CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Wenwei Zhang,Wei Zhou,Haichen Lai,Xueqin Ma,Xingguang Zhang
Catalytic transformation of bio-derived compounds to value-added chemicals and liquid fuels plays a significant role in biomass utilization and essentially depends on catalyst design. The active-sites threshold over Pt/Ti 3 Al x C 2 T y catalysts in selective hydrogenations (e.g., phenol and furfural) were identified, and XRD, TEM, XPS and FT-IR were conducted to analyze crystal structures, morphologies, chemical states, and adsorptive properties. The catalytic results of phenol hydrogenation demonstrated that the catalysts completely lost activity when Pt loading was 0.25 %wt. FT-IR analyses of phenol-adsorbed catalysts and supports showed that the threshold resulted from the massive adsorption of phenol molecules that occupied Pt active sites, suppressing H 2 adsorption. By addition of Au nanoparticles, the phenol hydrogenation occurred over bimetallic Au 0.8 -Pt 0.2 /Ti 3 Al x C 2 T y , whereas merely Au nanoparticles were inactive for phenol hydrogenation. The findings could inspire peer researchers to design supported metal catalysts and regulate adsorption or interaction between catalyst surfaces and reactants.
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Kun Shang,Dongsheng Tang,Minhui Cui,Hongyi Hou,Bing Xiao,Jinjian Liu,Ruoshi Zhang,Rui Kuai,Jianfeng Liu,Haihua Xiao,Fan Huang,Jianliu Wang
Cisplatin is a first-line, broad-spectrum anti-tumor drug used to treat various types of cancer. However, immune-suppressive tumor microenvironments (TME) are often induced by cisplatin. Here, a first synthetic high-density lipoprotein (sHDL) nanodisc, referred as sHDL@Pt, is engineered to load a Pt(IV) prodrug (C2-Pt(IV)-C12), inducing a 2.2-fold increase in dsDNA release compared to cisplatin. This further activates the innate immune system through the cGAS-STING pathway. Using near-infrared II fluorescence imaging and single photon emission computed tomography imaging technology, it is found that sHDL@Pt can be effectively accumulated in tumor sites. The sHDL@Pt can induce severe DNA damage, which subsequently results in a more pronounced activation of the cGAS-STING pathway, further promoting dendritic cell maturation and T cell proliferation, triggering strong cytotoxic T lymphocyte responses, and inhibiting tumor growth. This work introduces a novel approach for delivering Pt(IV) prodrug that effectively initiates and activates innate immunity through the activation of the cGAS-STING pathway.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Wen-Qi Zhu,Dong Cheng,Lin-Song Li,Peng-Wei Chen,Bang-Bang Liu,Mei-Xia Zhao
This work introduces the rational design of a hierarchically structured, multi-enzyme integrated therapeutic platform, referred to as HCuS/Ag/Pt/ICG/DOX (CAPID). The platform is constructed by depositing dual-enzyme-active Ag/Pt on copper sulfide nanoparticles (CuS NPs) to remodel the tumor microenvironment (TME), followed by loading indocyanine green (ICG) as a near-infrared (NIR) fluorophore and doxorubicin (DOX) as a chemotherapeutic payload. The CAPID platform utilizes catalase to decompose H 2 O 2 into oxygen (O 2 ), which synergizes with endogenous H 2 O 2 to initiate a Fenton-like reaction, generating cytotoxic hydroxyl radicals (·OH). The redox cycling between Cu 2 + ions and intracellular thiols depletes GSH, amplifying oxidative stress cascades. NIR irradiation achieved 88.9 % tumor inhibition via spatiotemporal tri-therapy (chemo/PDT/PTT) synergy, thereby addressing the limitations of monotherapy through nanoplatform engineering.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qing Guo,Xiulin Wang,Fan Yang,Shuhui Zhou,Kexin Wei,Yu Zhang,Li Sun,Siyuan Sun,Hongchen Liu,Junpu An,Yang Sun,Peidi Shen,Yongfeng Li
Rational design and preparation of single-atoms (SAs) catalysts with high atom efficiency and anion intercalation offer a promising way to enhancing the catalytic activity of sodium borohydride (NaBH 4 ) hydrolysis. Herein, Pt SAs loaded on borate anion-intercalated Co(OH) 2 nanoflakes (Pt/Co(OH) 2 -B) were synthesized by boron-assisted method and wet impregnation method, achieving a massive metal loading of 9.8 % for the Pt SAs through the oxidation of Co(OH) 2 -B. The optimal catalyst loaded with 6.1 % Pt SAs (Pt M /Co(OH) 2 -B) has a turnover frequency (TOF) of 956.34 mol H2 min - 1 mol Pt -1 , a hydrogen generation rate (HGR) of 9315 mL min - 1 g -1 cat at 30 °C, and a low