Surfaces and Interfaces
·
2025
·
IF 6.3
Haotian Li,Hongyi Li,Zicong Yang,Jiayi Xu,Jiangwen Xu,Jinxu Song,Yukun Chang,Hui Song,Xiaoyu Ma,Rui Pan,Shujun Chen
Introducing other non-precious metals and tailoring the structure to develop Pt-based alloy catalysts is a viable strategy to reduce Pt massive consumption, enhance Pt utilization, and improve the performance of electrocatalysts. In this study, a novel kind of Pt-Co nanoframe alloy catalyst with a hierarchical nanostructure and two distinct particle morphologies has been obtained by using a simple synthetic method. The unique multi-level core-shell structure imparts higher intrinsic activity and conductivity to the Pt-Co Core-shell Nano particles (Pt-Co CSNP), facilitating efficient charge transfer and enhancing both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities. At a current density of 10 mA cm -2 , the Pt-Co CSNP demonstrates excellent electrocatalytic performance, exhibiting overpotentials of 14.7 mV for HER in 0.5 M H 2 SO 4 and 200 mV for OER in 1.0 M KOH, which is a significant improvement over the performance of numerous reported catalysts. According to the mass activity calculation, the Pt-Co CSNP exhibit mass activities of 5.55 and 3.17 A mg Pt -1 for HER and OER, respectively. These values are improved by a factor of 22 and 35 times compared with those of commercial electrodes (Pt/C 20 %, RuO 2 ) at the same overpotential. After 300 h of operation, the catalyst shows minimal performance degradation, making it one of the most effective catalysts for dual-function HER/OER catalysis.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Liang Xian,Shu Xin Liu,Jing Ma,Xiao Xia Tian,Wei Li,Zhao Min Liu
C60 has a spatial confinement effect as a carrier for Pt nanoparticles. In this paper, highly dispersed and uniformly sized ultrafine Pt nanoparticles (Pt/C60-A) were synthesized by a photoinduced method using green ascorbic acid as an auxiliary reducing agent in the presence of C60 space-confined. It was found that the morphology of Pt nanoparticles could be modulated by adjusting the wavelength of light (395 nm UV and 450 nm blue-violet, 650 nm red). Changing the concentration of the auxiliary reducing agent regulated the Pt nanoparticle loading and dispersion. In addition, an electron-rich surface is formed on the surface of Pt nanoparticles synthesized under strong metal-support interaction (SMSI). In the methanol oxidation reaction, the catalyst (Pt/C60-A3) prepared by 3 mL of 180 mM reductant, synergistically irradiated with blue-violet light (450 nm), showed catalytic activity and durability that were significantly better than those of commercial Pt/C catalysts. The catalytic performance of Pt/C60-A3 was unchanged before and after the durability test and showed high durability. In addition, Pt/C60-A3 also exhibits high catalytic activity and durability in the reduction of p-nitrophenol (4-NP), with an apparent rate constant (k) of up to 0.54 min-1, and the catalytic activity is still maintained at about 87% after seven cycles of the 4-NP reaction. This study provides a new insight and method for synthesizing and applying noble metal nanoparticles.
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Catalysts
·
2025
·Vol. 15
·期 11
·1005
·
IF 4
Kuo Zhou,Jialin Xu,Shengrong Guo,Hongjun Wu
The catalytic synthesis of 1,2-pentanediol from biomass-derived feedstocks is of remarkable significance for addressing current environmental challenges and energy crises. In this paper, a series of Pt-based catalysts were prepared and evaluated in the hydrogenolysis of furfuryl alcohol. The 5Pt0.5Y/MgO provided a 1,2-pentanediol yield of 68.9% and a tetrahydrofurfuryl alcohol yield of 19.8% with 98.1% conversion of furfuryl alcohol, at 200 °C and 2 MPa H2for 10 h. The promotional effect of yttrium on the catalytic performance was investigated through catalytic reaction and comprehensive characterization. It was found that the reducibility of Pt species was suppressed by the introduction of Y species, resulting in reduced activity compared to the 5Pt/MgO catalyst. However, the addition of Y notably shifted the reaction pathway towards 1,2-pentanediol formation at the expense of tetrahydrofurfuryl alcohol selectivity. This increase in 1,2-pentanediol selectivity was attributed to a higher concentration of medium-strength basic sites on the Y-modified Pt catalyst. Furthermore, the strong interaction between Y2O3, Pt particles, and the MgO support led to high Pt dispersion and stability on the MgO surface, consequently yielding satisfactory recyclability.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Yunyun Lin,Wenbo Li,Yuanyuan Cui,Yaying Li,Haifeng Wang,Qi Xiao,Wei Luo
