Nano Research
·
2016
·Vol. 9
·期 11
·3346-3354
·
IF 8.893
Yang Na,Tang Chun,Wang Kunyang,Du Gu,Asiri Abdullah M.,Sun Xuping
Developing efficient water-splitting electrocatalysts, particularly for the anodic oxygen evolution reaction (OER), is an important challenge in energy conversion technologies. In this study, we report the development of iron-doped nickel disulfide nanoarray on Ti mesh (Fe 0.1 -NiS 2 NA/Ti) via the sulfidation of its nickel–iron-layered double hydroxide precursor (NiFe-LDH NA/Ti). As a three-dimensional OER anode, Fe 0.1 -NiS 2 NA/Ti exhibits remarkable activity and stability in 1.0 M KOH, with the requirement of a low overpotential of 231 mV to achieve 100 mA·cm −2 . In addition, it exhibits excellent activity and durability in 30 wt.% KOH. Notably, this electrode is also efficient for the cathodic hydrogen evolution reaction under alkaline conditions.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ruihao Tang,Wei Hong,C. Srinivasakannan,Xuelin Liu,Xin Wang,Xinhui Duan
Silica aerogel and Fe doped silica aerogel composite were synthesized by sol–gel method adopting ambient pressure drying method. The crystal structure, surface morphology, pore structure, surface functional groups and elemental composition of silica aerogel prepared with different concentrations of Fe 3+ were characterized by XRD, SEM, TEM, BET, FTIR, XPS and Zeta potential analysis. The specific surface area of the composite aerogel was found to decrease with the increase addition amount of FeCl 3 . The optimal composite aerogel adsorbent had a surface area of 240 m 2 /g with well-developed mesoporous network, which possessed a maximum malachite green(MG) adsorption capacity of 1592 mg/g, as compared to virgin silica aerogel of 1250 mg/g. Adsorption capacity for large molecules like MG is very low for the most popular adsorbent such as high surface area activated carbon, which is usually the first-choice adsorbent for wastewater treatment. Such high adsorption capacitiy of the silica aerogel composite is highly promising as it is on the classification of low-cost adsorbents, which can serve to be far better alternative for waste water treatment applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Qing Zhang,Yi Zhai,Fumin Wang,Xubin Zhang,Guojun Lv,Yongkui Liu,Mengyue Li,Mengyao Li
Hierarchical Fe-doped MFI/MCM-41 composites (Fe-HMZs) were one-pot hydrothermal synthesized by partial transformation strategy using conventional CTAB as a dual-functional template. The hierarchical Fe-doped MFI/MCM-41 composites possess ordered mesopores and crystallized MFI structure. The effect of addition amount of NaOH and CTAB as well as the type of the alkali source on the formation of hierarchical Fe-MFI/MCM-41 composites have been investigated in detail. In addition, the temperature-gradient treatment plays the vital roles in the formation of MFI and the possible formation mechanism has been proposed. The obtained hierarchical Fe-HMZ-40 sample exhibits outstanding catalytic performance for phenol hydroxylation and 48% of phenol conversion as well as 89% of dihydroxybenzene selectivity could be achieved, which are ascribed to the more accessible active sites endowed by the significant diffusion ability of ordered mesopores. Compared with Fe-MCM-41 sample, the hydrothermal stability is improved because of the presence of MFI structure.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 43
·435707
·
IF 3.551
Zewei Hao,Pengkun Wei,Hongzhi Kang,Yang Yang,Jing Li,Xue Chen,Donggang Guo,Lu Liu
