Catalysis Science & Technology
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2022
·Vol. 12
·期 5
·1586-1597
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IF 6.177
Shuai Wang,Nan Jiang,Tianhan Zhu,Qiang Zhang,Chunlei Zhang,Huan Wang,Yanguang Chen,Feng Li,Hua Song
Hydrodeoxygenation (HDO) of phenolic compounds is a promising technology to convert biomass materials to value-added chemicals and fuels. However, the development of highly efficient catalysts remains a great challenge. In this work, a facile one-step pyrolysis–phosphidation strategy for the synthesis of carbon-encapsulated nanostructured Ni2P@C(x) catalysts (x is the initial mass ratio of NaH2PO2 to Ni-MOF-74) under a N2 atmosphere from a metal–organic framework (Ni-MOF-74) was proposed and the prepared catalysts were used for HDO of phenol. The effects of different values of x and reaction conditions on the phenol HDO performance as well as product distribution were investigated. The results showed that as compared to the Ni@C catalyst (4.2%), the de-oxygenated product selectivity was enhanced 22.8 times by the introduction of the P species due to the promoted dehydration of cyclohexanol over Ni2P@C(x) catalysts. Ni2P@C(3) exhibited the best catalytic performance at the temperature of 250 °C, pressure of 2 MPa, and reaction time of 2 h; the conversion of phenol was 100%, and the total yield of deoxygenated products reached 100%. The HDO of phenol over the Ni2P@C(x) catalyst mainly proceeded via the HYD pathway (hydrogenation of the aromatic ring to cyclohexanol, and dehydration of cyclohexanol to give rise to cyclohexene followed by hydrogenation to cyclohexane).
研究领域:
催化化学
·
能源材料科学
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产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 11
·1319
·
IF 4.501
Neng Chen,Sai Che,Hongchen Liu,Na Ta,Guohua Li,Fengjiang Chen,Guang Ma,Fan Yang,Yongfeng Li
The in situ growth of metal organic framework (MOF) derivatives on the surface of nickel foam is a novel type of promising self-supporting electrode catalyst. In this paper, this work reports for the first time the strategy of in situ growth of Ni-MOF, where the metal source is purely provided by a nickel foam (NF) substrate without any external metal ions. MOF-derived Ni2P/NPC structure is achieved by the subsequent phosphidation to yield Ni2P on porous N, P-doped carbon (NPC) backbone. Such strategy provides the as-synthesized Ni2P/NPC/NF electrocatalyst an extremely low interfacial steric resistance. Moreover, a unique three-dimensional hierarchical structure is achieved in Ni2P/NPC/NF, providing massive active sites, short ion diffusion path, and high electrical conductivity. Directly applied as the electrode, Ni2P/NPC/NF demonstrates excellent electrocatalytic performance towards both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with low overpotentials of only 58 mV and 208 mV to drive 10 mA cm−2, respectively, in 1 M KOH. Furthermore, Ni2P/NPC/NF acting as the overall water splitting electrodes can generate a current density of 10 mA cm−2at an ultralow cell voltage of 1.53 V. This simple strategy paves the way for the construction of self-supporting transition metal-based electrocatalysts.Keywords:in situ growth;self-supporting;metal–organic framework;Ni2P/NPC;overall water splitting
研究领域:
材料科学
·
电化学
✓ 已验证
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Shanshan Luo,Ran Wang,Peng Hei,Lili Gao,Jingyue Yang,Tifeng Jiao
Hydrogen generation from electrocatalytic water splitting is one of the promising methods to gain clean and sustainable energy. As a semi-reaction in the electrochemical reaction of water splitting, the oxygen evolution reaction (OER) has limited the development and practical application of water electrolysis technology due to its slow kinetic speed and high overpotential. Through different doping options, defect engineering, and interface coupling effects, the activity of the catalyst can be improved. By using low-priced transition metals, composites such as iron-based, cobalt-based and nickel-based phosphorus-doped or nitrogen-sulfur doped composite materials are designed and synthesized to achieve large overpotentials and current densities, thus the performance could be improved. In this work, the synthesis of Ni 2 P/rGO nano-hybrids by phosphating Ni(OH) 2 /rGO precursors at low temperature was investigated. It is worth noting that the synthesized Ni 2 P/rGO hybrid can be used as an OER catalyst under alkaline conditions and remains active for more than 12 h. It has an initial potential at 221 mV and the Tafel slope is 105.7 mV/dec. Present research works provide new ideas for the preparation of alternative precious metal electrocatalysts used for OER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry B
·
2023
·Vol. 17
·期 3
·695-701
·
IF 1.4
Wang Y.,Dong X.,Jiang B.,Dai X.,Song H.
