RSC Advances
·
2025
·Vol. 15
·期 47
·40056-40066
·
IF 4.6
Huimin Jia,Ya Wang,Yiting Yang,Chuang Liu,Weiwei He
Constructing a multi-interface synergistic catalytic system represents an effective strategy for developing highly efficient photocatalysts; however, the challenge lies in fabricating ideal heterojunctions that can fully harness the multiple synergistic effects of the components. In this study, a series of TiO2/Pd/Ti3C2 nanocomposite photocatalysts with 2D/0D/2D heterojunctions were successfully fabricated through a combination of photoreduction and electrostatic self-assembly techniques by varying the mass ratios. Under irradiation from a 300 W xenon lamp, the as-constructed TiO2/3% Pd/1% Ti3C2 heterojunction photocatalyst exhibited a significantly enhanced H2 evolution rate of 21.60 mmol h−1 g−1, which was approximately 135-fold and 25.4-fold higher than those of pristine TiO2 nanosheets (NSs) and TiO2/1% Ti3C2, respectively. Electrochemical impedance spectroscopy, photoluminescence spectroscopy, and electron spin resonance analysis collectively revealed that the enhanced photocatalytic performance can be attributed to the formation of a synergistic catalytic interface among the TiO2 NSs, highly active Pd NPs, and monolayer Ti3C2 nanosheets. This interface facilitated efficient charge separation, shortened the charge transfer pathways, and enhanced the generation of reactive oxygen species. This study presents a promising strategy for improving catalytic performance through multi-interface synergy and offers a preliminary investigation into the underlying synergistic mechanisms using multiple characterization techniques.
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PubMed
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
hanchi Ma,Hao Wang,Xiya Yan,Bin Liu,Jianhui Yang
Au@Pd@Pt core-shell nanoparticles (CSNs) with mesoporous structures and nanocavities were synthesized through a seed-mediated growth method. The process involved the initial formation of Au@Pd CSNs via the reduction of PdCl₄²⁻ by ascorbic acid (VC), followed by a reduction of PtCl62- by VC and a galvanic replacement reaction between the Pd shell and PtCl₆²⁻. The galvanic replacement reaction is a critical step in the formation of Au@Pd@Pt CSNs featuring distinctive void in the mesoporous structures. The electrocatalytic performance of the as-synthesized Au@Pd@Pt CSNs for the ethanol oxidation reaction (EOR) was systematically evaluated. Due to the unique hierarchical structure featuring both mesoporosity and internal nanocavities, the Au@Pd@Pt CSNs exhibited significantly enhanced electrocatalytic activity compared to Au@Pd CSNs, Au@Pt CSNs, and commercial Pd/C catalysts. This work presents a facile strategy for constructing hierarchical core-shell nanostructures, demonstrating considerable potential for application in electrocatalytic ethanol oxidation.
研究领域:
纳米材料
·
电催化
·
能量转换
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燃料电池
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纳米技术
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DOI
高影响因子
Chemistry-An Asian Journal
·
2021
·Vol. 16
·期 15
·2113-2117
·
IF 4.568
Da Yang,Guang-Zhao Zhou,Long-Li Zhang,Huan Liu
Graphical The hydroamidocarbonylation of alkynes with amides was accomplished over a bifunctional ligand based Pd catalyst. The hydroamidocarbonylation of alkynes with amides allows for the synthesis of α,β-unsaturated imides with the advantage of 100% atomic economy. Herein, the bifunctional ligand ( L1 ) containing a sulfonic acid group (-SO 3 H) and phosphino-fragment enable the Pd catalyst to accomplish the hydroamidocarbonylation of alkynes with amides. It was found that, due to an intramolecular synergetic effect, the L1 -based Pd-catalyst exhibited much higher activity than the individual mechanical mixtures of Xantphos-based Pd-complex and MeSO 3 H. The formation and stability of Pd-H species were promoted by the presence of L1 , which was verified by in situ high-pressure FT-IR analysis. Under the optimized conditions, the target products of the branched imides were obtained with yields in the range of 46–87% over the L1 -based Pd-catalyst. Advantageously, as an ionic ligand, the L1 -based Pd-catalyst could be recycled for 4 runs in the ionic liquid of [Bmim]NTf 2 without any obvious activity loss and detectable metal leaching.
研究领域:
有机化学
·
催化化学
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PubMed
高影响因子
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
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2022
·Vol. 2022
·期 33
·e202200316
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IF 3.261
Yong Wang,Hui Wang,Qifan Yang,Shihua Xie,Hongjun Zhu
Graphical Herein, palladium(II)-catalyzed halogenation of 2-phenylquinazolines using N -halosuccinimides as halogen sources was described via C−H activation under mild reaction conditions. A series of halogen-substituted 2-arylquinazolines were synthesized through C−H functionalization. An efficient quinazoline-assisted ortho -halogenation of 2-arylquinazolines has been developed using N -halosuccinimides as halogen sources with Pd(II)-catalyzed C−H bond activation. No additional ligand and oxidant are required. This protocol is highly regioselective and applicable to a broad range of quinazoline substrates bearing different functional groups, giving yields of up to 98 %. The mechanism of the quinazoline ortho -halogenation was investigated by comprehensive experimentation.
