ACS Applied Nano Materials
·
2024
·
IF 5.3
Tianyue Su,Junsheng Wang,Chun Cai
The nickel phosphides have garnered increasing attention as an excellent catalytic site in the fields of electrocatalysis and hydrotreating, but their application in organic synthesis remains infrequent. In this study, ammonium phosphate and nickel chloride were employed as the doping sources for the first time to synthesize the Ni-based ZIF-8 precursor via the host–guest method. Subsequently, the precursor was pyrolyzed to obtain Ni2P nanoparticles (NPs) supported on N, P co-doped carbon. The composite materials exhibit elevated metal loading and effective dispersion due to the synergistic combination of phosphorus and nickel. Specifically, compared with Ni-NC, the optimal Ni2P-NCP-1 exhibits enhanced catalytic activity in the α-alkylation of arylacetonitriles with alcohols using KOH as the base. It shows a wide broad substrate scope at 140 °C for 12 h in n-octane using a hydrogen borrowing strategy. Through characterizations and mechanistic studies, it has been discovered that the introduction of P source not only provides more basic sites on carbon matrix but also leads to the formation of Ni2P NPs, which facilitates the catalytic efficiency by modifying the electronic structure of Ni. Compared with the metallic Ni species, the synergistic effect between Ni2P and acid-basic sites significantly influences the dehydrogenation of alcohols to generate Ni–H species. This study successfully achieves simultaneous phosphating of both the metal and support, and it also demonstrates that the N2P-NCP-1 catalyst has significant potential in the heterogeneous organic transformation field.
研究领域:
有机化学
·
材料科学
·
催化反应
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 22
·6674-6682
·
IF 7
Yiqiang Sun,Wenwen Cao,Xuening Ge,Xiaodong Yang,Yong Wang,Yuan Xu,Bo Ouyang,Qi Shen,Cuncheng Li
The direct urea fuel cell (DUFC) with high energy efficiency and convenience is expected to have promising practical applications in green energy development, but it is severely hindered by the slow kinetics of the intrinsic urea oxidation reaction (UOR). Herein, a built-in electric field (BEF) strategy to obtain efficient heterogeneous Ni2P/NiSe2 electrocatalysts as bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the UOR is reported. XPS, energy band structure analysis and DFT calculations verify that the BEF in the heterojunction can induce electron transfer between Ni2P and NiSe2. More importantly, the BEF-induced interfacial charge distributions endow the Ni2P/NiSe2 heterogeneous electrocatalysts with optimized binding free energy of the H* and urea intermediates, thereby resulting in an intrinsic enhancement of the catalytic activity. Our work may explore a pathway to design efficient bifunctional electrocatalysts by precisely constructing and manipulating an interfacial BEF.
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Zhenqiang Huang,Yanan Zhang,Ke Jia,Rui Zuo,Kemeng Ji,Mingming Chen
Lithium-sulfur batteries (LSBs) emerge as promising energy storage devices due to their high theoretical energy density . So far, there are constrained issues that need to be urgently addressed, such as the shuttle effect of lithium polysulfides (LiPS) and the sluggish kinetics of redox reactions . Herein, NiSe-Ni 2 P/C composite was synthesized and casted on the cathode side of polypropylene (PP) separator. This investigation reveals that the adsorption-catalysis synergistic effect of NiSe-Ni 2 P/C composite, accelerates the reduction of LiPS to lithium sulfide (Li 2 S) as well as the oxidation of Li 2 S. The synergistic effect effectively mitigates the shuttle effect of LiPS, reduces concentration polarization, and improves Coulombic efficiency (CE) throughout the entire lifespan. At a current density of 0.05 C, LSBs with NiSe-Ni 2 P/C modified PP separators exhibit a remarkable high initial CE of 97.0% and a substantial discharge specific capacity of 1205.4 mAh g s −1 . Even under conditions of a high sulfur loading (4.3 mg cm −2 ) and a limited electrolyte dosage (10 μL mg s −1 ), the LSBs maintained a reversible specific capacity of 804 mAh g s −1 , a CE of 94%, and an energy density of 1232.1 Wh kg s −1 after 720 h of continuous cycling at 0.05 C. This work provides a solution for achieving long-time, high-capacity, and high-CE electrochemical performance in LSBs with a high sulfur loading and a limited electrolyte dosage.