Monolithic photocatalysts present a transformative paradigm to reconcile the activity-stability-recovery trade-off inherent in conventional powder systems for photocatalytic hydrogen evolution. This study demonstrates a low-temperature synthesis of mesoporous Pt/Cu/TiO2–N catalysts in situ grown on frosted glass (Pt/Cu/TiO2–N/FP), where nitrogen doping amplifies Ti–O–Ti vibrational coupling and the hierarchical mesostructure creates sufficient active sites. The engineered Pt–Cu dual-cocatalyst system achieves exceptional synergy: Pt nanoparticles drive proton reduction while Cu2+ species prolong charge carrier lifetime through the Cu2+/Cu+ redox cycle, collectively enabling light absorption to the visible range. With optimized dual cocatalyst decoration (1.1 wt % Pt, 0.3 wt % Cu2+), the monolithic mesoporous architecture delivers a stable hydrogen evolution rate of 187.1 μmol h–1. Importantly, our mild fabrication strategy (NH3 treatment at 100 °C, Cu2+ grafting at 60 °C) establishes a generalizable protocol for temperature-sensitive substrate functionalization. This work pioneers a dual-engineering approach combining substrate-compatible synthesis with electronic structure modulation, offering a pathway toward industrially viable solar hydrogen reactors.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yao Lv,Aoran Li,Jiajie Ye,Haifeng Wang,Peijun Hu,Kuan-Wen Wang,Yun Guo,Xuan Tang,Sheng Dai
Atomic-scale insights into the interactions between metals and supports play a crucial role in optimizing catalyst design, understanding catalytic mechanisms, and enhancing chemical conversion processes. The effects of oxide support on the dynamic behavior of supported metal species during pretreatments or reactions have been attracting a lot of attention; however, very less systematic integrations are carried out experimentally using real catalysts. In this study, we here utilized facet-controlled CeO2 as examples to explore their influence on the supported Pt species (1.0 wt %) during the reducing and oxidizing pretreatments that are typically applied in heterogeneous catalysts. By employing a combination of microscopy, spectroscopy, and first-principles calculations, it is demonstrated that the exposed crystal facets of CeO2 govern the evolution behavior of supported Pt species under different environmental conditions. This leads to distinct local coordinations and charge states of the Pt species, which directly influence the catalytic reactivity and can be leveraged to control the catalytic performance for CO oxidation reactions.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Qiaomei Yuan,Lin Li,Yurong Tang,Xinfeng Zhang
In this work, we reported a photocatalytic biosensor for visual detection of superoxide dismutase (SOD) based on Pt-doped graphite phase carbon nitride (g-C 3 N 4 ). Upon illumination by a violet light-emitting diode (LED), Pt-doped g-C 3 N 4 absorbed the light energy and catalytically produced O 2 − which further oxidized the dyes into a colorless end product. In the presence of SOD, it can specifically catalyze O 2 − into oxygen and hydrogen peroxide, leading to a reduced photooxidation and a visual color display. After screening a series of dyes, the azo dye amaranth (AM) was proven to be the best indicator for O 2 − since the azo bond is active and easily oxidized by O 2 − , resulting in a low background. Such a simple photocatalytic sensor allows visual detection of SOD at a nM level without the need of any sophisticated instrument; using spectrometry, the linear response for SOD detection ranges from 1.5 to 4500 nM with a limit of detection (LOD, 3σ) down to 0.3 nM. The sensor was also successfully applied for label-free and wash-free detection of SOD in human serum samples with a satisfactory recovery.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Hongzhi Gu,Qingwei Huang,Jinli Zhang,Wei Li,Yan Fu
Heparin serves as both reductant and stabilizer for biogenic synthesis of ultrasmall Pt nanoclusters. The surface remaining heparin enhances the affinity of Pt nanoclusters with the substrate 3,3′,5,5′-tetramethylbenzidine, thereby contributing to outstanding peroxidase mimicking activity in near-neutral media. Heparin-reduced Pt nanoclusters exclusively exhibit peroxidase mimicking activities without oxidase-like characteristics. The most efficient Pt nanozyme was reduced at 80 °C by adopting the [K 2 PtCl 4 ]/[heparin] of 1, showing the K m of 165 mM for H 2 O 2 and 0.016 mM for TMB. This developed Pt nanozyme displays a marked superior in both peroxidase-like activity and peroxidase specificity under near-neutral environment over previously reported Pt nanozymes. Based on these two considerable features of heparin-Pt nanozyme, a colorimetric test was developed for directly monitoring glucose at pH 6. This work proposes an efficient way to construct peroxidase mimetics at near-physiological pH without the interference of dissolved oxygen.