研究领域:
有机化学
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合成化学
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 3
·3014-3020
·
IF 1.338
Liu Xing-Quan,Chen Xue-Song,Wu Jian,Yao Lei
Three-dimensional (3D) Pd–Pt alloy with coral-like nanostructures were synthesized via bubble dynamic templated electrodeposition method at room temperature. The morphology of the asprepared nanostructures was characterized using scanning electron microscopy (SEM), EDS, high-resolution
transmission electron microscopy (HRTEM), respectively. Cyclic voltammetry method was adopted to evaluate the electrocatalytic activities of the synthesized electrodes toward oxygen reduction in KCl solution. The electrochemical results indicated that the Pd–Pt alloy with coral-like
nanostructures hold the high performance for oxygen reduction.
研究领域:
材料科学
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电化学
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纳米技术
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PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2017
·Vol. 12
·期 1
·24-31
·
IF 1.712
Han Dongxu,Zhang Zhiguo,Bao Zongbi,Xing Huabin,Ren Qilong
We have successfully prepared a series of Pd-Ni/TiO 2 catalysts by a one-step impregnation-reduction method. Among these catalysts with different compositions of Ni and Pd, the one with the Ni:Pd ratio of 2.95 showed the best activity. Small monodispersed Pd-Ni bimetallic nanoparticles were loaded on the surface of titanium oxide nanopowder as confirmed with TEM and EDS mapping. The XPS analysis demonstrated that Pd exists as 31% Pd(II) species and 69% Pd(0) species and all nickel is Ni(II). The prepared Pd-Ni/TiO 2 exhibited enhanced catalytic activity compared to an equal amount of Pd/TiO 2 for Suzuki-Miyaura reactions together with excellent applicability and reusability.
研究领域:
化学
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材料科学
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催化反应
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DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Qiulin Ye,Dongdong Wang,Jiabao Lv,Minghui Tang,Angjian Wu,Yaqi Peng,Shengyong Lu
The electrocatalytic CO2 conversion offers a sustainable pathway for generating ecofriendly chemicals and fuels while simultaneously enabling the storage of intermittent renewable energy. Herein, CuPd bimetallic catalysts were specifically designed through displacement reaction, with a magnetron sputtering Cu film as a substrate. The optimized CuPd catalyst achieved an ethylene Faradaic efficiency (FE) of 51.07% and a C2+ FE of 82.18% at a 200 mA/cm2 current density. In situ Raman spectroscopy indicates that the CuPd electrode exhibited a high local surface pH during the CO2 reduction reaction, which was favorable for C–C coupling. The observation of the *OCCOH intermediate by in situ FTIR, combined with density functional theory calculations, confirms that the CuPd surface promotes C–C coupling instead of direct hydrogenation. This mechanistic insight explains why the addition of Pd enhances the selectivity for C2+ products.
研究领域:
电催化
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材料科学
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可持续能源
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表面化学
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二氧化碳利用
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产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 16
·期 1
·
IF 4.3
Yu Zhang,Ying Xin,Lizheng Tang,Shihao Cui,Hongling Duan,Qingshan Zhao
The selective hydrogenation of phenol to cyclohexanone is a pivotal reaction for producing nylon precursors. Conventional Pd/C catalysts, however, suffer from weak metal–support interactions, leading to size heterogeneity and agglomeration of Pd nanoparticles, which degrades their activity and stability. Herein, we report a facile argon plasma treatment to engineer rich defects on an activated carbon (AC) support, resulting in a highly dispersed and stable catalyst (denoted as PL-Pd@ACAr). Characterization results indicate that the abundant carbon defects in PL-Pd@ACArenhance the anchoring of Pd precursors, ensure the uniform dispersion of Pd nanoparticles, and effectively modulate their electronic structure. Consequently, the plasma-enabled PL-Pd@ACArcatalyst achieves 99.9% phenol conversion with 97% selectivity to cyclohexanone at a mild temperature of 70 °C and maintains exceptional stability over six consecutive cycles. This work provides a robust and efficient strategy for the surface engineering of carbon supports to design high-performance hydrogenation catalysts.
