Catalysts
·
2020
·Vol. 10
·期 3
·302
·
IF 3.52
Meng Guo,Zhen Wei,Jianming Yang,Zunyuan Xie,Weiqiang Zhang
In the palladium-catalyzed C−C coupling reaction, electron-rich phosphine ligands and a catalytic amount of catalyst loading are required in most cases. Herein, a bench-stable, easily modified and less toxic alkynone was utilized in palladium-catalyzed Sonogashira coupling to replace conventional phosphine ligands. With 1-(4-methoxyphenyl)-3-phenyl-2-yn-1-one (L2) as the ligand, catalyst loading was reduced to 5-10 ppm. In this newly developed catalytic system, a variety of (hetero)arene iodines and alkynes could be tolerated, resulting in good yields of the corresponding cross-coupling products.Keywords:α;β-alkynone;Pd-catalyzed C−C coupling;π-acidicity
研究领域:
有机化学
·
催化化学
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DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 14
·3148
·
IF 5
Shoubei Gao,Kai Liu,Xianbing Ji,Yanshuai Cui,Ruyu Li,Guanglong Ma,Yongqiang Zhang,Longgang Wang
Hydroquinone poses a major threat to human health and is refractory to degradation, so it is important to establish a convenient detection method. In this paper, we present a novel colorimetric method for the detection of hydroquinone based on a peroxidase-like Pd nanozyme. The vancomycin-stabilized palladium nanoparticles (Van-PdnNPs, n = 0.5, 1, 2) were prepared using vancomycin as a biological template. The successful synthesis of Van-PdnNPs (n = 0.5, 1, 2) was demonstrated by UV-vis spectrophotometry, transmission electron microscopy, and X-ray diffraction. The sizes of Pd nanoparticles inside Van-Pd0.5NPs, Van-Pd1NPs, and Van-Pd2NPs were 2.6 ± 0.5 nm, 2.9 ± 0.6 nm, and 4.3 ± 0.5 nm, respectively. Furthermore, Van-Pd2NPs exhibited excellent biocompatibility based on the MTT assay. More importantly, Van-Pd2NPs had good peroxidase-like activity. A reliable hydroquinone detection method was established based on the peroxidase-like activity of Van-Pd2NPs, and the detection limit was as low as 0.323 μM. Therefore, vancomycin improved the peroxidase-like activity and biocompatibility of Van-Pd2NPs. Van-Pd2NPs have good application prospects in the colorimetric detection of hydroquinone.Keywords:nanozyme;vancomycin;palladium;nanoparticles;detection
研究领域:
生物化学
·
环境科学
·
医学
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xuan Tang,Ming Wang,Bingjing Tang,Yunkun Zhao,Wangcheng Zhan,Yanglong Guo,Li Wang,Sheng Dai,Yun Guo
Realizing the potential benefits of nanoscale metal catalysts requires highly dispersed active sites and control of their local environment. Herein, we develop a catalyst synthesis route for manipulating the local environment of highly dispersed metal-active sites via the targeted deposition of Pd near highly dispersed ZrOx on ZSM-5 zeolite using electrostatic interactions. The formed heteroatom Pd-ZrOx in zeolite catalysts is characterized by scanning transmission electron microscopy (STEM), in situ infrared spectroscopy, temperature-programmed desorption (TPD) of O2, and temperature-programmed surface reaction (TPSR) of CH4. The combination of diverse characterization results demonstrates the heteroatom Pd-ZrOx species rendering a higher dispersion and lower oxygen coordination of Pd species, appropriately tuning the strength of Pd–O bonds, and providing abundant active oxygen species to accelerate the dissociation of CH4. Therefore, the catalytic performance of Pd species is effectively enhanced with the lowest temperature of 90% CH4 conversion decreasing from 390 °C (without ZrOx) to 340 °C. Our work provides a strategy of engineering to anchor highly dispersed noble metal species and regulate the local environment to tune catalytic properties.
研究领域:
催化化学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Hanqin Weng,Yi Wang,Fuhai Li,Yusa Muroya,Shinichi Yamashita,Sheng Cheng
Recovery of platinum group metals (PGMs) including palladium (Pd), rhodium (Rh), and ruthenium (Ru) from high-level radioactive liquid waste (HLLW) possesses enormous environmental and economic benefits. A non-contact photoreduction method was herein developed to selectively recover each PGM from HLLW. Soluble Pd(II), Rh(III), and Ru(III) ions were reduced to insoluble zero-valent metals and separated from simulated HLLW containing neodymium (Nd) as a representative for lanthanides , another main component in HLLW. Detailed investigation on the photoreduction of different PGMs revealed that Pd(II) could be reduced under 254- or 300-nm UV exposure using either ethanol or isopropanol as reductants. Only 300-nm UV light enabled the reduction of Rh(III) in the presence of ethanol or isopropanol. Ru(III) was the most difficult to reduce, which was only realized by 300-nm UV illumination in isopropanol solution. The effects of pH was also studied, suggesting that lower pH favored the separation of Rh(III) but hindered the reduction of Pd(II) and Ru(III). A delicate three-step process was accordingly designed to achieve the selective recovery of each PGM from simulated HLLW. Pd(II) was reduced by 254-nm UV light with the help of ethanol in the first step. Then Rh(III) was reduced by 300-UV light in the second step after the pH was adjusted to 0.5 to suppress the Ru(III) reduction. In the third step, Ru(III) was reduced by 300-nm UV light after isopropanol was added and the pH was adjusted to 3.2. The separation ratios of Pd, Rh, and Ru exceeded 99.8%, 99.9%, and 90.0%, respectively. Meanwhile, all Nd(III) still remained in the simulated HLLW. The separation coefficients between Pd/Rh and Rh/Ru exceeded 56,000 and 75,000, respectively. This work may provide an alternative method to recover PGMs from HLLW, which minimize the secondary radioactive wastes compared with other approaches.
