RSC Advances
·
2015
·Vol. 5
·期 98
·80388-80396
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IF 3.84
Yunhua Li,Xin Yang,Linhui Zhu,Hua Zhang,Binghui Chen
This study investigates phenol hydrodeoxygenation on supported Ni2P, prepared via the sol–gel and TPR methods, and noble metal (Pd, Pt and Ru)–Ni2P catalysts, prepared from Ni2P by the partial in situ reduction of a noble metal precursor. 10% Ni2P/SiO2 had a relatively uniform distribution of Ni2P nanoparticles and a highly active activity for phenol hydrodeoxygenation. Phenol conversion increased with increasing reaction temperature and the main products on noble metal–Ni2P/SiO2 also changed from cyclohexanol at 453 K to cyclohexane at 493 K. In comparison with supported Ni2P or noble metal catalysts and their physical mixture, Pd–Ni2P/SiO2 presented the highest conversion activity and cyclohexane selectivity. Physicochemical characterization showed that the number of active sites on the catalysts increased and electron transfer occurred from Ni2P to the noble metal due to the intimate contact between Ni2P and the noble metal. A synergistic effect of the deoxygenation and carbonyl hydrogenation from Ni2P and the hydrodeoxygenation from Pd resulted in an improvement of the catalytic activity and differences in the selectivity of the catalysts.
研究领域:
催化化学
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能源化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Kun Xiong,Linjian Yu,Yang Xiang,Haidong Zhang,Jia Chen,Yuan Gao
Hydrogen production from water splitting is a green and efficient technology for storing clean energy. Herein, cerium-incorporated Ni 2 P nanosheets are designed as trifunctional electrocatalysts to generate hydrogen by hydrothermal self-oxidation of surface nickel foam (NF) in pure water to in-situ form Ni(OH) 2 nanosheets , followed by incorporation of Ce and phosphorization. The prepared material exhibits excellent electrocatalytic performance in hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and urea oxidation reaction (UOR). When the current density is 100 mA cm −2 , the UOR potential of Ce-Ni 2 P is 1.473 V lower than that in the OER (1.731 V), suggesting a great potential to replace the sluggish OER for overall water splitting. Moreover, the Ce-Ni 2 P/NF can be applied to the electrochemical treatment of real urine electrolysis with similar performance to the urea electrolysis. Such remarkable performance is attributed to the incroporation of Ce with "Ce 3+ /Ce 4+ redox pairs", which can not only provide abundant reactive sites by the charge transfer appearance of defect sites, but also offer an effective buffering space for the pre-oxidation process from Ni 2+ to Ni 3+ . It is thus beneficial for overall water splitting and coupled urea electrolysis, providing a promising candidate for urine wastewater treatment and clean energy production.
研究领域:
材料科学
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能源科学
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电化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Zhuwang Shao,Xiao Meng,Hong Lai,Dafeng Zhang,Xipeng Pu,Changhua Su,Hong Li,Xiaozhen Ren,Yanling Geng
In this study, Ni 2 P-Cd 0.9 Zn 0.1 S (NPCZS) composites were synthesized by coupling tetrapod bundle Cd 0.9 Zn 0.1 S (CZS) and coralline-like Ni 2 P (NP) via a simple calcination method. CZS shows outstanding activity in photocatalytic hydrogen evolution (1.31 mmol h −1 ), owing to its unique morphology and heterophase homojunctions (ZB/WZ), which accelerate the separation and transfer of photogenerated charges. After coupling with NP, the photoactivity of NPCZS was enhanced, and the maximum hydrogen evolution rate of 1.88 mmol h −1 was reached at a NP content of 12 wt%, which was 1.43 times higher than that of pure CZS. The experimental results of the photocatalytic activity, viz. photoluminescence spectra, surface photovoltage spectra, and electrochemical test showed that the enhanced photoactivity of NPCZS should be attributed to the synergistic effects of the novel tetrapod-bundle morphology, heterophase homojunctions, and decoration of the NP co-catalyst. Moreover, the as-prepared NPCZS composites exhibited excellent photostability and recyclability. Herein, we propose a possible mechanism for the enhanced photocatalytic activity.
