CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Bingbing Cui,Chuanpan Guo,Zhihong Zhang,Guodong Fu
Heterojunction engineering is an acceptable strategy in promoting the separation efficiency of electron/hole pairs in the photochromic process. Here, a series of novel solid-state photochromic ZnCo-PBA@WO 2.72 heterojunctions have been designed and prepared in the current study. The cubic ZnCo-PBA were selected as templates to directly grow WO 2.72 amorphous layer using phosphotungstic acid (PW 12 ) as precursors with the assistance of polyvinyl pyrrolidone (PVP). The as-obtained ZnCo-PBA@WO 2.72 heterojunctions have a core–shell structure and the appropriate band energy promote the UV-generated electrons transport from ZnCo-PBA to WO 2.72 . Consequently, the ZnCo-PBA@WO 2.72 heterojunctions exhibit excellent photochromic performance, converting from white to light-grey in 10 s and finally turning into dark-grey in 60 s under UV lamp stimulation. Meanwhile, the WO 2.72 outer layer was more easily in contact with oxygen in air and thus speeds up the oxidation process of W 5+ to W 6+ , allowing the colored ZnCo-PBA@WO 2.72 heterojunctions to return to their original colorless condition within 15 min. The solid-state photochromic ZnCo-PBA@WO 2.72 heterojunctions was then used as repeatable information storage media, data encryption and decryption based on coloration-decoloration behaviors. This study presents a meaningful way to integrate WO 2.72 with MOFs to expand the range of photochromic materials and further to broaden theirs application in optical devices.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Biao Hu,Bing-Hao Wang,Lang Chen,Zhang-Jun Bai,Wei Zhou,Jun-Kang Guo,Sheng Shen,Ting-Liang Xie,Chak-Tong Au,Li-Long Jiang,Shuang-Feng Yin
In the design of photocatalysts for ammonia synthesis, the construction of effective nitrogen (N2) adsorption and activation sites is critical. Herein, Fe single atoms were effectively fixed on the surfaces of WO2.72–x nanowires. Electronic interactions between single Fe atoms and WO2.72–x resulted in a d-band center shift toward the Fermi level and thus enhancement of N2 bonding with the catalyst surface. The studies of differential charge density and electron localization reveal that there is enhanced electron transfer from Fe-SA/WO2.72–x to the adsorbed N2, signifying that Fe single atoms are active centers for N2 activation. Benefiting from electronic interactions, the optimized catalyst shows a NH4+ generation rate of 186.5 μmol g–1 h–1 during photocatalytic N2 reduction.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 412
·期 2
·521-530
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IF 3.286
Li Yuzhen,Yang Lingling,Xu Jing,Zhou Hairihan,Gao Zhida,Song Yanyan
Nanomaterials that exhibit enzyme-like activity (nanozymes) have attracted significant attention due to their potential for applications in analytical tests and in the biological field. In this study, an enzyme-like nanomaterial is developed by coupling Pt nanoparticles with WO 2.72 (Pt/WO 2.72 ). The resultant nanocomposite nanomaterial exhibits peroxidase activity and catalase activity. Moreover, owing to the presence of W 6+ and W 5+ in WO 2.72 , Pt/WO 2.72 nanoplates demonstrate promise as scavengers of hydroxyl radicals. The Pt/WO 2.72 composite nanoplates exhibit excellent peroxidase-like activity for the sensitive colorimetric detection of H 2 O 2 and blood glucose. These Pt/WO 2.72 nanoplates are thought to be a promising tool for broad potential applications in biomedicine, biotechnology, and environmental chemistry.
Pt nanoparticles anchored WO 2.72 nanoplates (Pt/WO 2.72 ) as a multienzyme-like mimetics exhibits peroxidase activity and catalase activity. Furthermore, this composite can be acted scavengers of hydroxyl radicals.
研究领域:
生物医学
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纳米技术
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环境化学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Zhijun Li,Xiaowen Lu,Weiwei Sun,Leipeng Leng,Mingyang Zhang,Honghong Li,Lu Bai,Dundong Yuan,J. Hugh Horton,Qian Xu,Jun Wang
The pathway for efficient catalytic hydrodeoxygenation of biomass represents a powerful, yet challenging route for production of value-added liquid fuels. Herein, we describe a one-step synthetic approach to fabricate WO 2.72 decorated with atomically dispersed palladium atoms that bond covalently to the nearby oxygen atoms. The presence of isolated palladium atoms is confirmed by spherical aberration correction electron microscopy, extended X-ray absorption fine structure measurement, and diffuse reflectance infrared Fourier transform spectroscopy. This catalyst manifests outstanding catalytic performance in hydrodeoxygenation of vanillin to yield 2-methoxy-4-methylphenol (MMP) efficiently and selectively, along with exceptional stability and scalability. Density functional theory (DFT) calculations indicate that this high activity results from the unique electronic structure of isolated palladium atoms confined in defective WO 2.72 . These findings may pave the way for the facile creation of single atom catalysts in a coordination-engineered strategy for the advance of single atom catalysis.