Developing cost-effective electrocatalysts for water electrolysis is a promising strategy to enhance conversion and storage efficiency of sustainable energy. Transition metal oxides have been considered as alternative oxygen evolution reaction (OER) catalysts to replace noble metal-based catalysts. Here, we report a series of Fe-doped NiCo2O4 (NCO) nanowires with different Fe-doped concentrations, synthesized by a facile solvothermal and calcinations process, as high-efficiency electrocatalysts for OER. Due to abundant catalytically active sites, high-charge transport capability and specific surface area, these as-obtained NCO nanowires exhibit low overpotential and small Tafel slope. Specifically, NCO-0.1 shows the outstanding OER performance with a low overpotential of 297 mV at a current density of 10 mA cm−2 and a small Tafel slope of about 68 mV dec−1 in 1.0 M KOH. This study offers a promising electrocatalyst for the OER in water splitting.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Qi Feng,Yanbing Sun,Huimin He,Jing Zhao,Fanyuan Meng,FuXing Wang,Dezhou Zheng,Guangxia Wang,Fuqin Deng,Ningbo Yi,Bingjun Jin
Exploring cost-effective and high-performance electrocatalysts for oxygen evolution reaction (OER) is quite significant for utilizing renewable energies by converting them to green hydrogen energy. ZnCo 2 O 4 spinel oxide has drawn a wide attention in water electrolysis field owing to its earth abundance, low cost and eminent electrocatalytic activity. However, it still has a great room to boost its OER catalytic activity due to the low electrical conductivity and restricted active sites of ZnCo 2 O 4 catalyst. Herein, a facile, easy-scalable and environmental-friendly quenching method is exhibited to achieve surface Fe doped and oxygen vacancy generated ZnCo 2 O 4 by instantaneous cooling in Fe(NO 3 ) 3 solution. As a result, the quenched ZnCo 2 O 4 catalyst shows a vastly improved OER activity in alkaline electrolyte, only requiring an overpotential of 332 mV to reach 10 mA cm −2 , which is much lower than that of un-quenched ZnCo 2 O 4 (405 mV). Our results manifest that quenching treatment can endow an active Fe amorphous layer, a higher ratio of Co 3+ states and more abundance oxygen vacancies for ZnCo 2 O 4 spinel oxide, thus possessing a higher OER activity. Our work offers an effective path for the regulation of metal oxides and its application in energy catalysis field.
研究领域:
材料科学
·
能源催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Xudong Zhao,Xiangxi Wang,Lei Chen,Xianglong Kong,Zhi Li,Ying Zhao,Zhuoyan Wu,Tingyu Wang,Zhiliang Liu,Piaoping Yang
Exploring low-cost and high-activity transition metal-based electrocatalysts for oxygen evolution reaction (OER) is critical toward mass hydrogen generation by water splitting. Herein, a cheap Fe element doped flower-like nickel sulfides catalyst (Fe-NiS/NiS 2 ) is designed and synthesized through facile electrostatic adsorption and sulfuration methods. It is investigated that the Fe doping effectively induces the lattice contraction of nickel sulfides and regulates the phase composition and heterogeneous interfaces, thus enabling high intrinsic OER activity. The Fe-NiS/NiS 2 catalyst shows a high electrochemically active surface area of 150 cm 2 , a small overpotential of 361 mV at 100 mA cm −2 and a low Tafel slope of 61.5 mV dec -1 . Furthermore, the Fe-NiS/NiS 2 exhibits a very excellent structure and performance stability without current attenuation for 24 h at 1.50 V versus reversible hydrogen electrode. This work provides an important insight for the exploitation of low-cost and high-performance OER catalysts with cheap Fe element doping metal sulfides.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Wenwu Zhou,Yue Liu,Qi Sun,Jianyong Ye,Long Chen,Jia Wang,Guiqin Li,He Lin,Yuanqing Ye,Weifan Chen
A new series of orange highly near-infrared reflective pigments based on Fe-doped La2W2O9 were effectively fabricated via solution combustion synthesis. The acquired pigment powders were characterized by powder X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, ultraviolet–visible–near-infrared spectrophotometry, and CIE 1976 L*a*b* color scales. Then, the energy consumption of the air-conditioning system was simulated based on EnergyPlus software. The results showed that the doping of Fe3+ ions will change the color of the pigment from white to orange. Meanwhile, the band gaps of La2W1.85Fe0.15O9-δ and La2W1.8Fe0.2O9-δ shifted from 3.71 to 3.07 eV and 2.96 eV, respectively. The typical La2W1.85Fe0.15O9-δ pigment powders showed the highest near-infrared reflectance of 89.25% between 700 and 2500 nm and impressive color (L* = 74.20, a* = 22.69, and c* = 22.42). The simulation results illustrated that the homeowner could save $7.32 per month by coating the walls and roofs of the building with the energy-saving paint composed of La2W1.8Fe0.2O9-δ. Excellent chemical stability and high near-infrared reflectance made the synthesized pigments a potential candidate for energy-saving coatings.