KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2024
·Vol. 41
·期 6
·1665-1678
·
IF 2.9
Liu Yanyan,Wang Zhiheng,Li Xin,Gao Ruiyao,Sun Jiong,Liu Jiankun,Yao Songdong
To investigate the potential utilization of MOF templates in hydrodesulfurization (HDS) of large sulfur-containing compounds, MOF-derived Ni 2 P was prepared and characterized by XRD, TG, SEM, TEM, XPS and Raman. The findings indicate that MOF-derived Ni 2 P catalyst exhibits significantly enhanced Hydrodesulfurization (HDS) activity compared to conventional unsupported Ni 2 P. A modified pyrolysis and phosphiding condition allowed the stacking of central Ni atoms to be aggregated loosely, and morphology of MOF-derived Ni 2 P can be controllably transmitted from polyhedral to petal-like. A lower pyrolysis temperature tends to reduce density of Ni aggregates and cluster size of Ni 2 P(111), thereby facilitating the phosphiding of Ni aggregates and enhancing the catalytic activity of MOF-derived Ni 2 P in HDS process. Increasing the duration time of pyrolysis at lower temperatures does not accelerate the aggregation of particles, but makes petals on surface of MOF-derived Ni become thinner and eventually disappear, until coral-like nanosphere aggregates with uniform size are formed. The gradually elimination of MOF framework renders nickel aggregates more susceptible to phosphiding. The collapse of pore structure of MOF template can impact HDS activity of MOF-derived Ni 2 P. Prolonging pyrolysis time causes the spacing between Ni 2 P clusters to diminish, thereby significantly decreasing reactivity of Ni 2 P-400-4-275 compared to Ni 2 P-400-2-275 in DBT–HDS.
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
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 4
·1-10
·
IF 2.02
Zhao Qi,Han Yang,Huang Xiang,Dai Jinhui,Tian Jintao,Zhu Zhibin,Yue Li
Nanosized nickel phosphide (Ni 2 P) has been synthesized via hydrothermal reaction with environmental-friendly red phosphorus and nickel chloride. The reaction mechanism has been studied by measurement techniques of IC, XRD ,TEM, EDS, and XPS. The results showed that the particle sizes of as-prepared Ni 2 P are in nanoscale ranging from 10 to 30 nm. In hydrothermal reaction, red phosphorus reacts with water to its oxyacids, especially its hypophosphorous acid (or hypophosphite) which can reduce nickel chloride to nickel, and then metallic nickel will penetrate into the rest of red phosphorus to generate nano-Ni 2 P. Furthermore, the catalytic performance of as-synthesized Ni 2 P for the hydrodesulfurization of dibenzothiophene has been tested. It has been shown that the HDS reaction process over Ni 2 P catalyst agrees well with the pseudo-first order kinetic equation, and the HDS conversion can reach up to 43.83% in 5 h with a stable increasing catalytic activity during the whole examination process.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Muhammad Asim,Alibek Kurbanov,Bushra Maryam,Muhammad Ajmal,Chenxiang Shi,Lun Pan,Ji-Jun Zou
Incorporating g-C 3 N 4 with transition metal phosphides is emerging as a low-cost and robust co-catalyst for hydrogen evolution . The ammonia borane hydrolysis is an efficient method to release H 2 at ambient conditions in the presence of a catalyst. An efficient and cheap catalyst is needed for practical application to achieve this benchmark. For this purpose, a catalyst Ni 2 P/C 3 N 4 is synthesized by hydrothermal method and low-temperature phosphidation. The optimization reveals that the Ni 2 P/C 3 N 4 with 6.5% Ni contents shows the best performance for H 2 release. Furthermore, 2% Pt nanoparticles loading over Ni 2 P/C 3 N 4 boosts the charge transfer and improves activity 5.7-fold compared to Ni 2 P/C 3 N 4 , and the Pt-loaded catalyst is depicted as Pt@Ni 2 P/C 3 N 4 . The reaction kinetics reveals that the hydrogen evolution rate accelerates by increasing the amount of Pt@Ni 2 P/C 3 N 4 and AB concentration, and the loading of Pt nanoparticles loaded over Ni 2 P/C 3 N 4 reduces the activation energy significantly. Moreover, the ionic interaction between Pt and Ni 2 P/C 3 N 4 generates Ptᵟ + and (Ni 2 P/C 3 N 4 )ᵟ − active sites which facilitates B–H cleavage and O–H bonds of ammonia borane and water, respectively. Incorporating transition metals phosphide and noble metals supported over g-C 3 N 4 paves the pathway toward the efficient H 2 evolution from ammonia borane, bringing cost-effective modifications to synthesize constructive catalysts.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Peiman Xu,Lijun Qiu,Licheng Wei,Yiyi Liu,Dingsheng Yuan,Yi Wang,Panagiotis Tsiakaras
