Journal of Materials Chemistry A
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2026
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IF 9.2
Fangfang Yang,Xiangxing Lv,Zixuan Zhang,Longji Cui,Changsheng Cao,Yaqiang Li,Zailai Xie,Xuefei Zhang
Platinum (Pt)-based materials continue to serve as the benchmark electrocatalysts for the hydrogen evolution reaction (HER), yet their large-scale application is limited by the inherent scarcity and prohibitive cost of platinum. Herein, we develop a Pt-based single atom catalyst comprising Pt atoms anchored in N-doped carbon (NC) encapsulated onto molybdenum carbide (Mo2C) microspheres. Structural analyses reveal an ultra-low Pt loading of 0.156 wt%, characterized by Pt–N4 configurations. Kinetic measurements show that the optimized Pt-NC@Mo2C exhibits exceptional HER performance with an overpotential of 37 mV at 10 mA cm−2 and a Tafel slope of 40 mV dec−1 in acidic solution, outperforming the commercial Pt/C (20 wt%) and most reported Pt-based catalysts. Experimental and theoretical studies demonstrated that the NC layer bridges the Pt atom and Mo2C, which not only stabilizes atomic Pt active sites but also modulates their electronic structures through electron transfer from Pt to Mo2C. This unique composite nanostructure optimizes and facilitates the adsorption of H* intermediates on the Pt-NC@Mo2C, thereby enhancing its HER performance.
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Nature Communications
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2026
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IF 18.1
Mu Zhangyan,Ma Zhibin,Zhao Weiyi,Dai Luhan,Xu Dan,Ran Pan,Zhang Panke,Wu Xuejun,Ge Junjie,Ding Mengning
Electrocatalytic alcohol oxidation is pivotal for renewable energy conversion, yet its widespread application is hindered by generally low efficiency, necessitating the development of advanced catalytic systems with boosted electro-oxidation kinetics. In an alkaline electrolyte, the effect of alkali metal cations has been identified as a key impacting factor on the alcohol oxidation activity, but the underlying mechanistic interactions remains insufficiently explored. Here we elucidate the fundamental cation effects on hydroxyl (OH ads ) adsorption and subsequent surface bi-molecular kinetics in Pt (and alloys)-catalyzed alcohol electro-oxidations through combined electrochemical voltammetry, in situ surface enhanced infrared absorption spectroscopy (SEIRAS) and in situ electrical transport spectroscopy (ETS). Systematic evaluations reveal that alkali metal cations regulate the micro-electro-kinetics by modulating the surface coverage of OH ads , which acts bi-functionally as both reactant species and spectator in alcohol oxidations. A matching adsorption kinetics of OH ads and alcohol is key towards the optimal alcohol oxidation activity, providing valuable insights into the cation-mediated alloy catalyst systems and high-concentration conditions in alcohol fuel cells.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2026
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IF 8.3
Wei Wei,Jinxiao Liu,Xinying Lu,Xiaohong Xia,Yuwen Bao,Cong Ye,Xiaolin Wu,Yun Gao
The development of highly sensitive hydrogen sensors with low operating temperatures is crucial for the safe utilization of hydrogen. Practical operating environments demand not only high sensitivity but also immunity to both humidity fluctuations and interference from other reducing gases, especially CO. In this work, hierarchical architectures comprising WO 3 nanosheets (NS) assembled on WO 3 microspheres (M) is deliberately designed and successfully synthesized via a two-step solvothermal method. Subsequently, Pt is functionally loaded onto the surfaces, adopting various morphologies and serving multiple functions for H 2 sensing. Notably, the optimal operating temperature is reduced to 50 °C while achieving exceptional sensing characteristics: an ultrahigh response of 8372.2 toward 1200 H 2 , a swift 2 s response time, outstanding selectivity with immunity to CO interference, excellent humidity immunity, and robust long-term stability. The mechanism underlying the superior sensing capability is systematically investigated to elucidate the performance enhancement. This work presents a pioneering approach to constructing high-performance, anti-interference gas sensors through hierarchical architecture engineering, offering new insights into the design and application of advanced sensing materials.