Abstract An alternative route to synthesize Ni 2 P–N/TiO 2 in N 2 atmosphere instead of H 2 atmosphere by thermal treatment method was proposed, and the Ni 2 P–N/TiO 2 catalyst was investigated in benzofuran hydrodeoxygenation (BF HDO) performance. X-ray diffraction (XRD), transmission electron microscope (TEM), N 2 -adsorption specific surface area measurements, CO uptake and X-ray photoelectron spectroscopy (XPS) were used to characterize the catalysts. The results showed that, the Ni 2 P–N/TiO 2 catalyst possessed a smaller and highly dispersed Ni 2 P particles on the catalysts showed a higher benzofuran hydrodeoxygenation conversion (91.9%) and ethylcyclohexane selectivity (70.4%).
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Wenlong Zhen,Xiaofeng Ning,Baojun Yang,Yuqi Wu,Zhen Li,Gongxuan Lu
CdS photocorrosion seriously impeded its application in photocatalysis , especially for water splitting. Here we report new strategies to improve CdS photocorrosion resistance properties significantly by coating Ni 2 P shell and assembling an artificial gill to remove newly formed O 2 from water. Ni 2 P@CdS catalyst can achieve the over-all water splitting under visible light irradiation without addition of any sacrifice reagent and noble metal loading. Compared with CdS itself, the 10Ni 2 P@CdS photocatalyst exhibits excellent photocatalytic activity for hydrogen evolution (251.4 μmol of H 2 in 180 min) with a high AQE (3.89% at 430 nm). This catalyst also presents high photocurrent, low overpotential (−0.32 V vs SCE), and long fluorescence lifetime (16.27 ns) of excited charges. Cd 2+ ions concentration measured by ICP and long term stability results verified the anti-photocorrosion role of Ni 2 P shell on CdS during water splitting reaction. The activity and stability of 10Ni 2 P@CdS is even superior to typical 1Pt@CdS catalyst. Our results confirm CdS can be an active catalyst for photocatalytic hydrogen generation from water under visible irradiation if its stability is enhanced by protection of anti-photocorrosion over-coating shell and removing the nascent formed oxygen from water.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2021
·Vol. 11
·期 1
·1-11
·
IF 4.38
Wang Haitao,Zou Haiyan,Liu Yingying,Liu Zhenglong,Sun Wenshuang,Lin Kunyi Andrew,Li Tielong,Luo Shuangjiang
It’s highly desired but challenging to synthesize self-supporting nanohybrid made of conductive nanoparticles with metal organic framework (MOF) materials for the application in the electrochemical field. In this work, we report the preparation of Ni 2 P embedded Ni-MOF nanosheets supported on nickel foam through partial phosphidation (Ni 2 P@Ni-MOF/NF). The self-supporting Ni 2 P@Ni-MOF/NF was directly tested as electrode for urea electrolysis. When served as anode for urea oxidation reaction (UOR), it only demands 1.41 V (vs RHE) to deliver a current of 100 mA cm −2 . And the overpotential of Ni 2 P@Ni-MOF/NF to reach 10 mA cm −2 for hydrogen evolution reaction HER was only 66 mV, remarkably lower than Ni 2 P/NF (133 mV). The exceptional electrochemical performance was attributed to the unique structure of Ni 2 P@Ni-MOF and the well exposed surface of Ni 2 P. Furthermore, the Ni 2 P@Ni-MOF/NF demonstrated outstanding longevity for both HER and UOR. The electrolyzer constructed with Ni 2 P@Ni-MOF/NF as bifunctional electrode can attain a current density of 100 mA cm −2 at a cell voltage as low as 1.65 V. Our work provides new insights for prepare MOF based nanohydrid for electrochemical application.
