FUEL
·
2021
·
IF 6.609
Xianglei Liu,Zekai Mu,Chen Sun,Hang Shi,Xianguang Meng,Ping Li,Yueyue Ling,Bo Cheng,Yimin Xuan,Yulong Ding
Solar-driven CO 2 reduction by CH 4 is promising to simultaneously tackle energy shortage and global warming problems by converting two greenhouse gases into fuels. However, serious challenges remain, such as limited light-to-fuel efficiency, high operating temperature, and severe catalyst deactivation. Here, high-performance direct solar-driven CO 2 reduction is demonstrated at relatively low operation temperature (594 °C) based on NiCo-ZIF derived nanostructures. An ultrahigh light-to-fuel efficiency of 32.4% and production rates of H 2 (105.83 min −1 g −1 ) and CO (128.17 mmol min −1 g −1 ) are achieved via photothermocatalysis on Ni 1 Co 2 @C ZIF -Al 2 O 3 catalysts. Excellent light-to-fuel conversion performance can be attributed to the highly dispersed metal particles, decreased apparent activation energy under direct light illumination, increased CO 2 absorption, and promoted dissociation of CH 4 to CH 3 * of NiCo alloy. The carbon deposition rate of NiCo bimetallic catalysts is prominently inhibited compared with pure Ni or Co catalysts due to the change of the reaction path, as confirmed by DFT calculations. This work opens new routes to achieve highly efficient solar-driven CO 2 reduction by CH 4 based on NiCo-ZIF derived alloy nanostructures at relatively low-temperature conditions.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lan Qin,Shan Liu,Jifei Yang,Min He,Jie Yu
The rational modulating of the microstructure in magnetic carbon-based composites is crucial to optimize the electromagnetic wave (EMW) absorption performance. It is challenging for EMW absorbers to simultaneously achieve optimal minimum reflection loss (RLmin) and a broadband effective absorption bandwidth (EAB). In this paper, carbon nanotubes (CNTs)-modified NiCo/CNTs nanosheets were effectively prepared as a new EMW absorption material utilizing NiCo-containing metal-organic framework (MOF) as a sacrificial precursor. As expected, NiCo/CNTs-650 demonstrated both a broadband EAB of 7.04 GHz and the RLmin of − 58.14 dB at 15.9 GHz with a thickness of 2.0 mm. Furthermore, NiCo/CNTs-650 is capable of achieving 30.2 dB m 2 RSC (radar cross section) reduction under an incident angle of 7° via CST, while NiCo/CNTs-700 15 % achieved a reduction of 39.47 dB m 2 at 0 °. These performances outperformed that other CNTs-decorated MOF-derived hierarchical composites previously described. NiCo/CNTs-650 combines the synergistic effects of magnetic loss provided by zero-dimensional (0D) NiCo alloy, dielectric attenuation realized by one-dimensional (1D) CNTs, and optimized impedance matching through two-dimensional (2D) nanosheets with abundant hierarchical interfaces. These studies provide a specialized route for the manufacture of mixed-dimensional hierarchical EMW absorbents with high performance.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-13
·
IF 16.419
Qian Guangfu,Chen Jinli,Yu Tianqi,Luo Lin,Yin Shibin
N-doped graphene-coated structure and mesoporous nano-sheet can efficiently boost active sites and stability for hydrogen and oxygen evolution reaction.
NiCo@C-NiCoMoO/NF exhibits low overpotentials for HER (266 mV) and OER (390 mV) at ± 1000 mA cm −2 .
