HYDROMETALLURGY
·
2025
·
IF 5.3
Feng Feng,Heda Ding,Jiaying Zhang,Lu Yu,Yuxue Yue,Yanxia Sun,Lingling Guo,Xiaoliang Xu,Chunshan Lu,Qunfeng Zhang,Xiaonian Li
The development of industrial technology has significantly promoted the production and accumulation of spent precious metal-based catalysts. This work describes the synthesis of an ionic liquid – [BIim][Cl 3 ] and its application as an alternative to toxic and corrosive reagents for precious metal leaching from waste catalysts. The leaching process using [BIim][Cl 3 ] is proved to be safe and green. It offers a higher stability and higher leaching efficiency compared to other reagents used in previous publications. The ionic liquid [BIim][Cl 3 ] enabled the efficient leaching of Pd and Au, as well as the extremely stable precious metals Pt, Rh under mild conditions. The highest leaching efficiencies achieved by [BIim][Cl 3 ] were 99.9 %, 98.5 %, 98.6 % and 90.6 % for Pd, Au, Pt and Rh under the optimal leaching conditions, respectively. In order to reveal the leaching mechanism, XPS, far infrared (FIR), NMR, and EDS were used to demonstrate the importance of imidazolium cations in the leaching process. The leaching pathway was proposed based on the DFT calculation results on transition state energy barrier.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Jiapeng Sun,Hanxiao Luo,Junyong Wang,Hongliang Li,Raorao Zheng,Dingru Qiao,Jiaji Zhao,Yue Yu,Hua Cao
A simple and practical method has been developed for the carbonylative esterification of imidazo[1,2-a]pyridines via C(sp2)–H bond functionalization using alkyl alcohols under mild reaction conditions. The carbonyl fragment is sourced from radical-mediated C–C cleavage of the alcohols, providing a green, safe, and economic alternative to traditional carbonyl sources like carbon monoxide. Through this strategy, a number of imidazo[1,2-a]pyridine-3-carboxylates were obtained from simple substrates by a single step.
✓ 已验证
DOI
PubMed
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 15
·1703-1708
·
IF 2.073
Jiao Ma,Chengcheng Yang,Shu Zhu,Jinyi Song,Yingzi Fu
In this paper, a simple stereoselective sensing platform for the recognition of ascorbic acid (AA) and isoascorbic acid (IAA) was fabricated via immobilizing HS-β-cyclodextrin (HS-β-CD) on the surface of nanocomposite modified glassy carbon electrodes (GCEs). The nanocomposites were prepared using Pt and Pd bimetal nanowires (Pt–PdNWs) and reduced graphene oxide (rGO). The preparation process was characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). After the modified electrodes interacted with the analytes, obvious differences in the peak currents of AA and IAA were obtained, hinting at the ability of the proposed sensor to recognize AA and IAA. This sensor with simple preparation, a rapid response, and excellent stability and reproducibility provided a promising perspective to recognize and determine AA and IAA.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Hongxia Liu,Meng Wang,Xuqiang Zhang,Jiantai Ma,Gongxuan Lu
The development of an active but cheaper catalyst is critical for efficient photocatalytic hydrogen from renewable source. In this study, we develop a high active catalyst for hydrogen evolution from formaldehyde via alloying of Pd with Ag and sensitization with a dye eosin Y (EY). The XRD, XPS, TEM and HRTEM characterizations indicate that the catalyst exhibits a core-shell structure (Ag core and Ag-Pd shell). Alloying Pd with Ag not only provides more efficient catalytic sites than single component Pd catalyst, but greatly promotes the efficient electron transfer and prolongs the lifetime of photogenerated electrons, enhances the charge separation efficiency and the photocatalytic hydrogen evolution activity significantly. The catalyst activity for hydrogen is highly dependent on the adsorption energies of HCHO and H 2 O molecules on metal surface of the alloy catalyst. Our results disclose a new route to high efficient catalyst development for solar hydrogen generation from formaldehyde.
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2023
·
IF 8.9
Xuan-Yu Yang,Zheng-Guang Zhao,Li-Juan Yue,Ke-Feng Xie,Gui-Xin Jin,Shao-Ming Fang,Yong-Hui Zhang
Pd-based materials have received remarkable attention and exhibit excellent H2 sensing performance due to their superior hydrogen storage and catalysis behavior. However, the synergistic effects originated from the decoration of Pd on a metal oxide support to boost the sensing performance are ambiguous, and the deep investigation of metal support interaction (MSI) on the H2 sensing mechanism is still unclear. Here, the model material of Pd nanoparticle-decorated WO3 nanosheet is synthesized, and individual fine structures can be achieved by treating it at different temperatures. Notably, the Pd-WO3-300 materials display superior H2 sensing performance at a low working temperature (110 °C), with a superior sensing response (Ra/Rg = 40.63 to 10 ppm), high sensing selectivity, and anti-interference ability. DFT calculations and detailed structural investigations confirm that the moderate MSI facilitates the generation of high mobility surface O2– (ad) species and a proper ratio of surface Pd0–Pd2+ species, which can significantly boost the desorption of intermediate PdHx species at low temperatures and contribute to enhanced sensing performance. Our work illustrates the effect of MSI on sensing performance and provides insight into the design of advanced sensing materials.