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
FUEL
·
2025
·
IF 7.5
Zhe Yin,Ziwen Wang,Jun Wang,Binglin Tang,Guoping Yu,Qiuyu Wang,Huanyu Chen,Kangzheng Li,Zhichao Zhang,Qingcheng Luo,Fuqin Zhang,Bo Lv
The use of photoreforming to treat plastics and degrade plastics to small molecular organic matter is an emerging approach to solve white pollution in the ocean and produce new energy. Structurally defective g-C 3 N 4 (COCN) is compounded by adding ascorbic acid during the synthesis of graphitic carbon nitride (g-C 3 N 4 ). L-cysteine is added to compose L-CdS. By constructing a heterojunction, we synthesize the ternary composite COCN/L-CdS/Ni 2 P. The hydrogen production rate of COCN/L-CdS/Ni 2 P reaches 29.11 mmol/g/h at 5 h, which is 7.52 times and 727.7 times of L-CdS and COCN, respectively. During the production of hydrogen, polylactic acid (PLA) is degraded to pyruvate. This study demonstrates that COCN/L-CdS/Ni 2 P can not only photoreformate plastics in seawater into small molecular organics, but also efficiently produce H 2 using seawater as a hydrogen source. This has a significant role to treat plastic pollution in seawater and product clean energy.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Honglong Qu,Tiantian Cao,Qiaolin Li,Gang Chen,Hongtao Guan,Chengjun Dong
Reasonably tuning the structure of Ni 2 P based complex electrode is decisive to boost its applications in supercapacitor. Herein, we demonstrate the design and preparation of NiMoO 4 @Ni 2 P nanosheet arrays with unique core–shell architecture on Ni foam (NF) for pseudocapacitor. The directly grown Ni–MOF on NF was used to couple with NiMoO 4 via an ion exchange between BDC 2− and MoO 4 2- , which is crucial to form a stable NiMoO 4 @Ni 2 P/NF core–shell structure during the subsequent phosphatization. The NiMoO 4 @Ni 2 P/NF electrode can deliver a high capacitance of 3655.1 mF cm −2 at 1 mA cm −2 with a remarkable cycling stability (95.35 % over 4000 cycles). Additionally, the assembled NiMoO 4 @Ni 2 P/NF–2//AC/NF device achieves a stable working voltage of 1.7 V and delivers a superior energy density of 0.155 m Wh cm −2 at a power density of 1.705 mW cm −2 . The outstanding performance of pseudocapacitor is mainly ascribed to the stable diffusion channel, rich reactive species and hetero–interface, enabling fast electrochemical reaction kinetics.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2023
·
IF 2.8
Meifeng Chen,Tingting Xiao,Yuanfei Huang,Xiaosong Zhou,Jin Luo,Xunfu Zhou,Yuanyuan Ge
Research on the subject of photolysis focuses on the creation of effective non-precious metal co-catalysts. Graphitic carbon nitride (g-C 3 N 4 ) is a promising candidate for photocatalytic hydrogen generation from water. But its photocatalytic activity is limited by the slow redox reaction, high carrier recombination rate, and inadequate optical absorption. Incorporating in situ loading Ni 2 P/Cu 3 P and phosphorus doping on g-C 3 N 4 is effective in overcoming the drawbacks. Phosphorus doping reduces the band gap of g-C 3 N 4 for increased light absorption and improves the separation of photogenerated charge. Additionally, Ni 2 P/Cu 3 P heterojunctions anchored on P-doped g-C 3 N 4 (P-C 3 N 4 ) as non-noble co-catalysts boost light adsorption, enabling charge transfer and speeding the hydrogen evolution process. The resultant Ni 2 P/Cu 3 P@P-C 3 N 4 composite photocatalyst achieves an effective photocatalytic hydrogen evolution rate of 201 times greater than that of g-C 3 N 4 (12.9 μmol·h −1 ·g −1 ). This work is instructive to develop efficient g-C 3 N 4 -based photocatalysts for photocatalytic water splitting without the need for noble metals.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Genlei Zhang,Zhaoyan Liu,Zhengli Xiao,Jiale Huang,Qingbiao Li,Yuxin Wang,Daohua Sun
