ACS Catalysis
·
2017
·
IF 10.614
Cheng Du,Lan Yang,Fulin Yang,Gongzhen Cheng,Wei Luo
The investigation of high-efficiency nonprecious electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of great significance for renewable energy technologies. Here, we provide a successive hydrothermal, oxidation, and phosphidation method to fabricate a 3D nest-like ternary NiCoP/carbon cloth (CC) electrocatalyst with superior catalytic activity and stability toward HER/OER. Nest-like NiCoP/CC requires overpotentials of 44 and 62 mV to reach the current density of 10 mA cm–2 in acidic and alkaline media, respectively, toward HER. For OER, the NiCoP/CC exhibits high active and durable performance with an overpotential of 242 mV at current density of 10 mA cm–2 in alkaline solutions. Furthermore, the practical application of NiCoP/CC as a bifunctional catalyst for overall water splitting reaction yields current densities of 10 and 100 mA cm–2 at 1.52 and 1.77 V, respectively.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Hongfei Wu,Pengjie Liu,Mingzhu Yin,Zhuoran Hou,Liwen Hu,Jie Dang
The development of highly active and low-cost metal electrocatalysts for hydrogen evolution reaction (HER) is crucial for application of water electrolysis. In this work, a novel and facile strategy to fabricate self-supported NiCoO x /NiCoP film was proposed via a simple surface modification engineering process with in situ electrochemical oxidation directly applied to NiCoP porous film. The electrocatalytic performance of the obtained NiCoO x /NiCoP is significantly optimized after surface modification engineering. NiCoO x /NiCoP film exhibits excellent catalytic activity toward HER, which only requires an overpotential of 35 and 104 mV to reach the current density of 10 and 100 mA cm −2 in alkaline solution, respectively, while NiCoP film requires an overpotential of 66 and 140 mV at the same current density. Meanwhile, the self-supported NiCoO x /NiCoP film shows a low Tafel slope of 56 mV/dec and superior long-term stability. The HER activities of NiCoO x /NiCoP films obtained by in situ anodic oxidation with different time duration reveal that an appropriate anodic oxidation time duration is important and beneficial for achieving improved HER activity without changing the microstructure. This simple method provides a promising avenue for designing and constructing high-performance HER electrocatalysts with lower cost.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 22
·13639-13644
·
IF 4.036
Jiyu Li,Zeyan Wang,Peng Wang,Zhaoke Zheng,Yuanyuan Liu,Hefeng Cheng,Baibiao Huang
In this study, a novel NiCoP–CeO2 composite was constructed on a Ni foam by a simple hydrothermal method and thermal phosphating strategy. In the OER test, NiCoP–CeO2 exhibited a low overpotential of 217 mV at 10 mA cm−2, 45 mV dec−1 of Tafel slopes. With the help of theoretical calculations and experimental characterization, the reason for performance improvement was analyzed in depth. The results show that CeO2 leads to a confinement effect, maintaining the nanosheet morphology of NiCo-LDHs, which contributes to sustaining the catalyst in favourable contact with H2O and minimizing the OER potential. Furthermore, by loading CeO2 onto NiCoP, the hydrophilicity of the catalyst is significantly enhanced. Our work provides an ingenious synthesis strategy for the preparation of efficient and inexpensive electrocatalytic materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jianjun Zhu,Xinyu Zheng,Chenchen Liu,Yikai Lu,Yu Liu,Di Li,Deli Jiang
Designing efficient, stable, and low-cost bifunctional catalysts for overall water splitting is significant but challenging. In this work, Zn and F ions co-doped NiCoP nanoprism arrays grown directly on nickel foam (Zn/F-NiCoP/NF) was synthesized via hydrothermal method followed by phosphorization treatment. The resultant Zn/F-NiCoP/NF exhibits high electrocatalytic activity towards hydrogen evolution reaction (HER, η 10 = 59 mV) and oxygen evolution reaction (OER, η 50 = 285 mV). An alkaline electrolyzer using Zn/F-NiCoP/NF as both cathode and anode requires a low cell voltage of 1.568 V at a current density of 10 mA cm −2 with a high long-term stability of up to 40 h, which outperforms many reported Ni,Co-based catalysts. Density functional theory (DFT) calculations proof that simultaneous doping of NiCoP with Zn and F ions provides flexibility to regulate the electronic configuration and downshifts the transition metal d -band center, thereby optimizing adsorption energy between reactants and intermediates, which enhances the HER and OER catalytic activities. This work highlights that cation–anion co-doping strategy is an effective way to develop highly active transition metal phosphides electrocatalyst for 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
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xin Ye,Haodong Zhang,Fan Wu,He Ma,Shaoyang Wu,Xiangqun Zhuge,Yurong Ren,Peng Wei
