-based bimetallic Prussian blue analogues (CoFe, NiFe, and CuFe-PBAs), and further prepared nitrogen-doped carbon anchored FeP-based heterostructures namely CoP-FeP/NC, Ni 2 P-FeP/NC, and Cu 3 P-FeP/NC using template-assisted and phosphating annealing strategies. It is worth noting that CoP-FeP/NC shows a hollow nanocubic structure, shortening the ion transport pathway and facilitating surface atom exposure, thus improving reaction kinetics. Meanwhile, the similar atomic radius of Co and Fe promotes the formation of stable CoP-FeP heterointerfaces with the same crystal system components and low lattice mismatch, inducing the electron transfer from Co to Fe and generating more low-valent Fe cations, thereby enhancing activity. Besides, Co and Fe sites underwent surface reconstruction into CoOOH and FeOOH active species, therefore achieving efficient synergistic electrocatalytic OER. As a result, CoP-FeP/NC exhibits superior OER activity (254 mV@10 mA cm −2 ) than Ni 2 P-FeP/NC and Cu 3 P-FeP/NC in 1.0 M KOH solution, even exceeds commercial RuO 2 (266 mV@10 mA cm −2 ), and presents no obvious performance decay (11.26 %) after continuous electrolysis at 100 mA cm −2 for 100 h, showing practical application prospects. Our work provides a general approach for preparing efficient and stable FeP-based heterostructures as OER 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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Guohao Li,Kangli Chen,Wenfeng Wang,Lu Zhang,Shumin Han,Yuan Li
Developing low-cost and high-performance catalysts for alkaline HER is essential for hydrogen production technologies. Cobalt phosphide (CoP) material has become a candidate material for replacing precious metal catalysts due to its high natural abundance and adjustable electronic structure. However, the inherent structure and limited active sites of cobalt phosphide limit its catalytic performance. Cobalt phosphide (CoP/CP) self-supporting electrodes, grown in-situ on carbon paper (CP), have been prepared using a morphology control strategy. By using surfactant PEG-6000 the morphology of α-Co(OH) 2 precursors, and subsequently the microstructure, crystal structure, surface chemical state and hydrophilicity of CoP are regulated. The self-assembly of CoP nanosheets form a monolayer material with regular staggered arrangement and uniform pore structure. The alkaline hydrogen evolution reaction (HER) tests reveal that the CoP/CP electrode prepared with 0.4 g L −1 PEG-6000 and a phosphorization temperature of 350 °C exhibits excellent electrocatalytic activity in 1.0 M KOH. It needs only a low overpotential of 96 mV to deliver a current density of 10 mA cm −2 , along with a small Tafel slope of 67.0 mV dec −1 . The study provides a new approach for adjusting the performance of cobalt phosphide catalysts.
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DOI
高影响因子
Progress in Natural Science-Materials International
·
2014
·
IF 1.143
Yundan Yu,Zhenlun Song,Hongliang Ge,Guoying Wei
Electroless deposition technology has been considered as a kind of common ways to obtain cobalt alloy films. However, in order to get cobalt alloy films, high temperature (353 K) is necessary during the electroless deposition process which will increase costs and energy consumption. Ultrasonic was introduced during electroless plating process to obtain cobalt alloy films at lower initial temperature. It was found that the cobalt thin films could be prepared at lower initial temperature (323 K) with the introduction of ultrasonic. Therefore, different powers of ultrasonic were applied during the electroless deposition process to prepare CoP thin films on copper substrates from an alkaline bath in this investigation. The effects of different powers of ultrasonic on deposition rate, surface morphology, anticorrosion performance and magnetic property of films were studied. It was found that the deposition rate increased gradually with the rise in ultrasonic powers due to cavitation phenomenon. All the CoP films presented the typical spherical nodular structures with the impact of ultrasonic. Smaller and regular shaped structures could be observed when the films were deposited with higher power of ultrasonic which contributed directly to enhancement of anticorrosion performance. Saturation magnetization and coercivity of thin films increased gradually with the rise in ultrasonic powers during the electroless deposition process due to the higher amounts of cobalt.
