NANOTECHNOLOGY
·
2020
·Vol. 31
·期 13
·135703
·
IF 3.551
Ruiwen Yan,Xiaoyu Sun,Xiaoling Zhang,Jun Zheng,Baokang Jin
In the present work, Pd–Pt nanoparticle/polyaniline/carbon nanotube (NP/PANI/CNT) composites, synthesized through the uniform distribution of Pd–Pt NPs, whose single size was controlled to 2–4 nm by citric acid, on a PANI/CNT compound, served as the electrode catalysts for effective methanol oxidation. The structural characteristics were identified by x-ray diffraction, x-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy, and revealed that the Pt65Pd35 NP/PANI/CNT composite displayed superior electrocatalytic oxidation performance and vitality in various Pd–Pt NPs. The results indicated that as an excellent anode catalyst the complex would have application prospects for effective methanol oxidation.
✓ 已验证
DOI
高影响因子
PHYSICAL REVIEW B
·
2016
·Vol. 93
·期 21
·214510
·
IF 3.718
Kangkang Hu,Bo Gao,Qiucheng Ji,Yonghui Ma,Wei Li,Xuguang Xu,Hui Zhang,Gang Mu,Fuqiang Huang,Chuanbing Cai,Xiaoming Xie,Mianheng Jiang
We present a systematical study on the roles of interactions among electron correlation, electron-phonon coupling, and spin-orbit coupling in the isovalent Pd-substituted superconductor ${\mathrm{SrPt}}_{3}\mathrm{P}$. By using the solid state reaction method, the Pd element with the $4d$ orbital was successfully substituted in the strong spin-orbit coupling superconductors $\mathrm{Sr}{({\mathrm{Pt}}_{1\ensuremath{-}x}{\mathrm{Pd}}_{x})}_{3}\mathrm{P}$. As increasing the isovalent Pd concentrations without introducing any extra electron/hole carriers, the superconducting transition temperature ${T}_{c}$ decreases monotonously. In addition, combining the data of resistivity and specific heat, as well as electronic band structure calculations, we found that the electron correlation is enhanced while the electron-phonon coupling and the spin-orbit coupling are suppressed by Pd substitution. Our results may provide significant insights in the natures of the interplay among the electron correlation, electron-phonon coupling, and spin-orbit coupling in superconductivity, and may also pave a route for understanding the mechanism of superconductivity in heavily $5d$-based superconductors.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Yutao Chen,Jihui Xiang,Jinmin Xie,Xinyu Wang,Zeyu Jiang,Yanfei Jian,Mudi Ma,Chi He
SO 2 exhibits opposite effects on C 3 H 8 oxidation over Pd/SiO 2 and Pt/SiO 2 . • O 2 concentration regulates sulfur species evolution and SO 2 tolerance. • Sulfate species block Pd active sites and induce Pd particle sintering over Pd/SiO 2 . • Pt-O-O-S structures on Pt/SiO 2 promote C 3 H 8 adsorption and C-H cleavage. The oxygen concentration in industrial C 3 H 8 -containing exhausts fluctuates significantly (from 0.5 to 18 vol%). However, the intrinsic effect of SO 2 on catalytic C 3 H 8 oxidation under diverse oxygen conditions is greatly overlooked, leading to a discrepancy in the SO 2 tolerance of developed catalyst between laboratory and real-world emission conditions. Herein, the influences of oxygen contents on sulfur species distribution and subsequent sulfur tolerance of typical Pd/SiO 2 and Pt/SiO 2 catalysts during C 3 H 8 oxidation were systematically explored. Experimental results reveal that the oxygen concentration dramatically affects the types and contents of sulfur species over catalysts. For Pd/SiO 2 , SO 2 tends to be converted into sulfate (SO 4 2- ) species to cover the Pd 0 active sites and causes Pd particle sintering, thereby inhibiting the C 3 H 8 adsorption and oxidation. In sharp contrast, sulfite (SO 3 2- ) species form on Pt/SiO 2 , leading to a novel Pt-O-O-S active interface that enriches the adjacent Pt site with electrons, promoting C 3 H 8 adsorption and C-H cleavage and further enhancing catalytic activity. As oxygen concentration decreases, the impact of SO 2 on catalytic performance becomes more pronounced. Under the oxygen-lean conditions, Pd particles sintering caused by SO 2 is the most severe at 1 vol% O 2 , causing an 80 °C temperature increasing in 90% C 3 H 8 conversion; however, the contents of SO 3 2- species and Pt-O-O-S structures on Pt/SiO 2 are elevated, facilitating C 3 H 8 adsorption and activation. Our findings enrich the understanding of SO 2 behavior under different industrial conditions, providing a theoretical basis for the design of SO 2 -tolerant catalyst in diverse application scenarios. Download: Download high-res image (178KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Honghui Li,Rui Yuan,Lingshuang Peng,Lu Zhang,Jianle Wang,Yuling Li,Yaqi Qin,Dexing Chen,Wenchun Xu,Meiying Shen,Changjin Liu