Transition metal phosphides (TMPs) have drawn widespread attention as promising electrocatalysts due to their special electronic structure, good electrochemical activity, low cost, and high abundance. Although a great deal of effort has been expended in the pursuit of TMPs, the majority of synthesis processes are complex and hazardous due to the use of flammable and toxic phosphorus sources. Herein, we propose a nontoxic and scalable synthetic strategy for the synthesis of NiCoP@NC by using green and cheap diethylenetriaminepentakis (methylphosphonic acid) (DTPMP) as the phosphorus source. DTPMP can also act as a chelating agent and displays strong coordination ability with metal ions, thereby reducing particle size and forming nanoparticles. The NiCoP@NC exhibits outstanding stability and electrocatalytic activity in both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Furthermore, water electrolysis performance also is measured using NiCoP@NC as both anode and cathode, which delivers a cell voltage of 1.73 V at 10 mA·cm–2 and can operate stably for 24 h. This work not only constructs efficient bifunctional catalysts, but also broadens the green synthesis method of nanosized TMPs, paving the way for further large-scale practical applications.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Fengye Guo,Wenhua Li,Yefan Liu,Qianqiao Chen,Qin Zhong
Transition metal phosphides with excellent performance are one of the effective alternatives to noble metal catalysts in overall water splitting. In this paper, the Fe–NiCoP–MoO3 composite was prepared by a facile synthesis as the bifunctional electrocatalyst. Fe–NiCoP–MoO3 achieves an operating current density of 10 mA/cm2 at a low overpotential of 65 mV for hydrogen evolution reaction and drives an operating current density of 50 mA/cm2 at only 293 mV for oxygen evolution reaction. Significantly, Fe–NiCoP–MoO3 was employed as the anode and cathode for overall water splitting, which only requires a cell voltage of 1.586 V to reach 10 mA/cm2 as well as shows excellent stability. The electrocatalytic activity of Fe–NiCoP–MoO3 exceeds most of the recently reported typical bifunctional electrocatalysts. This may be due to the coupling effect between the polymetallic phosphides. In addition, heterogeneous catalysts generally expose more active sites than homogeneous catalysts. In addition, replacing MoO3 with WO3 and VO3 can also improve the performance of Fe–NiCoP. This work provides an idea for the modification of phosphides.
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
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7395-7402
·
IF 3.925
Qiao Huang,Yanmei Guo,Jinxi Chen,Yongbing Lou,Yixin Zhao
Lead halide perovskites have exhibited promising achievements in the field of photoelectricity and photocatalysis. However, the toxicity of Pb hampers their practical application. Herein, an environment-friendly and Pb-free double perovskite, NiCoP/Cs2AgBiBr6 (NCP/CABB) composite, was successfully synthesised for the first time via efficient electrostatic coupling. It was applied for H2 generation in an HBr solution. The NCP/CABB composite maintained a steric regular perovskite structure. The optimal 12.5% NCP/CABB composite achieved the highest H2 generation rate (373.16 μmol g−1 h−1), which was approximately 88 times higher than that of pure CABB and was even better than that of CABB/5% Pt. Additionally, the NCP/CABB composite displayed excellent photocatalytic cycling stability in 4 h cycle tests. Due to the loading of NCP nanoparticles with preeminent conductivity, the separation and transfer of photoelectrons were promoted effectively, thereby enhancing photocatalytic performance. This work highlights a feasible strategy with broad prospects for the development of Pb-free perovskite composite catalysts.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Wensha Niu,Zuoyi Xiao,Shifu Wang,Shangru Zhai,Longfei Qin,Zhenyu Zhao,Qingda An,Zhongcheng Li
Electrode materials with excellent capacitance performance remain on urgent need for energy storage devices. In this study, we successfully fabricated porous P-doped carbon-supported NiCoP nanoparticles (NiCoP@P–C) by chelating sodium alginate with Ni 2+ and Co 2+ ions and subsequently performing a high-temperature calcination process. The carbonization process involved phosphating the metal ions to form bimetallic NiCoP nanoparticles and doping the P element into the carbon framework. The as-prepared material integrated the merits of metal phosphide (high theoretical specific capacitance), bimetal (excellent electrochemical conductivity), and porous structure (rapid ion transportation). The sample consequently exhibited outstanding electrochemical properties with an ultrahigh specific capacitance of 920 F g −1 (0.5 A g −1 ) and a high cycle stability of 84% over 5000 cycles with a small mass loading of 3.6 mg cm −2 . Moreover, an asymmetric supercapacitor assembled with NiCoP@P–C-500 as the positive electrode and activated carbon as the negative electrode delivered a maximum energy density of 57.8 W h kg −1 at a power density of 522 W kg −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Weijie Yang,Kailong Sun,Jun Wan,Yang-Ai Ma,Jiaqing Liu,Bicheng Zhu,Lin Liu,Feng Fu
The insufficient generation of oxidative active species severely limits the activity of photocatalytic aerobic oxidation for organic pollutants degradation in wastewater. Herein, transition metal phosphides (TMPs) cocatalysts, including Ni 2 P, Co 2 P, and NiCoP, were loaded on Bi 4 O 5 Br 2 nanosheets by a simple liquid assembly method. Among which, 15% NiCoP/Bi 4 O 5 Br 2 heterojunction exhibits the optimal photocatalytic activity for degrading phenolic pollutants owing to the high concentration of h + and •O 2 − active species, and it displays excellent tolerance for the inorganic ions, pH value, water matrix, and outdoor sunlight. The S-scheme charge transfer mechanism was revealed for NiCoP/Bi 4 O 5 Br 2 heterojunction, which significantly improves the separation efficiency of photogenerated charge carriers and facilitates the accumulation of active h + . Furthermore, NiCoP with high reduction potential and outstanding O 2 activation ability is served as the active site for producing •O 2 − . This work can inspire the further design of bifunctional photocatalysts for efficient photocatalytic aerobic oxidation applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 29
