Engineering
·
2021
·
IF 7.553
Xinyu Cao,Tiancheng Pu,Bar Mosevitzky Lis,Israel E. Wachs,Chong Peng,Minghui Zhu,Yongkang Hu
Reductive pretreatment is an important step for activating supported metal catalysts but has received little attention. In this study, reconstruction of the supported nickel catalyst was found to be sensitive to pretreatment conditions. In contrast to the traditional activation procedure in hydrogen, activating the catalyst in syngas created supported Ni nanoparticles with a polycrystalline structure containing an abundance of grain boundaries. The unique post-activation catalyst structure offered enhanced CO adsorption and an improved CO methanation rate. The current strategy to tune the catalyst structure via manipulating the activation conditions can potentially guide the rational design of other supported metal catalysts.
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DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Yanwei Cao,Yao Peng,Danyang Cheng,Lin Chen,Maolin Wang,Cheng Shang,Lirong Zheng,Ding Ma,Zhi-Pan Liu,Lin He
The conversion of carbon monoxide (CO) into high-value organic molecules has long been pursued by both industry and academia. One of the central challenges is to realize carbon–carbon coupling with high selectivity for CO insertion. We report here a highly selective Au/ZnO composite catalyst for one-step oxidative coupling of CO with secondary amines, producing oxamides. The reaction is >99% selective under ambient conditions, which exhibits a subtle change of catalyst activity over ∼120 h in a fixed-bed reactor. A combination of microscopic and spectroscopic studies (including X-ray photoemission spectroscopy, X-ray absorption spectroscopy, CO-Fourier transform infrared spectroscopy, and aberration-corrected high-angle annular dark-field scanning transmission electron microscopy) and machine learning reveal that the active site is the Au–ZnO interface with a Au nanocluster attached to the ZnO support via nonstoichiometric ZnOx (x > 1) linkages. The reaction mechanism and key reaction intermediates were confirmed by density functional theory calculations and in situ diffused reflectance infrared Fourier transform spectroscopy signals. Our results open an avenue in heterogeneous catalysis to achieve the ambient-condition CO transformation by exploiting the interfacial synergistic effects.
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Nanoscale Advances
·
2020
·Vol. 2
·期 3
·1084-1089
·
IF 0
Shuli Yin,Ziqiang Wang,Chunjie Li,Hongjie Yu,Kai Deng,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Rational design of Pt-based nanostructures with a controllable morphology and composition is vital for electrocatalysis. Herein, we demonstrate a dual-template strategy to fabricate well-defined cage-bell nanostructures including a Pt core and a mesoporous PtM (M = Co, Ni) bimetallic shell (Pt@mPtM (M = Co, Ni) CBs). Owing to their unique nanostructure and bimetallic properties, Pt@mPtM (M = Co, Ni) CBs show higher catalytic activity, better durability and stronger CO tolerance for the methanol oxidation reaction than commercial Pt/C. This work provides a general method for convenient preparation of cage-bell nanostructures with a mesoporous bimetallic shell, which have high promising potential for application in electrocatalytic fields.
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PubMed
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 38
·6560-6570
·
IF 0
Haiqin Song,Haihua Xiao,Minhua Zheng,Ruogu Qi,Lesan Yan,Xiabin Jing
Anticancer drugs of gemcitabine and oxaliplatin combined in a clinic regimen (GEMOX regimen) were co-loaded to a biodegradable polymer platform for drug delivery.
