NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 10
·4160-4167
·
IF 3.069
Fangxiao Wang,Yan-ming Liu,Chun-yang Zhang
Water splitting into hydrogen (H2) to produce clean energy is of great significance for sustainable development. Transition metal phosphides (e.g., Ni12P5 nanoparticles) may be used as non-precious earth-abundant electrocatalysts for the H2 evolution reaction, but their poor electronic conductivity and small surface area hinder efficient catalytic H2 production. In this research, we demonstrate for the first time the facile synthesis of porous carbon/Ni12P5 (C/NiP-C) composites with the dispersion of Ni12P5 nanoparticles onto a conductive porous carbon support in an ionic surfactant hexadecyl trimethyl ammonium bromide (CTAB)-mediated ethanol solution. The CTAB plays dual roles in the synthesis including (1) the introduction of carbon to increase the conductivity of the synthetic materials and (2) the formation of uniform Ni12P5 phosphides through the interaction between the H2PO2− anion, Ni2+, and C19H42N+ cation dissociated from CTAB. The obtained C/NiP-C composites may function as electrocatalysts for the hydrogen evolution reaction (HER) with excellent HER performance (η: 63 mV, η10: 176 mV, Tafel slope: 100 mV dec−1, wherein η represents the onset overpotential and η10 represents the overpotential required for a current density (j) value of −10 mA cm−2) compared with the NixPy composites synthesized in pure ethanol (η: 160 mV, η10: 392 mV, Tafel slope: 154 mV dec−1), the C/NiP-P composites synthesized in a P123-mediated ethanol solution (η: 75 mV, η10: 286 mV, Tafel slope: 210 mV dec−1), and the C/NiP-F composites synthesized in a F127-mediated ethanol solution (η: 80 mV, η10: 302 mV, Tafel slope: 189 mV dec−1). The enhanced HER performance can be attributed to the synergistic effects resulting from the unique structure of the porous C support and the well dispersed Ni12P5 nanoparticles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 11
·3709-3719
·
IF 5.721
Chengwei Qiu,Jinjin Lin,Jinni Shen,Dan Liu,Zizhong Zhang,Huaxiang Lin,Xuxu Wang
Anatase/rutile TiO2 heterophase junction composites have been documented to have much higher photocatalytic activity than single phase TiO2 (nude anatase or nude rutile) for various chemical reactions, including hydrogen production from methanol–water solution and pollution degradation. Further improving the photocatalytic performance of heterophase junction photocatalysts is a subject worth studying in both theory and practice. Based on the concept of junction interface regulation and our previous findings, we embedded Ni12P5 nanoparticles at the interface between anatase (A) and rutile (R) TiO2 by a multi-step preparation method to obtain an A/Ni12P5/R composite with a sandwich-like structure. It was found that loading Ni12P5 on the outside surface of anatase TiO2 (Ni12P5/A), rutile TiO2 (Ni12P5/R), P25 TiO2 (Ni12P5/P25), and A/R composite (Ni12P5/A/R) leads to a decrease in the photocatalytic activity; however, interestingly, the A/Ni12P5/R sample showed higher photocatalytic activity than the other samples of loaded or unloaded Ni12P5, although the loaded Ni12P5 in the latter case is inaccessible to the reactant molecules. This abnormal phenomenon can be attributed to two main reasons. (i) Ni12P5 as a metal-like material has a higher work function than anatase and rutile, which leads to the formation of Schottky junctions at the interface between the two intimately contacted phases. (ii) When Ni12P5 is located on the outside surface, the Schottky junction is unfavorable for the transfer of photogenerated electrons from TiO2 to Ni12P5. However, when Ni12P5 is sandwiched between A and R, the formation of a reverse tandem Schottky junction can facilitate the directed transfer of photogenerated electrons from R phase to A phase. This work again verifies that photocatalytic activity can be regulated and controlled by introducing metal and metal-like particles within the junction of a metal/semiconductor interface or even on a semiconductor/semiconductor interface. Our findings not only provide a novel usage of Ni12P5 as a co-photocatalyst but also deepens the understanding of the Schottky effect on the photocatalytic process.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Bo Chen,Ruiheng Rao,Meifang Cao,Chengzhi He,Yong Qian,Xueqing Qiu,Xinping Ouyang