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APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Tianran Chen,Renxu Zhang,Wei Feng,Min Zhang,Xubin Li,Fengqi Ji,Xiangdongfang Liu,Tao Wang,Jiayin Li,Lin Zhang,Guanghui Min,Guoqing Zhao
Flexible and heatable electrochromic smart windows. • Dense and dendrite-suppressed Zn electrodeposition during repeated plating/stripping cycles. • Ultrafast optical switching behavior driven by low operating voltage. • Long-term cycling stability exceeding 1000 coloration/bleaching cycles. Reversible Zn electrodeposition-based electrochromic smart windows are attractive owing to their simple configuration, fast optical response, and low energy consumption. However, uncontrolled dendritic growth of Zn during repeated electrodeposition severely limits the achievable coloring efficiency and long-term stability of such devices, hindering their commercial adoption. In this work, a Pt interfacial layer is introduced onto a flexible ZnO/Ag/ZnO/PET working electrode, effectively suppressing Zn dendritic growth and enabling the development of a flexible electrochromic device with enhanced performance and stability. Pt-induced abundant and uniform Zn nucleation leads to denser and less dendritic Zn electrodeposition, allowing a wide and reversible visible-light transmittance modulation from 6.2% to 60.5%, along with rapid coloring and bleaching response times of less than 6 s under ultra-low operating voltages. The device further exhibits stable electrochromic performance over 1000 cycles, excellent mechanical flexibility, and effective Joule heating capability for defrosting/defogging. This work provides an effective interfacial strategy for regulating repeated Zn electrodeposition and advances the development of flexible electrochromic smart windows for energy-efficient buildings and vehicles. A Pt interfacial layer is designed to suppress the dendritic growth of Zn on the working electrode of reversible metal electrodeposition devices through the enhancement of Zn nucleation density, enabling the regulation of repeated Zn plating/stripping and the development of flexible, heatable electrochromic smart window with remarkable and ultrafast optical modulation. Download: Download high-res image (44KB) Download: Download full-size image
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Jingfeng Cao,Xudong Leng,Jieyu Yang,Xuekun Jin,Fengjuan Chen,Haiming Duan,Biaobing Cao
The PtFeNC-S catalyst was obtained assisted bysodium thiosulfate. • PtFeNC-S exhibits excellent performance higher than that of Commercial PtC. • It can be attributed to the synergistic effects of FeN x sites, and C-S-C. • The catalytic mechanism is further clarified by DFT calculations. Reducing Pt loading is a promising strategy to scale up fuel cells and water electrolysis by optimizing catalyst design and active site distribution, achieving high efficiency with minimal precious metal. A Pt-loaded cathode catalyst (PtFeNC-S) was synthesized, in which Pt nanoparticles were uniformly distributed on the FeNC-S substrate using sodium thiosulfate, and it exhibited excellent oxygen reduction reaction (ORR) performance. TEM analysis reveals uniform dispersion of Pt nanoparticles (Pt NPs) with sizes of 2–5 nm, while XPS confirms the retention of FeN x active sites. The optimized PtFeNC-S catalyst exhibits a half-wave potential (E 1/2 ) of 0.86 V, 20 mV more positive than that of Commercial PtC (0.84 V), together with a kinetic current density of 11.95 mA cm −2 at 0.85 V and a Pt mass activity of 203.64 mA mg Pt −1 , substantially higher than that of Commercial PtC (3.92 mA cm −2 and 62.19 mA mg Pt −1 , respectively). Moreover, PtFeNC-S retains 88.8% of its initial current after 24 h of continuous operation, compared with 81.7% for Commercial PtC, and exhibits only a 13 mV decrease in E 1/2 after 10,000 accelerated durability cycles, lower than the 18 mV decrease observed for Commercial PtC. The high performance arose from both the uniform dispersion of Pt nanoparticles and the presence of C-S-C sites, along with FeN x sites that added further active centers for ORR. Density functional theory (DFT) calculations indicate that the downshift of d-band center for Pt was induced by synergistic interaction of Pt and FeN x sites, and S doping, thereby promoting OH desorption and augmenting ORR performance. The study presents a straightforward approach for synthesizing Pt catalysts that exhibit promising capabilities. Download: Download high-res image (251KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
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2026
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IF 7.6
Sun Ruize,Liu Xiaonan,Chen Jingge,Chen Zhangguo,Zhou Jicheng,Xu Wentao
Propane direct dehydrogenation (PDH) is an important way for the high-value utilization of propane (C 3 H 8 ). However, the conventional thermal catalytic reaction process is limited by the thermodynamic equilibrium of the strong endothermic reaction, and usually needs to be operated at high temperature, which makes it difficult to balance high conversion and high selectivity. In this study, a new method of microwave catalytic dehydrogenation of C 3 H 8 to propylene (C 3 H 6 ) at low temperature and high efficiency was proposed, and Pt-ZnO/S-1 + SiC microwave catalyst was developed. It was found that microwave significantly improved the conversion and selectivity of the catalyst, and the reaction was carried out efficiently at lower temperatures. Under low temperature microwave catalysis (MCRM) at 450 ° C, the conversion of C 3 H 8 was as high as 46.4%, and the selectivity of C 3 H 6 was as high as 99.3%, which were significantly better than 18.4% conversion and 95.1% selectivity under conventional thermal catalysis (CRM). Further study shows that the microwave action reduces the apparent activation energy of the catalyst from 75.5 kJ·mol −1 under CRM to 48.7 kJ·mol −1 under MCRM. This study provides a new strategy for the low-temperature and efficient conversion of low-carbon alkanes such as C 3 H 8 and provides a new idea for the application of microwave catalytic technology in other catalytic reactions.
