Journal of Energy Chemistry
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2019
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IF 5.162
Tian-Tian Chen,Rui Wang,Lin-Ke Li,Zhong-Jun Li,Shuang-Quan Zang
Metal–organic framework (MOF) derived hybrid materials have been developed as an efficient non-noble-metal electrocatalysts for clean energy conversion systems. In this work, a Co-based MOF containing nitrogen and oxygen heteroatoms (Co-NOMOF) mixed with the thiomolybdate [Mo 3 S 13 ] 2− nanoclusters was used to prepare the N, S, O-doped carbon encapsulating Co 9 S 8 and MoS 2 (Co 9 S 8 /MoS 2 @NSOC) nanocomposite by one-step pyrolysis . The Co 9 S 8 /MoS 2 @NSOC nanocomposite exhibited remarkable catalytic performance for hydrogen evolution reaction (HER) with overpotential of 194 and 233 mV in 1 M KOH and 0.5 M H 2 SO 4 solution under 10 mA cm −2 , respectively, which was ascribed to the multiheteroatom-doped hierarchical porous carbon matrix and the synergistic effect of intrinsic activity of Co 9 S 8 and MoS 2 . This work provides new opportunity for developing highly efficient non-precious metal electrochemical catalysts.
研究领域:
材料科学
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能源化学
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电催化领域
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
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2019
·Vol. 186
·期 12
·1-10
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IF 5.479
Huang Shan,Yang Erli,Yao Jiandong,Chu Xu,Liu Yi,Xiao Qi
A rapid, sensitive, and selective fluorometric assay is described for the determination of chromium(VI) in real waters and living cells. The method is making use of nitrogen, phosphorus, and sulfur tri-doped carbon dots (NPS-CDs) which have absorption/emission maxima at 360/505 nm/nm. Cr(VI) has an absorption maximum at 350 nm and causes an inner filter effect (IFE) on the blue fluorescence of the NPS-CDs. The NPS-CDs were hydrothermally synthesized using p -aminobenzenesulfonic acid and tetrakis(hydroxymethyl)phosphonium chloride as precursors. The NPS-CDs were characterized by transmission electron microscopy, X-ray diffraction, and several spectroscopic methods. They are biocompatible and negligibly cytotoxic when tested with HeLa cells and MCF-7 cells even after 48 h of incubation. The NPS-CDs were used as fluorescent probes for Cr(VI). The detection limit is 0.23 μM (three times standard deviation versus slope), and the linear response covers the 1 to 500 μM chromate concentration range. The NPS-CDs were applied to the determination of Cr(VI) in real waters and living cells (HeLa and MCF-7) and gave satisfying results.
Schematic representation of hydrothermal synthesis of nitrogen, phosphorus, and sulfur tri-doped carbon dots (NPS-CDs) for Cr(VI) detection via inner filter effect (IFE). NPS-CDs were applied to the determination of Cr(VI) in living cells (HeLa and MCF-7) with satisfying results.
研究领域:
分析化学
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环境科学
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生物医学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Materials
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2022
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IF 3.985
Fan Jinchen,Zheng Yujun,Zhao Zhongshu,Guo Wenyao,Zhu Sheng
Bimetallic selenides are considered to be the promising high-capacity anode materials for potassium ion batteries (PIBs). However, the dramatic volume fluctuation of K+ ions and pulverization during cycling still limit their practical application in PIBs. Herein, the nitrogen, phosphorus, and sulfur tri-doped carbon (SPNC)-coated bimetallic NiCo2Se4 needle arrays grown on carbon cloth (NiCo2Se4⊂SPNC/CC) prepared as a binder-free anode for PIBs. The polyphosphazene (PSZ) was used as ingenious heteroatoms doping carbon source. The coated SPNC layer derived from the PSZ on the surfaces of NiCo2Se4 needle arrays not only effectively alleviate the volume expansion of NiCo2Se4 but also provide abundant active sites for the storage of K+ ions. As the PIB anode, the NiCo2Se4⊂SPNC/CC could deliver a high reversible capacity of 880.9 mA h g−1 at a current density of 0.1 A g−1. After 500 cycles, the NiCo2Se4⊂SPNC/CC anode still maintains a high reversible capacity of 268.1 mA h·g−1 at a current density of 0.5 A g−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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Hao Han,Xiaomei Wang,Xu Zhang