研究领域:
材料科学
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能源化学
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光催化技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Neng Chen,Sai Che,Hongchen Liu,Guohua Li,Na Ta,Feng Jiang Chen,Bo Jiang,Ni Wu,Zhengxuan Li,Weiqi Yu,Fan Yang,Yongfeng Li
The regulation of the multi-dimensional interface plays an important role in optimizing the electron transport and gas mass transfer during catalysis, which is conducive to promoting the electrocatalytic process. Herein, a self-supporting electrode has been developed with the multistage interface within 3D Ni 2 P@C nanospheres/nanoflowers arrays derived from metal-organic frameworks (MOFs) as template skeletons and precursors. The constructed nanosphere interface protrudes outward to optimize the contact with the electrolyte while the nanoflower lamellar connection promotes rapid electron transfer and exposes more active sites, and accelerates the gas diffusion with the abundant interspace channels. According to theoretical calculation, the synergistic effect between Ni 2 P and C is conducive to the optimal adsorption and desorption of H*, thus contributing to the improvement of catalytic kinetics. With the optimized growth times assembled onto nickel foam substrates, the Ni 2 P@C-12 h requires overpotentials of only 69 mV and 205 mV to drive the current density of 10 mA cm −2 towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. And it reveals an ultralow cell voltage of 1.55 V at 10 mA cm −2 to achieve overall water splitting (OWS). In addition, the stability of the Ni 2 P@C/NF electrocatalyst emerges as prominent long-term stability, which is attributed to the carbonaceous nanosphere anchors on the substrate to minimize the possibility of oxidation of the catalyst surface. This strategy of in situ growth of MOF-derived phosphates provides a general idea for interfacial engineering modification of OWS electrode materials.
研究领域:
材料科学
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电化学
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催化工程
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产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Zhichao Jia,Na Ji,Xinyong Diao,Xinxin Li,Yujun Zhao,Xuebin Lu,Qingling Liu,Caixia Liu,Guanyi Chen,Longlong Ma,Shurong Wang,Chunfeng Song,Changzhi Li
A strategy for low-temperature synthesis of hydrotalcite-based nickel phosphide catalysts (Ni2P-Al2O3) with flower-like porous structures was proposed. The in situ reduction of red phosphorus at 500 °C enables Ni2P catalysts with small particle size and abundant active and acidic sites, which facilitate the activation of substrates and H2. In the hydrodeoxygenation of guaiacol, a 100% conversion and 94.5% yield of cyclohexane were obtained over the Ni2P-Al2O3 catalyst under 5 MPa H2 at 250 °C for 3 h. Other lignin-derived phenolic compounds could also afford the corresponding alkanes with yields higher than 85%. Moreover, Ni2P-Al2O3 exhibited high hydrodeoxygenation activity in the deconstruction of more complex wood structures, including lignin oil and real lignin. Among the two different types of Ni sites of Ni(1) and Ni(2) in Ni2P, density functional theory (DFT) calculations showed that the Ni(2) site, highly exposed on the Ni2P-Al2O3 surface, possesses a stronger ability to break C–OH bonds during the hydrodeoxygenation of guaiacol in comparison with the Ni(1) site.
研究领域:
催化化学
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能源化学
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7675-7681
·
IF 3.925
Yanxia Wu,Xiangping Chen,Lirong Su,Qingtao Wang,Shufang Ren
Hydrogen energy is considered to be one of the ideal clean energies to replace fossil fuels because of its high energy density, renewability and environmental friendliness. The design and development of efficient, stable and low-cost hydrogen evolution reaction (HER) electrocatalysts is the key to driving the industrialization of hydrogen production technology from electrochemical water splitting. In this work, sulfur-doped Ni2P (S-Ni2P) electrocatalysts with a porous structure were synthesized by simple one-step hydrothermal reaction. The composition, structure, morphology and HER properties of S-Ni2P materials were regulated by adjusting the amount of sulfur doping. The results show that S-Ni2P catalysts display a better HER catalytic performance than pure Ni2P in acidic and alkaline electrolytes. Sulfur doping can significantly improve the catalytic activity of Ni2P. With the increase of content of doped sulfur, the HER performance of S-Ni2P materials is gradually improved. When the content of doped sulfur is 10%, the overpotentials of S10%-Ni2P in 0.5 M H2SO4 and 1 M KOH are 290 and 331 mV at 10 mA cm−2 with the Tafel slope of 67.1 and 104.1 mV dec−1, respectively, exhibiting the best HER catalytic activity among all S-Ni2P materials. This is mainly due to the unique porous structure of S-Ni2P, which can provide more catalytic active sites. At the same time, sulfur doping can adjust the electronic structure of Ni2P so as to improve the intrinsic activity of the materials.