The efficient design of highly active, economical and stable electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline electrolyte still remains a great challenge. Herein, Mn doped Ni 2 P microflowers with porous feature directly grown on Ni foam have been successfully synthesized via a facile hydrothermal method and phosphorization treatment. By detailed analyzing X-ray photoelectron spectroscopy results, it can be found that the electronic structure of Ni 2 P can be efficiently regulated by Mn doping. As expected, the Mn-doped Ni 2 P microflowers with an optimal Mn/Ni ratio of 0.053 exhibit a low overpotential of 205 mV for HER and 330 mV for OER to achieve a current density of 100 mA cm −2 in 1.0 M KOH solution. Furthermore, when this electrocatalyst is adopted as both the cathode and anode for overall water splitting, a current density of 10 mA cm -2 is achieved at a cell voltage as low as 1.58 V, accompanied with high stability.
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
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jing Peng,Yucheng Wu,Ning Long,Wei Shen,Yimin Jiang,Rongxing He,Ming Li
Designing efficient non-precious-metal bifunctional electrocatalysts is still challenging at present. Herein, the efficient Ce,F-Ni 2 P/CoP electrocatalyst for water splitting was successfully fabricated. As shown from the present investigation, the codoping of Ce and F in Ni 2 P/CoP induced the f-p-d gradient orbital coupling in the Ce-F-metal structural unit of the catalyst, significantly reducing the work function of the catalyst, which accelerated the reaction kinetics and improved the intrinsic catalytic activity. The catalyst exhibited the outstanding hydrogen evolution reaction (HER) activity in the full pH range and, especially in alkaline electrolyte, an ultra-low oxygen evolution reaction (OER) overpotential of 243 mV at 50 mA·cm −2 and an excellent HER overpotential of 88 mV at 10 mA·cm −2 were achieved. Moreover, Ce,F-Ni 2 P/CoP displayed an excellent overall water splitting (OWS) performance with η 10 = 1.52 V. DFT theoretical calculations also showed that the gradient orbital coupling resulted in the reduction of the work function of the catalyst. Our work provides a new understanding of designing and constructing high-performance 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
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Yiyang Bi,Guangqi Wang,Jiabo Wang,Qun Liu,Yu Zhang
Intrinsic charge carrier recombination, narrow visible light absorption and poor durability restrain the photoactivity for solar-to-H 2 production. Here, noble-metal-free binary co-catalyst Ni 2 P–Ni 2 P 4 O 12 was synthesized by a simple one-step thermal phosphorylation method for enhancing CdS nanowires in visible-light-driven hydrogen generation, where the CdS nanowires are uniformly dispersed on the surface of Ni 2 P–Ni 2 P 4 O 12 through in-situ solvothermal strategy. The photocatalytic hydrogen production rate of 5 wt% Ni 2 P–Ni 2 P 4 O 12 /CdS nanowires can reach 5093 μmol g −1 h −1 using Na 2 S–Na 2 SO 3 as sacrificial agent under the irradiation of visible light (λ > 420 nm), which is about 16 times for CdS nanowires (316 μmol g −1 h −1 ). In the cycling experiments, the composite catalyst shows good stability and the hydrogen production rate remains about 83% of the initial value. The interface structure construction between CdS nanowires and Ni 2 P–Ni 2 P 4 O 12 result in the excellent photocatalytic activity , broaded visible light absorption and stability. Specifically, Ni 2 P–Ni 2 P 4 O 12 can effectively promote the separation of electron hole pairs in space, in which Ni 2 P 4 O 12 can accept H + ions and Ni 2 P can reduce the over potential of H + reduction, resulting in the synergically promotion in the photocatalytic activity. The cost-effective ternary photocatalyst exhibits great potential for sustainable and high-efficiency photocatalytic water splitting, and Ni 2 P–Ni 2 P 4 O 12 may be suitable to modify a wider variety of semiconductor photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yushun Wang,Xinzheng Zhang,Yuquan Yang,Huichao Wang,Woon-Ming Lau,Chenjing Wang,Zhongheng Fu,Dawei Pang,Qian Wang,Jinlong Zheng
