Materials Today Chemistry
·
2022
·
IF 7.613
M. Wang,Y. Chen,T. Li
Electrocatalytic water splitting is a promising method for hydrogen production, so the development of the efficient and stable catalysts for hydrogen evolution reaction (HER) is quite important in alkaline media. In this study, cobalt-iron-nickel phosphide nanoparticles (CoFeNiP/NF) were prepared on the nickel foam substrate, where Ni 12 P 5 can be controllably generated by introducing Co dopants while only Ni 3 P was observed without adding Co. Also, the introduction of Fe and Co metals not only changed the phase of Nickel phosphide but also modified the morphology of material, which synergistically improve the HER performance. Thus, CoFeNiP/NF displays good electrocatalytic activity and durability for HER in alkaline media (1 M KOH), exhibiting a low onset overpotential of 27 mV and overpotential of 104 mV to reach the current density of 10 mA/cm 2 . The introduction of other metal ions not only changed the phase of Nickel phosphide but also modified the morphology of material, which synergistically improve the HER performance. This study not only provides a strategy for controllable preparation of nickel phosphides but also investigates structure/component design for transition metal phosphides 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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Hongyan Zhang,Tao Yang,Hao Zhou,Yikai Wang,Xuehan Yang,Wenjie Liang,Dan Wu,Pan Yuan,Tingting Yu,Maoshuai He,Wenxian Wei
Ni phosphides have recently attracted considerable attention as promising catalysts for the oxygen evolution reaction (OER) and are generally promoted by Fe incorporation. However, the catalytic performance of nickel phosphide still does not meet the desired expectations. Additionally, the catalytic activity of iron (Fe) is insignificant and can be disregarded. In this study, we used C 3 N 4 as a carbon substrate to modulate the 3 d electron configurations and adsorption properties of Ni and Fe. Density functional theory (DFT) analysis reveals that the catalytic performance of Ni sites can be enhanced by utilizing the C 3 N 4 substrate. Surprisingly, the Fe sites can also be activated to catalyze OER through a direct O 2 mechanism and the catalytic activity of Fe is found to surpass that of Ni. As a result, the FeNi-C 3 N 4 -P catalyst demonstrated remarkable catalytic performance for OER. It exhibited a Tafel slope of 40.4 mV dec −1 , an overpotential of 235 mV at 100 mA cm −2 , and exhibited exceptional stability. This study highlights the activation of Fe and the enhancement of Ni by utilizing nitrogen-containing carbon substrates. This strategy offers promising prospects for the development of efficient Ni/Fe-based OER catalysts.
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
Crystals
·
2022
·Vol. 12
·期 3
·318
·
IF 2.67
Ze Li,Jie-Ying Jing,Zhi-Qiang Qie,Wen-Ying Li
Jet fuel rich in hydroaromatics and cycloalkanes could be derived from direct coal liquefaction oil via the hydrogenation saturation process. Developing an efficient catalyst to transform naphthalene hydrocarbons to hydroaromatics and cycloalkanes with high selectivity plays a significant role in realizing the above hydrogenation saturation process. In this work, Ni2P/Al2O3catalysts were prepared at different reduction temperatures via the thermal decomposition of hypophosphite. We investigated the influence of reduction temperature and the results showed that reduction temperature had an important impact on the properties of Ni2P/Al2O3catalysts. When the reduction temperature was 400 °C, the Ni2P particle size of the Ni2P/Al2O3catalyst was 3.8 nm and its specific surface area was 170 m2/g. Furthermore, the Ni2P/Al2O3catalyst reduced at 400 °C obtained 98% naphthalene conversion and 98% decalin selectivity. The superior catalytic activity was attributed to the smaller Ni2P particle size, higher specific surface area and suitable acidity, which enhanced the adsorption of naphthalene on Ni2P/Al2O3catalyst.Keywords:nickel phosphide;reduction temperature;naphthalene hydrogenation;thermal decomposition of hypophosphite
研究领域:
催化化学
·
能源化工
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