activation energy of 47.31 kJ mol - 1 for NaBH 4 hydrolysis, outperforming most of the reported noble metal catalysts. The Co element attracts the electrons of Pt SAs, causing Pt SAs to be in an electron-deficient state, which accelerates the adsorption of H 2 O and promotes the hydrolysis rate of NaBH 4 . The remarkable performance is primarily attributed to the synergistic interaction between Pt SAs and α-Co(OH) 2 -B, with a slight shift in the d-band center optimizing the electronic structure of the hydrolysis reaction and reducing the binding energy, thereby achieving exceptional catalytic performance. Density functional theory (DFT) calculations demonstrate that the electronic synergistic interaction between Pt and α-Co(OH) 2 -B reduces the adsorption energy of BH 4 - and H 2 O. The interaction further lowers the energy barrier of B-H bond cleavage as the rate-determining step, thereby accelerating the hydrolysis rate of NaBH 4 . This work provides an innovative approach for the development of green hydrogen production catalysts.
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DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 16
·26354-26368
·
IF 4.3
Shengwen Shu,Ruojun Yu,Han Qiu,Longlong Shu,Yongling Lu,Zhen Wang
To realize passive vibration monitoring of power transformers, this study proposes a self-powered method for transformer vibration monitoring sensors based on the Sm-doped-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) piezoelectric bimorph array. This study conducts the theoretical analysis and field measurement of the transformer vibration signals. In addition, the preparation method of a high-performance Sm-doped-PMN-PT piezoelectric bimorph is investigated. The properties of the xSm-PMN-yPT ceramics are also analyzed. Further, the output voltage and power characteristics of the piezoelectric bimorph arrays with different combinations are compared. Finally, the validation and application of the prototype are presented. The experimental results show that the 2.5%Sm-PMN-32PT has a high piezoelectric coefficient (d33) of 1710 pC/N. The results also indicate that the piezoelectric self-powered device with a parallel structure consisting of nine piezoelectric bimorphs has a maximum power generation of 2.341 mW under the measured transformer vibration excitation. Moreover, it is shown that it takes 75 min to complete the charging of the 7.5 V-1-F faradic capacitor from 4.4 to 5 V to satisfy the condition for the required energy of 2.82 J for the vibration signal acquisition, processing, and transmission, realizing the intermittent passive vibration monitoring of the transformer for 16 times per day. Therefore, the proposed method has a promising engineering application prospect.
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高影响因子
HYDROMETALLURGY
·
2022
·
IF 4.217
Dechao Xiao,Haitao Zhou,Kaihui Cui,Kun Huang
This study proposes a new thin-layer oil membrane (TOM) extraction strategy for enhanced mutual separation of Pd(II) and Pt(IV) chlorocomplex anions in concentrated aqueous hydrochloric acid solutions using di- n -butyl sulfoxide (DBSO) as an extractant. It was discovered that Pd(II) could be preferentially extracted even in concentrated hydrochloric acid solutions. The separation coefficient between Pd(II) and Pt(IV) considerably increased than that between them during conventional extraction using a separating funnel. A new extractor was designed to perform TOM extraction by spreading a thin layer of organic extractant liquid membrane on the surface of aqueous feed solutions under laminar flow . A simplified TOM extraction model and controlled experiments were used to investigate the effect of H + and Cl − ion concentrations on the mutual separation between Pd(II) and Pt(IV). Molecular dynamics (MD) simulations were used to understand the microscopic separation mechanisms at the molecular level. Experimental results revealed that the competitive distribution of H + and Cl − ions in the boundary layer along the normal vertical direction of the organic-aqueous interface are crucial in enhancing the separation between Pd(II) and Pt(IV). The competitive adsorption and enrichment of Cl − ions at the interface prevent DBSO molecules from being protonated by H + ions, which is beneficial for the substituted coordination of DBSO molecules with PdCl 4 2− . However, the ionic association of protonated DBSO molecules with PtCl 6 2− remains dominant at the interface. As a result, even in concentrated hydrochloric acid solutions, the difference in mass transfer between PdCl 4 2− and PtCl 6 2− toward the interface was intensified.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Zeyu Liu,Kefan Song,Bingqian Yang,Handan Qiao,Yawei Yu,Yi Wang,Xiulan Hu
