ACS Omega
·
2020
·
IF 2.87
Wandi Kuang,Xiangjian Meng,Caihong Wang,Bhusankar Talluri,Tiju Thomas,Chunjie Jiang,Siqi Liu,Minghui Yang
Nitridation of CoWO4/CdS nanocomposite results in the formation of metal nitrides on the surface of CdS. The high electrical conductivity, appropriate binding energy for hydrogen, and Pt-like properties of the surface nitrides promote the H2 evolution performance. Therefore, the optimal performance of nitrided CoWO4/CdS (CoWO4/CdS-N, 3650 μmol·h–1·g–1) is higher than that of Pt/CdS (2948 μmol·h–1·g–1).
研究领域:
材料科学
·
能源化学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Caihong Wang,Weiliang Qi,Ying Zhou,Wandi Kuang,Tamil Azhagan,Tiju Thomas,Chunjie Jiang,Siqi Liu,Minghui Yang
Efficient semiconductor-cocatalyst junctions are of direct relevance to solar energy based fuel generation. Here, Ni-Mo ternary nitrides based one-dimensional hierarchical structures (In 2 S 3 -Ni 0.2 Mo 0.8 N(Ni)) have been successfully prepared and used to achieve visible light driven H 2 evolution. Because of the metallic-like properties of the transition metal nitrides, Ni 0.2 Mo 0.8 N(Ni) as co-catalysts can promote photo-generated charge-carriers transportation/separation and decrease the overpotential of H 2 -evolution. Thus, the photocatalytic property of optimal 1 wt% In 2 S 3 -Ni 0.2 Mo 0.8 N(Ni) exhibits a hydrogen evolution rate of 614.2 μmol g -1 h −1 , which is about 10 times as high as that of blank In 2 S 3 (61.4 μmol g −1 h −1 ). Besides, the pure Ni 0.2 Mo 0.8 N shows higher co-catalytic properties than Ni 0.2 Mo 0.8 N(Ni). This indicates that the metallic Ni (and related species) lowers the co-catalytic role of ternary nitrides. Another robust indication of this is the fact that In 2 S 3 -Ni 0.2 Mo 0.8 N nanohybrid displays about 2 times higher H 2 evolution rate than In 2 S 3 -Ni 0.2 Mo 0.8 N(Ni).
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Peilong Zhou,Dongxu Yao,Hanqin Liang,Yongfeng Xia,Yu-Ping Zeng
Lithium–Sulfur battery is deemed as one of the most promising next-generation energy storage systems. Identifying the reduction of soluble lithium polysulfides (LiPSs) is critical for rational material designs for Lithium–Sulfur batteries. In this work, a simple molten-salt method is applied to synthesize titanium nitride/silicon nitride (TiN–Si 3 N 4 ) core-shell nanoparticles to inhibit soluble polysulfides shuttling. This Ti-reacted strategy has outstanding advantages such as facile and recyclable preparation process, tunable TiN morphology, and good polysulfide adsorption. With the modified separator, Li–S cells exhibit an outstanding initial capacity of 1243 mA h g −1 at 0.5C, good rate capacity of 782 mA h g −1 at 2C, and high capacity retention of 49.2% after 500 cycles. This low-cost and eco-friendly Ti-reacted strategy provides a practical route for the actual application of separator modification in the field of lithium-sulfur battery.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Yupeng Shi,Dan Li,Haoxu Si,Zhiyang Jiang,Mengyuan Li,Chunhong Gong
High-efficiency and temperature-insensitive microwave absorbing materials (MAMs) are ideal for high-temperature electromagnetic attenuation. Herein, the titanium nitride/boron nitride (TiN/BN) composite with TiN as the loss unit and BN as the impedance matching unit has been constructed by the in-situ synthesis method. The insulating BN not only effectively regulates and optimizes the conductivity and impedance matching of the material but also imparts steady cyclic microwave absorption properties. The steady dielectric loss ensures that TiN/BN composite has robust high-temperature absorption properties at X-band, with a minimum reflection loss (RL min ) of −16.74 dB at 873 K and an effective absorption bandwidth (EAB) of 3.26 GHz in the temperature range of 293–873 K. Compared with the TiN/SiO 2 absorbers with a single system, the TiN/BN/SiO 2 composite keeps reliable high temperature absorbing properties at 873 K. This work confirms that wave-transparent materials for dielectric property modulation can resolve poor temperature stability of effective absorption and non-reusability for high-temperature absorbing materials, providing inspirations for designing efficiency high-temperature microwave absorbers.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 14
·3092-3103
·
IF 5
Dechao Wang,Hang Zhao,Jianglin Tu,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Rong Chen,Qiang Liao
