Functional Materials Letters
·
2024
·
IF 1.2
Yaoting Wang,Zhiling Chou,Huimin Zhang,Yiming Zou,Junfu Wang,Haochen Ding,Hong Zhao,Song Wang,Xin Xiao
The electrochemical decomposition of water to produce hydrogen using clean energy sources has become a sustainable pathway for hydrogen utilization, with efficient hydrogen evolution reaction (HER) electrocatalysts crucial for high energy conversion efficiency. Nickel phosphide is widely utilized in the electrocatalytic HER owing to its unique electronic properties, efficient electrocatalytic performance, and excellent corrosion resistance. However, the HER activity of nickel–phosphide electrocatalysts remains low, necessitating further research for practical applications. This paper introduces a method for preparing Ru-doped Ni 5 P 4 , including the mechanism of the HER, the preparation of Ru@Ni 5 P 4 , and its performance in electrocatalytic hydrogen evolution. The preparation methods for the Ru@Ni 5 P 4 electrocatalyst were classified, with a focus on the preparation techniques and research progress regarding its HER activity. The HER activities of the pure Ni 5 P 4 , Ru@Ni 5 P 4 , and 10 wt.% Pt/C electrodes were compared based on experimental indicators such as the overpotential and Tafel slope at a specific current density.
研究领域:
材料科学
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电化学
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能源化学
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催化化学
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可持续能源
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
·
IF 14.3
Linyin Huang,Xinyue Wei,Yuan Yu,Dongfeng Sun,Yanning Qu,Jianlong Wen,Xiaoya Yuan,Qingmei Su,Fangyou Meng,Gaohui Du,Youqing Wang,Bingshe Xu,Kai Wang
In NiP-based catalysts, although Ni 2 P and Ni 5 P 4 have relatively high catalytic activity, the catalytic performance of single-phase Ni 2 P or Ni 5 P 4 is still far from that of noble metal catalysts. The dual-phase heterojunction has better catalytic performance than single-phase materials due to its faster interface charge transfer rate and more active sites. The Ni 2 P/Ni 5 P 4 @CC heterostructural catalyst with oriented porous nanosheet arrays grown on carbon cloth (CC), was in-situ constructed through the controllable phase transition of Ni 2 P. By modulating the amount of P source (P-dependent) or the phosphating reaction time (Time-dependent), the degree of the Ni 2 P phase transition could be modulated, thus obtaining the Ni 2 P/Ni 5 P 4 @CC heterostructural catalyst with the required component ratio of Ni 2 P and Ni 5 P 4 . When the ratio of Ni 2 P and Ni 5 P 4 was 15.7:84.3, the Ni 2 P/Ni 5 P 4 @CC catalyst had the best catalytic performance. Its hydrogen evolution reaction (HER) overpotentials were only 139 and 87 mV overpotentials reaching −10 mA/cm 2 in 1 mol/L KOH and 0.5 mol/L H 2 SO 4 , respectively, which was much lower than that of the single-phase Ni 2 P@CC (base: 278 mV; acid: 123 mV) and Ni 5 P 4 @CC (base: 166 mV; acid: 106 mV) catalysts. Specially, in acidic electrolyte, HER overpotential at a higher current density of −100 mA/cm 2 of the Ni 2 P/Ni 5 P 4 @CC catalyst was 270 mV, which was even lower than that of the Pt/C catalyst (328 mV), indicating that the Ni 2 P/Ni 5 P 4 @CC heterostructural catalysts had promising prospects for commercial applications. The mechanism of catalytic performance enhancement was investigated by the density functional theory (DFT) calculations.