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APPLIED CATALYSIS A-GENERAL
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2025
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IF 4.8
Zhenhua Ji,Shijing Xie,Hao Chen,Peng Zhang,Ding Luo,Yixuan Chai,Zhuo Wang
Aiming at the key issues of current vehicle Ammonia Slip Catalyst (ASC) catalysts, such as poor low-temperature activity, high noble metal content, and narrow operating window, this study aims to construct multi-scale pore structures in Al 2 O 3 supports of supported catalysts to regulate selective catalytic oxidation of NH 3 (NH 3 -SCO) across broad temperature ranges and space velocities by improving convective diffusion, conduction, migration, and adsorption processes within catalyst voids. Characterization results show that a series of catalyst supports with different pore structures was successfully prepared using different templates. Pt was loaded using an optimized supported catalyst preparation method. Meanwhile, the coating amount of the prepared catalyst on cordierite monolith substrates was significantly reduced, and NH 3 -SCO performance tests were conducted. The results indicate that single mesoporous structures have limited regulation on the intrinsic activity of catalysts, while macroporous structures enhance the influence of desorption and void diffusion of gas-phase reactants and products on catalytic reactions. In the presence of macroporous structures, the promotional effect of mesopores on NH 3 -SCO reactions is enhanced. Among all catalysts, hierarchical porous catalysts with larger pore diameters and better interconnected pore structures exhibit NH₃ conversion rates exceeding 99 % across the full temperature range of 200℃ - 500℃, with NH 3 concentrations below the regulatory limit of 10 ppm throughout the operating window. Macroporous structures and their pore diameters play a dominant role in regulating NH 3 -SCO reactions, particularly with stronger regulation at low temperatures. Increasing space velocity enhances the diffusion rate of NH 3 gas molecules while amplifying the influence of pore structure regulation on catalysts. Notably, compared with traditional Pt/Al 2 O 3 , pore structure regulation does not significantly increase the generation of N 2 O while effectively enhancing the catalytic activity of the ASC catalyst.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Qian Wang,Hanyu Shi,Sihan Fang,Chengchen Wang,Jiming Zeng,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic technology, as an environmentally friendly and sustainable approach for hydrogen production, demonstrates significant market potential，where bimetallic single-atom catalysts (SACs) demonstrate superior performance compared to monometallic counterparts through heteronuclear synergistic effects, establishing them as a critical research focus in modern catalytic science. In this investigation, TiO₂ nanosheets were employed as catalytic supports, with oxygen vacancy defects being strategically introduced via H₂-Ar atmosphere thermal reduction to immobilize both monometallic Pt and bimetallic Pt-Pd single atoms. The hydrogen evolution rates were quantified as 1956.45 μmol·h⁻¹ ·g cat ⁻¹ for Pt-loaded catalysts and 3522.65 μmol·h⁻¹ ·g cat ⁻¹ for Pt-Pd-loaded systems, corresponding to 72.3-fold and 130.2-fold improvements relative to unmodified TiO₂. This performance enhancement is attributed to optimized charge carrier separation facilitated by oxygen vacancies and the complementary electronic interactions between Pt and Pd atoms in bimetallic configurations, which collectively promote efficient surface reactions and hydrogen generation kinetics. The remarkable advantages of bimetallic systems in photocatalytic hydrogen evolution are demonstrated through these findings, with Density Functional Theory (DFT) revealing that Pd incorporation not only modulates charge density and band structure through its role as a cocatalyst but also actively participates in the hydrogen evolution reaction as catalytic sites. The formation of Ti-Pt-Ti and Ti-Pd-Ti configurations is observed to effectively reduce reaction energy barriers while suppressing competitive adsorption at isolated metal sites, resulting in enhanced catalytic performance. A strategy for designing efficient photocatalysts is established through this work, supported by mechanistic insights into energy barrier reduction and adsorption regulation, which provides critical theoretical foundations with both scientific and practical significance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
Shuyue Xie,Yanyan Song,Ruxangul Jamal,Tursun Abdiryim
The development of platinum (Pt)-based electrocatalysts with optimized interfacial structures is crucial to improve the efficiency of direct methanol fuel cells (DMFCs). Here, a Pt-based methanol oxidation reaction (MOR) catalyst (Pt/PProDOT/Fe-NCNT) is constructed by anchoring Pt to poly(3,4-propylenedioxythiophene) (PProDOT) modified and Fe/N co-doped carbon nanotubes (Fe-NCNT) via interfacial engineering. The mass activity (MA) of the Pt/PProDOT/Fe-NCNT catalyst (1258.9 mA mg −1 ) was higher than that of the Pt/Fe-NCNT catalyst (661.5 mA mg −1 ), suggesting that the introduction of PProDOT over Fe-NCNT may enhance the catalytic activity and accelerate the reaction kinetics. The MA value of the Pt/PProDOT/Fe-NCNT catalyst was also superior to that of the commercial Pt/C (282.8 mA mg −1 ) catalyst and many other reported Pt-based catalysts. Experiments and material characterization show that the synthesized Pt/PProDOT/Fe-NCNT catalyst has a unique bamboo-like hollow structure and is cross-linked to form a three-dimensional network. Such a structure can lead to more chemically active sites by the electronegative N atoms in Fe-NCNT, while stabilizing the Pt nanoparticles by the S atoms in PProDOT. Furthermore, the stacking of π-π rings between PProDOT and Fe-NCNT facilitates electron conduction, thereby enhancing catalytic activity and MOR efficiency. Results from this study offer a possible new design of Pt-based catalyst with polymer-modified carbon carriers.
