PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·Vol. 27
·期 30
·16030-16038
·
IF 2.9
Kyong–Mi Kim,Kyong–Sik Ju,Sung–Nam Pak
The ethanol oxidation reaction (EOR) was studied on carbon-supported Pt and Pt–Mo electrocatalysts prepared by the formic acid reduction method following heat-treatment. The catalysts were physically characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrocatalytic activity of the Pt/C and Pt–Mo/C electrocatalysts for the EOR was investigated by potentiostatic and potentiodynamic measurements with pinhole on-line differential electrochemical mass spectrometry (PODEMS). The results show that the Pt–Mo/C electrocatalyst compared with Pt/C has higher ethanol oxidation efficiency and, acetaldehyde and acetic acid are majority products during the EOR under the given conditions. The CO2 current efficiencies (CCEs) on the Pt/C and Pt–Mo/C catalysts are 6.9% and 8.8% after calibration of the mass to charge signal m/z = 44, respectively, which reveals that the co-metal molybdenum produces more CO2 for ethanol electrooxidation and promotes the performance of the Pt-based anode catalyst.
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PubMed
高影响因子
RARE METALS
·
2020
·Vol. 39
·期 12
·1473-1482
·
IF 2.161
Feng Shao-Ping,Huang Kun
Abstract Separation of palladium (Pd) and platinum (Pt) by solvent extraction is difficult because of their extremely similar physicochemical properties. Development of new extractants with a high extraction efficiency and excellent separation selectivity is the primary focus for enhancing the separation of Pd and Pt by solvent extraction. In this study, a new extractant, 2-((2-methoxyethyl)thio)-1H-benzimidazole (MOBI), which contains N, S, and O atoms, was synthesized and used to separate Pd(II) and Pt(IV) from a hydrochloric acid aqueous solution. The experimental results revealed that Pd(II) and Pt(IV) were effectively separated under the optimal conditions: MOBI concentration of 0.005 mol·L −1 , HCl concentration of 0.2 mol·L −1 , organic/aqueous (O/A) phase ratio of 1.0, and contact time of 15 min. The separation coefficient between Pd(II) and Pt(IV) was 1246.40, which indicates that MOBI has a higher selectivity for Pd(II) than Pt(IV). In addition, the mechanism of coordination between Pd(II) and MOBI was demonstrated through the slope method, Fourier transform infrared spectroscopy (FTIR), hydrogen-1 nuclear magnetic resonance spectroscopy ( 1 H NMR), and carbon-13 nuclear magnetic resonance spectroscopy ( 13 C NMR). The results revealed that MOBI could coordinate with Pd(II) via the N atom in the benzimidazole ring of MOBI molecules to form [Pd(MOBI) 2 Cl 2 ] (O) . Graphic abstract
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xin Zhou,Mingyang Ma,Ruhan Zhang,Xinru Song,Wenjie Li,Jiachen Jiang,Junlin Xie,Xiaoqiang Li,Li Cai,Xueqin Sun,Pijun Gong
This paper introduces a novel approach of encapsulating Pt nanoparticles within the pores of a molecular sieve. By comparing the dispersion, reducibility and surface acid sites, the effect of the combination of molecular sieves and Pt particles on the catalytic performance of toluene was studied. The findings demonstrate that Pt nanoparticles were encapsulated within the molecular sieve framework of ZSM-5 molecular sieves using an in-situ synthesis method, exhibiting remarkable catalytic activity towards toluene oxidation (T 90 =172 ℃). Mainly due to the spatial confinement of the ZSM-5 molecular sieve framework reduces the size of Pt nanoparticles, enhances their dispersion of the Pt@ZSM-5 catalysts. In addition, the space separation effect of ZSM-5 on Pt metal enhances their interaction and promotes the valence state conversion of Pt species. It leads to a large number of acid sites and oxygen vacancies in the catalyst, which improves the adsorption and migration of toluene, thereby improving the catalytic activity. This study will provide valuable insights into the preparation of new nanocatalysts and the catalytic treatment of toluene.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Jin Chen,Ke Li,Jie Yan,Suqing Qin,Yuzhao Ma,Xiaofeng Yang,Yanjun Li
Designing heterojunction photocatalysts with staggered band structures and optimal interfacial interactions constitutes a feasible strategy to achieve superior photocatalytic performance. Herein, we synthesized a Pt@BiOBr/g-C 3 N 4 S-scheme heterojunction via in-situ construction and photochemical deposition. Notably, Platinum nanoparticles (NPs), precisely deposited via photochemical reduction, extend light absorption into the visible-NIR spectrum through localized surface plasmon resonance (SPR) while acting as electron mediators to suppress recombination. Under simulated solar irradiation, the optimized Pt@BiOBr/g-C 3 N 4 S-scheme heterojunction demonstrates complete degradation of tetracycline hydrochloride (TC-HCl) within 10 min. Additionally, the photocatalyst showed exceptional degradation efficiency for organic dyes including methyl orange (MO) and rhodamine B (RhB). More importantly, the synergistic interplay between internal electric field (IEF) and the SPR of Pt nanoparticles collectively facilitates rapid charge separation while suppressing electron-hole recombination. This study offers a path toward highly effective photocatalysts engineered for practical applications and elucidates the activity enhancement mechanism through Pt incorporation in ternary heterojunction systems.