研究领域:
能源存储
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yirong Wang,Xuan Yu,Zhonghong Xia,Xuanrong Li,Ya Gao,Jing Zhang,Wuliang Feng,Xingli Zou,Yufeng Zhao
The high overpotential and sluggish kinetics of oxygen evolution reaction (OER) severely hinder the widespread application of electrochemical water splitting, especially at industrial-level current densities. Herein, we report a novel heterostructural Ni-based metal organic framework (MOF)-Ni 2 P in-situ grown on iron foam (NiMOF-Ni 2 P/IF), which shows remarkable OER activity and stability. We demonstrate that the work function difference between NiMOF and Ni 2 P leads to the strong electron coupling effect by promoting electron transfer at the interface and results in a discernible upward shift of the d-band center of Ni sites for favorable OH − adsorption. The as-fabricated NiMOF-Ni 2 P/IF exhibits an ultralow overpotential of 330 mV and a small cell voltage of 1.796 V to drive NiMOF-Ni 2 P/IF‖Pt/C system at 1000 mA cm −2 in 1 M KOH, outperforming the majority of state-of-the-art non-noble-metal-based electrocatalysts. Furthermore, the catalyst shows remarkable performance even under harsh industrial conditions of 40, 60, and 80 °C in 6 M KOH. In addition, NiMOF-Ni 2 P/IF holds great promise with remarkable stability of 200 h and 600 cycles in simulated seawater and secondary zinc-air batteries (ZABs), respectively. This work offers a rational design strategy for low cost, high activity, and long durability OER electrocatalyst based on in-depth comprehension of the electronic coupling effect.
研究领域:
材料科学
·
电化学
·
能源催化
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 8
·3935-3944
·
IF 2.961
Wu Yanxia,Chen Xiangping,Su Lirong,Wang Qingtao,Ren Shufang
Increasing active sites by constructing a heterostructure is a very effective method to improve the electrocatalytic performance. In this work, we synthesized a three-dimensional self-supporting Ni 2 P-Ni 12 P 5 /NF heterostructure supported on nickel foams by hydrothermal reaction and low-temperature phosphorization, used as an efficient hydrogen evolution reaction (HER) electrocatalyst. The structure, composition, morphology, and HER performance of the catalyst were characterized by XRD, XPS, SEM, TEM, and electrochemical workstation. The experimental results show that the Ni 2 P-Ni 12 P 5 /NF heterostructure demonstrates better HER catalytic activity in 0.5 M H 2 SO 4 , only requiring an overpotential of 124 mV at 10 mA cm −2 with a Tafel slope of 84.1 mV dec −1 and displaying good long-term stability. The high activity and stability of the as-synthesized Ni 2 P-Ni 12 P 5 /NF catalyst in HER are mainly due to the synergy between Ni 2 P-Ni 12 P 5 with a unique heterostructure and nickel foam conductive substrate with a three-dimensional porous structure, which is beneficial to increase the electrocatalytic active area and thus provide more active sites.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Bolun Tang,Yunbo Shi,Canda Zheng,Kuo Zhao
To date, various materials have been widely investigated for developing highly selective and sensitive sensors for NO
2
, a common hazardous gas. However, the associated NO
2
-gas-sensor fabrication methods exhibit several drawbacks, which hinder the development of NO
2
-sensitive gas sensors with excellent selectivity. In this study, NiP
2
-Ni
2
P polymorphs with observable heterointerfaces were prepared using metalloid NiP
2
and metallic Ni
2
P for NO
2
gas sensing, and the characteristics of the synthesized polymorphs were evaluated through X-ray diffraction and energy-dispersive spectrometry. At 160 °C, the fabricated sensor exhibited a response of 1.5%-93.14% for NO
2
gas over a concentration range of 0.5-60 ppm; its response and recovery times were 16 and 55 s, respectively. In addition, the sensor exhibited excellent NO
2
selectivity and long-term stability. Density functional theory calculations revealed the adsorption sites of NO
2
molecules on NiP
2
, and the gas-sensing mechanism was elucidated. The findings of this study establish NiP
2
-Ni
2
P, which is currently employed as an outstanding electrocatalyst for hydrogen evolution, as a potential NO
2
sensor platform with excellent selectivity and efficient recovery characteristics.
