ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Lina Xiao,Qiuping Zhang,Xinzhi Wang,Huan Zhang,Wenxuan Li,Hao Zhang,Bowen Li
Efficient solar energy storage via light-driven hydrogen (H 2 ) production presents a promising and attractive strategy for addressing the global energy crisis. The integration of platinum (Pt) co-catalyst into metal-organic frameworks (MOFs) to enhance photoinduced charge separation and transfer remains a significant challenge. Herein, a platinum–porphyrin zirconium metal-organic framework (MOF) PCN-223(Pt) is reported, and synthesized using a facile two-solvent strategy. The prepared PCN-223(Pt) is self-sensitized and contains a platinum (Pt) electron-trapping center, which confers excellent visible-light catalytic activity. Under visible-light irradiation, PCN-223(Pt) produced 732 μmol g −1 h −1 of H 2 , a 7.6-fold increase compared to the isostructural PCN-223, which lacks Pt coordination in its porphyrin rings. This improvement results from the photogenerated electrons' efficient transport to the Pt electron-trapping centers, which improves charge carrier separation. Density functional theory calculations demonstrate the positive role that Pt in PCN-223(Pt) play in optimizing the corresponding hydrogen binding energy. PCN-223(Pt) exhibits excellent recyclability, maintaining its catalytic performance across five cycles without significant degradation. These results offer a new approach for designing MOF-based highly efficient visible-light active catalysts.
研究领域:
材料科学
·
能源化学
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Ting Li,Wei Lu,Hui Tian,Yu Cao,Qianqian He,Xia Chen,Hailong Wang
The antitumor effect of Pt-based drugs is determined by their binding activity with deoxyribonucleic acid (DNA), and understanding the reaction process in a systematic manner is crucial. However, existing assays used for DNA–Pt research suffer from several issues, such as complicated sample preparation, preamplification, and expensive instruments, which dramatically limit their practical application. In this study, a novel method was presented to investigate the adducts of DNA and oxaliplatin using an α-hemolysin nanopore sensor. This approach allows for real-time monitoring of the DNA–oxaliplatin condensation process through the detection of nanopore events associated with DNA–oxaliplatin adducts. Specifically, type I and II signals exhibiting specific current characteristics were observed during the process. Typical signals with high frequency were obtained by recording the designed DNA sequence. Furthermore, the production of these signals was confirmed to be independent of homologous adducts. This finding suggests that the DNA–oxaliplatin adduct can serve as a potential sensor for detecting oxaliplatin lesions and multiple types of molecules.
研究领域:
生物物理学
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纳米技术
·
癌症研究
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2021
·Vol. 27
·期 11
·4885-4895
·
IF 2.817
Qu Yuning,Yu Zehui,Wei Dan,Chen Ling,Zheng Zhe,Xiao Ningru,Wang Lili,Yu Jianguo
Pt-based materials have widely been explored as hydrogen evolution reaction (HER) catalysts, but the high cost of Pt catalyst limits its application in HER. Therefore, we report a platinum/polyvinyl-alcohol (Pt x -PVA) catalyst with high catalytic activity and low Pt loading. Pt x -PVA catalysts with a uniform distribution of the Pt nanoparticles (NPs) have successfully been synthesized by a simple one-step hydrothermal method. The size and morphology of Pt NPs can be easily adjusted by changing the amount of Pt precursor, easy to pick out the sample with the best performance. Among them, the Pt 1.88 -PVA catalyst exhibits the best electrocatalytic activity for HER in 0.5 M H 2 SO 4 solution. An overpotential of 34 mV on Pt 1.88 -PVA catalyst is obtained at a current density of −10 mA cm −2 , which is slightly better than the overpotential of the commercial Pt/C (42 mV). Similarly, the Tafel slope of 31 mV dec −1 on the Pt 1.88 -PVA catalyst indicates that the HER process is the Volmer-Tafel mechanism. However, the Pt loading of the Pt 1.88 -PVA catalyst is 18.8% times lower than that of the commercial Pt/C. Furthermore, the Pt x -PVA catalysts exhibit an excellent stability and durability. This is due to the coating effect of PVA for Pt NPs, which limits the migration and agglomeration of Pt NPs. This study provides a new approach for reducing the Pt load in Pt-based catalyst in the field of electrochemistry.