✓ 已验证
DOI
PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Wang Guojing,Jing Shengchang,Tan Yiwei
Shape control of noble metal (NM) nanocrystals (NCs) is of great importance for improving their electrocatalytic performance. In this report, branched Pd@Rh core@shell NCs that have right square prism-like arms with preferential exposure of Rh {100} facets (denoted as b-Pd@Rh-NCs thereafter) are synthesized and utilized as an electrocatalyst for the hydrazine electrooxidation (HEO) in acidic and alkaline electrolytes. The b-Pd@Rh-NCs are obtained by the heteroepitaxial growth of Rh on the pre-formed branched Pd NCs (denoted as b-Pd-NCs thereafter) core in the presence of poly(vinyl pyrrolidone) (PVP) and bromide ions. A comparative analysis of the voltammetric data for the HEO shows a higher activity on the b-Pd@Rh-NCs exposed with Rh {100} faces than on Rh black, the b-Pd-NCs, and Pd black in acid and alkaline solutions, indicating a structure sensitivity of the reaction. Analysis of the products from the b-Pd@Rh-NCs catalysed HEO reveals a very high hydrazine fuel efficiency, as determined by on-line differential electrochemical mass spectrometry (DEMS).
✓ 已验证
DOI
PubMed
高影响因子
Nano Research
·
2015
·Vol. 8
·期 6
·2115-2123
·
IF 7.01
Long Ran,Wu Di,Li Yaping,Bai Yu,Wang Chengming,Song Li,Xiong Yujie
Heterogeneous catalysis occurs through a process of interfacial reactions; therefore, both surface facet and size control can increase catalytic efficiency. Octahedral Pd nanocrystals, enclosed by {111} facets, should be the ideal geometrical shape for Heck coupling reactions; however, it is challenging to synthesize 5 nm Pd octahedrons with a relatively uniform size distribution using existing capping-agent techniques. Here, we used palladium as a model system to investigate how the kinetics of atomic addition could be precisely controlled using a syringe pump. As a result, our method produced Pd octahedrons as small as 5 nm, which increased the catalytic efficiency of Heck coupling reactions while reducing the weight of catalyst used.
✓ 已验证
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2017
·Vol. 9
·期 6
·928-933
·
IF 1.889
Li Na,Feng Yahui,Du Jingjing,Li Changyun,Xie Shaowen,Xu Jianxiong
Hierarchically nanoporous Pd–HSiO1.5 particles were prepared by dissolving template method. The particles were analyzed by transmission electron microscope (TEM), nitrogen adsorption stripping curves, Barrett-Joyner-Halenda (BJH) pore size distribution curves and Fourier
Transform Infrared (FTIR). Hierarchically nanoporous Pd–HSiO1.5/Ni–Co composite electrodes were fabricated by the method of composite eletrodeposition using hierarchically nanoporous Pd–HSiO1.5 particles as composite nanoparticles. The electrocatalytic
activities for hydrogen evolution of the Ni–Co alloy electrodes and hierarchically nanoporous Pd–HSiO1.5/Ni–Co composite electrodes were studied. Results showed that the specific surface area and pore volume of nano-hierarchical porous silicon hydrogen compound
particles were 896 m2/g and 1.30 cm3/g respectively, the size of the hollow spheres was about 70 nm, and the thickness of the spherical shell was about 10 nm. In addition, the precious metal Pd was successfully loaded on the inside and surface of the hierarchically nanoporous
silicon hydrogen compound. The size of the inside Pd nanoparticles was about 3 nm, and the size of superficial Pd nanoparticles was 10–30 nm. The electrocatalytic hydrogen evolution performance of hierarchically nanoporous Pd–HSiO1.5/Ni–Co composite electrodes
was superior than that of Ni–Co alloy electrode, and the electrocatalytic activities of Pd–HSiO1.5/Ni–Co composite electrodes for hydrogen evolution reached the optimal value when the concentration of hierarchically nanoporous Pd–HSiO1.5 particles
was 1.8 g/L.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zaiyong Yang,Zhiheng Hao,Shunxin Zhou,Peng Xie,Zengxi Wei,Shuangliang Zhao,Fuzhong Gong
Direct synthesis of hydrogen peroxide (DSHP) from H2 and O2 offers a promising alternative to the present commercial anthraquinone method, but it still faces the challenges of low H2O2 productivity, low stability of catalysts, and high risk of explosion. Herein, by loading in a microchannel reactor, the as-synthesized Pd–Sn alloy materials exhibit high catalytic activity for H2O2 production, presenting a H2O2 productivity of 3124 g kgPd–1 h–1. The doped Sn atoms on the surface of Pd not only facilitate the release of H2O2 but also effectively slow down the deactivation of catalysts. Theoretical calculations demonstrate that the Pd–Sn alloy surface has the property of antihydrogen poisoning, showing higher activity and stability than pure Pd catalysts. The deactivation mechanism of the catalyst was elucidated, and the online reactivation method was developed. In addition, we show that the long-life Pd–Sn alloy catalyst can be achieved by supplying an intermittent flow of hydrogen gas. This work provides guidance on how to prepare high performance and stable Pd–Sn alloy catalysts for the continuous and direct synthesis of H2O2.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Fukun Bi,Xiaodong Zhang,Jinfeng Chen,Yang Yang,Yuxin Wang