研究领域:
材料科学
·
化学传感器
·
环境监测
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Wenfei Yang,Shuzheng Wu,Cejun Hu,Hongwei Zhang,Qingyan Cui,Xiaojun Bao,Pei Yuan
The hydrogenation of unsaturated bonds and elimination of sulfur impurities in C 9 petroleum resin (C 9 PR) are crucial for improving its quality and performance. In this study, we prepared a nanoflower-like Ni 2 P/Al 2 O 3 catalyst using an in-situ synthesis combined with liquid-phase phosphidation strategy and applied for the production of value-added hydrogenated C 9 PR. In-situ synthesis of Ni-Al hydrotalcite anchors and disperses Ni nanoparticles, while liquid-phase phosphidation introduces high-content Ni δ+ and P δ− active sites and prevents the formation of inactive AlPO 4 , synergistically enhancing both hydrogenation and desulfurization activities. The synthesized Ni 2 P/Al 2 O 3 catalyst achieves a 99.6 % hydrogenation degree and reduces sulfur content from 137 ppm to 0 ppm, much better than the catalysts prepared by conventional impregnation and metal phosphate reduction methods. These results give valuable insights for designing efficient catalysts and advancing single-step hydrorefining processes to generate high-quality, value-added hydrogenated petroleum resins.
研究领域:
催化化学
·
能源化工
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Shen Xu,Jianying Huang,Zengxing Li,Yonggang Lei,Yingzhen Zhang,Kim Hoong Ng,Yuekun Lai
It is very attractive to find a cheap and efficient cocatalyst for enhancing the H 2 generation of graphitic carbon nitride (CN) under visible light. To achieve that, we proposed a novel two-step method to deposit sub-10 nm metallic Ni 2 P particles on the surface of CN sheets for a maximized interfacial contact. Characteristic results confirmed the establishment of ohmic heterojunction upon Ni 2 P-modification of CN, which deemed to be an effective measure to alleviate photo-charges recombination. In addition to facilitating spatial separation of charges, Ni 2 P could also enhance the optical properties of CN while reducing its impedance for interfacial electron shuttling. Better still, the P-end of Ni 2 P is highly electronegative, offering desirable H + -capturing capability for enhanced H 2 generation. These give rise to an improved H 2 production of Ni 2 P/CN composite, optimally at 645.3 μmol g −1 ·h −1 as compared to immeasurable H 2 yielded by the pristine CN. Such photocatalytic performance is even comparable to the Pt-modified CN photocatalyst (640.6 μmol g −1 ·h −1 ). In recyclability test, a notable activity suppression of 33.17% was recorded after four reaction cycles. This can be ascribed to the pronounced photo-corrosion of the Ni 2 P cocatalyst during photoreaction. Nonetheless, a remarkably high H 2 generation (1328.6 μmol g −1 in 3 h) was still attained at 4 th cycle. This justifies the effectiveness of our synthesized Ni 2 P cocatalyst in enhancing H 2 generation of CN under visible light irradiation.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 11
·1848
·
IF 5.719
Xiangyun Tian,Peng Yi,Junwei Sun,Caiyun Li,Rongzhan Liu,Jian-Kun Sun
The exploration of high-performance and low-cost electrocatalysts towards the oxygen evolution reaction (OER) is essential for large-scale water/seawater splitting. Herein, we develop a strategy involving the in situ generation of a template and pore-former to encapsulate a Ni5P4/Ni2P heterojunction and dispersive FeNi alloy hybrid particles into a three-dimensional hierarchical porous graphitic carbon framework (labeled as Ni5P4/Ni2P–FeNi@C) via a room-temperature solid-state grinding and sodium-carbonate-assisted pyrolysis method. The synergistic effect of the components and the architecture provides a large surface area with a sufficient number of active sites and a hierarchical porous pathway for efficient electron transfer and mass diffusion. Furthermore, a graphitic carbon coating layer restrains the corrosion of alloy particles to boost the long-term durability of the catalyst. Consequently, the Ni5P4/Ni2P–FeNi@C catalyst exhibits extraordinary OER activity with a low overpotential of 242 mV (10 mA cm−2), outperforming the commercial RuO2catalyst in 1 M KOH. Meanwhile, a scale-up of the Ni5P4/Ni2P–FeNi@C catalyst created by a ball-milling method displays a similar level of activity to the above grinding method. In 1 M KOH + seawater electrolyte, Ni5P4/Ni2P–FeNi@C also displays excellent stability; it can continuously operate for 160 h with a negligible potential increase of 2 mV. This work may provide a new avenue for facile mass production of an efficient electrocatalyst for water/seawater splitting and diverse other applications.Keywords:FeNi alloy;Ni5P4/Ni2P heterojunction;solid-state grinding;in situ template;oxygen evolution reaction
