Surfaces and Interfaces
·
2024
·
IF 5.7
Longqian Wang,Pan Wang,Shuangqing Li,Huishan Shang,Dan Wang,Yafei Zhao,Bing Zhang
Designing transition metal-based heterointerfaces and creating defects are identified as prospective strategies for substituting the expensive noble metal-based catalysts for realizing efficient water electrocatalysis to alleviate the energy and environmental crisis. Herein, pleated sheet-like NiP 3 -NiB-FeB heterostructure nanoarrays with three-phase heterojunctions and luxuriant defects were developed and grown in-situ on carbon cloth as effective self-supported bifunctional electrocatalysts for water-splitting by a facile one-step solution titration method. As expected, the Ni 3 P-NiB-FeB reveals remarkable electrocatalytic performance, requiring only 134 mV and 275 mV overpotentials to achieve the current density of 10 mA cm −2 for HER and 100 mA cm −2 for OER, respectively, whose performance exceeds most transition metal-based catalysts in previous reports. More encouragingly, the electrolyzer with Ni 3 P-NiB-FeB as a working electrode can attain a current density of 10 mA cm −2 at a low voltage of 1.63 V accompanied by a long cycle stability of at least 36 h. The large specific surface area, abundant heterogeneous phase interfaces, and rich defective sites jointly contribute to the exposure of more active sites, regulation of the regional electron density, and promotion of the electrical conductivity, while the introduction of electronegativity P and electron-deficient B also impart Ni 3 P-NiB-FeB with strong electronic interactions and fast charge transfer, thus endowing Ni 3 P-NiB-FeB with excellent catalytic activity. This work opens up new opportunities in multi-phase heterointerfaces and defects engineering of transition metal-based borides and phosphides as efficient multifunctional electrocatalysts for practical water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Kai Wei,Xiufan Liu,Shiyu Cao,Huijuan Cui,Yu Zhang,Zhihui Ai
In this study, we fabricated a micro-nano structured Fe 2 O 3 @FeB composites by treating commercial Fe 2 O 3 with sodium borohydride. The outside amorphous FeB alloy shell endowed the Fe 2 O 3 @FeB with remarkable Fenton-like performance in organic pollutants oxidation by efficient Fe(III)/Fe(II) cycle. For instance, the pseudo first-order rate constants of RhB degradation using Fe 2 O 3 @FeB as Fenton reagent was 74.6 times that of the Fe 2 O 3 counterpart, the hydroxyl radical generation rate of Fe 2 O 3 @FeB was 1-3 orders of magnitude larger than that of other heterogeneous Fenton reagent. Further mechanistic study unveiled that FeB was oxidized accompanying with Fe(0) and B(0) continuously donated electrons to Fe(III) to secure the efficient generation of surface Fe(II), which could generate additional H 2 O 2 by consecutive single-electron molecular oxygen activation (O 2 →•O 2 − →H 2 O 2 ), leading to enhance •OH production and Fenton-degradation toward typical pollutants. This study provides a facile route for efficient heterogeneous Fenton and strengthens the vital role of molecular oxygen activation on Fenton-like process.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 10
·3036-3046
·
IF 6.1
Shiheng Liang,Liugang Wu,Yiming Wang,Yuqi Shao,Hongyuan Song,Ziliang Chen,Weiju Hao
The construction of high-efficiency long-stable catalytic electrodes for hydrogen by seawater splitting is a huge challenge in the field of green hydrogen generation. Herein, a matrix-type titanium dioxide nanorod (Ti/TiO2) is constructed on the titanium plate (Ti) by one-step oxidative etching, and a two-dimensional self-supporting electrode with good stability and “local photothermal effect” strategy is constructed as a self-supporting electrode by carbon quantum dots (CDs) “inserted” self-growing iron boron (CDs-FeBx@TiO2). Based on the microstructure regulated by CDs, the in situ growth of FeB with high conductivity and high authenticity activity, the effective separation of electron–hole pairs in the TiO2 structure is promoted, and efficient photothermal seawater electrolysis is realized. The performance of hydrogen/oxygen evolution reaction (HER/OER) and overall seawater splitting of the highly active CDs-FeBx@TiO2 electrode increased by 14.7%, 16.2% and 4.4% at 10 mA cm−2 in alkaline simulated seawater. The CDs-FeBx@TiO2 electrode remains durable for 70 days at 100 mA cm−2 and even at industrial current density, and the catalytic activity remained at 93.5%. This work provides a simple way for the preparation of catalytic electrodes with high activity and excellent stability and provides theoretical support for the practical application of high purity hydrogen from seawater.
研究领域:
材料科学
·
可再生能源
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2018
·
IF 2.297
Xiaoxia Sheng,Jingjing Tang,Jiayin Bao,Xiangjun Shi,Weike Su
In the present study, a febuxostat (FEB) solid dispersion was prepared via the solvent evaporation method, and the dispersion's solubility, dissolution rate and oral bioavailability were investigated. To select the appropriate carriers for the FEB solid dispersion, series of preliminary trials were performed on d-α-tocopherol polyethylene glycol 1000 succinate (TPGS), HPMC, PEG4000, PEG6000, Eudragital, PVA, PVP K30, poloxamer188 and poloxamer407. Based on the preliminary trials, TPGS and poloxamer188 were selected as the carriers for the FEB solid dispersion preparation. In addition, a mixture of FEB:poloxamer188:TPGS (1:5:1) exhibited outstanding characteristics; its saturation solubility was 7.31 times (in water), 17.67 times (in pH 1.2), 17.22 times (in pH 4.5), 3.60 times (in pH 6.0) and 1.99 times (in pH 6.8) higher than that of pure crystalline FEB. In an in vitro drug dissolution study, the mixture exhibited a drug release rate that was 1.94 times that of the FEB API. Meanwhile, oral bioavailability, C max and AUC, as evaluated in an in vivo pharmacokinetic study, also showed a notable enhancement.
研究领域:
药剂学
·
药代动力学
·
药物递送系统
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Yuchen Zhang,Peng Zhou,Rongfu Huang,Chenying Zhou,Yang Liu,Heng Zhang,Xiaowei Huo,Jian Zhao,Zhaokun Xiong,Bo Lai
The regeneration of Fe(II) is the rate-limiting step in the Fenton/Fenton-like chain reactions that seriously hinder their scientific progress towards practical application. In this study, we proposed iron boride (FeB) for the first time as a new material to sustainably decompose H 2 O 2 to generate hydroxyl radicals , which can non-selectively degrade a wide array of refractory organic pollutants . Fe(II) can be steadily released by the stepwise oxidation of FeB to stimulate Fenton reaction, meanwhile, B-B bonds as electron donors on the surface of FeB effectively promote the regeneration of Fe(II) from Fe(III) species and significantly accelerate the production of hydroxyl radicals. The low generation of toxic by-products and the high utilization rate of iron species validly avoid the secondary organic/metal pollution in the FeB/H 2 O 2 system. Therefore, FeB mediated Fenton oxidation provides a novel strategy to realize a green and long-lasting environmental remediation.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 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）