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PubMed
Nature Communications
·
2026
·
IF 18.1
Gong Shanhe,Xia Qing,Zhai Yanjie,Li Weisong,Wu Jie,Zhou Yingying,Liao Yucong,Zhu Kuang,Yang Yuchen,Yang Yile,She Xiaojie,Wang Zhaolong,Xu Hui,Zhang Xiao,Lau Shu Ping
Direct electrochemical conversion of captured carbon species offers a route to avoid the energy-intensive steps of thermal CO 2 release, compression and transport in conventional carbon capture and utilization. In proton exchange membrane (PEM) reactors, however, the acidic cathode environment promotes hydrogen evolution and limits CO 2 regeneration from (bi)carbonate capture media, resulting in low carbon utilization and high energy demand. Here we show a modular PEM–porous solid electrolyte (PSE) reactor for direct conversion of (bi)carbonate to CO. Using a transparent cell with in situ visualization, we reveal that the PSE regulates proton transport, reduces local proton reduction, limits bubble accumulation and facilitates CO 2 transport to the cathode. The PEM–PSE reactor achieves a CO Faradaic efficiency of 90% at 200 mA cm −2 , a carbon efficiency of 84%, and an energy consumption of ~26.0 GJ t −1 CO. It operates at current densities up to 800 mA cm −2 , reaching a CO rate of ~8.0 mmol h −1 cm −2 . These results highlight the regulation of proton and gas transport in the electrochemical conversion of captured carbon.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bo He,Siyuan Jiang,Ce Wang,Zhihao Man,Yilong Hou,Jiangwei Shang,Xiuwen Cheng
Activation of peroxymonosulfate (PMS) to degrade refractory antibiotics is an essential branch of advanced oxidation processes (AOPs). We reported in this study that the (1 1 1) and (0 0 2) crystal planes of CuO with the (3 1 1) crystal plane of Cu 0.72 Co 2.28 O 4 formed surface heterojunctions, which are used as interfaces for PMS adsorption to explore the performance of different heterojunctions. The formation of Cu 0.72 Co 2.28 O 4 /CuO heterojunction makes up for the CuO (0 0 2) surface’s shortcomings and improves the adsorption and activation of PMS by the CuO (0 0 2) surface. The heterojunction significantly grows the length of the PMS’ O-O bond compared to the single-crystal surface, which leads to lower energy required for PMS’ O-O bond breaking and further verified the increased covalent character. Based on the quality influencing factors values, the influence of four factors on sulfamethoxazole (SMX) deterioration fits as follows: HCO 3 – has the largest relative relevance among the factors, followed by H 2 PO 4 - , NO 3 – , and Cl - . The Box-Behnken methodology fitted the optimum efficiency with the initial concentration of Cl - , NO 3 – , H 2 PO 4 - , and HCO 3 – were 8.0, 10.0, 12.5, and 7.5 mM, respectively. The SMX’s atoms (N, and O) have higher electrophilic attack sites, indicating these atoms are electrophilic attack sites.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Zhiman Yang,Xiaoshuang Shi,Meng Dai,Lin Wang,Xiaohui Xu,Rongbo Guo
Potential of effluents from biological hydrogen production process to improve ciprofloxacin (CIP) removal was investigated using ciprofloxacin-degrading enrichments in the presence of Fe 3 O 4 nanoparticles . Effluent addition clearly promoted CIP removal, which was 61%, 38% and 16% higher than those in the enrichments amended with fecal sewage , biogas digestate and water, respectively. Experiments of sterilization and organic components of effluents indicated that the organic substances served as co-metabolic substrate to facilitate CIP removal, where ethanol was the preferred co-metabolic substrate. Although the effluent addition changed the bacterial community composition which corresponded to the changes in the relative abundances of dominant genera in the enrichments, CIP removal performance remained unchanged. The increased Fe (II) concentrations indicated that there might be a positive relationship of CIP removal with the microbial reduction of Fe (III) to Fe (II) in Fe 3 O 4 in the effluents-amended enrichments. It was proposed that the organic substances in the effluents might serve as the co-metabolic substrate to promote CIP removal by CIP-degrading and Fe (III)-reducing bacteria.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yao Yang,Yanli Shi,Junjing Duan,Kailei Lu,Gang Cheng,Yiding Zhao,Zhangyi Huang,Peitong Li,Nian Wei,Xinghua Zhu,Jianqi Qi,Tiecheng Lu
The exploration of new red phosphors is important for the development of white light-emitting diodes (w-LEDs), as existing red phosphors exhibit low efficiency and low performance. This work aims to enhance the photoluminescence characteristics of a red-emitting Gd 2 Zr 2 O 7 :Eu 3+ phosphor by co-doping with Al 3+ . Eu 3+ single-doped and Eu 3+ and Al 3+ co-doped Gd 2 Zr 2 O 7 nanophosphors that could be efficiently pumped by commercial near-UV LED chips were prepared by a modified liquid–solid–solution phase-transfer method. X-ray diffraction data revealed that the synthesized phosphors were well crystallized with single-phase fluorite structure. Scanning electron microscopy images showed that the particle size ranges from 15 to 25 nm. In addition, the optical performance of the samples was characterized by fluorescence spectroscopy and lifetime spectroscopy. The effect of Al 3+ on the luminescence performance of the Eu 3+ -doped Gd 2 Zr 2 O 7 phosphor was studied in detail. The emission intensity of the Gd 1.93 Zr 1 · 97 O 7 :Eu 3+ 0.07 Al 3+ 0.03 phosphor was found to be 620% stronger than that of the single-doped Eu 3+ phosphor. These results unambiguously show that the Gd 1.93 Zr 2- x O 7 :Eu 3+ 0.07 Al 3+ x phosphors are promising candidates for application in w-LEDs.