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高影响因子
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2025
·
IF 3.8
Xian Liang,Tian Xiaoxia,Liu Zhaomin,Liu Shuxin,Zhao Jiuzhou
In this paper, ultrafine platinum nanoparticles (Pt/Co-N-C) were prepared by irradiating the mixture of Co-N-C and K2[PtCl4] with near-ultraviolet (UV) light at a wavelength of 395 nm and visible light at 450 and 550 nm without adding any reducing and stabilizing agents using MOFs-modified carbon materials (Co-N-C) as the carrier. The composition and morphology of the Pt/Co-N-C catalysts were investigated using characterization tools such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HR-TEM), etc. The results showed that the Pt nanoparticles were well dispersed on the surface of the Co-N-C, with average particle sizes of about 2.39, 2.86, and 3.53 nm, respectively. In the catalytic 4-NP reduction experiments, the catalyst (Pt/Co-N-C-1) prepared under near-ultraviolet light (395 nm) irradiation showed the highest catalytic activity with a rate constant k=0.64 min-1. After five cycles, the conversion rate was still maintained at about 90%, which was highly reusable. It was demonstrated that 395 nm near-ultraviolet light was more favorable for the modulation of the distribution of the species during the hydrolysis and reduction of platinum in this reaction to form smaller-sized platinum nanocrystals, which was conducive to the catalyst to exhibit higher activity.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Qian Zhang,Xinwen Li,Kang Chen,Ying Hu,Rongmei Liu,Guixiang Qian,Zhongliang Tian,Chao Yang
This study presents a FePO 4 -Zn/Pt hybrid power battery system designed for lithium extraction from salt lake brines. Initially, the FePO 4 -Zn battery is utilized for lithium intercalation to form LiFePO 4 , which is subsequently reassembled into a LiFePO 4 -Pt battery for lithium deintercalation. As a result, a Li + -rich aqueous solution, free from interfering metal cations, is obtained. The system eliminates the need for ion-exchange membranes, as the Pt electrode remains separated from the brine, thereby preventing contamination by impurity cations. When applied to a brine containing 0.25 g/L Li + and 73 g/L Mg 2+ , followed by desorption in a solution of 0.25 g/L Li + , only a minimal amount of Mg 2+ was transferred to the lithium chloride solution after two cycles, achieving effective lithium extraction and enrichment with an efficiency of 80.6%.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jiming Zeng,Hanyu Shi,Qian Wang,Chengchen Wang,Yukun Wang,YaXin Zhou,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic water splitting for hydrogen production and the degradation of organic pollutants are regarded as promising strategies to address the current energy crisis and environmental issues. As a wide-bandgap metal oxide, TiO 2 is characterized by low catalytic activity and a narrow range of light absorption when used alone, whereas its combination with narrow-bandgap semiconductors has been shown to lead to a significant enhancement in catalytic performance. In this study, CdS–TiO 2 composites were synthesized via a ball-milling method, after which Pt–Pd nanoparticles were deposited by photodeposition. The noble metals were found to interact with CdS and TiO 2 respectively, while a synergistic catalytic effect between Pd and Pt was also observed. The photocatalytic efficiency was further extended by the formation of CdS–TiO 2 heterojunctions, resulting in a significantly enhanced hydrogen production rate of 4656.99 μmol h −1 g cat −1 in the ternary system. Moreover, the composite demonstrated significantly enhanced performance in the photocatalytic reduction of 4-NP, The Pt–Pd NPs/CdS-Vo-TiO 2 photocatalyst achieved a 95.2 % conversion rate for 4-NP within 2 min, also demonstrating high photocatalytic activity.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jiawen Wang,Jinfu Wang,Zi Wang,Jiayue Wu,Jiaxuan Liao,Shenyuan Zhan,Xiaoye Chen,Xinhao Wang,Yongbao Wei,Qidong Zhou,Liefu Ye,Jinfeng Wu