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 Energy Materials
·
2025
·
IF 5.5
Wen-jing Yao,Sheng Liao,Hao-yi Fu,Wen-yi Xu,Meng Xu,Dan Zhao,Chao Chen
The hydrophilic property of the catalytic interface has been seldom focused on particularly, although many green and sustainable catalysis transformations involve water. Addressing the issue, we prepared Dy–Ni–P catalysts for the 5-hydroxymethylfurfural oxidation reaction (HMFOR) to 2,5-furandicarboxylic acid (2,5-FDCA) in this work. The catalysts were clarified as (DyPO4)m/Ni2P composites with molar ratio m within 0.08–0.28 by ICP-OES, XRD, XPS, and HRTEM characterizations. The catalytic performance of samples was comprehensively analyzed by the HPLC technique, 1H NMR spectra, and various electrochemical tests, indicating that the introduction of DyPO4 in a proper amount (m = 0.16) would significantly enhance the catalytic efficiency versus singular Ni2P in terms of 2,5-FDCA yield (91 vs 26%), selectivity (99 vs 47%), and Faradaic Efficiency (F.E.: 98 vs 70%). The enhancements were accompanied by improved kinetic features such as the Tafel slope (53 vs 95 mV dec–1) and intrinsic activity (3.3 vs 1.7 mA cm–2). The boosting endowment (DyPO4)m/Ni2P stands among the top members of reported Ni-based HMFOR catalysts. The promoter effect of DyPO4 was further investigated by H2O-TPD, contact angle, zeta potential, OCP, and EIS measurements. It was testified that the nonhydrophilic Ni2P surface would be converted to a hydrophilic composite interface with the introduction of DyPO4; in line with the essential change, transfer of reactants and activation of water were obviously intensified with the lowered charge transfer resistance along the catalytic interface, which was responsible for the enhanced catalytic behavior of (DyPO4)m/Ni2P versus Ni2P. The above discovery made the topic regarding water indicate that the hydrophilic property of the catalytic interface played a significant role in facilitating heterogeneous catalysis transformations involving water; exampled by the current (DyPO4)m/Ni2P for HMFOR, rare-earth phosphate could be referred to as an outstanding hydrophilic promoter to innovate excellent catalysts for technology-important chemical engineering involving water.
研究领域:
催化化学
·
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Guotai Li,Hao Li
Catalytic transfer hydrogenation (CTH) is regarded as a promising technology for upgrading biomass to fuels and valuable chemicals in the presence of heterogeneous catalysts. In this work, three Ni2P-based catalysts, such as Ni2P@YSS with a yolk–shell structure, Ni2P@SiO2 with a core–shell structure, and Ni2P/SiO2 with a simple surface-loading structure, were prepared using different synthesis strategies, and were used in the CTH of vanillin in an ethanol environment. The Ni2P@YSS catalyst exhibited the highest conversion (85.6%) and a selectivity of 2-methoxy-4-methylphenol of 76.2% at 180 °C for 5 h among a series of Ni2P-based catalysts, which are closely related to the higher specific surface area (462 m2 g–1), acidic site density (2.31 mmol g–1), and stronger metal–support interactions of the Ni2P@YSS catalyst. Besides, transition metals (Zr and La) were introduced to the Ni2P@YSS catalyst to increase the oxygen vacancy and improve the H dissociation ability, thereby enhancing the catalytic performance of the Ni2P-based catalysts.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 22
·7447-7456
·
IF 4
Qian Chen,Jianfeng Huang,Ting Xiao,Liyun Cao,Dinghan Liu,Xiaoyi Li,Mengfan Niu,Guoting Xu,Koji Kajiyoshi,Liangliang Feng
Exploring low-cost and highly active photocatalysts with noble metal-free cocatalysts is of great significance for photocatalytic hydrogen evolution under simulated sunlight irradiation. In this work, a novel V-doped Ni2P nanoparticle loaded g-C3N4 nanosheet is reported as a highly efficient photocatalyst for H2 evolution under visible light irradiation. The results demonstrate that the optimized 7.8 wt% V-Ni2P/g-C3N4 photocatalyst exhibits a high hydrogen evolution rate of 271.5 μmol g−1 h−1, which is comparable to that of the 1 wt% Pt/g-C3N4 photocatalyst (279 μmol g−1 h−1), and shows favorable hydrogen evolution stability for five successive runs within 20 h. The remarkable photocatalytic hydrogen evolution performance of V-Ni2P/g-C3N4 is mainly due to the enhanced visible light absorption ability, the facilitated separation of photo-generated electron–hole pairs, the prolonged lifetime of photo-generated carriers and the fast transmission ability of electrons.
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
危险品化学品经营许可证（带存储）