研究领域:
催化
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材料科学
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化学工程
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可持续化学
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产品关联
DOI
高影响因子
ACS Catalysis
·
2023
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IF 12.9
Xu Yu,Han Tian,Zhengqian Fu,Fenglai Pei,Lingxin Peng,Ge Meng,Fantao Kong,Yafeng Chen,Chang Chen,Ziwei Chang,Xiangzhi Cui,Jianlin Shi
The hydrogen spillover effect on metal-supported electrocatalysts is of great significance in hydrogen-involved reactions, especially in a hydrogen oxidation reaction (HOR). Herein, a facile thermal reduction method has been adopted to synthesize W18O49 (WO2.72) nanospheres decorated with single nickel atoms, and the obtained Ni-WO2.72-T (1.20 wt % Ni) was used as a probe catalyst for investigating the hydrogen spillover effect, which exhibits enhanced HOR performance, stability, and resistance to CO poisoning in acidic electrolytes. Based on in situ Raman spectroscopy and the density functional theory (DFT) calculation, a synergistic effect between Ni single-atom active sites and the hydrogen spillover effect is proposed to contribute to the HOR performance on Ni-WO2.72-T. Briefly, the introduction of single Ni atoms induces electron redistribution on Ni-WO2.72-T, making Ni atoms positively charged for H2 adsorption and activation, and on the other hand, the reversible phase transformation between WO2.72 and HxWO2.72 facilitates H* transfer from Ni to WO2.72, i.e., hydrogen spillover, resulting in elevating the HOR catalytic activity. Both experimentation and theoretical calculations demonstrate that the reversible phase transformation of the WO2.72 substrate strengthens the hydrogen spillover effect and thus elevates the HOR catalytic performance, which is believed to be helpful in designing highly active catalysts for hydrogen-involving reactions.
研究领域:
电化学
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催化材料
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理论计算
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产品关联
DOI
高影响因子
Nano Research
·
2021
·Vol. 14
·期 7
·2441-2450
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IF 8.897
Peng Lingxin,Tian Han,Cui Xiangzhi,Su Liang,Meng Ge,Ma Zhonghua,Cao Shaowen,Shi Jianlin
Developing anode catalysts of substantially enhanced activity for hydrogen oxidation reaction (HOR) and anti-CO poisoning performance is of great importance for the application of proton exchange membrane fuel cells (PEMFCs). Herein, we report Pd cluster in situ decorated urchin-like W 18 O 49 (WO 2.72 ) electrocatalysts by a photo-reduction method for high performance HOR. The synthesized Pd-WO 2.72 -L composite of low loading amount of 0.44 wt.% Pd by Xenon light reduction exhibits markedly high HOR catalytic activity and stability in 0.5 M H 2 SO 4 , and the specific HOR current density and mass activity of Pd-WO 2.72 -L are ∼ 1.5 and ∼ 80 times those of 20 wt.% Pt/C catalyst, respectively. Moreover, excellent anti-CO poisoning ability has also been obtained. The excellent HOR activity and anti-CO poisoning performance of Pd-WO 2.72 -L have been discussed mainly in terms of the dual synergetic catalytic effects between Pd and WO 2.72 : Pd activation to Pd δ+ by the electron transfer from Pd to W promotes the hydrogen adsorption and activation to H* species, which results in largely elevated HOR activity; Pd degradation due to the CO poisoning is effectively prevented by WO 2.72 , which is responsible for the excellent CO-tolerance performance.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Green Chemical Engineering
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2025
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IF 7.6
Ruan Tao,Zhao Lisha,Ouyang Xinping,Li Lifeng,Zhang Wenwei,Qiu Xueqing
The depolymerization of lignin into aromatic monomers with high yield is the bottleneck of high valued utilization of lignin. In this work, a highly dispersed Pd supported on WO 2.72 (Pd/WO 2.72 ) catalyst was prepared for efficient hydrogenolysis lignin. The highly dispersed Pd, high specific surface area, high content of acidic sites, and hydrogen spillover of Pd/WO 2.72 improved the depolymerization efficiency of lignin. In addition, the depolymerized products were alkylated with the reaction solvent to prevent monomers from re-polymerizing, thus further enhancing aromatic monomers yield. Under 320 º C, 6 h, Bio-oil and aromatic monomers yield reached 77.67% and 28.80%, respectively. Among the aromatic monomers, the tert -butyl group substituted products accounted for 65.71%, of which 77.1% were methoxy-free phenols. It was found that the bio-oil had a calorific value of 38.13 MJ/kg and an IC 50 value of 43 mg/L, showing their potential applications as fuels or antioxidant additives.