The highly dispersed Pd nanoparticles supported UiO-66 catalysts were successfully prepared via ethylene glycol reduction method (Pd-U-EG). And their catalytic performances were evaluated by toluene degradation. A series of characterization methods were carried out to characterize the physicochemical properties of the samples. During the effect of high weight hourly space velocity, stability and reusability test, the catalytic activity of Pd-U-EG remains unchanged, which also indicated good catalytic performance. More importantly, water resistance test (10-20 vol.% water) indicated that Pd-U-EG had a great water resistance. The study of toluene-TPD, toluene-TPSR and in-situ DRIFTS at different temperatures under different conditions over Pd-U-EG indicated the role of H 2 O. The introduction of H 2 O at low temperature was conducive to the adsorption of toluene, but inhibited the degradation of toluene. Differently, the H 2 O presence at high temperature was favorable to toluene degradation. In addition, toluene degradation mechanism was also revealed.
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2014
·Vol. 6
·期 12
·3328-3332
·
IF 5.044
Xuan Xu,Haoran Li,Yong Wang
Graphical Being picky: N-Doped carbon (CN- x ) derived from N-containing ionic-liquid precursors are used as Pd nanoparticle supports for the selective hydrogenation of phenol to cyclohexanone with high activity and selectivity under mild reaction conditions. The activities of the Pd@CN- x catalysts derived from a variety of ionic liquids are different, and studies on the physical properties, Pd status, and N species of the catalysts are performed. In this report, a kind of mesoporous N-doped carbon (CN- x ) derived from N-containing ionic-liquid (IL) precursors were synthesized, and Pd@CN- x prepared by a simple ultrasound-assisted method showed higher catalytic activity for the selective hydrogenation of phenol and its derivatives under mild reaction conditions in water than commercial Pd@C and other common Pd heterogeneous catalysts. The catalytic activities of Pd@CN- x derived from different ILs were different, and further study into the influencing factors, including physical properties, N species of CN- x , and Pd status of Pd@CN- x , were performed.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Qing Qu,Guo-Liang Pan,Yan-Ting Lin,Chang-Wei Xu
High efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) are essential components of renewable energy technologies . However, the high onset potential and limited active sites restrict the catalytic activity of current electrocatalysts. Therefore, we are motivated by the development of cheap and efficient catalytic electrodes to promote the sluggish water-splitting systems associated with the large-scale application of clean and renewable energy technologies. Herein, a novel, simple, and efficient routine is presented by noble metal particles embedded within mesoporous metal oxide materials as high-efficiency anode catalysts for OER. Highly ordered mesoporous Co 3 O 4 was prepared by a nanocasting method using the silica KIT-6 as hard template, showing an enhanced electrochemical performance. Then, M - Co 3 O 4 (M = Pt, Pd, Au) nanomaterials were prepared by a simple but novel chemical reduction method. They show the high surface area of 112.3, 81.0 and 73.6 m 2 g −1 , which can provide more active surface area exposure leads to shorter paths of charges from electrolyte to electrode surface . Moreover, a three-dimensional highly ordered mesoporous structure can facilitate diffusion and penetration of electrolyte and oxygen, and can also keep catalyst nanoparticles in a well-dispersed condition with more active sites. Electrochemical measurements revealed that 20, 50, 25 wt% are the best weight contents for M (M = Pt, Pd, Au) in the Co 3 O 4 with highest electrochemical activity (0.410, 0.415 and 0.422 V vs. SCE) and j 0.7V reaching a maximum value. M-Co 3 O 4 (M = Pt, Pd, Au) materials exhibit superior activities and excellent long-duration stability in alkaline attributed to accelerating the formation of Co(IV) cations after being introduced M(M = Pt, Pd, Au) nanoparticles within mesoporous Co 3 O 4 . This kind of noble metal embedded within mesoporous oxide catalysts will hold a large potential as a highly promising electrocatalyst in the future.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）