Pd single-atom loaded PdCoB alloy mesoporous nanospheres (Pd-PdCoB SAMNs) exhibited exceptional peroxidase-like activity. • A electrochemical biosensor was developed using Pd-PdCoB SAMNs and DDA-Cu MOFs nanobelts for H 2 O 2 detection. • The constructed electrochemical biosensor demonstrated outstanding performance in the ultrasensitive detection of H 2 O 2 in cancer cells. Hydrogen peroxide (H 2 O 2 ), a key component of reactive oxygen species (ROS), plays a crucial role in monitoring the occurrence and progression of diseases, including cancer. However, convenient and reliable analysis of H 2 O 2 levels released from cancer cells has remained particularly challenging. Herein, we proposed Pd single-atom loaded PdCoB alloy mesoporous nanospheres (Pd-PdCoB SAMNs) and 1,5-Diamino-4,8-dihydroxyanthraquinone-Cu metal-organic frameworks (DDA-Cu MOFs) for the reliable detection of the H 2 O 2 levels. In this approach, atomically dispersed Pd anchored on PdCoB mesoporous nanospheres (MNSs) with peroxidase-like catalytic activity, with the assistance of DDA-Cu MOFs nanobelts were then modified on the glassy carbon electrode (GCE) substrate to enhance its conductivity. Benefiting from the excellent electrochemical performances of Pd-PdCoB SAMNs and DDA-Cu MOFs, a detection limit of 0.74 μM and a linear detection range of 0.1 to 0.8 × 10 4 μM was achieved, and a high accuracy was reached in distinguishing the release of tumor cell lines from that of normal cells. Empowered by the intrinsic sensitivity and selectivity, the proposed approach will lead to the development of a universal platform for reliable small molecular. Download: Download high-res image (451KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 3.6
Youjuan Tan,Qiudi Zhu,Ling Nie,Huilin Guo,Xianglin Pei,Xiaogang Yin
Chitosan-derived biomass carbon microspheres are prepared as catalyst supports. • Unique-structured chitosan microspheres enable the fabrication of tunable Pd NPs. • The catalyst achieves good dye degradation with high universality and stability. Developing highly efficient, stable and low-cost catalysts for treating dye wastewater remains challenging. In this study, palladium nanoparticles (Pd NPs) were immobilized on chitosan-derived porous carbon microspheres (CSM) via a controlled synthetic strategy to prepare Pd/CSM catalysts with tunable Pd loading. Systematic characterizations were used to analyze the structure and surface properties of these catalysts, and the catalytic performance was evaluated by degrading representative organic dyes under different conditions and through repeated cycle testing. The results indicate that the Pd loading regulates the size, dispersion, and electronic structure of these Pd/CSM, thereby influencing catalytic activity. The optimized catalyst (1.2 wt% Pd/CSM) achieved removal rates of over 99% for various dyes, retained 98% of its activity after 20 cycles and remained effective under neutral to alkaline conditions. This enhanced performance is attributed to the N/O-rich porous framework, which facilitates uniform dispersion and strong anchoring of the palladium whilst improving the adsorption and electron transfer between Pd and support. This study provides a viable strategy for designing biomass-derived, Pd-based catalysts for treating dye-containing wastewater. Download: Download high-res image (405KB) Download: Download full-size image Renewable chitosan-derived nanoporous carbon microspheres serve as the carrier to construct highly efficient, stable, and recyclable Pd nano-catalysts for rapid catalytic degradation of multiple organic dyes in industrial wastewater.