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 COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yufeng Wang,Qing Ye,Lu Lin,Yanxia Zhao,Yongliang Cheng
Designing and fabricating highly competent and inexpensive electrocatalysts are highly desirable for application in electrocatalytic water splitting. In this study, we synthesized NiFeRu/C nanofibers and Ru, Fe dual-doped Ni 5 P 4 (Ru, Fe-Ni 5 P 4 )/C nanofibers as complementary electrocatalysts for overall water splitting through electrospinning, carbonization, and phosphorization treatment, respectively. The NiFeRu/C nanofibers and Ru, Fe-Ni 5 P 4 /C nanofibers showed high hydrogen evolution reaction and oxygen evolution reaction activity, respectively, due to the presence of numerous exposed active sites and optimized adsorption capacity for the reaction intermediates contributed by the synergistic interaction among different metal components in the electrocatalysts. Hence, the assembled asymmetrical electrolytic cell effectively promoted overall water splitting, requiring a voltage of 1.569, 1.744, and 1.872 V to achieve a current density of 100, 500, and 1,000 mA cm −2 , respectively, and it was better than Pt/C||IrO 2 . Additionally, the electrolytic cell could work at 500 mA cm −2 for 100 h without any noticeable deterioration in activity, which indicated that it was durable at high current density. In this study, we described a novel method for designing highly efficient electrocatalysts for overall water splitting.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xia Liu,Xiaolan Fan,Hui Ding,Guancheng Xu,Li Zhang
Rational design of efficient catalysts with high activity and prolonged stability to overcome the sluggish kinetics of electrocatalytic water splitting is imperative but challenging. The optimization of electrocatalysts’ components and geometric structure is deemed an effective strategy. Herein, Fe, Co co-doped Ni5P4 hierarchical cube-on-sheet nanoarrays grown on coal-based carbon nanofibers (FeCo-Ni5P4@C–CNFs) was synthesized by electrospinning, hydrothermal methods, coprecipitation, and phosphorization. Benefiting from metal doping with a strong interaction for electron transfer, the cube-on-sheet architecture with excellent superhydrophilic and aerophobic properties for mass transportation, and self-supported C–CNFs as a conductive substrate with remarkable structural durability, the obtained FeCo-Ni5P4@C–CNFs displays superior bifunctional electrocatalytic properties. In 1.0 M KOH electrolyte, the overpotentials of hydrogen evolution and oxygen evolution reactions are only 46 and 221 mV at a current density of 10 mA cm–2, respectively. In addition, the assembled FeCo-Ni5P4@C–CNFs electrolyzer requires a low cell voltage of 1.50 V at 10 mA cm–2. This study offers a method for the rational design of highly active electrocatalysts and also enriches the means of component and structure modulation of transition metal phosphides.
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
Catalysis Science & Technology
·
2023
·Vol. 13
·期 20
·5868-5879
·
IF 5
Guixiang Peng,Xueyang Qi,Wenbin Qu,Xiaoli Shao,Lixin Song,Pingfan Du,Jie Xiong
As a new type of pollutant, microplastics, especially microfibers in textiles, pose a great threat to the environment and human health. It remains challenging to remove such emerging organic pollutants. Photocatalytic technology is an effective strategy for H2 fuel production and pollutant reuse using solar energy due to its low cost and environmental friendliness. In this work, the flexible Ni5P4/TiO2/C nanofiber (NF) film photocatalysts were fabricated by electrospinning, hydrothermal treatment and low-temperature phosphating. With the addition of Ni5P4 onto TiO2/C NFs, the light absorption of composite nanofibers was improved, restraining the recombination of carriers simultaneously. Accordingly, the photocatalytic activity of the NFs was improved. The hydrogen evolution of the Ni5P4/TiO2/C NFs for photocatalytic degradation of PET microfibers reached 76.66 μmolH2 gsub−1 in 12 h, which is three times that of TiO2/C NFs. The weight loss rate of PET microfibers reached 6.23% after Ni5P4/TiO2/C NF catalysis, which was nearly 5 times higher than that without a catalyst (1.2%). In addition, the nanofiber film is easy to recycle and avoids secondary pollution. This work provides new ideas for achieving the goal of reducing microplastic fibers and microplastics in an efficient and environmentally friendly way.
