JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2024
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IF 4.3
Caimin He,Li Li,Ping Yin,Ting Lei
It has been critical and challenging to develop non-precious transition-metal-based eletrocatalysts with low-cost and long-term durability for efficient water splitting. Herein, self-supported nitrogen-doped tungsten carbide on iron-nickel foam (N-WC@INF) with three-dimensional flower-like structure was prepared by a simple hydrothermal reaction followed by simultaneous nitridation and carbonization . The resulting N-WC@INF exhibits an overpotential of 103 mV at a current density of 10 mA cm −2 in alkaline media and a low Tafel slope of 47 mV dec −1 , accompanied by a negligible loss of overpotential after 30 h consecutive hydrogen evolution reaction (HER). Additionally, N-WC@INF shows promising activity for oxygen evolution reaction (OER) with an overpotential of 224 mV at 10 mA cm −2 and a low Tafel slope of 22 mV dec −1 .
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
ACS Applied Energy Materials
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2021
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IF 6.024
Caiyun Sun,Qiantong Song,Jinglei Lei,Dan Li,Lingjie Li,Fusheng Pan
The preparation approaches of highly efficient FeNi (oxy)hydroxide electrocatalysts for oxygen evolution reaction (OER) are usually complicated and high cost. Here, we develop a simple and cost-effective corrosion method to in situ fabricate the amorphous FeNi (oxy)hydroxides with an optimal Fe/Ni atomic ratio as highly efficient OER electrocatalysts. The corrosion process took place in a HCl solution at room temperature, which simultaneously changed the chemistry and morphology of the FeNi (oxy)hydroxide electrocatalysts. The as-fabricated amorphous FeNi (oxy)hydroxide nanosheets exhibit enhanced electrocatalytic performance in the alkaline OER process with a low overpotential of 231 mV at a current density of 20 mA cm–2, a Tafel slope of 62.9 mV dec–1, and long-term (more than 60 h) durability, which is superior to most electrocatalysts reported and the commercial catalyst IrO2. The corrosion method proposed in this work sheds insights into economically fabricating amorphous FeNi (oxy)hydroxide catalysts toward high-performance electrocatalysis.
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
LANGMUIR
·
2025
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IF 3.9
Deke Li,Xionggang Chen,Zongbin Ni,Jinxia Huang,Zhiguang Guo
Materials with superhydrophobic surfaces have the potential for anti-/deicing, but they are plagued by low solar energy and weak mechanical durability. Herein, an encapsulated phase-change microparticle is first designed by integrating photothermal conversion and thermal storage during phase change. The photothermal conversion efficiency of the phase-change microparticles is up to 93.8% due to the full-spectrum absorption capability, and the photothermal property retains excellent reversibility and stability after three cycles. Then, based on the phase-change microparticles, a durable photothermal phase-change superhydrophobic composite material (DSCM) is constructed by filling polyimide (PI) aerogel into the dodecahedral iron–nickel foam, which has excellent anti-/deicing ability at a temperature of −20 °C and a humidity of 30–40% due to the synergistic enhanced strategy, superhydrophobicity, and photothermal capability. The compressive strength of the DSCM is up to about 12.3 MPa, and the friction coefficient and wear rate are as low as 0.026 and 1.806 × 10–4 mm3/Nm, respectively, retaining superhydrophobicity after 1 h cycle wear. The DSCM with the antifriction and wear resistance system provides a novel approach to design photothermal phase-change superhydrophobic materials, which expands the anti-icing applications under harsh conditions, such as low temperature, high humidity, pressure, and friction.
研究领域:
材料科学
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纳米技术
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表面工程
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热能存储
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机械工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
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2024
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IF 5.8
Xiaoqian Ma,Yu Liu,Yi Zhao,Xiaohong Chen,Junyang Leng,Anlong Zhang,Daomei Chen,Kai Xiong,Jiaqiang Wang
The photocatalysis self-Fenton systems by coupling photocatalysis and Fenton technology overcome the limitations of conventional Fenton reactions by in-situ generation and activation of H2O2. While a considerable amount of iron sludge is still produced. In this study, we develop a novel self-cycled photocatalytic Fenton process for the degradation of organic pollutants via an iron-nickel foam-supported MnS nanosheet (MnS/INF). Without the external addition of both H2O2 and ferrous ions, MnS/INF 3D Z-scheme heterojunction exhibited an extremely high H2O2 production rate of 25.4 mM h-1 g-1 under visible light irradiation, which is 2119 times than those reported photocatalysis self-Fenton system in the literature. The photogenerated electrons of MnS/INF can participate in the Fe2+/Fe3+ cycle process to promote H2O2 activation, significantly enhancing the catalytic performance owing to the formation of a 3D Z-scheme heterojunction. DFT calculations indicate that MnS/INF can lower the energy barrier of *OOH formation and result in an enhanced photocatalytic activity of H2O2 production. Magnetic MnS/INF was easily recycled, remained very stable, and mitigated the extra undesirable Fe-containing sludge and only little iron sludge (0.43 mmol/L) is produced after nine cycles of reuse. Furthermore, a large (100 cm2) MnS/INF was used for an unassisted solar-driven in situ photocatalytic H2O2 production and rapid degradation of RhB with requirements for only water, oxygen and sunlight. In addition, MnS/INF also exhibited good performance in real wastewater containing fluoronitrobenzene from a factory (initial COD 2310 mg/L) and wastewater from sewage treatment station (initial COD 106 mg/L). This work may provide leverage to minimize iron sludge from the Fenton reaction's source.
研究领域:
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Changhui Liang,Yuxin Zhang,Jun Shen,Xiaoqiang Zhang,Huixiang Li,Songhai Xie,Yongxin Li,Z. Conrad Zhang
The development of bifunctional electrocatalysts with high efficiency for overall water splitting is still a challenging task. In this work, we introduce a novel one-step synthesis method for Pt/NiFe layered double hydroxide (LDH) on an iron-nickel foam (INF) substrate under mild conditions. This method eliminates the need for additional Ni or Fe ions and facilitates in-situ etching and growth processes under mild conditions, resulting in a higher active surface area, well-dispersed low-loading Pt nanoparticles, and a self-supported electrode without binders. These features collectively enhance electron transfer and catalytic activity for both HER and OER. The Pt/NiFe LDH/INF exhibits remarkable water splitting performance, requiring a cell voltage of only 1.44 V at10 mA cm −2 when used as both anode and cathode. Additionally, it remains stable at 20 mA cm −2 for at least 16 h. The exceptional water splitting activity of Pt/NiFe LDH/INF in alkaline solution can be attributed to the synergistic effects of Pt and NiFe LDH, which improve the hydrogen evolution reaction and oxygen evolution reaction efficiencies. The results provide valuable insights into designing bifunctional electrocatalysts with low Pt loading for optimal water splitting performance at low operating cost.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）