The single atom catalysts (SACs) show immense promise as catalytic materials. By doping the single atoms (SAs) of precious metals onto substrates, the atomic utilization of these metals can be maximized, thereby reducing catalyst costs. The electronic structure of precious metal SAs is significantly influenced by compositions of doped substrates. Therefore, optimizing the electronic structure through appropriate doping of substrates can further enhance catalytic activity. Here, Pt single atoms (Pt SAs) are doped onto transition metal sulfide substrate NiS 2 (Pt SAs-NiS 2 ) and phosphide substrate Ni 2 P (Pt SAs-Ni 2 P) to design and prepare catalysts. Compared to the Pt SAs-NiS 2 catalyst, the Pt SAs-Ni 2 P catalyst exhibits better hydrogen evolution catalytic performance and stability. Under 1 M KOH conditions, the hydrogen evolution mass activity current density of the Pt SAs-Ni 2 P catalyst reaches 0.225 A mg Pt –1 at 50 mV, which is 33 times higher than that of commercial Pt/C catalysts. It requires only 44.9 mV to achieve a current density of 10 mA cm −2 . In contrast, for the Pt SAs-NiS 2 catalyst, the hydrogen evolution mass activity current density is 0.178 A mg Pt –1 , requiring 77.8 mV to achieve a current density of 10 mA cm −2 . Theoretical calculations indicate that in Pt SAs-Ni 2 P, the interaction between Pt SAs and the Ni 2 P substrate causes the Pt d-band center to shift downward, enhancing the H 2 O desorption and providing optimal H binding sites. Additionally, the hollow octahedral morphology of Ni 2 P provides a larger surface area, exposing more reactive sites and improving reaction kinetics. This study presents an effective pathway for preparing high-performance hydrogen evolution electrocatalysts by selecting appropriate doped substrates to control the electronic structure of Pt SAs.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 15
·4562-4568
·
IF 7
Chu-Xuan Liu,Rui Shi,Wangjing Ma,Fulai Liu,Yong Chen
The recycling of plastic waste has attracted increasing attention because of its negative effects on the ecological environment and human health. Photoreforming is emerging as a green and promising approach for upcycling plastic waste into highly valuable chemicals and H2 fuels. Herein, an earth-abundant Ni2P/ZnIn2S4 catalyst prepared by mechanical grinding is reported to selectively photoreform various polyester plastics into high-added-value chemicals coupled with H2 evolution under mild conditions. In particular, polylactic acid (PLA) can be upcycled to pyruvic acid (PA) with high activity (745.9 μmol g−1 h−1) and selectivity (>90%). Moreover, the H2 evolution rate can reach up to 781.3 μmol g−1 h−1 catalyzed by 7.5 wt% Ni2P/ZnIn2S4. This system exhibits excellent photocatalytic performance, benefiting from efficient photogenerated charge carrier separation and transfer between Ni2P and ZnIn2S4. This study provides a viable and promising solution for simultaneously producing high-purity H2 and added-value chemicals from polyester plastic waste, demonstrating its potential for practical recycling applications.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 3
·911-920
·
IF 2.936
Geng Yanyan,Lang Man,Li Guotai,Yin Wang,Yang Zhensheng,Li Hao
Developing efficient catalysts for biomass hydrodeoxygenation into high-quality biofuels and chemicals is a current topic of great interest. In this study, Ni 2 P catalysts supported on different zeolites (MCM-41, HY, Hβ) were fabricated for vanillin hydrodeoxygenation by one-pot method instead of temperature-programmed reduction (TPR). The prepared catalysts were characterized using XRD, XPS, NH 3 -TPD and N 2 physisorption. The results showed that the support has a significant influence on the reactivity of the Ni 2 P-based catalyst. The Ni 2 P/HY catalyst contains a higher acid site density, which leads to the almost complete conversion of vanillin to the quantitative yield of 2-methoxy-4-methylphenol (MMP) via direct hydrogenolysis path at 220 °C, 5 h and 2 MPa of H 2 . Graphical Abstract