Incontinence-associated dermatitis (IAD) leads to persistent tissue damage, antibiotic-resistant infections, and neurogenic inflammation, greatly impairing patients' quality of life. Current therapies fail to simultaneously eliminate resistant bacterial biofilms, neutralize alkaline conditions, and break the cycle of ammonia (NH 3 ) regeneration. Here, a piezoelectric gas therapy strategy based on platinum-decorated bismuth molybdate load in gelatin methacrylate (GelMA) hydrogel (Pt@BMO-Gel) is introduced. Under ultrasound excitation, Pt@BMO generates high piezoelectric potential to improve charge separation, selectively adsorbs NH 3 on BMO (001) crystal facets, efficiently degrades NH 3 to normalize pH, and enables sustained release of H 2 and NO for dual antibacterial and anti-inflammatory effects. Mechanistic insights from theoretical calculations show that the Pt (111) and BMO (001) surfaces lower energy barriers for H 2 formation and N─H bond cleavage, conducive to the generation of NO and H 2 . Transcriptomic profiling reveals downregulation of key nitrogen metabolism genes (arcC/hutH) in methicillin-resistant Staphylococcus aureus (MRSA) and disruption of the (p)ppGpp-mediated stringent response, effectively eradicating bacterial persistence via metabolic reprogramming. This study establishes Pt@BMO as an efficient piezoelectric catalyst for wound therapy, presenting a novel approach in medicine that transforms harmful NH 3 into therapeutic H 2 and NO, offering a promising treatment paradigm for infected wounds, such as incontinence-associated dermatitis.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Wenliang Wang,JiangYuan Qiu,Tao Yu,Shuming Zhang,Xingwang Niu,Rui Guo,Jinsheng Li,Xuanwen Liu
Neutral aqueous Zn-air batteries have emerged as a compelling alternative to conventional alkaline systems, retaining inherent corrosion resistance and long-term stability while preserving high theoretical energy density. However, their practical application is hindered by sluggish oxygen evolution/reduction reaction (OER/ORR) kinetics and low ionic conductivity in neutral electrolytes, which result in a substantial charge-discharge voltage gap exceeding 600 mV. To address these challenges, this study employs a facile acetonitrile-mediated photocatalytic radical strategy to synthesize TiO₂-supported platinum single-atom (Pt₁/TiO₂) photoanodes under ambient conditions. Compared to pristine TiO₂, the Pt₁/TiO₂ photoanode demonstrates a 73 % enhancement in photocurrent density (reaching 2.11 mA cm⁻²) in neutral electrolytes and retains 92 % of its initial activity after 10 h of continuous illumination. Density functional theory calculations reveal that Pt single atoms not only serve as active sites but also modulate the electronic structure of adjacent Ti atoms. This strengthened Ti 3d z ²−O 2p z ² orbital hybridization optimizes *O intermediate adsorption, thereby reducing the energy barrier (η) of the OER rate-determining step to 1.81 eV. By integrating the Pt₁/TiO₂ photoanode with a CuO photocathode, we construct a dual-electrode photo-assisted neutral Zn-air battery (DEPZAB) that achieves a low charging voltage of 0.81 V at 0.1 mA cm⁻² and a record-breaking round-trip efficiency of approximately 145 %, outperforming traditional alkaline systems in cycling stability. These findings underscore the transformative potential of single-atom engineering in advancing sustainable energy storage technologies.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Shanghua Feng,Binbin Zhao,Yu Liang,Lei Liu,Jinxiang Dong