研究领域:
电化学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yisong Zhou,Jiawei Xie,Yushuang Huang,Chang-an Zhou,Chao Wang,Lei Song,Kui Ma,Hairong Yue,Ji-Jun Zou,Bin Liang
The hydrogenative rearrangement of biomass-derived furfural offers a sustainable pathway to produce cyclopentanol (CPL) and cyclopentanone (CPO), which are traditionally obtained from fossil resources. Achieving selective synthesis of either product requires precise control over catalyst electronic structure and adsorption behavior, yet it still remains challenging. Herein, we report that both doping and tuning the spatial distance between Pt clusters effectively regulate the d -band center of active sites, enabling selective synthesis of CPO and CPL with high yields of 97.2 % and 96.0 %, respectively. Mechanistic studies suggest that reducing the spatial distance between Pt nanoclusters elevates the d -band center, thereby reducing the occupancy of antibonding states and strengthening the Pt-O bond between Pt and CPO, thus favoring CPL formation. By contrast, doping Pt with NiP lowers the d -band center, thus weakening CPO adsorption and promoting its selective synthesis. These results highlight d -band center regulation as a promising strategy for achieving selective hydrogenation.
研究领域:
催化
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材料科学
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可持续化学
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多相催化
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生物质转化
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2017
·Vol. 5
·期 8
·1558-1566
·
IF 4.21
Shao-Lu Li,Yingqin Hou,Yali Hu,Jin Yu,Wei Wei,Hua Lu
We describe here the synthesis and cell-selective delivery of a cationic Pt(IV)-backboned prodrug-like polymer P(DSP-DAEP). P(DSP-DAEP) features excellent aqueous solubility, unusually high (44.5%) drug loading, can be rapidly reduced to release the active cisplatin, and is more potent than its small molecular Pt(IV) precursor DSP. P(DSP-DAEP) can be formulated with an oppositely charged methoxyl poly(ethylene glycol)-block-poly(L-phosphotyrosine) (mPEG-b-PpY) to afford a polyion micelle (Pt-PIC) by taking advantage of polyelectrolyte coacervation. Preliminary in vitro cellular uptake and cytotoxicity assays indicate that Pt-PIC exhibits receptor (surface alkaline phosphatase)-dependent uptake and cytotoxicity. Overall, our results suggest a new approach to the improved therapeutic index of platinum-based anticancer drugs via cell-selective delivery.
研究领域:
药物化学
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肿瘤学
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生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2020
·Vol. 10
·期 2
·143
·
IF 3.52
Chengxiong Wang,Dezhi Ren,Junchen Du,Qinggao Qin,Aimin Zhang,Li Chen,Hao Cui,Jialin Chen,Yunkun Zhao
Ceria-modified Pt/Al2O3catalyst has been commonly prepared by the impregnation of platinum on ceria-modified alumina and widely applied in the chemical industry and automotive industry. The in situ diffuse reflectance infrared Fourier transformed spectroscopy (DRIFTS), and thermogravimetric (TG) analysis techniques were employed to investigate the typical mechanisms of the bis(ethanolammonium)hexahydroxyplatinate(IV) and cerium nitrate decomposition catalyzed by Ptδ+species for the facile synthesis of CeO2-Pt/Al2O3catalyst. It was found that Pt4+-catalyzed decomposition of cerium nitrate leads to the higher dispersity of ceria and forming more active oxygen species, on the