An imperative current challenge for the production of renewable fuels is the development of efficient catalytic hydrodeoxygenation (HDO) of phenolic-rich bio-oils into hydrocarbons. In this work, a series of bifunctional ZrP 2 O 7(x) -Ni 12 P 5 (where × represents the molar ratio of Zr/Ni in the catalysts) catalysts were prepared for HDO of lignin-derived bio-oils (LBO). The characterization results show that among these bimetallic catalysts, ZrP 2 O 7(0.4) -Ni 12 P 5 possesses the largest specific surface area, pore volume and the highest amount of acid sites (Lewis and Brønsted) due to the introduction of appropriate amount of Zr species. Meanwhile, the interaction between Ni δ+ and Zr species on its surface creates new active sites for the promotion on the hydrogen adsorption and activation, thus endowing the most excellent catalytic performance. Using the optimized catalyst of ZrP 2 O 7(0.4) -Ni 12 P 5 , 95.8% cyclohexane yield could be obtained from the HDO of guaiacol as a model compound from bio-oil under mild condition (3 MPa H 2 and 250 ℃). Moreover, 36.1% hydrocarbon yield is achieved from HDO of lignin-derived bio-oils (LBO) under the same hydrogen pressure and temperature. These findings not only open a novel avenue for designing a cost-effective metal–acid bifunctional catalyst, but also provide a viable approach for converting lignocellulosic biomass feedstocks into valuable hydrocarbons.
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Min Li,Junli Wang,Jiang Liao,Li Wang,Yan Ju,Xuanbing Wang,Jinlong Wei,Nianxiang Hu,Ruidong Xu,Linjing Yang
Electrocatalytic urea oxidation reaction (UOR) is one of the most promising energy-saving alternatives to anodic oxygen evolution reaction (OER), and the development of efficient and stable catalysts for UOR is crucial. Therefore, in this paper, hierarchical structure NiSe@Ni 12 P 5 /NCF with Ni 12 P 5 nanorod arrays coupled with NiSe nanospheres are synthesized on bare nickel-copper foam (NCF) by exogenous phosphorylation and subsequent electrodeposition methods. The catalytic performance of hierarchical structure NiSe@Ni 12 P 5 /NCF in urea-assisted electrolytic water reaction is studied in focus. The results show that the potential of NiSe@Ni 12 P 5 /NCF was only 1.267 V and 1.412 V vs RHE at current densities of 10 mA cm −2 and 100 mA cm −2 , respectively, in addition to no significant activity decay after 140 h stability test. This is attributed to the fact that the introduction of NiSe regulated the interfacial charge distribution, creating an interfacial coupling effect that can greatly increase the original catalytic species, as well as the NiOOH species generated during the UOR process as true active sites, which ultimately improving the electrocatalytic UOR performance of NiSe@Ni 12 P 5 /NCF. This study provides a new idea for the preparation of hierarchical selenide - phosphides for electrochemical 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
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Wenwen Yang,Shan-Shan Xu,Yawen Niu,Yanhui Zhang,Juan Xu
The development of photocatalysts with high catalytic activity and high stability is one of the effective ways to alleviate the energy shortage. A simple hydrothermal method was used to deposit a two-dimensional (2D) non-precious-metal cocatalyst Ni12P5 on the surface of three-dimensional (3D) CdIn2S4 in situ. A 2D/3D Ni12P5/CdIn2S4 heterostructure with close contact was obtained in this work. Its hydrogen production activity can reach 5.01 mmol/g/h, which was about 18 times higher than that of pure CdIn2S4. The apparent quantum yield of 3% Ni12P5/CdIn2S4 at 400 nm was 23.5%. In addition, the band structures of Ni12P5 and CdIn2S4 were calculated according to the experimental data of UV–visible diffuse reflection, Mott–Schottky analysis, and XPS valence band spectrum characterization. With the help of XPS testing, the transfer direction of photogenerated electrons and holes in the composite catalyst was predicted, and then the possible photocatalytic mechanism was speculated.