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Nanomaterials
·
2025
·Vol. 15
·期 24
·
IF 4.3
Luan Liu,Hongru Liu,Zikang Chen,Genghua Cao,Xiaoyu Wu,Baorui Jia,Xuanhui Qu,Mingli Qin
A rapid solvent-free microwave-assisted strategy was developed to fabricate Pt- and Ni-modified Co(OH)2catalysts for alkaline hydrogen evolution. Among them, Ni-Pt@Co(OH)2, prepared via sequential Ni-first then Pt loading, exhibited the best performance. Structural analyses confirmed uniform Pt dispersion with dominant Pt(111) facets, while ICP-MS showed reduced Pt usage compared to Pt@Co(OH)2. Electrochemical measurements in 1.0 M KOH revealed an overpotential of 71 mV at 10 mA·cm−2, comparable to Pt/C, and a mass activity 4–6.5 times higher across 25–75 mV. EIS demonstrated lower charge-transfer resistance, and stability tests showed negligible degradation after 3000 CV cycles and 11 h continuous operation. The outstanding performance arises from enhanced Pt utilization, abundant conductive sites, and strong Ni-Pt interfacial synergy, highlighting Ni-Pt@Co(OH)2as a promising catalyst for efficient alkaline HER with reduced Pt consumption.
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PubMed
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JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2020
·Vol. 68
·期 1
·114-120
·
IF 1.554
Hui Xie,Yanyan Niu,Ying Deng,Hui Cheng,Chengxiang Ruan,Guangjiu Li,Wei Sun
In this paper, an electrochemical aptamer sensor was proposed for the highly sensitive detection of mercury ion (Hg 2+ ). Carbon nanofiber (CNF) was prepared by electrospinning and high-temperature carbonization, which was used for the loading of platinum nanoparticles (PtNPs) by the hydrothermal method. The Pt@CNF nanocomposite was modified on the surface of carbon ionic liquid electrode (CILE) to obtain Pt@CNF/CILE, which was further decorated by gold nanoparticles (AuNPs) through electrodeposition to get Au/Pt@CNF/CILE. Self-assembling of the thiol-based aptamer was further realized by the formation of Au-S bond to get an electrochemical aptamer sensor (Aptamer/Au/Pt@CNF/CILE). Due to the specific binding of aptamer probe to Hg 2+ with the formation of T-Hg 2+ -T structure, a highly sensitive quantitative detection of Hg 2+ could be achieved by recording the changes of current signal after reacting with Hg 2+ within the concentration range from 1.0 × 10 −15 mol/L to 1.0 × 10 −6 mol/L and the detection limit of 3.33 × 10 −16 mol/L (3σ). Real water samples were successfully analyzed by this method.
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ACTA PHYSICO-CHIMICA SINICA
·
2023
·
IF 10.9
Ruijie Zhu,Leilei Kang,Lin Li,Xiaoli Pan,Hua Wang,Yang Su,Guangyi Li,Hongkui Cheng,Rengui Li,Xiao Yan Liu,Aiqin Wang
Catalytic oxidation is a commonly employed technology in the industry for removing volatile organic compounds (VOCs) due to its exceptional efficiency under mild operating conditions. Although supported Pt-based nano-catalysts are recognized widely as one of the most promising and extensively used industrial catalysts for VOC abatement, their practical application, and development are restricted by their exorbitant cost. Single-atom catalyst (SAC) with maximized metal utilization and exclusive electronic character has been explored extensively in various catalytic reactions. However, Pt SAC is usually deemed to be inactive in hydrocarbon oxidation reactions in thermal catalysis, compared with its nanoparticle counterpart. Here, we demonstrate that the WO 3 -TiO 2 supported Pt SAC (Pt 1 /WO 3 -TiO 2 ) exhibits much higher activities than the corresponding nanoparticle catalyst (Pt NP /WO 3 -TiO 2 ) in photo-thermo catalytic oxidation of C 3 H 8 and C 3 H 6 , which represent different kinds of typical VOCs. A key finding is that the activities of Pt 1 /WO 3 -TiO 2 and Pt NP /WO 3 -TiO 2 can be accelerated in photo-thermo catalytic C 3 H 8 oxidation by overcoming oxygen poisoning. Upon the light irradiation, the apparent active energy ( E a ) of the Pt 1 /WO 3 -TiO 2 and Pt NP /WO 3 -TiO 2 decline from 116 to 60 kJ·mol −1 and from 103 to 30 kJ·mol −1 , respectively, substantiating their effectiveness in photo-thermo catalysis. Notably, a substantially higher reaction rate of 3792 μmol∙g Pt −1 ∙s −1 on the Pt 1 /WO 3 -TiO 2 is achieved, which