研究领域:
环境科学
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Li Luo,Jinfeng Tian,Wenfeng Hu,Peng Han,Wei Wang,Baojun Ma
Non-noble metal co-catalysts for hydrogen production have capacitance characterization, which can store photo-excited electrons from semiconductor and show capacitance catalysis. However, the overlarge capacitance of co-catalysts constrains prompt release of electrons. Here, we reported a new and highly efficient co-catalyst Zn-Ni 5 P 4 via evenly doping Zn in Ni 5 P 4 . Loading Zn-Ni 5 P 4 on CdS, the photocatalyst Zn-Ni 5 P 4 /CdS shows an ultrahigh activity of 8969 μmol/g/h, which is 2.4 times of Ni 5 P 4 /CdS (3668 μmol/g/h). More interestingly, by the Pt loading on the surface of Ni 5 P 4 , the (Pt/Ni 5 P 4 )/CdS shows only 1.3 times of Ni 5 P 4 /CdS. Zn doping in Ni 5 P 4 reduces the capacitance by 140 mF/g and electrochemical impedance, which benefits the release of photo-excited electrons. Moreover, the reduced overpotential and the increased specific surface area also account for the enhanced co-catalytic performance of Zn-Ni 5 P 4 . This paper presents an effective and low-cost method to inhibit negative effect of capacitance catalysis of non noble co-catalysts.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Zhihui Ma,Haitao Wang,Hanyu Ma,Sihui Zhan,Qixing Zhou
The electrochemical urea oxidation (UOR) involves the generation of gases bubbles, which often cause the blockage of the electrode surface leading to decline activity. Herein, we report the growth of Ni 5 P 4 nanosheets on nickel foam as bifunctional electrode (CA-Ni 5 P 4 @NiO x /NF) for urea electrolysis. The results indicated that a thin layer of amorphous NiOx formed on the surface of Ni 5 P 4 nanosheets to yield a unique crystalline@amorphous core–shell structure, which can be maintained during long time urea electrolysis. The outstanding UOR performance of CA-Ni 5 P 4 @NiO x /NF was attributed to the unique structure, which not only combine the good conductivity and abundant active sites, but also rendered the CA-Ni 5 P 4 @NiO x /NF superhydrophilic and aerophobic that significantly facilities the release of gases bubbles formed during UOR to avoid the blockage of the active sites. As a result, the CA-Ni 5 P 4 @NiO x /NF electrode exhibited excellent performance for UOR, which only needs 1.45 V (vs. RHE) to deliver a current of 100 mA/cm 2 . When used as anode for direct urea fuel cell (DUFC), it could reach a maximal power density as high as 3.4 mW/cm 2 with an OCV of 0.76 V. The CA-Ni 5 P 4 @NiO x /NF also exhibited excellent activity for hydrogen evolution reaction (HER), with -0.089 V (vs. RHE) to deliver a current of 10 mA/cm 2 . The electrolyzer constructed with CA-Ni 5 P 4 @NiO x as both anode and cathode could run for more than 10 h at a high current load about 100 mA/cm 2 without appreciable potential change, indicating the superb stability of the CA-Ni 5 P 4 @NiO x electrode. Our work provides new insights for understanding as well as the development of advanced electrode for DUFC and urea electrolysis.
研究领域:
材料科学
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电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jing Yu,Yumeng Tian,Zaiwen Lin,Qi Liu,Jingyuan Liu,Rongrong Chen,Hongsen Zhang,Jun Wang
Combining a variety of factors to optimize the performances of electrocatalysts has become a new breakthrough for the development of low-cost electrolytic catalysts. In this work, we constructed N-doped carbon fibers as the substrate, which could provide high electronic conductivity and large surface area for the load of active catalysts, as well as close incorporation. The nanosheets morphology of NiSe 2 /Ni 5 P 4 is conducive to enlarging the specific surface area and exposing more active sites. The electrical conductivity is improved by the selenide and carbon nano-fiber substrate. The multiple features, including the unique structure characteristics, heterostructure of NiSe 2 and Ni 5 P 4 , and high electroconductivity , endow NiSe 2 /Ni 5 P 4 with superior catalytic activity towards water splitting. As a result, the overpotentials at the cathode current density of 10 and 100 mA cm −2 upon NiSe 2 /Ni 5 P 4 nanosheets are 112 and 350 mV in 0.5 M H 2 SO 4 . For oxygen evolution reaction (OER), the overpotential of NiSe 2 /Ni 5 P 4 nanosheets at a current density of 10 mA cm −2 in alkaline electrolyte is 316 mV. Furthermore, the bifunctional NiSe 2 /Ni 5 P 4 nanosheets exhibit excellent working stability for both HER, OER and overall water splitting, showing potential application in hydrogen energy.