✓ 已验证
DOI
高影响因子
BIOMATERIALS
·
2026
·
IF 13.6
Yingtao Zhong,Keyan Zhang,Xinyu Li,Zhuofeng Li,Xinjia Huang,Ziwen Qiu,Junmei Nie,Jiaqi Wang,Shiying Li,Hong Cheng
Despite its critical role in treating localized breast cancer, radiotherapy (RT) rarely provokes systemic immune responses or abscopal effects. In this work, immunological profiling reveals that RT upregulates CD47 and PD-L1 expressions in tumor cells and promotes the accumulation of M2-type tumor-associated macrophages (TAMs), suggesting a potential immunosuppressive mechanism that restricts abscopal responses. To overcome this limitation, a legumain-activated radio-immunological synergist (LARIS) is rationally designed to amplify RT-induced abscopal effects through dual CD47/PD-L1 blockade and TAM repolarization. LARIS is constructed from a bispecific immune checkpoint blockade chimeric peptide (BiCCP) linking CD47-and PD-L1-blocking peptides via a legumain-cleavable linker, and co-formulated with the Toll-like receptor 7/8 agonist R848. Within the tumor microenvironment, abundant legumain can cleave LARIS to release R848 together with the checkpoint blockade peptides, thereby reprogramming TAMs toward an M1 phenotype and mitigating CD47/PD-L1-mediated immune evasion. Both in vitro and in vivo studies demonstrated that LARIS significantly enhances systemic antitumor immunity and effectively induces abscopal responses of RT, thus suppressing the growth of distant and rechallenged tumors. Overall, this work offers a promising strategy to counteract RT-induced immunosuppression and potentiate abscopal effects for improved breast cancer therapy.
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL IMMUNOPHARMACOLOGY
·
2026
·
IF 5.6
Songping Wang,Shuai Zhou,Jiankang Huang,Qing Pang,Hao Jin,Huichun Liu
This study elucidates how H3K4 methylation-driven upregulation of Calbindin 2 (CALB2) promotes immune evasion and chemoradioresistance in cholangiocarcinoma (CCA). Integrated bioinformatics analyses identified CALB2 as a hub gene linked to an immunosuppressive microenvironment. In vitro, CALB2 knockdown suppressed tumor cell proliferation, migration, invasion, and calcium signaling—evidenced by reduced phosphorylation of CaMKII, PKC, and NF-κB—while increasing apoptosis. Mechanistically, CALB2-activated NF-κB transcriptionally upregulated Keratin 7 (KRT7), which subsequently induced PD-L1 expression. This CALB2/KRT7/PD-L1 axis impaired T cell activation, reducing CD69 and IFN-γ expression. In vivo, CALB2 silencing inhibited tumor growth, downregulated PD-L1 and Ki-67, and enhanced apoptosis. Notably, CALB2 knockdown significantly sensitized CCA tumors to gemcitabine plus radiotherapy, an effect attenuated by KRT7 overexpression. These findings define a novel H3K4 methylation/CALB2/calcium/NF-κB/KRT7/PD-L1 signaling axis that drives immune suppression and therapy resistance in CCA, highlighting its potential as a multi-target strategy for combined immunotherapy and chemoradiotherapy.