The key to direct methanol fuel cells (DMFCs) is the anode catalyst for methanol oxidation reaction (MOR) which has good catalytic activity and stability. Pt@CoO x @N-C catalysts were synthesized by compounding Pt nanoparticles and CoO x with nitrogen-doped porous carbon (N-C). Pt nanoparticles were prepared by solution plasma technique. CoO x @N-C are derived from zeolitic-imidazolate-framework-67 (ZIF-67) by heat treatment at 700 °C. For MOR, Pt@CoO x @N-C exhibits an outstanding electrocatalytic performance (mass activity of 2400 mA mg Pt −1 ) and stability (70% remained after 300 cycles) under acidic condition, which owing to the synergistic effects among the Pt nanoparticles , CoO x and nitrogen-doped porous carbon. Pt@CoO x @N-C shows such mass activity superior to that of Pt/C (460 mA mg Pt −1 ) due to the fact that CoO can adsorb –OH in the solution and then assist Pt to oxidize the CO-like intermediates to CO 2 which improves the resistance to CO poisoning of Pt nanoparticles . Therefore, solution plasma method assisted with metal-organic frameworks have good development prospects on synthesis of highly efficient electrocatalysts .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chao Wang,Long Kuai,Wei Cao,Harishchandra Singh,Alexei Zakharov,Yuran Niu,Hongxia Sun,Baoyou Geng
The preparation of oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) catalysts with high activity, stability and low platinum loading has always been the focus of research. The single-atom platinum supported catalyst greatly improves the utilization of platinum, but the catalytic activity and selectivity are greatly affected by the platinum coordination environment, and the preparation of the material is difficult. Doping base metals to adjust the electronic structure of platinum is an effective strategy to improve catalyst performance. In this work, copper-platinum alloy nanoparticles were loaded on N-doped porous carbon via a targeted route guided by highly dispersed Cu atoms derived from MOF. The product C-ZIF-CuPt has high activity and high stability ORR, HER bifunctional catalytic performance, which is better than commercial Pt/C (20 wt%). The Pt activity in C-ZIF-CuPt is 4.4 times (ORR) and 6.7 times (HER) than Pt/C. Spectromicroscopic determinations unveiled that strong interactions between carbon carrier and the CuPt alloys contribute to the overall stabilities. DFT calculations show that Cu doping can increase the d-band center of Pt, reduce the ORR overpotential, and the activation energy barrier to water molecules, which is beneficial to ORR and HER catalysis. Under the same carrier conditions, the performance of sub-nano (single atoms, clusters) platinum-supported catalysts (C-ZIF-Cu-Pt) is inferior to C-ZIF-CuPt. This further shows that platinum alloying can effectively improve the performance of the catalyst.
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高影响因子
eScience
·
2022
·
IF 0
Ziyun Li,Wentao Wang,Qizhu Qian,Yin Zhu,Yafei Feng,Yangyang Zhang,Huaikun Zhang,Mingyu Cheng,Genqiang Zhang
A hybrid catalyst structure can provide abundant active sites and tailored electronic properties, but the major challenge lies in achieving delicate control over its composition and architecture to improve the catalytic activity toward different electrochemical reactions simultaneously. Herein, we present the rational design of a magic hybrid structure with low Pt loading (5.90 wt%), composed of CoPt 3 and CoPt nanoparticles supported on N-doped carbon (CoPt 3 /CoPt⊂P L NC). Importantly, it shows superior multifunctional catalytic activity in alkaline conditions, requiring a low overpotential of 341 and 20 mV to achieve 10 mA cm −2 for the hydrazine oxidation reaction (HzOR)/hydrogen evolution reaction (HER), respectively, and it delivers a half-wave potential of 0.847 V for the oxygen reduction reaction (ORR). Theoretical calculations reveal that the metal–carbon hybrid modulates kinetic behavior and induces electron redistribution, achieving the energetic requirements for multiple electrocatalysis. We demonstrate sustainable H 2 production utilizing solely the CoPt 3 /CoPt⊂P L NC catalyst, without external electric power input, suggesting its inspiring practical utility.