For water electrolysis, it can hold at 1000 mA cm −2 for 43 h in 6.0 M KOH + 60 °C condition.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Yang Zhao,Qian Wang,Huifang Wu,Lirong Zheng,Zhexi Gao,Xuanlin Guo,Xingzhong Cao,Dianqing Li,Junting Feng
Reductive amination of biomass aldehydes is a vital process to synthesize chemical intermediates primary amine, but the selectivity is severely compromised by the self-condensation of highly reactive imine intermediates. Herein, we proposed a solution by manipulating the adsorption configuration of secondary imine via defect engineering. Specifically, a gradient reduction strategy was used to adjust the driving force of NiCo alloy crystallization, thus motivating the formation of metal vacancy clusters. The primary amine selectivity was raised from 70.9% to 95.1% with defect concentration increased from 36.1% to 42.5% on catalysts. In situ fourier transform infrared spectroscopy (FTIR) and density functional theory demonstrated metal vacancy clusters induced remarkable Ni Co electron transfer, which strengthened electronic coupling between secondary imine with catalyst, resulting in a flat configuration that was conducive to CN bond breakage to guarantee smooth conversion into primary amines. This catalyst exhibited potential real-life application prospects for its low cost, universality in reductive amination of various aldehydes, and long-life reusability.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 14
·5981-5988
·
IF 2.5
Wenting Liu,Feng Wang,Xiaoyu Wu,Zhenzhen Wu
Non-precious metal catalysts have been extensively developed for metal–air batteries and fuel cells with the aim of reducing economic costs in practical applications. This paper reports a strategy involving the loading of biomass-derived nitrogen-doped porous carbon materials with NiCo alloy nanoparticles to fabricate high-performance bifunctional catalysts towards oxygen reduction and evolution reactions. The resulting catalyst demonstrates considerable catalytic activity with exceptional long-term cycling stability and methanol resistance. This material offers a reference strategy for the economical and environmentally sustainable large-scale manufacturing of renewable bifunctional catalysts.
研究领域:
材料科学
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催化化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 38
·385602
·
IF 3.874
Ximing Zhang,Jingyu Wang,Yang Fan,Hengdong Ren,Zhenying Liu,Yanfen Wang,Yin Liu,Hongcun Bai,Lingbing Kong
In this work, we prepared NiCo alloy/C with rhombic dodecahedron structure and superior microwave absorption performance by using ZIF-67 as the raw material. The rhombic dodecahedron NiCo alloy/C was with rough particles on the surface was photographed by field emission scanning electron microscopy. By adjusting the doping amount of Ni and the temperature of pyrolysis, improved the impedance matching of NiCo alloy/C. Specifically, NiCo alloy/C exhibits a minimum reflection loss of −65.48 dB at 13.48 GHz, while the thickness is 1.63 mm. Defects introduced in the Ni doping process and the special rhombic dodecahedral structure can cause multiple loss mechanisms. Therefore, this NiCo alloy/C composite has the potential to be a potential microwave absorber material with lightweight and high microwave absorption properties.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Furui Hu,Hongguang Zhang,Fuzheng Fu,Ying Zhu,Zuqiang Huang,Tao Gan,Huayu Hu,Yanjuan Zhang
Catalytic transfer hydrogenolysis (CTH) of biomass-derived 5-hydroxymethylfurfural (HMF) by non-noble metal composites is a potential method for producing the liquid fuel 2,5-dimethylfuran (DMF). However, rigorous reaction conditions (≥ 240 °C; ≥ 6 h) lead to the deactivation of composite catalysts and limit their industrial application. Herein, a mechanical activation (MA)-enhanced dispersion and layer-by-layer imbedding strategy was created to construct an efficient and stable MA-NiCo@ZrO 2 /NBC composite for selective catalytic hydrogenolysis of HMF to produce DMF. The MA-NiCo@ZrO 2 /NBC composite with strong metal–metal and metal–support interactions exhibited outstanding catalytic performance for the conversion of HMF with formic acid as a hydrogen source, achieving a HMF conversion of 99.3% and a DMF yield of 96.7% at 200 °C for 2 h (96.7 times higher than those by the catalyst without MA treatment). Comparative investigations reveal that the formation of NiCo alloy and fast electron transfer of metal–acid bifunctional sites improved the preferential adsorption of C=O, and the formate intermediate promoting C–O hydrogenolysis also kept the furan ring intact. Moreover, MA-NiCo@ZrO 2 /NBC with stable structure maintained good catalytic activity after eight cycles. This study provides an attractive strategy for developing efficient and stable non-noble metal composites for catalytic upgrading of biomass-derived chemicals under mild conditions.