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
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Jiang Liao,Ao Ju,Wenhao Jiang,Yan Ju,Xueliang Liu,Nianxiang Hu,Ruidong Xu,Junli Wang
Transition metal hydroxides, due to their low cost and high theoretical capacity, are promising candidates for supercapacitors . However, the lower conductivity of hydroxides usually results in devices exhibiting poor specific capacity. Here, Ni(OH) 2 @Ni 12 P 5 electrodes are designed and prepared, showing great potential for applications. This composite electrode, prepared by simple phosphating treatment and electrodeposition . Compared with the Ni(OH) 2 prepared by direct deposition, this rationally designed electrode exhibits more excellent electrochemical properties. The prepared Ni(OH) 2 @Ni 12 P 5 electrode exhibits a good area specific capacitance of 15.89 F•cm −2 at a current density of 10 mA•cm −2 , which is 2.93 times higher than that of the Ni(OH) 2 electrode (5.43 F•cm −2 ). In addition, the assembled Ni(OH) 2 @Ni 12 P 5 //AC asymmetric supercapacitor exhibits an energy density of 0.38 mWh•cm −2 at a power density of 8.00 mW•cm −2 . Therefore, this work provides a new strategy for the synthesis of high-performance supercapacitor electrodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2014
·
IF 12.033
Zhipeng Huang,Zhibo Chen,Zhongzhong Chen,Cuncai Lv,Hua Meng,Chi Zhang
The exploitation of a low-cost catalyst is desirable for hydrogen generation from electrolysis or photoelectrolysis. In this study we have demonstrated that nickel phosphide (Ni12P5) nanoparticles have efficient and stable catalytic activity for the hydrogen evolution reaction. The catalytic performance of Ni12P5 nanoparticles is favorably comparable to those of recently reported efficient nonprecious catalysts. The optimal overpotential required for 20 mA/cm2 current density is 143 ± 3 mV in acidic solution (H2SO4, 0.5 M). The catalytic activity of Ni12P5 is likely to be correlated with the charged natures of Ni and P. Ni12P5 nanoparticles were introduced to silicon nanowires, and the power conversion efficiency of the resulting composite is larger than that of silicon nanowires decorated with platinum particles. This result demonstrates the promising application potential of metal phosphide in photoelectrochemical hydrogen generation.
研究领域:
材料科学
·
电化学
·
光电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yanmei Zhao,Qing Xu,Jiying Shi,Ying Zhang,Zhanpeng Xu,Xu Wang,Linlin Zang,Liguo Sun
Supercapacitors , as being brilliant electrochemical energy storage devices, have been searching for emerging high-performance electrode materials. Covalent organic frameworks (COFs) have become a promising energy storage material because of their high porosity, designed molecular structure and excellent stability. Here, solvothermal synthesis method is applied to coat rGO with triphenylamine-based COFs (TPA-COFs), and Ni 12 P 5 is grown on them in-situ low-temperature phosphating to prepare a ternary composite material (rGO@COFs-Ni 12 P 5 ). The optimal rGO@COFs-Ni 12 P 5 has a high specific capacitance of 1078 F g −1 at a current density of 1 A g −1 . Furthermore, the asymmetric supercapacitor (ASC) assembled with rGO@COFs-Ni 12 P 5 //activated carbon (AC) has a specific capacitance of 134 F g −1 at 1 A g −1 current density. The capacitance retention of 87.6 % after 5000 cycles demonstrates excellent cycling stability. An excellent energy density of 41.88 Wh kg −1 is demonstrated at a power density of 750 W kg −1 . Therefore, the rGO@COFs-Ni 12 P 5 has the potential to be a high-performance supercapacitor energy storage material.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 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
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 11
·5546-5554
·
IF 3.3
Wenwen Yang,Shan-Shan Xu,Yawen Niu,Yanhui Zhang,Jian-Feng Li,Juan Xu
As a member of the ternary sulfides, CdIn2S4 is a visible light responded catalyst with a band gap of 2.2–2.6 eV, which is suitable for solar spectrum. In this study, a simple two-step solvothermal method was used to construct Ni12P5/In(OH)3/CdIn2S4 composite catalysts with type-II and Z-scheme heterojunctions, and there was a synergy between the two heterojunctions. The Ni12P5/In(OH)3/CdIn2S4 composite catalyst formed a donor-mediator-acceptor system for photogenerated electrons, which greatly improved the separation efficiency of the photogenerated carriers. Moreover, the highest hydrogen production activity achieved by the Ni12P5/In(OH)3/CdIn2S4 composites was 5.75 mmol g−1 h−1, which was 21 times the original CdIn2S4.