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Jinxian Feng,Xiongwei Zhong,Mingpeng Chen,Pengfei Zhou,Lulu Qiao,Haoyun Bai,Dong Liu,Di Liu,Yu-Yun Chen,Weng Fai Ip,Shi Chen,Jun Ni,Detao Liu,Hui Pan
Oxygen evolution reaction (OER) is an irreplaceable reaction as a half-cell reaction in various electrocatalytic systems . However, the four-electron transfer process makes it sluggish. Although many OER electrocatalysts have been developed, most of them are relatively expensive. Herein, we report a Fe 3+ -incorporated defective oxidized graphite (OGP) (Fe 3+ -OGP) as electrocatalyst for OER, which is obtained by a simple electrochemical oxidation of graphite paper (GP) in the Fe(NO 3 ) 3 solution. We find that the defects with oxygen-functional groups are achieved and Fe 3+ is mainly combined with the C–O–C group after the anodization . Fe 3+ -OGP shows a low overpotential of 1.64 V at 10 mA cm −2 , a stability up to 40 h at 40 mA cm −2 , and a Faraday efficiency of > 97% in an alkaline solution. Most importantly, we show that the positively charged surface of Fe 3+ -OGP can enhance the adsorption of O species dramatically and promote OER in alkaline conditions greatly. Our study may provide an alternative way to develop novel electrocatalysts based on low-cost materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 19
·e202301102
·
IF 2.1
Lina Hu,Xinyu Sun,Ying Wang,Yang Liu,Shiqing Zhang,Fang Liu,Ying Li,Yanming Xue,Jun Zhang,Chengchun Tang
Graphical We report the synthesis of iron (Fe)-doped Ni 4 Mo intermetallic compound with hierarchical nanorod assemblies on nickel foam, which significantly improve the catalytic performance for OER. Density functional theory (DFT) calculation shows that the addition of Fe can significantly reduce the adsorption energy of the intermediate, thus facilitating the OER activity. It is great significance to explore rich and efficient transition metal-based electrocatalysts for the electrolysis of water. Nickel-molybdenum (Ni−Mo) alloy is considering as one of the most promising electrocatalysts for hydrogen evolution reactions (HER) in alkaline electrolyte, but its catalytic performance for oxygen evolution reaction (OER) is still unsatisfactory. Heteroatom doping by interfering with the electronic structure of the catalysts has been considered to be an effective method to enhance electrocatalytic activities. Herein, we report the synthesis of iron (Fe)-doped Ni 4 Mo intermetallic compound with hierarchical nanorod assemblies on nickel foam by hydrothermal and hydrogen-induced methods, which significantly improve the catalytic performance for OER. The as-prepared Fe−Ni 4 Mo/NF shows remarkable activity for alkaline oxygen evolution reaction, requiring only a low overpotential of 271 mV to achieve a current density of 100 mA cm −2 . Such performance is significantly better than that of pristine Ni 4 Mo/NF with overpotential of 400 mV. Density functional theory (DFT) calculation shows that the addition of Fe can significantly reduce the adsorption energy of the intermediate on the catalyst surface, thus facilitating the OER activity. Moreover, an alkaline electrolyzer composed of Fe−Ni 4 Mo/NF as cathode and anode can provide 10 mA cm −2 current density with only 1.48 V extremely low voltage, and shows excellent long-term durability of 24 h. These results highlight a heteroatom incorporation engineering strategy into metallic alloys for electrochemical applications.