研究领域:
材料科学
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催化化学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 49
·495706
·
IF 3.5
Ziran Zeng,Yunfan Li,Yilin Zhao,Jun Yuan,Longju Yi,Peilong Li,Gary J Cheng,Feng Liu
Due to the advantages of high porosity, excellent conductivity, and tunable morphology, carbonized metal-organic framework (C-MOF) is expected to become an ideal material for constructing high-performance flexible pressure sensor. Herein, to achieving the suitable morphology of C-MOF for piezoresistive sensors, a rapid thermal process (RTP) was used for carbonization of NiCo-MOF, and the petal-shaped NiCo alloy nanoparticles/nanoporous carbon composites (NiCo-NPCs) were obtained. Compared with NiCo-NPCs carbonized by common thermal process (CTP), NiCo-NPCs carbonized by RTP exhibit a modified morphology with smaller particle size and larger most frequent pore diameter. Due to the modified morphology, the piezoresistive sensor with RTP-carbonized NiCo-NPCs has a high sensitivity of 62.13 kPa–1 at 0–3 kPa, which is 3.46 times higher than that of the sensor with CTP-carbonized NiCo-NPCs. Meanwhile, the sensor shows an ultra-wide range of 1000 kPa, excellent cycle stability (>4000 cycles), and fast response/recovery time of 25/44 ms. Furthermore, the application of the sensor in dynamic loading test, airflow monitoring, voice recognition, and gesture detection demonstrates its great application prospects. In short, this work investigates the application of carbonized NiCo-MOFs in flexible pressure sensors, and provides a new strategy to improve the performance of piezoresistive sensors with porous carbon derived from MOFs.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huiling Zhang,Jingnan Yang,Teng Zhao,Fujun Lan,Yixin Luo,Fei Han,Xianliang Qiao,Qingxin Guan,Mo Qiu,Wei Li
Directional activation of oxygen-containing groups is a crucial challenge in the catalytic conversion of renewable biomass to high-value products. Herein, we fabricated uniform dispersed NiCo alloy nanoparticles by direct reduction flower-like layer double hydroxides (LDHs) precursors. The as-obtained Ni 2 Co 1 AlO exhibited outstanding yield (97.6 %) of tetrahydrofurfuryl alcohol (THFOL) in furfural hydrogenation, which is significantly superior to those of monometallic Ni-based (75 %) and Co-based (0 %) LDH catalysts and even higher than the most noble metal catalysts. The Ni 2 Co 1 AlO showed robust stability, e.g., the catalyst can be recycled up to 10 times without loss of its conversion and selectivity, which is attributed to the ultra-dispersed metal cations in layers and the confined effect of metal oxides. Characterizations and theoretical calculations demonstrate that alloying Ni with Co can downshift the d -band center of Ni in NiCo alloys, which facilitates the H* desorption to improve hydrogenation activity. The unique electronic interactions between Ni and Co facilitated the parallel adsorption of furfural while reduced the energy barriers of the furan ring hydrogenation, promoting the production of THFOL. This work provides a promising strategy of tailoring d -band center, which can shed light on the design of heterogeneous catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
ZiHao Tao,Liuyi Pan,Hedan Yao,Long Chao,Louwei Cui,Chongpeng Du,Yingxia Wang,Yinshang Xi,Dong Li,Wenhong Li
The semi-hydrogenation of acetylene represents a crucial industrial process, with the catalytic conversion of trace acetylene in ethylene-rich streams, achieved without pretreatment, offering a greener and more sustainable approach. A bimetallic NiCo@C catalyst was synthesized through the pyrolysis of a metal-organic framework (MOF) precursor. During pyrolysis, the organic ligands form a uniform carbon layer, effectively protecting the metallic active sites formed. This process yields alloy nanoparticle catalysts characterized by a high surface area and a complete carbon layer. The formation of the NiCo alloy facilitates a geometric isolation of Ni by Co, coupled with electronic modification, which ensures high selectivity for conversion. In addition, the outer carbon layer preserves elements of the original MOF spatial structure, exhibiting a high specific surface area and dispersion, thus enabling the rapid desorption of ethylene post-reaction. Density functional theory (DFT) calculations were employed to explain the semi-hydrogenation mechanism of acetylene on the carbon-layered NiCo alloy. In a flow reactor designed for acetylene hydrogenation, the combination of bimetallic interaction and carbon layer protection produced a catalyst conversion rate of 95 % and a selectivity of 83 %. In conclusion, the NiCo alloy, effectively shielded by the carbon layer derived from the organic ligands during pyrolysis, exhibits enhanced catalytic performance due to the interaction of the bimetallic components.