Doping Fe N C catalysts with heteroatoms has been widely recognized as a most promising way to improve the electrocatalytic activity to achieve the replacement of Pt-based electrocatalysts for efficient oxygen reduction reaction (ORR). However, it is still a challenge to combine delicate control of the catalyst structure with heteroatom-doping to achieve optimal electrocatalytic efficiency. Herein, a strategy of combining chemical vapor deposition (CVD) with dual-template cooperative pyrolysis was rationally designed to synthesize the novel electrocatalyst with densely isolated single Fe atoms scattered on hierarchically ordered porous N and S codoped carbon (ISA-Fe/HOPNSC). The three-dimensional hierarchically ordered interconnected macro/mesoporous structure and uniform sulfur-doping make ISA-Fe/HOPNSC exhibit superb ORR performance in both alkaline and acidic electrolytes with a positive half-wave potential (0.920 V in 0.1 M KOH and 0.795 V in 0.5 M H 2 SO 4 ) as well as outstanding methanol tolerance and long-time stability. As cathode catalyst in Zn-air battery, ISA-Fe/HOPNSC also provides much better maximum power density (210.7 mW cm −2 ) and specific capacity (796.7 mAh g Zn −1 ) than those of Pt/C (112.6 mW cm −2 and 712.6 mAh g Zn −1 ). Remarkably, the synthesis strategy in this work proposes myriad opportunities for combining delicate control of the catalyst structure with heteroatom doping to synthesize high-performance ORR catalysts.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Asad Ali,Yang Liu,Rongcheng Mo,Pinsong Chen,Pei Kang Shen
Developing high performance, good stability and noble-metal-free electrocatalysts for renewable hydrogen evolution reaction (HER) remain a substantial challenge. Herein, we introduce a novel facile one-step in-situ strategy through pyrolysis for the synthesis of Co 2 P nanoparticles encapsulated Boron, Nitrogen, and Phosphorous tri-doped carbon nanotubes (Co 2 P/BNP-CNTs). The synergetic effect between Co 2 P nanoparticles and heteroatom doped CNTs contributes to the remarkable HER performance. The Co 2 P/BNP-CNT-900 electrocatalyst shows a low overpotential of 133 mV at a current density of 10 mA cm −2 and a small Tafel slope of 90 mV dec −1 in 0.1 M KOH media. More importantly, the Co 2 P/BNP-CNT-900 electrocatalyst exhibits superior long-term stability in alkaline solution at −0.25 V versus Reversible Hydrogen Electrode (RHE) for 15 h and up to 1000 cycles with negligible performance loss. Overall, our works suggest a one-pot facile synthesis strategy for rational designing high-performance electrocatalysts with enhanced HER performance.
研究领域:
材料科学
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电化学
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纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lilai Lu,Guoyu Wang,Yangfan Sun,Qingshan Li,Ting Pan,Yuanna Sun
The development of effective oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts is essential for the preparation of high-performance rechargeable zinc-air batteries. Porous carbon nanosheets (Fe/NSCN-900) doped with three elements, Fe, N, and S, were prepared from bacterial cellulose using a simple high-speed mixing-impregnation-high-temperature pyrolysis method for use as highly active electrocatalysts in rechargeable zinc-air batteries. The two-dimensional porous structure of Fe/NSCN-900 grants the material a high electrical conductivity and a large specific surface area, which is conducive to catalysis. The synergistic effect between Fe, N, and S elements endows Fe/NSCN-900 with exceptional ORR and OER electrocatalytic properties. The prepared Fe/NSCN-900 showed good bifunctional electrocatalytic activity with an OER overpotential of 310 mV (η 10 = 310 mV vs. RHE) at a current density of 10 mA cm −2 and obtained high ORR onset potential (0.94 V) and half-wave potential (0.82 V). In addition, when a rechargeable zinc-air battery assembled from Fe/NSCN-900 at a current density of 10 mA cm −2 underwent 1200 cycles (over 400 h), the charging and discharging voltage gaps remained nearly unchanged. This research paves the way for the development of high-performance bifunctional electrocatalysts for next-generation energy conversion and storage devices.
研究领域:
材料科学
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电化学
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能源存储与转换
·
纳米技术
✓ 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）