研究领域:
材料科学
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电化学
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能源材料
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催化
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 47
·21710-21720
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IF 3.5
Yu Tianrui,Zhang Yuhong,Zhou Jiaqi,Feng Mingxin,Zhang Zewu,Zhou Yuming
Efficient, stable, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) are crucial for advancing large-scale water electrolysis for hydrogen production. In this study, we present a novel electrocatalyst featuring FeNi/Ni 2 P nanoparticles encapsulated in nitrogen-doped porous carbon (FeNi/Ni 2 P@NC). The catalyst was prepared by pyrolyzing low-cost anion exchange resin (AER) loaded with non-precious metal salts, followed by phosphidation. The FeNi/Ni 2 P@NC catalyst benefits from the synergistic effects of the FeNi alloy, Ni 2 P phosphide, and N-doped porous carbon, which together enhance the number of active sites available for the OER. The large surface area of the material optimizes both electron transfer and mass diffusion pathways, leading to remarkable OER performance. At a current density of 10 mA cm −2 , FeNi/Ni 2 P@NC demonstrates an overpotential of 323 mV and a Tafel slope of 60.3 mV dec −1 , significantly outperforming the Tafel slope of 89.3 mV dec −1 observed for the precious metal RuO 2 . Furthermore, the carbon shell layer effectively mitigates nanoparticle corrosion, thereby improving the long-term stability of the catalyst. This study presents a novel approach for developing efficient, stable, and cost-effective carbon-based catalysts for water electrolysis. Graphical abstract
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Taiping Hu,Kai Dai,Jinfeng Zhang,Shifu Chen
Step-scheme (S-scheme) photocatalytic system has been considered as an effective method for solar energy conversion by utilizing broadband solar energy, realizing easy separation of photoexcited carriers and strong redox ability. Herein, the novel ternary Ni 2 P cocatalysted two-dimensional (2D)/2D SnNb 2 O 6 /CdS-diethylenetriamine (SNO/CdS-D) system was designed and fabricated. The S-scheme SNO/CdS-D heterostructure gives photocatalytic hydrogen production of 7808 μmol g −1 h −1 , which is about 130.13 and 2.35 times stronger than that of SNO and CdS-D. Further, noble-metal-free Ni 2 P cocatalyst is decorated into SNO/CdS-D heterostructure, the photocatalytic hydrogen evolution performance could be enhanced to 11,992 μmol g −1 h −1 . Additionally, XPS analysis and DFT calculation revealed the carriers moves from CdS-D to SNO and then to Ni 2 P in the Ni 2 P-SNO/CdS-D nanocomposite. This work will give a reliable and clear insight into the interface and surface design of the 2D catalysts and offer a broadband photocatalytic hydrogen evolution process without noble metal cocatalysts.
研究领域:
材料科学
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能源化学
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光催化
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Kai Liu,Zizai Ma,Jinping Li,Xiaoguang Wang
In this paper, N-doped Ni 2 P (N-Ni 2 P) as a catalyst for hydrogen evolution was proposed. Firstly, the feasibility of N atom doping was calculated by density functional theory (DFT). Ni top site, Ni bridge site, Ni hollow site and P top site were calculated for Ni 2 P (001) and N-Ni 2 P (001). The results confirm that N atom doping can make the Gibbs free energy (ΔG H∗ ) closer to thermal neutrality (ΔG H∗ = 0) and move the d -band center away from Fermi level . Besides, charge density difference pattern and bader charge indicate N atom doping regulate the charge structure of the catalyst surface . Based on the guidance of DFT calculation results, Ni 2 P and N-Ni 2 P catalysts were also experimentally synthesized. It is revealed that the N-Ni 2 P can achieve cathodic current densities of 10 mA cm −2 and 100 mA cm −2 at overpotentials of 110 mV and 302 mV in 1.0 M KOH and 82 mV and 235 mV in 0.5 M H 2 SO 4 , respectively. This work shows that it is feasible to increase HER performance by modifying Ni 2 P catalyst with N doping .