Nanoparticles of Au–Pd with core–shell structure were synthesized through the coreduction of HAuCl4 and Na2PdCl4 in aqueous media by using cetyltrimethylammonium chloride as a reducing agent. The morphology and structure of the core–shell NPs were confirmed by transmission electron microscopy, X-ray diffraction, and UV–vis spectroscopy. We further demonstrate that the core–shell structure is formed as a synergistic result of low interfacial energy and small lattice mismatch between Au and Pd, different redox potentials of PdCl42–/Pd and AuCl4–/Au, and low reduction rates of HAuCl4 and Na2PdCl4. The catalyst of Au–Pd core–shell nanoparticles supported on Ni2P–graphite nanoplatelets (Au@Pd/Ni2P-GNPs) exhibits a noticeably higher activity than Pd and Pt catalysts in electrochemical ethanol oxidation. Moreover, we show that the activity and stability of Au–Pd core–shell for ethanol oxidation can be significantly enhanced using Ni2P nanoparticles as a cocatalyst. The prepared Au@Pd/Ni2P-GNPs catalyst exhibits a current density of 1.348 A mg–1metal, which is 2.1 times as high as that of Au@Pd/GNPs without Ni2P nanoparticles deposited.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yinchen Dai,Wubing Chen,Baochun Guo,Xiao Li,Jibiao Guan,Lina Wang,Ming Zhang
Efficient and inexpensive electrocatalysts play an important role in electrolysis of water and hydrogen evolution reaction . The catalytic activity of electrocatalyst can be improved by adjusting the electronic structure and increasing the active center. In this study, Ni 2 P nanosheets were grown on carbon cloth through straightforward solvothermal, and tiny MoS 2 nanosheets were uniformly covered on Ni 2 P nanosheets by in-situ growth method to form heterogeneous electrocatalyst (Ni 2 P @ MoS 2 /CC). The results show that Ni 2 P @ MoS 2 /CC had more active sites than Ni 2 P/CC and MoS 2 /CC catalysts. In addition, the interface interaction based on heterogeneous structure promotes its charge transfer kinetics. In alkaline electrolyte , Ni 2 P @ MoS 2 /CC electrocatalyst had good HER performance. At a current density of 10 mA cm −2 , the overpotential was 99 mV, and the Tafel slope was 97 mV dec −1 . In addition, the catalyst showed excellent electrochemical stability, with no significant loss of activity after 2000 cyclic voltammetry tests and 50 h i-t tests.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Aizhu Chen,Xuhui Yang,Lijuan Shen,Ying Zheng,Min-Quan Yang
Loading cocatalysts onto semiconductors is one of the most popular strategies to inhibit charge recombination, but the efficiency is generally hindered by the localized built-in electric field and the weakly connected interface. Here, this work designs and synthesizes a 1D P-doped CdS nanowire/Ni 2 P heterojunction with gradient doped P to address the challenges. In the composite, the gradient P doping not only creates a funneled bandgap structure with a built-in electric field oriented from the bulk of P-CdS to the surface, but also facilitates the formation of a tightly connected interface using the co-shared P element. Consequently, the photogenerated charge carriers are enabled to be pumped from inside to surface of the P-CdS and then smoothly across the interface to the Ni 2 P. The as-obtained P-CdS/Ni 2 P displays high visible-light-driven H 2 evolution rate of ≈8265 µmol g −1 h −1 , which is 336 times and 120 times as that of CdS and P-CdS, respectively. This work is anticipated to inspire more research attention for designing new gradient-doped semiconductor/cocatalyst heterojunction photocatalysts with bridged interface for efficient solar energy conversion.
研究领域:
材料科学
·
能源转换
·
光催化技术
✓ 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）