研究领域:
催化化学
·
材料科学
·
能源化工
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yan Shen,Yingnan Dou,Liping Sun,Lihua Huo,Hui Zhao
The rational design of electrocatalysts is of great significance in the production of ammonia (NH3) through a nitrate reduction reaction (NO3–RR). This article proposes a design approach to regulate electron redistribution and intermediate adsorption energy by adjusting the work function of alloy compounds. As an example, the NiCo alloy is successfully electrodeposited on carbon cloth (CC) using deep eutectic solvent (DES) as medium. The results show that the ammonia production rate of the NiCo alloy is as high as 1.55 mmol h–1 cm–2 at −0.38 V vs RHE, with the Faraday efficiency to be 84.94%, and the selectivity 94%. Experimental characterizations combined with density functional theory calculations confirm that alloying is beneficial for reducing the work function of Ni. This in turn adjusts the d-band center of the alloy to approach the Fermi level, changes the rate-determining step during the reduction reaction process, and consequently improves the performance. Eventually, an investigation is conducted on the Zn–NO3– battery fabricated with Ni1Co2/CC. This further exhibits the potential of Ni1Co2/CC within the energy conversion equipment. This study brings fresh design concepts and opportunities to the development of novel electrocatalysts for NO3–RR.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Weizuo Li,Qiang Li,Zhenhao Xiao,Shu Shang,Dafang He,Xin Wang,Haiqun Chen
The auricularia auricula (termed as AA), which is regarded as a specific natural resource due to its strong swelling characteristic. However, the weak water solubility of bimetallic organic frameworks (bi-MOFs) has not allowed it to be a well guest component to encapsulate into the cell walls of AA. So finding a water-soluble bi-MOFs to encapsulate into AA is the key to prepare the highly dispersed alloy catalyst for heterogeneous catalytic reactions. Therefore, a bi-metallic water-soluble NiCo MOFs (named as NiCo- hmta ) encapsulated into AA (termed NiCo- hmta @AA) composite via chemical interaction was synthesized. Subsequently, a nitrogen-doped carbon confined NiCo alloy catalyst (named as NiCo@CN- hmta -CA) derived from NiCo- hmta @AA composite was prepared. The developed NiCo@CN- hmta -CA exhibited superior performance for tandem catalytic nitroarenes with alcohols in comparison with classic NiCo/CN- hmta -PA (pyrolysis of composite towards AA derived CN supported NiCo- hmta ), NiCo@CN- hmta (direct pyrolysis of NiCo- hmta ) catalysts. Various characterizations (e.g. XRD, SEM, HADDF-STEM) were conducted to explore the origin improvement of NiCo@CN- hmta -CA catalyst for tandem catalytic nitroarenes with alcohols. The strategy, natural resource encapsulated MOFs materials, was employed in this work may open up a new avenue for the design and synthesis of highly dispersed alloy catalysts for other heterogeneous catalytic reactions.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）