研究领域:
化学工程
·
可再生资源利用
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产品关联
DOI
高影响因子
Energy Technology
·
2023
·Vol. 12
·期 2
·2300656
·
IF 3.8
Xinjie Xie,Zhengru Yang,Liang Zhang,Hao Hua,Shaoyi Bei,Keyan Bao,Chengbin Yu,Zhou Yang,Hengfei Qin
Herein, the organic matter is reported to reduce the overpotential of oxygen evolution reaction (OER) for water splitting. Herein, osmium (Os) is doped into WO 2.72 to form Os–WO 2.72 as an electrocatalyst, which is applied into water splitting to produce hydrogen and assist promote glucose oxidization reaction (GOR). The OER overpotential of 0.05 Os–WO 2.72 is only 248 mV at 10 mA cm −2 in 1 m KOH, which is much superior to commercial RuO 2 . Additionally, the 0.05 Os–WO 2.72 has ultralow GOR overpotential of 158 mV at 10 mA cm −2 and 365 mV at 100 mA cm −2 in 1 m KOH with 0.1 m glucose, and the cell voltage is 1.37 V at 10 mA cm −2 , the values are much lower than its electrocatalytic behaviors in 1 m KOH. The anode produces gluconic acid, which is an important industrial intermediate during hydrogen production at the cathode.
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
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IF 17.2
Xu Yu,Han Tian,Ziyi Yu,Fantao Kong,Min Wang,Ruxiang Shen,Xiangzhi Cui,Jianlin Shi
A dual-site synergistic catalytic mechanism is proposed to optimize the OHad binding energy (OHBE) by constructing ultrafine Ru nanoclusters modified with highly oxygenophilic WO 2.72 clusters in nitrogen-doped carbon carriers, which can optimize the adsorptions of OH ad and active hydrogen species, respectively, resulting in a marked increase in hydrogen oxidation reaction (HOR) activity. The constructed Ru-WO 2.72 -NC shows a HOR mass activity about 8 times that of Pt-C, and the corresponding alkaline exchange membrane fuel cells demonstrate rather higher peak power densities than Ru-NC with 1.193 W cm –2 and more than 1 W cm –2 in H₂ fuel and CO/H 2 mixtures, respectively. The excellent alkaline HOR performance of Ru-WO 2.72 -NC is attributed to the adsorption of OH ad species by WO 2.72 clusters, which synergizes with the adsorption and dissociation of hydrogen on Ru to facilitate the Volmer step. The success in constructing dual-site synergistic catalysis of Ru-WO 2.72 -NC anode provides valuable insight and new guidelines for designing and studying high-activity alkaline HOR catalysts.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Xu Yu,Han Tian,Ziyi Yu,Fantao Kong,Chang Chen,Ziwei Chang,Jian Huang,Xiangzhi Cui,Jianlin Shi
Hydrogen spillover effect-based active catalyst design is an effective strategy to enhance the hydrogen oxidation reaction (HOR) performance, which, unfortunately, still suffers from the high hydrogen spillover energy barrier. Here, a strategy alloying Ir with Ru is proposed to modulate the electronic structure of Ir to accelerate the H* transfer by a novel Ir–Ru–WO2.72 bridge, thus significantly reducing the hydrogen spillover energy barrier from Ir to WO2.72. The IrRu nanoclusters were deposited on a three-dimensional ordered macroporous WO2.72–C framework, and thus the constructed IrRu–WO2.72–C (1.16 wt% Ir and 1.09 wt% Ru) catalyst exhibits excellent HOR and CO-tolerance performance, rather high cell power density, and especially, 4 times higher mass activity than that of Pt/C. The modulation of Ru largely decreases the work function difference between the IrRu clusters and substrate, resulting in a reduced hydrogen spillover barrier via the Ir–Ru–WO2.72 bridge, weakened CO adsorption and fast removal of the adsorbed CO.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
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