研究领域:
催化化学
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材料科学
·
化学工程
·
绿色化学
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DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ling Shi,Zefeng Wang,Xianlan Chen,Guangming Yang,Wei Liu
The synthesis of noble metal nanoparticle with controlled shapes is an attractive goal in developing highly active catalysts. However, constructing high-quality noble metallic nanocatalysts with good electrocatalytic activity remains a huge challenge to date. In this research work, the high-quality polyaniline functionalized graphene nanosheets (PANI/GNS) were prepared by an interfacial polymerization method. The abundant -NH2 groups onto the surface of resulted PANI/GNS nanocomposites, and can be used as active site for growing high load rate of Pd nanoparticles (NPs). Subsequently, Pt NPs were successfully deposited on the Pd surface formed Pt-Pd/PANI/graphene nanosheets (Pt-Pd/PANI/GNS) composites. Interestingly, the shape of Pt-Pd bimetallic can be effectively controlled by simply changing the reaction parameters. The shape and structure of nanocatalysts were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrocatalytic properties of nanocomposites were characterized by cyclic voltammetry (CV). The TEM images show that the Pt-Pd nanoflowers were successfully decorated onto the surface of PANI/GNS nanocomposites. The electrocatalytic properties for dioxygen and methanol of prepared Pt-Pd/PANI/GNS nanocatalyst were investigated. The electrochemical results show that the nanocatalysts exhibit higher electrocatalytic activity for methanol oxidation and dioxygen reduction.
研究领域:
材料科学
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能源化学
·
纳米技术
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 6
·H415
·
IF 3.266
Mingshu Xiao,Xiaocai Liang,Weiwei Li,Yang Yang,Yuqing Miao
Here, the ultrafine Pt/Pd bimetallic nanoparticles (Pt/Pd NPs) were synthesized and decorated on the multi-walled carbon nanotubes (MWCNTs) modified glassy carbon electrode (GCE) for hydrogen evolution. Pt/Pd NPs were synthesized through the reduction of their metal salt mixture with tert-butylamine as reductant and polyvinylpyrrolidone as protectant. Under the observation of transmission electron microscopy (TEM), the well dispersed Pt/Pd NPs exhibit the ultrafine size of about 13 nm diameter with the good crystallinity corresponding to the (111) planes of face-centered cubic (fcc) Pt and the (200) planes of fcc Pd. The scanning electron microscopy (SEM) also shows the dispersion and anchor of Pt/Pd NPs in the matrix of MWCNTs. Electrochemical study confirms the good electrocatalytic hydrogen evolution of Pt/Pd-MWCNT in 0.5 M H2SO4, exhibiting a potential application in the future for hydrogen based energy transformation and storage.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 43
·期 8
·3284-3294
·
IF 3.343
Xiaoyang Wan,Xuefeng Wei,Juan Miao,Ruichang Zhang,Jun Zhang,Qingshan Jason Niu
Summary A wide compositional range of Pd-Ni/Cd on polypyrrole (PPy)-modified Ti plates (Pd-Ni/Cd/PPy/Ti) was fabricated via electrochemical deposition. The hydrogen absorption properties of the prepared Pd-Ni/Cd/PPy/Ti electrodes were evaluated using cyclic voltammetry and chronoamperometry in acidic media. The optimal Pd 36 -Ni 7 /Cd 57 /PPy/Ti electrode achieved a hydrogen storage capacity of 331.3 mC cm −2 mg −1 and an H/Pd ratio of 0.77. The enhancement of the hydrogen storage was attributed to a synergistic effect between the Pd-Ni/Cd catalysts. The surface morphology, crystallinity, and chemical composition of the Pd-Ni/Cd/PPy/Ti electrode were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. Hydrogen spillover occurred on the trimetallic catalysts, and secondary hydrogen spillover occurred on the PPy/Ti support. The enhanced hydrogen sorption capacity was due to both the synergistic effect of the trimetallic catalysts and the assistance of PPy, making Pd-Ni/Cd/PPy/Ti a promising hydrogen storage material.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Huan Zhang,Kai Cai,Pan Wang,Zhao Huang,Jiawei Liu,Long Wu,Mohamed F. Foda,Heyou Han
By using graphene oxide (GO) as the stabilizing and dispersing agent in aqueous solution at room temperature, Pd-based (PdTe, PdPtTe, and PdAuTe) nanotubes (NTs)/GO nanocomposites were readily prepared. The obtained GO-supported one-dimensional (1D) Pd-based NTs have relatively uniform morphology and good dispersity. The catalytical properties of PdAuTe NTs/reduced GO (rGO) nanocomposites with different metal ratios were systematically investigated after electrochemical reduction process. Pd47Au33Te20 nanotubes/rGO nanocomposites possess the optimal mass activity (5.31 mA ug–1Pd), which is 5.16-fold that of commercial Pd/C catalyst. The study provides a new strategy for clean synthesis of Pd-based NTs/GO nanocomposites, which are efficient catalysts for ethanol electrooxidation. It will probably inspire more appropriate utilization of graphene to design new hybrid materials with better properties applied in fuel cells or other related fields.
研究领域:
材料科学
·
电化学
·
催化科学
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DOI
高影响因子
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