Tungsten and aluminum were directly incorporated into SBA-15 via one-step synthesis method under an acidic medium. The W- and Al-incorporated SBA-15 was applied as support for Pt nanoparticles to catalyze glycerol hydrogenolysis toward 1,3-propanediol. A combination of the characterization techniques showed that the tungsten and aluminum were incorporated into SBA-15 homogeneously, and the platinum nanoparticles could be uniformly dispersed on the modified-SBA-15. The catalytic performance of Pt-loaded SBA-15 could be significantly improved after the incorporation of tungsten and aluminum into SBA-15, reaching a 1,3-PDO selectivity near 50% when the glycerol conversion was 66%. The glycerol hydrogenolysis reaction proceeds through a dehydration–hydrogenation process, and the enhanced 1,3-PDO selectivity greatly benefited from the synergism between Brønsted acid and Lewis acid sites, which is tightly related with the incorporation of tungsten and aluminum species on the modified SBA-15.
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Nano Select
·
2021
·Vol. 2
·期 11
·2126-2134
·
IF 0
Junwei Liang,Yuxiang Liu,Rongzheng Liu,Sufan Zheng,Zhichun Si,Duan Weng,Feiyu Kang
Preparing stable highly dispersed Pt based electrocatalyst is promising to reduce material expense of H 2 product via electrocatalytic water splitting. However, it is still a great challenge to obtain stable single atomic Pt catalysts which can be applied in acidic electrolyte. In the present work, we synthesized Pt atomic clusters on carbon quantum dots (CQDs) grafting multiwall carbon nanotube (CNT) (Pt content: 1 wt.%) catalysts and then loading the catalysts on carbon cloth (Pt content: 0.01 mg▪cm –2 ) for activity test. The overpotential of 29 mV versus RHE was obtained over 1%Pt/CQDs/CNT catalysts at the current density of 10 mA▪cm –2 , and the Tafel slope of 22 mV decade –1 was obtained, too. Especially, the catalysts showed significant stability in hydrogen evolution reactions (HER) in acidic solution, of which the overpotential was still smaller than that of 20%Pt/C after 10,000 CV cycles. CQDs provided coordinating sites for dispersing Pt atomic clusters and improved the H + concentration in adjacent area around the Pt clusters. This method provides a general strategy to design the highly efficient electrocatalysts with ultra-low precious metals for H 2 evolution in acidic electrolyte.
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Science China-Materials
·
2017
·Vol. 60
·期 11
·1121-1128
·
IF 3.956
Yang Hongchao,Wang Changhong,Hu Feng,Zhang Yejun,Lu Huan,Wang Qiangbin
The synthesis of atomic-scale metal catalysts is a promising but very challenging project. In this work, we successfully fabricated a hybrid catalyst of Ptc/Ni(OH) 2 with atomic-scale Pt clusters uniformly decorated on porous Ni(OH) 2 nanowires (NWs) via a facile room-temperature synthesis strategy. The as-obtained Pt c /Ni(OH) 2 catalyst exhibits highly efficient hydrogen evolution reaction (HER) performance under basic conditions. In 0.1 mol L −1 KOH, the Pt c /Ni(OH) 2 has an onset overpotential of ~0 mV vs. RHE, and a significantly low overpotential of 32 mV at a current density of 10 mA cm −2 , lower than that of the commercial 20% Pt/C (58 mV). The mass current density data illustrated that the Pt c /Ni(OH) 2 reached a high current density of 6.34 Amg
−1 Pt
at an overpotential of 50 mV, which was approximately 28 times higher than that of the commercial Pt/C (0.223 A mg
−1 Pt
) at the same overpotential, proving the high-efficiency electrocatalytic activity of the as-obtained Pt c /Ni(OH) 2 for HER under alkaline conditions.
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