研究领域:
环境科学
·
核化学与放射化学
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DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·Vol. 31
·期 15
·e202404172
·
IF 3.7
De-Xin Tan,Yan-li Wang,Xiao-Mei Ning,Xiao-Li Luo,Chun-Ru Chen,Qiao Xiao,Jian-Hong Chen
Graphical PdAg nanoalloys (NAs) are successfully synthesized via a facile visible-light-assisted liquid-phase method. The optimized one-dimensional (1D) PdAg NA, abundant in defects, exhibits exceptional electrochemical properties in both glycerol oxidation reaction (GOR) and ethanol oxidation reaction (EOR). Furthermore, this study introduces controllable strategies for defect generation in catalysts and clarifies the correlation between defect structure and catalytic efficiency. The development of Pd-based bimetallic nanoalloys (NAs) with abundant active sites for achieving highly efficient electrocatalysis in alcohol oxidation deserves continuous attention. Herein, we utilized a facile visible-light-assisted liquid-phase method involving adjusting reaction time to generate active sites, successfully synthesizing one-dimensional (1D) PdAg NAs rich in defects. The optimized 1D PdAg NA exhibits remarkable electrochemical activity, stability, and antipoisonous properties in glycerol oxidation reaction (GOR) and ethanol oxidation reaction (EOR), far exceeding pure Pd and commercial Pd/C catalysts. Notably, compared to glycerol oxidation (1496 mA mg −1 Pd and 4.13 mA cm −2 ), the optimized PdAg NA demonstrated higher mass activity (2990 mA mg −1 Pd ) and specific activity (7.86 mA cm −2 ) in ethanol oxidation. In summary, this work may provide a strategy for designing low-cost electrocatalysts enriched with defects, thereby promoting the development of high-performance alcohol oxidation reactions.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2016
·
IF 4.012
Jing-Jing Lv,Zheng-Jun Wang,Jiu-Ju Feng,Renhua Qiu,Ai-Jun Wang,Xinhua Xu
The construction and design of nanomaterials are important for improving their performance. Here we present a simple one-pot wet-chemical method for the preparation of alloyed Pd-Cu nanowires using octylphenoxypolyethoxyethanol (NP-40) as structure-directing and stabilizing agents. The obtained nanocrystals display outstanding catalytic activity for ligand-free Suzuki cross coupling reaction under mild conditions, and can be easily recovered and reused for at least 5 consecutive cycles without showing significant loss of catalytic activity.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Shan-Shan Li,Jianyan Yu,Yuan-Yuan Hu,Ai-Jun Wang,Jian-Rong Chen,Jiu-Ju Feng
Shape-controlled synthesis of bimetallic catalysts attracts increasing attention, because their catalytic performance is closely correlated with the size, shape and crystal structure. In this report, a rapid and simple route is developed for large-scale synthesis of Pt–Pd hollow nanospheres (Pt–Pd HNSs) supported on reduced graphene oxide nanosheets (RGOs) under mild conditions, while no surfactant , seed, or template is involved. The as-prepared nanocomposites display the improved electrocatalytic activity and better stability for methanol oxidation in alkaline media , compared with commercial Pt black and Pd black catalysts. This work may open a new route for construction of Pt-based bimetallic catalysts in fuel cells.