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高影响因子
ACTA PHARMACOLOGICA SINICA
·
2021
·Vol. 43
·期 6
·1453-1460
·
IF 6.15
Wang Yu-zhe,Yang De-hua,Wang Ming-wei
Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are regarded as ‘incretins’ working closely to regulate glucose homeostasis. Unimolecular dual and triple agonists of GLP-1R and GIPR have shown remarkable clinical benefits in treating type 2 diabetes. However, their pharmacological characterization is usually carried out in a single receptor-expressing system. In the present study we constructed a co-expression system of both GLP-1R and GIPR to study the signaling profiles elicited by mono, dual and triple agonists. We show that when the two receptors were co-expressed in HEK 293T cells with comparable receptor ratio to pancreatic cancer cells, GIP predominately induced cAMP accumulation while GLP-1 was biased towards β-arrestin 2 recruitment. The presence of GIPR negatively impacted GLP-1R-mediated cAMP and β-arrestin 2 responses. While sharing some common modulating features, dual agonists (peptide 19 and LY3298176) and a triple agonist displayed differentiated signaling profiles as well as negative impact on the heteromerization that may help interpret their superior clinical efficacies.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2020
·
IF 4.389
Yue Yu,Yimin Sun,Xiong Zhou,Yurong Mao,Yunxiu Liu,Ling Ye,Li Kuang,Jing Yang,Yi Deng
Polyetheretherketone (PEEK) has been well concerned as a promising material for hard tissue repair because of its outstanding mechanical behavior and superior biocompatibility. However, its clinical application is limited by its biological inertness and the susceptibility to bacterial infection during implantation. To improve the original shortcomings, self-polymerized dopamine (PDA) was used to enrich silver ions on the PEEK surface. Moreover, a layer of carboxymethyl chitosan (CMC) film was formed on the PEEK surface by the spin-coating method, aiming to control the release of silver ions on the surface. At the same time, bone forming peptide (BFP) was modified onto the PEEK surface by 1-(3-dimethylaminopropyl)-3-ethylcarbonimide hydrochloride (EDC) / N-hydroxy succinimide (NHS). The characterization results showed that PEEK-Ag-CMC-BFP could be obtained successfully. The inhibition zone and bacterial kinetic curve showed a favorable inhibitory effect of the sliver-modified PEEK on gram-negative and gram-positive bacteria. In vitro experiments exhibited that PEEK-Ag-CMC-BFP had a better biological activity than that of PEEK, which could promote cell proliferation and osteogenic differentiation. It is expected that this dual-function material with antibacterial and bone-promoting properties has a vast potential applied in the field of hard tissue repair.
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PubMed
高影响因子
Catalysts
·
2025
·Vol. 15
·期 12
·1156
·
IF 4
Quan Zhou,Lewa Zhang,Ziluo Wang,Qiutong Wang,Chenyuan Zhu
Electrochemical nitrate reduction to ammonia offers a sustainable route for nitrogen fixation, yet achieving high efficiency and selectivity remains challenging. Here, a Sustainion-enabled Cu/Co tandem catalyst is developed to couple compositional synergy with ionomer-mediated interfacial regulation. The optimized Cu60Co40/Sus/C electrode delivers a Faradaic efficiency of 91.3% and an NH3yield rate of 2.63 mmol gcat.−1h−1at −0.3 V vs. RHE, surpassing Cu-Co/Nafion/C and Cu-Co/C counterparts. Structural analyses confirm that Sustainion prevents nanoparticle aggregation and maintains robust Cu/Co interfaces. Electrochemical and in situ spectroscopic studies reveal that the cationic quaternary ammonium groups of Sustainion electrostatically enrich NO3−/NO2−intermediates, facilitating their adsorption and hydrogenation toward NH3formation. The combined structural stabilization and intermediate modulation enable efficient tandem catalysis between Cu-driven nitrate activation and Co-mediated hydrogenation. This work provides molecular-level insight into ionomer–catalyst interactions and highlights interfacial engineering as a powerful strategy for sustainable ammonia synthesis.
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产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2025
·
IF 4.6
Caidi Zhang,Guangyu Li,Chengqian Duan
A dodecahedral single-atom cobalt catalysts with nitrogen-doped carbon matrices (Co-N-C) is synthesized by calcining MOFs precursors (ZIF-67), which is constructed as non-enzymatic sensor for the sensitive detection of nitrite (NO 2 − ). The characterization of the Co-N-C catalysts has been performed by X-ray powder diffraction (XRD), transmission electron microscopic (TEM) and scanning electron microscopy (SEM). The outcome shows that Co-N-C is a dodecahedron with a rough surface and a diameter of about 200–280 nm. The electrochemical measurements demonstrate that the Co-N-C/GCE sensor displays a favourable voltammetric response towards the oxidation of NO 2 − with a wide linear range from 0.1278 mM to 42.7778 mM. It also displays a low detection limit of 0.0426 mM (S/N = 3) and high sensitivity of 715.32 μA mM −1 cm −2 and 305.37 μA mM −1 cm −2 . Moreover, determinations of NO 2 − in tap water and pickle juice samples are performed respectively by the standard addition method. The results of three parallel measurements are acceptable with the relative standard deviation of 0.36–1.30 % and the recovery of 95.60–101.80 %. Therefore, Co-N-C/GCE is expected to be a new platform for NO 2 − detection.
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高影响因子
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