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DOI
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Huihui Zhang,Lushi Tan,Zhejuan Zhang,Guirong Zhang,Jiaxing Lu
In this work, different mass percentage of activated carbon (YBC) doped carbon paste electrodes (YBCPE) were firstly prepared, then electrodeposition of Pt nanoparticles was performed at a constant potential -0.1 V vs. Ag|AgCl|KCl (3 M) to prepare working electrodes Pt/YBCPE. It was shown that Pt/YBCPE(16%) exhibits the highest mass activity for formaldehyde oxidation compared to platinum deposited on pure carbon paste electrode (CPE) and other YBCPE(X%) electrodes. Afterwards, poly-o-anisidine (POA) film was prepared by electro-polymerization onto the CPE and YBCPE(16%) in o-anisidine monomer solution at 0.7 V and then Pt nanoparticles were electro-deposited at the POA film surface for fabrication of the Pt/POA/CPE and Pt/POA/YBCPE composite electrodes. The morphology of the composite electrodes was characterized by SEM, TEM, XRD and XPS which revealed that the presence of YBC and POA in the composite electrodes significantly improves the dispersion of Pt nanoparticles on the electrodes. Electrochemical impedance spectroscopy (EIS), chronoamperometry and cyclic voltammetry were used to verify the conductivity and durability of the composite electrode and its electro-catalytic activity. The obtained results indicated that the Pt/POA(16mC)/YBCPE(16%) exhibits excellent electro-catalytic activity towards the formaldehyde oxidation owing to the synergistic effect of the support-catalyst. Some comparisons for the electrooxidation of formaldehyde and the electrooxidation of methanol and formic acid on the composite electrodes also were conducted.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chong Yao,Jiwei Wu,Limei Pan,Lu Yu,Jie Luo,Jinjin Shan,Jie Liu,Chunshan Lu,Feng Feng,Xiaoliang Xu,Lili Lin,Yuxue Yue,Qingtao Wang,Jia Zhao,Qunfeng Zhang,Xiaonian Li
N-doped carbon materials were synthesized using a straightforward salt template method for Pt metal modification, resulting in a reduction in particle size from 4.8 nm to 2.1 nm due to the interaction between Pt and the carrier. The hydrogenation activity of nitrobenzene increased by 4.5 times compared to undoped catalysts. Additionally, the electronic effects of N and Pt enhanced the selectivity of p-aminophenol by up to 20.4 %. The anchoring of Pt by N improved the stability of active metal centers in a strong acidic system, thereby retarding Pt loss. Theoretical calculations and characterization revealed that the enhancement of activity relied on the high dispersion of Pt, while the improvement in product selectivity was associated with changes in the adsorption strength of the phenylhydroxylamine intermediate. N anchoring of Pt, inducing an electron effect, disentangled the activity and selectivity of nitrobenzene hydrogenation for the preparation of p-aminophenol.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Zihan Wei,Zhenyin Hai,Mohammad Karbalai Akbari,Zhenting Zhao,Yongjiao Sun,Lachlan Hyde,Francis Verpoort,Jie Hu,Serge Zhuiykov
Surface functionalization of two-dimensional (2D) WO 3 nanofilms by noble metal (NM) nanoparticles (NM = Ag, Pt and Pd) was successfully achieved for the first time via combination of the atomic layer deposition (ALD) process and electrochemical deposition method. Deposited NM nanoparticles were uniformly in the particle size and homogeneously dispersed on the surface of 2D WO 3 . They represented electrochemically active metal-semiconductor hybrid nanocomposites with the larger electroactive area, and consequently, substantially enhanced the electrochemical H 2 O 2 detection of the device based on functionalized 2D WO 3 nanofilms. Functionalization by Ag was found to be more efficient compared to the same functionalization by Pt and Pd nanoparticles. Particularly, Ag 200 -WO 3 nanofilms exhibited the best electrochemical performance with a high sensitivity of 282 μA mM cm −2 , extremely wide linear H 2 O 2 concentrations range from 0.2 μM to 33.6 mM, a low detection limit of 0.1 μM, fast response time of 2 s and an excellent selectivity and long-term stability. Surface functionalization by NM nanoparticles approach has clearly demonstrated the great potential in the development of hybrid nanostructured electrode for various devices with enhanced electrochemical capabilities.
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高影响因子
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