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
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 12
·4384-4390
·
IF 0
Jing-Jing Lv,Jie-Ning Zheng,Shan-Shan Li,Li-Li Chen,Ai-Jun Wang,Jiu-Ju Feng
In this report, well-dispersed porous Pt–Pd nanodendrites (Pt–Pd NDs) were synthesized at high yield by a simple, one-pot, wet chemical method without using any seed, template, or toxic organic solvent. Poly(vinylpyrrolidone) (PVP) and urea were employed as the co-stabilizing and co-structure-directing agents. It was found that the reaction temperature, the amount of PVP and urea, the Pt/Pd molar ratio, and the pH value of the reaction media greatly affected the size and shape of the Pt–Pd product. The as-prepared Pt–Pd nanocrystals had a larger active surface area, superior catalytic activity, and better stability for the electrooxidation of methanol and ethylene glycol (EG), compared with the commercial Pt-black and Pd-black catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kewang Zhang,Cheng Wang,Huaming You,Bin Zou,Siyu Guo,Shujin Li,Yukou Du
Coupling the unique surface plasmon resonance (SPR) of plasma metals with electrocatalysis is of huge challenge but great significance to advance alcohol oxidation. Herein, we demonstrate the commendable SPR effect of Cu harvesting solar energy to boost the electrocatalytic efficiency of ethylene glycol oxidation reaction (EGOR) over 3D ultrathin lotus-like PdCu nanosheets (NSs). Notably, the well-defined PdCu-2 NSs exhibit the highest mass activity (7547 mA mg −1 ) to EGOR under visible light illumination, which is 1.3 times enhanced versus in dark, as well as outclassing the Pd-homemade NSs and commercial Pd/C catalyst. Meanwhile, the PdCu-2 NSs also show excellent stability in long-term durable tests. Investigations of the correlative mechanism reveal that the enhanced EGOR is mainly attributed to the SPR of Cu promoting the electron transfer from Cu to Pd, modifying the electronic structure of Pd, and facilitating the charge transport in electrochemical reactions, thus strengthening the electrocatalytic ability of Pd. This work sheds light on the SPR of plasma Cu-assisted photoelectrocatalysis to EGOR and provides new avenues to develop novel and high-efficiency photoelectrocatalysts for liquid fuel cells.
研究领域:
材料科学
·
电化学
·
纳米技术
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产品关联
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2022
·Vol. 39
·期 4
·2200013
·
IF 3.467
Xinyi Wei,Jinfeng Zhang,Chang Liu,Xiaopeng Han,Yida Deng,Wenbin Hu
The construction of binary metal Pd-based catalysts is an effective strategy to enhance the activity of methanol oxidation reaction. Herein, atomically dispersed Ir single atoms doped to cuboctahedral Pd nanoparticles (Ir-SAs/Pd) as efficient catalysts for alkaline methanol oxidation are prepared via a simple chemical reduction method. The synthetic Ir-SAs/Pd catalysts exhibit the outstanding mass activity of about 1717.3 mA mg Pd −1 compared with pure Pd and commercial Pd/C in electrooxidation for methanol. Meanwhile, the introduction of Ir single atoms enhances the CO tolerance of Pd nanoparticles to a large extent. On the basis of density functional theory results, the enhanced catalytic performance and CO tolerance rely on the effective improvement of the electron dominance near Fermi level and the negative shift of the d-band center for Pd as a result of the electron redistribution between Pd and Ir atoms. This article will provide new insight into the design of high-performance binary metal catalysts for methanol oxidation in alkaline media.
研究领域:
化学
·
材料科学
·
催化科学
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Qiu Yu,Jiao Dongxu,Huang Hong,Wu Jiandong,Wang Mingming,Gao Tianyi,Zhao Xiao,Ge Xin,Zhang Wei,Zheng Weitao,Singh David J.,Fan Jinchang,Cui Xiaoqiang
Palladium hydride (PdH x ) metallenes are efficient electrocatalysts for the oxygen reduction reaction (ORR) due to their high atomic utilization and optimized oxygen binding energies modulated by interstitial hydrogen. However, their practical application is restricted by the highly unstable nature of interstitial hydrogen at working temperatures around 353 K. Here, we report that the use of Mn effectively locks hydrogen atoms within the Pd metallenes lattice, resulting in high alkaline ORR performance across a temperature range of 303–353 K. In contrast, the ORR activity of PdH x metallenes declines sharply with increasing temperature. At 353 K, the mass activity of PdMnH x metallenes at 0.95 V reaches 1.41 A mg − 1 , which is 14.1 times higher than that of PdH x metallenes. Multiple spectroscopic analyses and theoretical calculations reveal that strong electronic interactions within the immiscible Pd-Mn alloy are critical for locking interstitial hydrogen, thereby enhancing the ORR activity under high temperatures.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Long Cheng,Rong Wang,Ya Wang,Xingxia Yang,Yanxi Deng,Junhua Li
Formic acid (HCOOH) production from direct CO 2 electrolysis is suggested to be one of the most economically viable products. However, its commercial viability remains challenging in highly active and selective electrocatalysts. Here, we report that palladium (Pd) doping has a profound positive impact on the electrocatalytic activity of bismuth oxide (Bi 2 O 3 ). The introduction of Pd increases the current density and Faradaic efficiency of HCOOH (FE HCOOH ) in flow cell system. As a result, the optimized Pd-Bi catalyst exhibits a FE HCOOH of 99.1 % at −0.7 (V vs RHE). Operating experimental studies coupled with theoretical calculations reveal that the Pd modified active sites exhibit near-optimal binding energy for the key *OCHO intermediate, which is more conducive to the generation of formic acid. Furthermore, the use of an asymmetric low-frequency pulsed strategy stabilizes the active sites, ensuring sustained catalytic performance. This study highlights the potential of Pd-doped Bi 2 O 3 as a promising candidate for efficient and selective CO 2 electroreduction to formic acid.
研究领域:
催化化学
·
电化学
·
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
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