Efficient utilization of heat generated by photothermal conversion and enhancement of mass transfer are crucial for boosting photo–thermo-catalytic hydrogen production. Herein, an interfacial reactor with potassium-doped polymeric carbon nitride/titanium nitride (PPCN/TiN) is developed for photo–thermo-catalytic hydrogen production. The PPCN/TiN with broad light absorption exhibits not only good photocatalytic activity but also excellent photothermal conversion. Remarkably, the interfacial reactor design can efficiently reduce the dissipation of the heat generated by photothermal conversion to the solution, which increases the running temperature. Moreover, the mass transfer can be enhanced because the generated hydrogen can directly escape from the top. Therefore, the hydrogen production rate of the interfacial reactor is much higher than that of the conventional suspension reactor, presenting an increase of 81%. This study provides a new method for photo–thermo-catalytic hydrogen production by optimizing energy and mass flow.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 49
·28851-28856
·
IF 3.049
Zhenzhen Ou,Feng Gao,Huaijun Zhao,Shumeng Dang,Lingjian Zhu
The present work aims at studying the thermal and dielectric properties of addition-cure liquid silicone rubber (ALSR) matrix composites using boron nitride (BN) and aluminum nitride (AlN) as a hybrid thermal conductive filler. Composite samples with different filler contents were fabricated, and the density, thermal conductivity, thermal stability, dielectric properties, and volume resistivity of the samples were measured. According to the experimental results, the density, thermal conductivity, dielectric constant and dielectric loss tangent values all increased with the increasing addition of filler. When the weight fraction of hBN filler was 50 wt%, the thermal conductivity of composites was 0.554 W (m−1 K−1), which is 3.4 times higher than that of pure ALSR. The corresponding relative permittivity and dielectric loss were 3.98 and 0.0085 at 1 MHz, respectively. Furthermore, TGA results revealed that the AlN/BN hybrid filler could also improve the thermal stability of ALSR. The volume resistivity of ALSR composites was higher than that of pure ALSR. The addition of fillers improved the thermal properties of ALSR and had little effect on its insulation properties. This characteristic makes ALSR composites attractive in the field of insulating materials.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 8
·5175-5181
·
IF 1.134
Li Ruiqing,Xu Chenyang,Jiang Xiangfen,Bando Yoshio,Wang Xuebin
Developing high-performance nonprecious electrocatalysts for oxygen evolution reaction (OER) is of great importance, but it remains a challenge. In this paper, we synthesize a porous monolithic catalytic electrode, which is transition metal nitride, Ni3FeN, constructed on
a 3D network-like support of the strutted graphene foam (Ni3FeN/SG). The obtained Ni3FeN/SG electrode shows the excellent catalytic activity and the durability for OER in alkaline solution, owing to iron incorporation, high electrical conductivity and 3D network-like
structure of strutted graphene. It requires small overpotential (226 mV) to actuate 10 mA cm−2, superior to most recently developed catalysts and commercial RuO2. The fabrication strategy provides a substantial way to expand 3D porous monolithic electrodes for various
electrocatalytic applications.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Tuzhi Xiong,Jingting Li,Jagadish Chandra Roy,Malcolm Koroma,Zhixiao Zhu,Hao Yang,Lei Zhang,Ting Ouyang,M.-Sadeeq Balogun,Mohammad Al-Mamun
The development of single electrode with multifunctional purposes for electrochemical devices remains a symbolic challenge in recent technology. This work explores interfacially-rich transition metal nitride hybrid that consist of nickel nitride and vanadium oxynitride (VO 0.26 N 0.52 ) on robust carbon fiber (denoted CF/Ni 3 N/VON) as trifunctional electrode for hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and sodium ion batteries (SIBs). The as-prepared CF/Ni 3 N/VON exhibits low HER overpotential of 48 mV@10 mA cm −2 , OER overpotential of 287 mV@10 mA cm −2 , and sodium-ion anode storage reversible capacity of 555 mA h g −1 @0.2 C. Theoretical analyses reveal that the Ni 3 N effectively facilitates hydrogen desorption for HER, increases the electrical conductivity for OER, and promotes the Na-ion storage intercalation process, while the VON substantially elevates the water dissociation kinetics for HER, accelerates the adsorption of OH* intermediate for OER and enhances the Na-ion surface adsorption storage process. Owing to the excellent HER and OER performances of the CF/Ni 3 N/VON electrode, an overall water splitting device denoted as CF/Ni 3 N/VON//CF/Ni 3 N/VON was not only assembled showing an operating voltage of 1.63 V at current density of 10 mA cm −2 but was also successfully self-powered by the assembled CF/Ni 3 N/VON//CF/Na 3 V 2 (PO 4 ) 3 flexible sodium ion battery. This work will contribute to the development of efficient and cost-effective flexible integrated electrochemical energy devices.