basis of X-ray diffraction (XRD) and H2temperature-programmed reduction (H2-TPR) results. The in situ activity measurements were also performed to investigate the reaction mechanisms and the specific activities for the catalytic CO, NO, C3H6and C3H8co-oxidation. The results indicate that undesirable N2O by-product is formed by the selective catalytic reduction (SCR) of NO by C3H6below 350 °C. The cerium addition effectively improves the activity of catalytic oxidation, but exhibits an increased N2O yield, due to the increased reducibility.Keywords:platinum;ceria;in situ characterization;catalytic oxidation
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Jianguo Yu,Dan Wei,Zhe Zheng,Wenjie Yu,Honghui Shen,Yuning Qu,Shuya Wen,Young-Uk Kwon,Yongnan Zhao
x%Pt-Naf-CV (Pt-Nafion-Cyclic Voltammetry) catalysts with homogeneously distributed platinum nanoparticles and ultra-low Pt loading are successfully synthesized by using a facile potential cycling approach. The as-synthesized 0.8%Pt-Naf-CV catalyst exhibits an enhanced electrocatalytic activity for hydrogen evolution reaction (HER) in 0.5 M H 2 SO 4 solution, which obtains a low overpotential of 34 mV at 10 mA cm −2 . The linear sweep voltammetry (LSV) curve of 0.8%Pt-Naf-CV catalyst is almost consistent with that of commercial Pt/C. However, the 0.8%Pt-Naf-CV catalyst displays a more excellent stability and durability in comparison with commercial Pt/C. Besides, the Pt loading of Pt/C (Pt–10 wt%) is about 10 times that of 0.8%Pt-Naf-CV catalyst. The improved electrocatalytic performances are derived from the synergistic effects of Pt and Nafion. The Nafion plays a significant role as a dispersant , carrier and structure directing agent on the morphology and size of the Pt catalyst. This result contributes a promising method to enhance the catalytic activity and reduce the amount of Pt.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 28
·10002-10019
·
IF 7.367
Yanjuan Huang,Yuanfeng He,Ziyuan Huang,Yali Jiang,Weijing Chu,Xiaoqi Sun,Liangfeng Huang,Chunshun Zhao
Cisplatin (CDDP) is a potent anti-carcinogen that is widely used for various solid tumors; however, its clinical application is limited by its severe nephrotoxicity. Novel platinum–bisphosphonate polymer–metal complex nanoparticles (Pt–bp NPs), based on platinum–bisphosphonate coordination, have been established. Three polymer carriers bearing alendronate (ALN) ligands, while containing different lengths of alkyl hydrophobic chains, were synthesized. Their structures were characterized by 1H NMR, 31P NMR and FTIR. The ALN was used to coordinate to the CDDP precursor [Pt(NH3)2(OSO3)(OH2)], and the Pt–bp NPs were formed spontaneously. The Pt–bp NPs formed by the polymer carrier, ALN-PEG2k-ASAC18, which contained the poly(ethylene glycol) chain with ALN on one side and the octadecyl hydrophobic chain on the other side, was denoted as ALN-ASAC18-CDDP; its diameter was within 200 nm. CDDP was released in a Cl− or pH-dependent manner. The cytotoxic effects to the HeLa, A549 and MCF-7 cell lines were relatively weak, compared to CDDP. However, ALN-ASAC18-CDDP showed significantly prolonged blood circulation time and tumor accumulation of platinum of 2.5-fold, compared to CDDP at 8 h. Besides, ALN-ASAC18-CDDP was demonstrated to remarkably reduce systemic toxicity without compromising in vivo antitumor activity. These results indicate that the facilely prepared ALN-ASAC18-CDDP has great utilization potential for CDDP delivery in a clinical setting.