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2011
·Vol. 21
·期 44
·17988-17997
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IF 5.101
Yi Lu,Jiang-ping Tu,Chang-dong Gu,Xiu-li Wang,Scott X. Mao
Nickel phosphide (Ni2P) hollow spheres were facilely prepared via an organic-phase strategy using nickel(II) acetylacetonate as a metal precursor, trioctylphosphine as a phosphorus source, and octyl ether as solvent. A core/shell-structured Ni2P@C nanocomposite was grown in situ by employing oleylamine and 1-octadecene as capping agent and solvent, respectively, and the hollow Ni2P spheres were homogeneously wrapped by an amorphous carbon shell. The reversible capacity of the Ni2P@C nanocomposite after 50 cycles is 435 mAh g−1 at 0.1 C and 303 mAh g−1 at 0.5 C, respectively, much higher than that of Ni2P (184.2 mAh g−1 at 0.1 C and 123 mAh g−1 at 0.5 C). These improvements are attributed to the carbon shell, which can enhance the conductivity of Ni2P, suppress the aggregation of active particles, and increase their structure stability during cycling.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wei Yan,Zhuang Shi,Hao Feng,Jinshi Yu,Wenmiao Chen,Yanli Chen
In this study, we employed a straightforward phosphorylation approach to achieve a dual objective: constructing c-a heterostructures consisting of crystalline Ni 12 P 5 and amorphous FeOOH, while simultaneously enhancing oxygen vacancies . The resulting oxygen evolution reaction (OER) catalyst, Ni 12 P 5 /FeOOH/NF, exhibited remarkable performance with current densities of 500 mA cm −2 in both 1 M KOH and 1 M KOH + seawater , requiring low overpotentials of only 288 and 365 mV, respectively. Furthermore, Ni 12 P 5 /FeOOH/NF exhibited only a slight increase in overpotential, with increments of 18 mV and 70 mV in 1 M KOH after 15 and 150 h, and 32 mV and 108 mV in 1 M KOH + seawater at 500 mA cm −2 after 15 and 150 h, respectively. This minimal change can be attributed to the stabilized c-a structure, the protective coating of Ni 12 P 5 , and superhydrophilic. Through in-situ Raman and ex-situ XPS analysis, we discovered that Ni 12 P 5 /FeOOH/NF can undergo a reconfiguration into an oxygen vacancy-rich (Fe/Ni)OOH phase during OER process. The elevated OER activity is mainly due to the contribution of the oxygen vacancy-rich (Fe/Ni)OOH phase from the reconfigure of the Ni 12 P 5 /FeOOH/NF. This finding emphasizes the critical role of oxygen vacancies in facilitating the production of O O species and overcoming the limitations associated with OOH formation, ultimately enhancing the kinetics of the OER.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Anyin Chen,Liang Fu,Wenjun Xiang,Wei Wei,Dan Liu,Changlu Liu
It is essential to search highly active, steady and cheap non-noble electrocatalyst for hydrogen evolution reaction (HER). At present, nickel phosphides are extensively used in electrochemical hydrogen evolution due to its excellent stability and activity. Hence, we report a facile, effective and feasible strategy to synthesis of Ni 5 P 4 nanosheets/nanoparticles structure on carbon cloth, which was fabricated by electroless nickel plating on carbon cloth followed via straightforward thermal phosphidation treatment with NaH 2 PO 2 as phosphorus source. The as-prepared CC@Ni–P electrocatalyst exhibits HER activity with low overpotentials (93 mV vs. RHE) to attain current density 10 mA/cm 2 as well as small Tafel slope (58.2 mV/dec), which outperforms most nickel phosphides electrocatalysts. The excellent HER performance can be ascribed to the large electrochemically active surface area, and phosphorus-rich Ni 5 P 4 phase can supply further bridges sites of Ni and P. Significantly, as-prepared CC@Ni–P catalyst electrode exhibits no apparent HER activity decay after continuous stability test. Beyond that, the approach can be readily used to fabricate large size (5 × 5 cm) nickel phosphide electrocatalyst with excellent HER performance, which may be conducive to the proton exchange membrane (PEM) water electrolyser applications in future. This work opens an effective way to construct excellent performance transition-metal phosphides for HER.