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shuang Li,Yubao Li,Wenqing Yin,Kang Su,Ping He,Jiufu Chen,Yujun Si,Yao Xiao,Tongyan Ren
To enhance the activity of photocatalysts , it is crucial to use non-noble metal as a cocatalyst instead of noble metal in the arena of photocatalysis . In this study, to boost the photocatalytic hydrogen activity of pristine Zn 2 In 2 S 5 , XNi 2 P/ZIS 5 composite photocatalysts were prepared using noble-metal-free Ni 2 P as cocatalyst. Before photocatalytic hydrogen production experiments, the physicochemical properties of the synthesized materials were systematically characterized by advanced characterization methods. The experiment results demonstrate that the load of Ni 2 P cocatalyst can noticeably enhances the photocatalytic performance of Zn 2 In 2 S 5 and the photocatalytic hydrogen generation activities are observably influenced by the mass ratio of Ni 2 P to Zn 2 In 2 S 5 . Among XNi 2 P/ZIS 5 , the 10Ni 2 P/ZIS 5 sample presents the optimal hydrogen production rate of 17.74 mmol g −1 h −1 , which is 7.58 times as high as that of pristine Zn 2 In 2 S 5 . The increased photocatalytic hydrogen evolution activity could be attributed to the introduction of noble-metal-free cocatalyst Ni 2 P, which serves as an electronic collector and reduction sites remarkably facilitates the separation and migration of photoexcited electrons of Zn 2 In 2 S 5 . Meanwhile, the rate of reactions is significantly accelerated.
研究领域:
材料科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2025
·
IF 3.9
Tianjiao Ling,Fan Lv,Ruiqi Guo,Yi Cao,Mingzhi Zhang,Huihua Wang,JinXin Chen,Huaqing Li,Hao Ren,Guangcheng Li,Hongwei Li,Minqi Sheng
The design of bifunctional catalytic electrodes with high performance and low cost is the key to improving hydrogen production efficiency by water splitting. However, achieving the coexistence of high activity and stability of catalytic materials still faces challenges. Herein, we designed and prepared a self-supported electrode material (Ni₂P/NiSe@CNTs/CC) through the combined action of metal-catalyzed carbon nanotube (CNTs) growth, selenization, and phosphating. In this process, CNTs are grown in situ on the carbon cloth (CC) surface, and the inner cavity is filled with heterogeneous Ni₂P/NiSe nanoparticles. The optimized Ni₂P/NiSe@CNTs/CC electrode demonstrates an overpotential of 116.2 mV at -10 mA cm-² for hydrogen evolution reaction (HER) and 332.4 mV at 50 mA cm-² for oxygen evolution reaction (OER) in 1.0 M KOH electrolyte, respectively. Accordingly, the Ni₂P/NiSe@CNTs/CC||Ni₂P/NiSe@CNTs/CC couple achieves efficient water splitting with a cell voltage of 1.67 V at 10 mA cm-² and 2.01 V at 50 mA cm-², respectively. Moreover, Ni₂P/NiSe@CNTs/CC||Ni₂P/NiSe@CNTs/CC couple only decays by 0.5% after 100 hours of continuous operation at 10 mA cm-², indicating that it has considerable stability. Dynamic bubble monitoring results display that the Ni₂P/NiSe@CNTs/CC electrode/ electrolyte interface has a strong bubble escape capability, which promotes the cyclic service of the catalytic active sites.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Yanxin Bai,Xiang Gong,Na Ye,Xiaoying Qi,Zhao Jiang,Tao Fang
To facilitate the electrocatalytic behavior of Direct Ethanol Fuel Cells (DEFCs), a sequence of bimetallic Pd x Cu y /Ni 2 P-C catalysts are synthesized via the microwave-assisted ethylene glycol reduction method. The results indicate that our designed Pd 2 Cu/Ni 2 P-C(1:1) catalyst owns high activity (3974.08 mA mg −1 Pd ), 8.3 times higher than the commercial Pd/C. The durability and the CO tolerance of the corresponding catalysts are also investigated by chronoamperometry (CA) and CO stripping measurements, implying Pd 2 Cu/Ni 2 P-C(1:1) shows good durability and the anti-CO poisoning ability for EOR in alkaline media . The electrochemical impedance spectra (EIS) analysis reveals lower charge transfer resistance for Pd 2 Cu/Ni 2 P-C(1:1). Combined with the results of XRD , HRTEM , XPS and electrochemical measurements, we found that the good electrocatalytic activity , CO tolerance and long-term durability of Pd 2 Cu/Ni 2 P-C(1:1) may be provided by the electronic and strain effect among Pd, Cu and Ni 2 P, which will bring the downshift in the d-band center of catalysts and the weakened adsorption of intermediates.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）