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Qiaozhi Han,Chengxu Li,Yunshu Wang,Ziwei Ma,Chengyu Duan,Yucong Yin,Zichen Bao,Yonghao Shen,Chenwen Yin,Zhuofeng Hu,Qiming Sun
Abstract The direct synthesis of hydrogen peroxide (H2O2) from H2 and O2 provides a sustainable route for decentralized oxidant production, but its practical use is limited by inefficient Pd utilization, undesired H2O2 decomposition, and the need for high noble-metal loadings. Here, we report a Ni(OH)2-promoted Pd@S-1 catalyst that integrates zeolite confinement with interfacial electronic modulation for efficient aqueous H2O2 synthesis. The optimized Pd4Ni1@S-1-H catalyst delivers an H2O2 productivity of 3.39 mol gPd–1 h–1 under acidic conditions, representing the highest value among reported semibatch glass reactor systems and a 10-fold improvement in Pd utilization efficiency relative to a commercial Pd/C catalyst. Advanced spectroscopic analysis and density functional theory calculations reveal that Ni(OH)2 donates electrons to Pd, lowering the average Pd valence state from 1.83 to 1.39, and serves as a hydrogen-transfer bridge that promotes hydrogen migration to the *O–O intermediate. Meanwhile, hydrophobic silicalite-1 (S-1) zeolite micropores enrich dissolved H2/O2 and suppress secondary H2O2 decomposition by facilitating product desorption. The resulting in situ H2O2 generation system enables efficient Cr(VI) reduction, highlighting its potential for sustainable water remediation.
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 36
·e74556
·
IF 2.3
Dezheng Chang,Yan Gao,Qi Shi,Shihao Liu,Fangfang Guo,Zhiguo Ye
This study investigates the electrocatalytic performance of the Pd-based catalysts for ethanol oxidation (EOR) and methanol oxidation reaction (MOR) by incorporating dysprosium (Dy), nitrogen-doped carbon (NC) as the catalyst support. Subsequently, the PdDy/NC catalysts with different Pd and Dy loadings are prepared using impregnation method, PdDy/NC-1 (4.6 wt% Pd and 4.2 wt% Dy), PdDy/NC-2 (6.5 wt% Pd and 2.4 wt% Dy), PdDy/NC-3 (7.9 wt% Pd and 0.8 wt% Dy), including Pd/NC (8.9 wt%), Dy/NC (9.0 wt%), and PdDy/C (6.5 wt% Pd and 2.3 wt% Dy). The morphologies, structures, and compositions of the catalysts are characterized by XRD, TEM, XPS, and SEM. Their electrocatalytic performance for the EOR and MOR are evaluated. The EOR and MOR test results indicate that the PdDy/NC-2 catalyst exhibits much superior performance compared to other as-obtained catalysts, its mass activity for the EOR reaches 1.610 A mg −1 Pd , MOR-1.640 A mg −1 Pd . After the 4000 s stability test, PdDy/NC-2 also shows superior durability compared to as-prepared other catalysts. The enhanced performance of PdDy/NC-2 is likely attributable to the synergistic interaction among N, Pd, and Dy, which significantly improves the electrocatalytic behaviors of the Pd-based catalysts, along with the additional active sites probably provided by the nitrogen doping. Graphical PdDy/NC with various Pd and Dy loadings are obtained via impregnation method. PdDy/NC-2 (6.5 wt% Pd and 2.4 wt% Dy) shows most excellent catalytic property for the EOR and MOR. The Dy/N doping and electron interaction (Dy → Pd) could improve the electrocatalytic performance of the Pd-based catalysts.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Huijin Chen,Huan Zhang,Xinyu Huang,Yakai Hao,Mingqiu Bao,Ruirui Yue,Jinbing Shu,Baoyang Lu
A qualified anode catalyst is the crucial component for one direct alcohol fuel cell. To facilitate the practical application of direct ethylene glycol fuel cells (DEGFCs), it holds significant importance to develop an anode catalyst with low cost, relatively high catalytic activity and reliable stability toward ethylene glycol oxidation reaction (EGOR). In this study, an in-situ polymerization method was employed to synthesize polydopamine (PDA)-functionalized reduced graphene oxide (rGO) as an efficient support for palladium nanoparticles (Pd NPs), ultimately resulting in the fabrication of a high performance Pd/PDA-rGO catalyst. Multiple