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 COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Tengfei Wu,Peifang Wang,Yanhui Ao,Chao Wang
Photocatalytic water splitting is considered to be a promising strategy for addressing the global energy crisis through the expanded use of solar energy. Herein, cadmium sulfide (CdS) nanorods modified with a thin conductive carbon layer and a nickel phosphide co-catalyst, referred to as cadmium sulfide coated with a carbon layer and nickel phosphide (CdS@C/Ni 2 P, where @ indicates a core–shell structure), were synthesized and applied as a novel composite photocatalyst for water splitting. The optimized CdS@C/Ni 2 P composite showed a high photocatalytic hydrogen generation rate of 32030 μmol h −1 g −1 , which was approximately 19 times as high as that of pure CdS. We believed that the thin carbon layer acted as an electron acceptor to promote charge transfer and protect the CdS nanorods from photocorrosion. In addition, the surface loading of the nickel phosphide (Ni 2 P) cocatalyst was able to further draw photogenerated electrons from the cadmium sulfide coated with a carbon layer (CdS@C) heterojunction and provide active sites for hydrogen evolution. Thus, greatly enhanced hydrogen generation was achieved through a combination of carbon coating and surface cocatalyst loading. This development provides a new way to design composite photocatalysts with multiple junctions for efficient water splitting performance.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Qian Ren,Huile Jin,Xue Xu,Aili Liu,Jun Li,Jichang Wang,Shun Wang
Nickel/Nickel phosphides electrodes are prepared through in-situ reduction of NiSO 4 and NaH 2 PO 2 on carbon cloth substrates using square-wave and cyclic voltammetry methods. Nickel/nickel phosphide nanospheres prepared with the pulse deposition procedure exhibits higher activity in the hydrogen evolution reaction (HER), outperforming those prepared through cyclic voltammetry approach. Scanning electron microscopy measurements indicate that pulse-deposition offers a better control on the nucleation process and the size of nanospheres, leading to the formation of nano-cracks within the spheres and creating more active sites for the HER. The as-obtained nickel/nickel phosphide/carbon cloth electrodes exhibit cathodic currents of 10 mA cm −2 at the overpotential of 164 mV in a 0.5 M H 2 SO 4 solution and the obtained Tafel plot has a slope of 76 mV dec −1 .
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 ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Jiachen Li,Shengwen Li,Jun Pu,Chenglin Zhong,Qingwen Zhou,Zihan Shen,Huigang Zhang,Haixia Ma
Fe-doped Ni 2 P nanoparticles have been fabricated on wrinkled graphene (rGO@Fe–Ni 2 P NPs) by a facile hydrothermal reaction followed by phosphorization. By adjusting the content of iron in Fe–Ni 2 P, optimal OER performance is achieved (Ni/Fe = 1.67). rGO@Fe–Ni 2 P displays pronounced alkaline OER activity with a small overpotential (260 mV vs RHE) at a current density of 10 mA cm −2 , and a low Tafel slope (35.7 mV dec −1 ) with long-term durability (17 h). The superior catalytic performance of rGO@Fe–Ni 2 P is attributed to the rational incorporation of iron into Ni 2 P, leading to a higher valence of nickel with more oxidation ability and inducing faster OER process. In addition, highly conductive graphene promotes electron transfer for oxygen generation, improves the stability of the catalyst, and provides more active sites facilitating the OER process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yuwei Ma,Guangtong Hai,Juming Liu,Jinxiao Bao,Yan Li,Ge Wang