研究领域:
材料科学
·
电化学
·
能源存储与转换
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Haotian Tan,Wei Peng,Tao Zhang,Yonghuan Han,Lichang Yin,Wenping Si,Ji Liang,Feng Hou
Polymeric carbon nitride photocatalyst has attracted much attention due to its visible light response and high chemical stability. However, bulk carbon nitride has a wide band gap and low polymerization, limiting its photocatalytic performance for water splitting. Synthesizing highly polymerized carbon nitride with a narrow band gap still remains challenging. Herein, we propose an ionothermal protocol using supramolecular precursors to fabricate highly polymerized wine-red carbon nitride (WRCN) nanosheets. Both theoretical and experimental investigations revealed that the supramolecular precursor with a high C:N ratio leads to an upward shift of the valence band edge, while the ionothermal synthesis promotes a high polymerization degree, leading to a narrow band gap of 1.82 eV for WRCN. Benefiting from enhanced light absorption and charge separation efficiency, WRCN-loaded hematite photoanode exhibits a much higher photocurrent density than both pristine hematite and bulk carbon nitride decorated hematite. This work may provide a novel strategy to manipulate the electronic structures of carbon nitrides for enhanced photoelectrochemical performances.
研究领域:
材料科学
·
光催化
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Ping Li,Ran Chen,Shien Zhao,Wenqin Li,Yunan Lin,Yu Yu
Exploring cost-effective yet high-performance catalysts for dehydrogenation of ammonia borane (AB) is highly desirable for hydrogen economy. Transition metal nitrides (TMNs) have received huge attention in various energy storage/conversion systems, yet utilization for AB dehydrogenation is rarely studied. Herein we propose a green approach to Co doped Ni nitride nanoparticles anchored on reduced graphene oxide nanosheets (rGO/CoNi-N) from a bimetal-organic complex. The resultant rGO/CoNi-N presents outstanding catalytic AB dehydrogenation performance with a turnover frequency (TOF) value of 126.0 min −1 and an activation energy (Ea) of 32.8 kJ mol −1 , rivalling state-of-the-art catalysts. Based on experimental and theoretical investigations, remarkable performance of rGO/CoNi-N can be attributed to full exposure of active sites and favorable mass transfer. Significantly, Co species incorporation in Ni-N can modulate electronic state with upshift of the d-band center, leading to promoted H 2 O adsorption and reduced energy barrier of the rate-determining step (H 2 O dissociation), thereby substantially boosting AB hydrolysis.
研究领域:
材料科学
·
催化化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 25
·2300623
·
IF 19
Jinjin Ban,Hongjie Xu,Guoqin Cao,Yameng Fan,Wei Kong Pang,Guosheng Shao,Junhua Hu
Transition metal nitrides (TMNs) have great potential use in energy storage and conversion owing to tunable electronic and bonding characteristics. Novel iron rich nitrides nanoparticles anchored on the N-doped porous carbon, named as (Co x Fe 1– x ) 3 N@NPC (0 ≤ x < 0.5) are designed here. The synergistic effects of phase transition and electron-spin regulation on oxygen electrocatalysis are testified. A core–shell structure of (Co x Fe 1– x ) 3 N with high dispersibility is induced by an intermediate phase transition process, which significantly suppresses coarsening of the metallic nitrides. The Co incorporation regulates d-band electrons spin polarization. The t 2g 5 e g 1 of Fe II with the ideal e g electron filling boosts intrinsic activity. (Co 0.17 Fe 0.83 ) 3 N@NPC with optimal cobalt content holds electronic configuration with moderate e g electron filling ( t 2g 5 e g 1 ), which balances the adsorption of *O 2 and the hydrogenation of *OH, improving bifunctional catalytic performances. Both liquid and solid-state zinc–air batteries assembled based (Co 0.17 Fe 0.83 ) 3 N@NPC cathodes substantially deliver higher peak power density and remarkable energy density.
研究领域:
材料科学
·
电化学
·
能源存储与转换
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产品关联
DOI
高影响因子
Communications Materials
·
2025
·Vol. 6
·期 1
·1-9
·
IF 9.6
Luo Tao,Li Shen-Ao,Chen Liu-Cheng,Zhong Guo-Hua,Lin Hai-Qing,Chen Xiao-Jia
The hydrides based on transition metal nitrides are believed to be potential candidates of low-pressure superconductors. However, the relevant theoretical and experimental studies are lack. Here, we report a theoretical and experimental study of the superconductivity in Zr-N-H system. Two high-pressure phases of P 6 3 / m m c -ZrNH 2 and \(F\bar{4}3m\) -ZrNH are found to be stable. The superconducting transition temperature of the former is theoretically predicted to be relatively low with the values of 15–17 K, while the transition temperature of the latter is higher, close to 40 K at megabar pressures. The difference in transition temperature values mainly comes from the different forms of H in hydrides. To examine this theoretical prediction, we synthesize Zr-N-H ternary hydrides experimentally at high pressures by laser heating. The resistance measurements confirm the superconductivity of P 6 3 / m m c -ZrNH 2 and \(F\bar{4}3m\) -ZrNH. The present results provide a promising avenue for exploring the superconductivity in transition-metal nitrides.
研究领域:
材料科学
·
凝聚态物理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）