研究领域:
材料科学
·
催化
·
光催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shaopei Jia,Yanfeng Gao,Xiaofei Ma,Quan Huang,Qian Zhang,Xiaozhe Cheng,Qisong Li,Yan Zhang,Wei Cheng,Menghui Liu,Yunchao Mu
Designing and synthesizing cost-effective hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysts is still the critical impetus for electrocatalytic alkaline water splitting for green hydrogen production. We present a novel strategy to synthesize Ni 12 P 5 –Ni 2 P heterojunction nanoparticles anchored in the three-dimensional (3D) graphene composite bonded by N–P co-doped porous carbon (NPC) through a single high-temperature carbonization. The as-obtained Ni 12 P 5 –Ni 2 P@NPC/3DG possessed an open pore structure, promoting electrolyte diffusion and enhance bubble release. The synergistic effect of the Ni 12 P 5 –Ni 2 P heterojunction with high intrinsic catalytic activity and the N–P co-doped carbon enabled the composite to exhibit high catalytic activity and stability for HER and OER. The optimized Ni 12 P 5 –Ni 2 P@NPC/3DG-0.5 exhibited overpotentials of 209.8/206.1 mV at 10 mA cm −2 and Tafel slopes of 67.9/92.3 mV dec −1 for HER/OER. Furthermore, when Ni 12 P 5 –Ni 2 P@NPC/3DG-0.5 was used as both the cathode and anode for overall water splitting, the cell only required a low voltage of 1.58 V to achieve a current density of 10 mA cm −2 , which was comparable to the catalytic activities of commercial noble metal catalysts. Meaningfully, this synthetic method provided a new strategy to improve electrocatalytic performance of Ni-based phosphides, extensively promoting the development of highly efficient electrocatalysts for alkaline overall water splitting.
研究领域:
材料科学
·
电催化
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Bi-Xian Chen,Jing Tan,Yong-Jie Yie,Su-Ru Tang,Xin Deng,Hao-Yuan Xie,Wen-Ting Liu,Xiaojun Liu,Wei-Qin Xu,Chun-Cheng Lin,Sheng-Run Zheng
The removal of toxic organic compounds from aqueous media through reduction reactions using nonnoble catalysts has attracted much attention in recent years. In this study, a simple method for the synthesis of pure-phase Ni 12 P 5 nanoparticles supported on N, P-codoped carbon (NPC) sheets was developed, in which a nickel phosphine complex was selected as the precursor due to its high Ni/P ratio, air stability and easy preparation. By controlling the pyrolysis temperature, Ni x P y @NPC 700 with a high dispersity and exposed active sites can be obtained, which was characterized by XRD, HRTEM, EDS, XPS, Raman and NH 3 -TPD. The catalytic performance of the composite in the reaction of 4-nitrophenol (4-NP) was assessed under mild conditions, exhibiting excellent catalytic activity with a low apparent activation energy E a (29.87 KJ·mol −1 ). In addition, the catalyst can be recycled without obvious loss of activity for up to ten successive cycles. The outstanding hydrogenation activity is ascribed to the exposed Ni 12 P 5 (3 1 2) crystal plane of Ni x P y @NPC 700 , which is attributed to the lower energy barrier required to form a hydrogen splitting state according to DFT calculations. Moreover, Ni x P y @NPC 700 was creatively coated in a Teflon tube with Nafion as the adhesive and constructed as a fixed-bed device. The continuous-flow catalytic reaction shows that the catalyst can maintain a satisfactory efficiency for approximately 6 h in the reduction of 4-NP and methyl orange (MO). These findings suggest that Ni x P y @NPC 700 is an ideal catalyst for industrial applications for the chemical reduction of toxic compounds from wastewater.
研究领域:
催化
·
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）