Ni-doped cadmium sulfide (CdS) nanospheres with nickel phosphide (Ni 2 P) loading (Ni 2 P@CdS-Ni) were successfully prepared via the two-step thermal treatment growth and chemical reduction method in this work. Firstly, the thermal treatment method was applied to introduce the Ni 2+ into the lattice of CdS and induce the Ni-precursor loaded on surface of the CdS intimately. Then, the Ni-precursor was reduced into Ni(OH) 2 by using the chemical reduction process. Furthermore, the Ni 2 P were loaded on the CdS via the second thermal phosphorization reaction. The loaded Ni 2 P would evidently accelerate the transfer of photo-generated electrons between CdS-Ni and Ni 2 P and meanwhile effectively decrease the charges recombination. Moreover, the results of UV–vis DR spectra and density functional theory (DFT) calculations confirmed that Ni cations doped in the lattice of CdS lead to a doping level at the bottom of the conduct band, which narrowed the bandgap. The work function indicated that doped Ni 2+ helps to enhance the migration and separation of the photo-induced charge. Based on the synergistic effects, 3.7% Ni 2 P@CdS-Ni-3 presented a relatively high hydrogen evolution rate of 176.6 mmol h −1 g −1 under visible light irradiation (λ ≥ 420 nm), which is 63 times of the common CdS.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiaoyan Wang,Ying Xie,Wei Zhou,Xiuwen Wang,Zhicheng Cai,Zipeng Xing,Mingxia Li,Kai Pan
The hierarchical electrocatalysts with the superaerophobic property are in favor of removal of gas bubbles and supply of numerous active sites to improve the electrochemical catalytic activity for water splitting. In this work, the self-supported Zn-doped CoNiP (Zn–CoNiP/NF) hierarchical structure that consisted of nanothorns and radial microspheres were prepared with via a facile precursor phosphorization method. Zn-doping could tailor the initial electronic state of CoNiP to improve the hydrogen or oxygen atom binding, which effectively promoted the catalytic kinetics of water splitting. The hierarchical structure not only offered more catalytic active sites for water splitting, but also facilitated gas releasing due to the superaerophobic interface. The hierarchical Zn–CoNiP structure showed a high hydrogen evolution reaction (HER) efficiency in electrolytes with pH 0–14, which yielded low overpotentials of 73 mV in acidic solution and 34 mV in alkaline media at current density of 10 mA cm −2 . Furthermore, it also had evidenced by an overpotential of 310 mV for oxygen evolution reaction (OER) at the current density of 50 mA cm −2 . Note that the required cell initial voltage was 1.51 V for overall water splitting. These results were comparable or even better than many non-noble catalysts.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 25
·15272-15277
·
IF 3.108
Yunhua Li,Juan Fu,Binghui Chen
Ni2P supported catalysts have extensively been studied for various hydrodeoxygenation (HDO) reactions. However, the main products are cyclohexane or cyclohexanol for lignin-derived compounds HDO over these catalysts. In this study, we investigate the catalytic conversion of anisole, phenol and guaiacol to benzene over Ni2P/SiO2 by probing the reaction conditions. The results show that a lower reaction temperature and higher H2 pressure favour the hydrogenation of these model chemicals to cyclohexane, whereas a higher reaction temperature and lower H2 pressure aid the generation of benzene. The cyclohexane and benzene yields are 89.8% and 96.0% at 1.5 MPa and 573 K and 0.5 MPa and 673 K, respectively. By eliminating the influence of internal and external diffusion, the low intrinsic activation energy of 58.2 kJ mol−1 is obtained, which explains the high catalytic activity. In addition, although guaiacol HDO has a low conversion due to the space steric effect of its substituents, it presents a similar reaction pathway to obtain anisole and phenol, which is dependent on reaction conditions. The long-run evaluation experiment shows that the activity and selectivity of anisole HDO to benzene changes slightly for 36 h.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）