研究领域:
材料科学
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电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yuanhua Xiao,Shiwei Zhang,Ya Shen,Jinhui Shou,Yang Kong,Dangcheng Su,Xuezhao Wang,Qingxiang Yang,Dafeng Yan,Chengguo Sun,Shaoming Fang
Co 9 S 8 has been extensively studied as a promising catalyst for water electrolysis. Doping Co 9 S 8 with Fe improves its oxygen evolution reaction (OER) performance by regulating the catalyst self-reconfigurability and enhancing the absorption capacity of OER intermediates. However, the poor alkaline hydrogen evolution reaction (HER) properties of Co 9 S 8 limit its application in bifunctional water splitting. Herein, we combined Fe doping and sulfur vacancy engineering to synergistically enhance the bifunctional water-splitting performance of Co 9 S 8 . The as-synthesized Co 6 Fe 3 S 8 catalyst exhibited excellent OER and HER characteristics with low overpotentials of 250 and 84 mV, respectively. It also resulted in the low Tafel slopes of 135 mV dec −1 for the OER and 114 mV dec −1 for the HER. A two-electrode electrolytic cell with Co 6 Fe 3 S 8 used as both the cathode and anode produced a current density of 10 mA cm −2 at a low voltage of only 1.48 V, maintaining high stability for 100 h. The results of in/ex-situ experiments indicated that the OER process induced electrochemical reconfiguration, forming CoOOH/FeOOH active species on the catalyst surface to enhance its OER performance. Density functional theory (DFT) simulations revealed that Fe doping and the presence of unsaturated coordination metal sites in Co 6 Fe 3 S 8 promoted H 2 O and H* adsorption for the HER. The findings of this study can help develop a strategy for designing highly efficient bifunctional water splitting electrocatalysts.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Bing Hou,Ling Wang,Xinyu Yang,Yuyou Li,Zhuohang Wu,Jingwen Pan,Lei Wang
Cerium-based adsorbent with the merits of variable valence and ample oxygen vacancies was applied for the removal of highly toxic hexavalent chromium (Cr(VI)). However, its cost controllability and recycling stability in practical applications remain to be further explored. Herein, a varieties of bimetallic cerium-based biochar adsorbents (CeFe@BC) were prepared by doping iron (Fe) and loading onto straw-based biochar, and the effects of the introduced Fe and biochar on adsorption performance of cerium-based adsorbent for Cr(VI) were studied. In comparison to pure cerium-based adsorbent (Ce@C), CeFe@BC had a stronger Cr(VI) adsorbability with the maximum adsorption capacity of 57.05 mg/g (25°C). Meanwhile, CeFe@BC had good regeneration stability and environmental friendliness. The adsorption capacity only decreased by 16.11 % after 7 adsorption–desorption cycles, with almost no metal leaching in different pH. Results showed that Fe doping and loading onto straw-based biochar could effectively promote Ce(III) and oxygen vacancy content in Ce@C. Electrochemical and density function theoretical calculations proved that Fe doping and loading onto straw-based biochar could promote the reduction of Ce@C impedance and the increase of current density. In conclusion, Fe doping and loading onto straw-based biochar effectively regulated the intrinsic properties of cerium adsorbent and further accelerated the electron transfer in adsorption. This study shows that bimetallic cerium-based adsorbent is a promising, efficient and stable environmental friendly adsorbent for Cr(VI) removal from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiejie Feng,Liling Wei,Huayi Li,Jianquan Shen
The optimization of intermediate adsorption is pivotal for enhancing the efficacy of catalysts in oxygen evolution reaction (OER). However, many Co-based catalysts exhibit excessive binding energy toward intermediates, thereby restricting the desorption process. To address this issue, we utilized the Co-based vanadates (CoV) as a model and observed that the incorporation of Fe can effectively mitigate the substantial accumulation of intermediates around the catalysts, achieving a balance between the adsorption and desorption. It can be attributed to the Fe-doping, which modulated the electronic structure of CoV, subsequently increasing the catalytic sites and intrinsic activity. As a result, the CoV-Fe exhibited a low overpotential of 260 mV at 20 mA cm −2 , which decreased by 82 mV compared to pristine CoV. Besides, the electrolyzer based on CoV-Fe maintained a low cell of 1.46 V for water splitting and held a considerable attenuation of 4.49 % after 200 h of long-term operation.
研究领域:
材料科学
·
电化学
✓ 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）