研究领域:
催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Bo Xu,Xiaodong Yang,Qiang Fang,Linbing Du,Yan Fu,Yiqiang Sun,Qisheng Liu,Qingquan Lin,Cuncheng Li
Developing of high-performance and low-cost electrocatalysts is of great significance to reduce the overpotential and accelerated the reaction rate of oxygen evolution in water splitting and related energy conversion applications. Herein, Fe, O-dual doped Ni 2 P (Fe, O Ni 2 P) nanoarray is successfully synthesized on carbon cloth demonstrating enhanced electrocatalytic activity and stability for oxygen evolution reaction (OER) under alkaline media . The as-synthesized Fe, O Ni 2 P nanoarray exhibits obviously improved OER performance with a low overpotential of 210 mV at 10 mA cm −2 current density and a Tafel slope of 48 mV dec −1 , as well as long-term durability. The strong coupling interaction induced changes in electronic structure lead to relatively higher oxidation state and stronger oxidation ability of the Fe, O Ni 2 P nanoarray, together with the high electrochemical surface area and good conductivity contribute to the superior OER performance. This work highlights the anion-cation dual doping strategy may be an effective method for fabrication of catalysts relating to energy conversion applications.
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
·
2019
·
IF 14.229
Caichi Liu,Tao Gong,Jun Zhang,Xuerong Zheng,Jing Mao,Hui Liu,Ying Li,Qiuyan Hao
Developing earth-abundant transition-metal phosphides electrocatalysts with high activity and good durability toward alkaline hydrogen evolution reaction (HER) is crucial for sustainable hydrogen energy economy. However, their intrinsic activity is limited by the inadequate hydrogen adsorption energy. Herein, we reported a novel self-supported heterostructure catalyst in the form of Ni 2 P-NiSe 2 , which is obtained by phosphorization of NiSe 2 nanosheet arrays grown on the carbon cloth. The heterostructure catalyst exhibits excellent HER performance in 1 M KOH, only requiring an overpotential of 66 mV at a current density of 10 mA cm −2 with a Tafel slope of 72.6 mV dec -1 and showing excellent long-term durability. The experimental and theoretical calculation results demonstrate the strongly electronic interaction between Ni 2 P and NiSe 2 , resulting in the optimized Gibbs free energy of hydrogen and water adsorption. This work concerning the regulation of electronic structure through interface engineering may offer a deep insight to explore superior catalysts.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Enzhou Liu,Chenyang Jin,Chenhui Xu,Jun Fan,Xiaoyun Hu
Transition metal phosphides are considered as the most prospective replacements for noble metal cocatalysts used for H 2 evolution during photocatalytic water splitting. In this work, Ni 2 P/g-C 3 N 4 composite photocatalyst was synthesized using a simple in-situ hydrothermal method by one step. Benefiting from the excellent light trapping, efficient transfer of charge carriers and strong stability of Ni 2 P nanoparticles , as well as the stable interface contact between Ni 2 P and g-C 3 N 4 , the Ni 2 P/g-C 3 N 4 exhibit greatly enhanced H 2 evolution performance during photocatalytic water splitting . The optimized H 2 evolution rate can reach 3344 μmol h −1 g −1 over 17.5 wt% Ni 2 P/g-C 3 N 4 , which is 68.2 times greater than that of pure g-C 3 N 4 and even much greater than that of 15 wt% Pt/g-C 3 N 4 . The apparent quantum efficiency (QE) is about 9.1% under 420 nm monochromatic. The enhancement mechanism was demonstrated in detail by transient photocurrent responses, photoluminescence spectra and electrochemical impedance spectroscopy . This work develops a facile strategy to fabricate transition metal phosphide/semiconductor heterojunction systems with potential application for photocatalytic H 2 evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）