研究领域:
材料科学
·
电化学
·
薄膜技术
·
超声处理
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 6
·2826-2832
·
IF 2.2
Nan Jue,Liao Haiyang,Ye Beirong
The quest for electrocatalysts that are both stable and efficient for seawater oxidation is intriguing yet presents significant challenges. Herein, we present a hierarchical NiFe-LDH@CoP core–shell array on carbon cloth (NiFe-LDH@CoP/CC) for efficient oxygen evolution reaction (OER) in an alkaline seawater electrolyte. The NiFe-LDH@CoP/CC array exhibits remarkably low overpotential of 251 mV to achieve current density of 500 mA cm −2 . Moreover, it features a modest Tafel slope of 24.9 mV dec −1 . Importantly, this electrocatalyst sustains its robust stability during continuous electrolysis for 300 h at 500 mA cm −2 . The outstanding performance and unique hierarchical structure of the NiFe-LDH@CoP/CC array provides innovative insights for the development of efficient electrocatalysts tailored for seawater oxidation applications.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yuancai Ge,Hang Chu,Jiyi Chen,Peiyuan Zhuang,Qianyi Feng,William R. Smith,Pei Dong,Mingxin Ye,Jianfeng Shen
Constructing regularly catalytic arrays is essential for electrochemical catalysis, especially for hydrogen evolution reaction (HER). In this work, two-dimensional zeolitic imidazolate framework (ZIF) arrays were chosen as templates to construct few-layer MoS2-decorated hollow CoP. By coupling MoS2 nanosheets arrays and two-dimensional ZIF-67 derived CoP, the advantages of the active sites of MoS2 nanosheets edges and CoP are combined for efficient HER, which can drive a current density of 100 mA/cm2 in both acid (91 mV) and alkaline (135 mV) solutions for 10 h. Furthermore, the prepared catalyst can reach a current density of 10 mA/cm2 with overpotentials of only 53 and 77 mV in 0.5 M H2SO4 and 1 M KOH, respectively. Most importantly, we believe replacing ZIF-67 powders with 2D ZIF-67 arrays can boost the electrochemical activities for HER and this method can provide us a guideline for the future application of two-dimensional ZIF-67 arrays to construct efficient electrocatalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 2
·1-8
·
IF 6.232
Hou Chuantao,Zhang Xueli,Wang Lei,Zhang Fan,Huang Xiaolian,Wang Zonghua
A freestanding and flexible buckypaper modfied with CoP/Co (CoP/Co-BP) is described. It has a sponge-like nanostructure and is shown to enable improved nonenzymatic sensing of glucose. The CoP/Co-BP was prepared by first depositing a uniform layer of ZIF- 67 crystals on BP, followed by two steps of pyrolysis treatment and phosphidation under an argon atmosphere. The morphology and structure of the material were characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The electrochemical properties were investigated by cyclic voltammetry and amperometric response. The amperometric sensor, best operated at 0.45 V (vs. SCE) at pH 13 has a linear range that extends from 0.5 μM to 1.8 mM of glucose, a 0.2 μM detection limit (at S/ N = 3), and a sensitivity of 6427 μA mM −1 cm −2 in alkaline solution. This is mainly attributed to the synergistic effect between the highly active CoP nanostructure and BP which results in excellent conductivity. The uniformly distributed CoP nanoparticles in the network of BP prevent the formation of close-packed structure and facilitate electron transfer. The sensor has good selectivity and excellent long-term stability. It was applied to the determination of glucose in spiked human serum, and satisfactory results were obtained.
Schematic presentation of a freestanding and flexible buckypaper modfied with CoP/Co. It has a sponge-like nanostructure and exhibits improved catalytic activity toward glucose oxidation. This material was used for high-performance electrochemical glucose sensing.
研究领域:
材料科学
·
生物医学工程
·
分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shao-Bo Guo,Wei-Bin Zhang,Ze-Qin Yang,Shan-Shan Chai,Xian-Li Zhang,Xia Zhou,Xiong-Wei Han,Jianping Long
It has become a consensus to study transition metal phosphides with abundant earth reserves and good electrochemical properties as electrode materials for supercapacitors . Among them, cobalt phosphide is particularly attractive because of its good electrical conductivity and theoretical specific capacity. Therefore, cobalt phosphide composites were prepared by hydrothermal reaction and phosphating reaction in this paper. Due to the synergistic effect of different components and the interfacial effect between the components, the ion transport and charge transfer kinetics of the prepared Co/Co 2 P/CoP electrode are both improved, which exhibits excellent electrochemical performance. At the current density of 1 A g −1 , the prepared Co/Co 2 P/CoP electrode material has a specific capacitance of 193.3 mA h g −1 , after 6000 cycles of charge and discharge at the current density of 2 A g −1 , the specific capacitance maintains at 80 %. An asymmetric supercapacitor was assembled with the prepared material as the positive electrode and activated carbon as the negative electrode, which can provide an energy density of 37.87 W h kg −1 at a power density of 799.6 W kg −1 . At the current density of 1 A g −1 , the assembled supercapacitor can maintain 80 % of the initial specific capacitance after 5000 cycles. This provides ideas for future research on this type of energy storage materials .