should be a benchmark for C 3 H 8 oxidation. More intriguingly, photo-thermo catalytic C 3 H 6 oxidation on the Pt NP /WO 3 -TiO 2 is prohibited due to the strong adsorption-induced C 3 H 6 poisoning on the Pt nanoparticles, for which the E a of the Pt NP /WO 3 -TiO 2 catalyst for C 3 H 6 oxidation is maintained at approximately 55 kJ·mol −1 , regardless of the light irradiation. In comparison, the C 3 H 6 poisoning on the Pt 1 /WO 3 -TiO 2 can be mitigated by light illumination, where the E a of the Pt 1 /WO 3 -TiO 2 catalyst for C 3 H 6 oxidation dramatically reduced from 49 to 16 kJ·mol −1 , signifying that the high energy barrier of C 3 H 6 oxidation can be mediated by the light. Profiting from the apt affinity between C 3 H 6 and Pt single atoms, the photogenerated electrons accumulated on the Pt single atoms produce repulsive force towards the electron-rich C 3 H 6 molecules, which is conducive to the C 3 H 6 desorption from the Pt 1 /WO 3 -TiO 2 . Therefore, the Pt 1 /WO 3 -TiO 2 exhibits enhanced activity in photo-thermo catalytic C 3 H 6 oxidation. This study exemplifies that the advantages of SAC are not only saving the consumption of precious metals but also discovering new catalytic reactions on the account of the specific electronic characteristic. Download: Download high-res image (85KB) Download: Download full-size image
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 5
·3329-3338
·
IF 3.5
Qinghu Guo,Pengbin Wang,Xiangyu Meng,Dongxu Li,Zhonghua Yao,Huajun Sun,Hua Hao,Hanxing Liu,Shujun Zhang
Multilayer ceramic actuators find extensive utility in applications requiring precise displacement control or force output, due to their advantages of high precision control, rapid response, low driving voltage, low power consumption, and so on. For practical applications, there is a need for high-performance multilayer ceramic actuators (MLAs) that combine cost-effectiveness, efficiency, and temperature stability. In this work, 1.5 mol%Sm-doped 0.25 Pb(Mg 1/3 Nb 2/3 )O 3 –0.36PbZrO 3 –0.39PbTiO 3 piezoelectric ceramics with PbO–CuO as sintering aid were fabricated. The addition of PbO–CuO significantly reduced the sintering temperature by 300°C, while having minimal impact on the piezoelectric properties. The optimized sintering condition, achieved at a low sintering temperature of 950°C with the introduction of a tiny 0.4 wt% sintering aid, yields impressive piezoelectric strain coefficient d 33 * = 690 pm/V. This substantiates the viability of employing low-cost Ag/Pd (90/10) as inner electrode, which can be co-fired with ceramic layer to fabricate MLA. This innovation enables a remarkable displacement of 1 µm at a low driving voltage of 200 V across a 9-layers piezoelectric actuator, accompanied by high-temperature stability, exhibiting <20% variation over the temperature range of 30–250°C. These results underscore a great potential for high-performance piezoelectric actuators over a broad temperature range.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yunhong Liang,Hao Zhang,Zhaohua Lin,Suqian Ma,Lei Ren,Luquan Ren
As biomimetic actuators that are operable under low voltages, ionic polymer–metal composites (IPMCs) have been proposed as promising candidates in the field of artificial muscles. In this study, a high specific surface area was obtained by directional roughening of a Nafion surface, and high-quality electrodes containing a Pd buffer layer and a Pt layer were deposited on the Nafion matrix via a method of isopropanol-assisted electroless plating, achieving outstanding electromechanical properties. The proposed IPMC exhibits an excellent tip displacement of 36.5 mm and a large blocking force of 2.4 MPa under a low direct current (DC) voltage. Furthermore, the IPMC has an excellent power density (up to 3966 J/m3) and can lift objects that are 20 times its weight, exhibiting great load capacity. More importantly, the imitation of biomimetic actuation behaviors including the opening/closing of petals and wing flapping of bees at a high frequency (21 Hz) has been demonstrated. The fabrication of high-quality Pd/Pt composite electrodes provides significant improvement for IPMC actuators, which is useful for their applications in medical devices and biomimetic robots.
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