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
AICHE JOURNAL
·
2023
·Vol. 69
·期 10
·e18153
·
IF 3.7
Jiahui He,Suiqin Li,Chun Li,Kai Li,Yinjie Xu,Mengxin Wang,Shuying Zhao,Jiefeng Zhang,Xing Zhong,Xiaonian Li,Zhengbin Zhang,Jianguo Wang
The exploration of efficient and environmentally friendly oxidation method is highly desirable to overcome the critical problems of poor selectivity and heavy metal contamination for the fine chemicals industry. Herein, a self-supported three-dimensional (3D) Se Ni 5 P 4 nanosheet electrocatalyst was rationally designed and fabricated. Benefiting from the synergistic effect of aminoxyl radical and mesoporous Se Ni 5 P 4 /graphite felt (GF), an excellent performance of ≥98% selectivity and 33.12 kg (m −3 h −1 ) space–time yield was obtained for sterol intermediate oxidation with the enhanced mass transfer effect of the continuous flow system. The doping of anionic selenium and phosphorus modulated the electronic structure of Se Ni 5 P 4 , and the oxyhydroxides generated by surface reconstruction accelerated the turnover of 2,2,6,6-tetramethyl-1-piperidine N -oxyl (TEMPO), thereby enhancing the intrinsic electrocatalytic activity. A scale-up experiment was conducted with stacked-flow electrolyzer demonstrated the application potential. This work provided an efficient synergistic electrocatalytic strategy to facilitate rapid electron and mass transfer for electrochemical alcohol oxidation and highlighted the potential for practical electrosynthesis applications.
研究领域:
化学工程
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环境科学
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材料科学
✓ 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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ying Li,Yanyan Wu,Hongru Hao,Mengke Yuan,Zhe Lv,Lingling Xu,Bo Wei
Oxygen evolution reaction (OER) is a key step for electrochemical water splitting and understanding the surface reconstruction of OER pre-catalysts is of vital importance. Herein, hybrid Ni 5 P 4 @FeP nanosheet arrays were evaluated as promising OER pre-catalysts. The dynamic surface evolution was probed by in situ Raman spectroscopy, which revealed that Ni 5 P 4 @FeP was rapidly reconstructed to NiFe 2 O 4 during the anodic scan. The structural instability of amorphous NiFe 2 O 4 led to partial reconstitution to Ni/FeOOH at high oxidation potentials. As-formed Ni/FeOOH@NiFe 2 O 4 hybrid with high structural reversibility was established as a truly active species, which exhibited excellent alkaline OER performance with a low overpotential of 205 and 242 mV under current densities of 10 and 100 mA cm −2 , respectively. This work provides a facile strategy to in situ construct an amorphous spinel/oxyhydroxide hybrid structure using electrochemical activation that holds strong promise for potential application in electrochemical water splitting and related energy devices.
研究领域:
电化学
·
材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 8
·085004
·
IF 2.07
Tiantian Zhang,Jiaye Chen,Jing Bai,Dongsheng Geng
Transition metal phosphides are perceived to be excellent electrocatalysts and have gradually become the primary candidates for highly efficient energy conversion devices. Coral-like Ni2P-Ni5P4 polymorphs with observable heterointerfaces were synthesized via hydrothermal method followed by low-temperature phosphidation. The phase structures and the electronic interaction of the heterointerfaces have been identified by X-ray diffraction and X-ray photoelectron spectroscopy. The resulting Ni2P-Ni5P4 catalyst exhibited a reasonable overpotential of 107 mV and a superior low overpotential of 238 mV at 10 mA cm−2 for hydrogen evolution reaction and oxygen evolution reaction in 1 M KOH, respectively. In addition, excellent water-splitting performance of 10 mA cm−2 at a low overpotential of 348 mV was obtained by combining the Ni2P-Ni5P4/NF as both cathode and anode, which is lower than that of the Pt/C and RuO2 catalyst couple. Such impressive performance might be ascribed to effective heterointerfaces of Ni2P-Ni5P4 polymorphs.
研究领域:
材料科学
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化学
·
电化学
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）