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ANALYST
·
2015
·Vol. 141
·期 1
·256-260
·
IF 4.107
Qiang-Qiang Sun,Min Wang,Shu-Juan Bao,Yu Chen Wang,Shuang Gu
The nanorods of cobalt phosphide have been prepared and evaluated as an electrocatalyst for non-enzyme glucose detection. The nanorods were used to modify the surface of an electrode and detect glucose without the help of an enzyme for the first time. The crystal structure and composition of cobalt phosphide were identified by XRD and XPS, respectively, and the morphology of the as-prepared samples was observed by FESEM and TEM. The electrochemical measurement results indicate that the CoP-based sensor exhibits excellent catalytic activity and a far lower detection potential compared to bare GCE. Specifically, the electrocatalytic mechanism of CoP in the detection of glucose was proposed based on a series of physical characterization methods, electrochemical measurements, and theoretical calculations.
研究领域:
材料科学
·
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Dingfeng Ma,Zeyang He,Tao Wei,Liang Wang,Yang Li,Kiushkin Vladimir Yurievich,Romanov Anton,Ting Bian,Shitan Yan
Bifunctional electrocatalysts with the joint merits of being highly efficient, stable, and low-cost are essential for overall water splitting applications. Herein, we reported a unique amorphous/crystalline coupling structure consisting of crystalline CoP nanocrystals with amorphous CoMoP in-situ growth on nickel foam (termed as CoP/a-CoMoP/NF). This was achieved through oxidation-phosphating in two successive steps by Keggin-type POM (H 3 PMo 12 O 40 ) embedded into the zeolitic imidazolate framework-67 (ZIF-67) as the precursor. The Mo doping and crystalline/amorphous coupling structures of CoP and CoMoP modulate the electronic structure, increase the electrocatalytic active sites, and promote the interfacial electron transfer , thus accelerating the catalytic kinetics of both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The amorphous CoMoP serves a protective role in preventing corrosion during the electrochemical process . The catalyst exhibits low overpotentials of 301 mV and 250 mV to drive a current of 100 mA cm −2 for OER and HER, respectively, and demonstrates excellent stability for both reactions. Furthermore, the alkaline electrolytic cell assembled with CoP/a-CoMoP/NF catalysts as both the anode and cathode requires only 1.66 V and 1.73 V to drive current densities of 50 and 100 mA cm −2 , respectively. This study offers a rational strategy for the development of efficient bifunctional electrocatalysts for hydrogen generation .
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
RARE METALS
·
2023
·
IF 8.8
Zhang Chen-Chen,Wei Sheng,Sun Li-Xian,Ouyang Yi-Fang,Xu Fen,Chu Hai-Liang,Pan Hong-Ge,Chen Li-Xin,Xiao Xue-Zhang
Electrocatalytic water splitting coupled with sustainable energies is identified as an environmentally friendly and renewable strategy to generate high-quality hydrogen for the fuel cells. However, the main challenge is to develop high performance, low cost and chemically stable electrocatalysts to decline the energy barriers and enhance the sluggish kinetics of hydrogen evolution reaction (HER). Herein, a three-dimensional hierarchically ordered macroporous Ru-CoP@NC electrocatalyst (3DOM Ru-CoP@NC) derived from ordered macro-microporous metal–organic frameworks has been prepared using the precursor@template and double-solvent methods. The prepared 3DOM Ru-CoP@NC catalyst exhibits an overpotential of 15 mV ( j = 10 mA·cm −2 ) and a reaction Tafel slope of 38 mV·dec −1 in alkaline electrolyte, which are superior to commercial Pt@C catalyst. Additionally, the overpotential and reaction Tafel slope of this catalyst in acidic media are 45 mV and 50 mV·dec −1 , respectively. The outstanding HER activities of 3DOM Ru-CoP@NC catalysts are ascribed to the 3D highly interconnected-reticular nanospaces that can increase effective reaction active sites. The N doped carbon framework improves the electronic properties and conductivity. Moreover, the strong interaction of Ru and CoP nanoparticles also boosts the HER process. These results indicate that 3DOM Ru-CoP@NC catalysts with high catalytic activities have a broad application prospect in the future. Graphic abstract
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高影响因子
危险品化学品经营许可证（带存储）