·期 2
·721-732
·
IF 2.961
Dai Jianfeng,Li Zhaokuan,Yu Rui,Su Hao,Wang Qing
The combination of transition metal compounds and carbon materials is considered effective in optimizing electrode material performance. In this work, some simple methods are used to embed bimetallic phosphides into carbon material frameworks to form heterostructures. The process includes the in situ growth of cobalt-based zeolitic imidazole frameworks on rGO, the formation of bimetallic hydroxides by Ni 2+ etching, and further high-temperature phosphating to form a NiCoP/rGO hollow nanocomposite. Benefiting from the synergistic effect between NiCoP and rGO, NiCoP/rGO-20 exhibits the best electrochemical properties, has a high specific capacity of 250.9 mAh g −1 at a current density of 1 A g –1 , and has good rate performance (62.7% retention at 10 A g –1 ). Furthermore, a hybrid supercapacitor was assembled with NiCoP/rGO-20 as the positive electrode and activated carbon (AC) as the negative electrode. The NiCoP/rGO-20//AC HSC device has a high energy density of 60.6 Wh kg –1 at a power density of 749 W kg –1 as well as excellent cycling stability with 83.7% capacitance retention after 10,000 cycles at 10 A g –1 . This work provides a new strategy for the development of high-performance energy storage composites.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 99
·期 7
·075978
·
IF 2.6
Ning Zhong,Jean Baptiste Maniriho,Qianlin Wu,Xiaodong Wang,Yijia Gu,Wenge Li,Yuantao Zhao
This work was initiated with the purpose of expanding the utilization of nickel-based composite coatings, especially in wear and corrosion-related industrial applications. NiCoP coatings have long attracted scientific and engineering interest due to their enhanced mechanical properties reinforced by incorporation with a reinforcement phase. In the present study, NiCoP composite coatings reinforced with ZrB2 ceramic particles were synthesized by direct current deposition using a modified Watt's type bath. The microstructures of composite coatings were studied by x-ray diffraction analysis, energy dispersive x-ray spectroscopy, and scanning electron microscopy, respectively. The hardness and tribological properties of the composite coatings were evaluated and compared. The corrosion behaviors of the deposits were investigated using electrochemical spectroscopy and potentiodynamic polarization techniques in simulated seawater. The effect of ZrB2 content on the microstructures and mechanical properties of the composite coatings was explored and discussed. The present study indicates that there is a progressive enhancement in the hardness, corrosion resistance, and wear resistance of the composite coatings with the increase in ZrB2 loading. The NiCoP-12 g/l-ZrB2 coating possesses the highest microhardness and superior wear performance, while the NiCoP-6 g/l-ZrB2 coating exhibits the best anti-corrosion properties. The present study shows a cost-effective and feasible solution for the preparation of NiCoP protective coatings with enhanced properties, which holds great potential for industrial applications requiring wear and anti-corrosion protection.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xinmeng Zhang,Wenjing Liu,Peizhong Feng
Designing and constructing a low-cost, short-cycle, and high cost-effectiveness dopamine (DA) electrochemical sensor is essential for developing biomedicine and human health monitoring. In this paper, the CC/NiCoP composite was prepared by electrochemical deposition of amorphous NiCoP nanoparticles on the carbon cloth (CC) surface using cyclic voltammetry. The synthesized NiCoP was unstable when it was tested in a phosphate-buffered saline solution. The NiCoP can be used for DA detection in a neutral environment of phosphate-buffered saline solution through secondary electrochemical deposition coating poly(3,4-ethylenedioxythiophene) (PEDOT). Amorphous NiCoP lacks a long-range ordered crystal structure, and local atomic vacancies or misalignments can lead to more atomic defects. These defects provide more catalytic active sites, which can effectively participate in electrochemical reactions, making amorphous materials more active than crystalline materials. The CC/NiCoP@PEDOT composite combines the excellent properties of amorphous NiCoP, such as high catalytic activity and good stability, with the good conductivity of the three-dimensional CC substrate and the high molecular polymer PEDOT. The constructed DA electrochemical sensor based on CC/NiCoP@PEDT composite exhibits a low level of detection limit (0.12 nM), excellent stability, and immunity to interference. This study demonstrates the prospects of electrodeposition methods in the field of electrochemical sensing and provides an approach for the design and construction of high-performance electrochemical sensors.
研究领域:
生物医学
·
材料科学
·
分析化学
✓ 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）