研究领域:
药剂学
·
肿瘤学
·
材料科学
·
药物递送系统
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Hehe Qian,Jianzhou Wu,Yongsheng Guo,Wenjun Fang
The catalytic properties of Pt-based alloy nanocrystals are highly dependent on their morphologies, particle sizes, and compositions, but it remains a grand challenge to obtain well-controlled nanocrystals. Herein, we report a facile but efficient synthetic strategy for the size-controlled synthesis of AgPt and AgPtAu nanoparticles. By subtle variation of initial reduction kinetics in a modified polyol method, AgPt octahedra with tunable sizes from 4.0 to 13.5 nm have been synthesized. On the basis of size-controlled AgPt seeds, AgPtAu nanoparticles with different sizes and compositions were prepared by subsequent introduction of Au. For the AgPt series, the smallest AgPt octahedra showed the highest mass activity but the poorest durability for the formic acid oxidation reaction (FAOR). Furthermore, the introduction of Au into AgPt nanoparticles brought about tremendous influences in the size- and composition-relevant electrochemical properties. The medium-sized AgPtAu with appropriate Au contents, e.g., Au28% ∼ 13.5 nm, exhibited a mass activity of 2101 mA mg–1 for the FAOR in the favored direct oxidation pathway, which was about 11.2-fold that of commercial Pt. As the electrocatalytic properties of AgPtAu displayed little decay in the accelerated durability tests of 30 000 cycles, the highly active AgPtAu octahedra showed great potentials as promising electrocatalysts for the FAOR.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Sishun Wang,Kejun Bu,Dong Wang,Chong Zheng,Xiangli Che,Zhen Han,Fuqiang Huang
A new platinum-based ternary selenide, Pt 3 Pb 2 Se 2 was successfully synthesized at 1123 K by using a traditional solid-state method. It crystallizes in a orthorhombic structure with the Cmcm space group, and consists of quasi-2D [Pt 3 Pb 2 Se 2 ] layers connected by inherent Pt–Pb bonds. It is related to the parkerite structures with half transition metal occupation. Therefore, it belongs to the half anti-perovskite family structure. The R-T curve reveals its metallic behavior and shows high conductivity (RRR = 20.5) at room temperature. The X-ray photoelectron and ultraviolet photoelectron spectroscopy spectrums were collected. It has low work function ( ϕ = −4.02 eV). First principles calculations were consistent with the experimental results.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Pengcheng Li,Zhihong Xiong,Sheng Zhu,Mengye Wang,Yongming Hu,Haoshuang Gu,Yu Wang,Wanping Chen
Pt Nb 2 O 5 porous composite ceramics have been prepared from Pt and Nb 2 O 5 particles through convenient pressing and sintering. Extraordinary room-temperature hydrogen sensing capabilities have been revealed for Pt Nb 2 O 5 composite ceramics of 1 wt% Pt, including a sensitivity over 165, response time and recovery time of 7s and 39s, respectively, for 1% H 2 in air. For 0.25% and lower concentrations of H 2 in air, ultrafast recoveries, such as a recovery time of 8s for 0.04% H 2 in air, are observed, which are singular for room-temperature hydrogen sensing. We further found a strong correlation between the resistance of Pt Nb 2 O 5 composite ceramics and hydrogen concentration in ambient oxygen-free atmospheres, and a negative temperature dependence of hydrogen sensitivity, from which a hydrogen sensing mechanism rooted in hydrogen chemisorption on Nb 2 O 5 has been established, while the ultrafast recoveries are explained in terms of a highly mobile and reactive state of chemisorbed hydrogen ions on Nb 2 O 5 .
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 51
·2204611
·
IF 15.153
Yi Rao,Yutong Wu,Xueya Dai,Ya-Wen Zhang,Gaowu Qin,Wei Qi,Song Li
Single-atom catalysts (SACs) exhibit distinct catalytic behavior compared with nano-catalysts because of their unique atomic coordination environment without the direct bonding between identical metal centers. How these single atom sites interact with each other and influence the catalytic performance remains unveiled as designing densely populated but stable SACs is still an enormous challenge to date. Here, a fabrication strategy for embedding high areal density single-atom Pt sites via a defect engineering approach is demonstrated. Similar to the synergistic mechanism in binuclear homogeneous catalysts, from both experimental and theoretical results, it is proved that electrons would redistribute between the two oxo-bridged paired Pt sites after hydrogen adsorption on one site, which enables the other Pt site to have high CO oxidation activity at mild-temperature. The dynamic electronic interaction between neighboring Pt sites is found to be distance dependent. These new SACs with abundant Pt-O-Pt paired structures can improve the efficiency of CO chemical purification.
研究领域:
催化化学
·
材料科学
✓ 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）