physical characterization techniques confirm the consistent distribution of Pd NPs on the porous and fluffy PDA-rGO compound with open-textured structure. In the catalyst, rGO functions as a conductive component to boost the electronic conductivity of PDA and facilitates the formation of the wrinkled structure. Meanwhile, PDA granules can promote proton conductivity and prevent the aggregation of rGO. The unique morphological features of granular PDA and wrinkled rGO synergistically promote uniform Pd NPs distribution and improve their catalytic performance. The electrochemical evaluation of the EGOR was performed and it is found that the optimized Pd/PDA-rGO catalyst has remarkable mass activity and specific activity, which reached 3391.7 mA mg Pd −1 and 22.2 mA cm −2 . It also shows improved intrinsic activity, with a conversion frequency of 4.6 s −1 and excellent stability. The mass activity of Pd/PDA-rGO is about 8 times that of commercial Pd/C. This work establishes PDA-rGO as an ideal catalyst support and provides a strategy for designing advanced electrocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Dexu Liu,Keyu Liu,Huifu Chi,Shan Gao,Shuangqing Fu,Wei Li,Honglei Zhang
Poly(3-hydroxybutyrate) (PHB) has emerged as a promising biodegradable polymer with extensive potential for diverse applications. When modified with chitosan (CS), PHB demonstrates enhanced metal-loading capabilities, significantly expanding its utility in environmental fields. In this study, a green heterobimetallic gold (Au) and palladium (Pd) catalyst (designated as Au/Pd@PHB-CS), was synthesized through a sequential coordination reduction process on the surface of the PHB-CS nanosphere. The resulting bimetallic nanoparticles on the nanosphere predominantly exhibit a particle size of approximately 4.0 ± 0.9 nm and expose a substantial number of highly active crystal planes. Catalysts possess adsorption capacities for three pollutants: congo red (CR), methylene blue (MB) and 4-nitrophenol (4-NP). Besides, catalysts with low bimetallic loading of Au (0.11 wt%) and Pd (0.11 wt%) show significant removal efficiencies for the three pollutants. Notably, in the degradation of CR, the catalyst exhibits complete reduction of CR with exceptionally fast reaction kinetics. Furthermore, the catalyst maintains a high catalytic activity (95%) after multiple cycles of utilization. Compared to monometallic Au or Pd catalysts, bimetallic catalysts exhibit significantly enhanced reaction activity due to the synergistic interaction between the two metal components. This improved catalytic performance underscores the potential of PHB-based materials as effective catalyst supports, broadening their research and application prospects in catalysis.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Qiu Yu,Sun Mingzi,Wu Jiandong,Chai Chunxiao,Wang Shengwei,Huang Hong,Zhao Xiao,Jiao Dongxu,Xu Shan,Wang Dewen,Ge Xin,Zhang Wei,Zheng Weitao,Song Yujiang,Fan Jinchang,Huang Bolong,Cui Xiaoqiang
The efficiency of the oxygen reduction reaction (ORR) is limited by the scaling relationship in the conventional oxygen associative pathway. To break such limitations, we present an approach to effectively activate the oxygen dissociative pathway through co-confining single p -block (In, Sn, Pb) atoms and interstitial H atoms within Pd metallenes, leading to good ORR performance. PdPbH x metallenes exhibit a high mass activity of 1.36 A mg −1 at 0.95 V (vs. RHE), which is 46.9 times higher than that of the benchmark Pt/C. The minimal performance decay after 50,000 potential cycles confirms a good stability. In situ vibrational spectroscopy investigations and theoretical calculations highlight that interstitial H atoms facilitate the direct dissociation of O 2 while single Pb atoms enhance O 2 adsorption strength. The electroactive PdPbH x metallenes is attributed to the up-shifted Pd-4 d orbitals induced by H and Pb atoms. This research supplies critical inspiration for developing highly efficient ORR electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）