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高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
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IF 16.6
Chen Jianjun,Xiong Shangchao,Liu Haiyan,Shi Jianqiang,Mi Jinxing,Liu Hao,Gong Zhengjun,Oliviero Laetitia,Maugé Françoise,Li Junhua
The spillover of oxygen species is fundamentally important in redox reactions, but the spillover mechanism has been less understood compared to that of hydrogen spillover. Herein Sn is doped into TiO 2 to activate low-temperature (<100 °C) reverse oxygen spillover in Pt/TiO 2 catalyst, leading to CO oxidation activity much higher than that of most oxide-supported Pt catalysts. A combination of near-ambient-pressure X-ray photoelectron spectroscopy, in situ Raman/Infrared spectroscopies, and ab initio molecular dynamics simulations reveal that the reverse oxygen spillover is triggered by CO adsorption at Pt 2+ sites, followed by bond cleavage of Ti-O-Sn moieties nearby and the appearance of Pt 4+ species. The O in the catalytically indispensable Pt-O species is energetically more favourable to be originated from Ti-O-Sn. This work clearly depicts the interfacial chemistry of reverse oxygen spillover that is triggered by CO adsorption, and the understanding is helpful for the design of platinum/titania catalysts suitable for reactions of various reactants.
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CHEMOSPHERE
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2021
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IF 7.086
Ziyang Xu,Shengpeng Mo,Yanxia Li,Yuchen Zhang,Junliang Wu,Mingli Fu,Xiaojun Niu,Yun Hu,Daiqi Ye
The problem of deep oxidation of low concentrations of VOCs in industrial tail gas is exceptionally urgent. The preparation of VOCs ozonation catalyst with a high mineralization rate is still a challenge. In this paper, manganese oxide carriers with different morphologies were synthesized by simple methods and used to catalyze ozone mineralization of toluene after loading Pt nanoparticles efficiently. The conversion of toluene over Pt/MnO x -T catalyst was more than 98 % at ambient temperature, and the mineralization rate of toluene was close to 100 % at 70 °C. Through a variety of characterization methods, the strong metal-support interaction (SMSI) between Pt nanoparticles and carriers was successfully constructed. It was found that SMSI successfully optimized the surface oxygen species and oxygen migration ability of the catalyst, and then realized the high degree of mineralization of toluene at low temperature. This paper guides the subsequent development of Pt–Mn catalysts for catalytic organic pollutants ozonation with high activity.
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高影响因子
Materials Today Nano
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2022
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IF 13.364
R. Sun,Z. Xia,Z. Zhang,X. Xu,F. Jing,S. Wang,G. Sun
Water management within the electrode architecture restrains the performance and dynamic stability of polymer electrolyte fuel cells (PEFCs), especially with the reduction of precious electrocatalyst loading. Local mass transport at the catalyst-ionomer interphase crucially depends on the water uptake of the ionomer layers, which could be optimized via balancing electrode flooding and draining during the dynamic change of current and humidification . Herein this work, supportless platinum-ionomer hybrid porous nanofibrous are constructed via a new method combined with electrospinning and electrochemical etching . Ascribing to the hierarchical architecture of continuous platinum-ionomer nano-dendrites and fibrous networks, only 17.8% maximum power density deviation under varied cathode humidity is observed in the porous nanofibrous cathode, compared to 160% deviation for traditional one. Such self-regulated water management within this electrode is achieved due to stable interfacial layer constructed under working circumstance. This presented work could provide alternative thoughts on mass transport issues affected by nanoscale interfacial structures and demonstrate an efficient design of electrode architecture with better performance and dynamic stability for polymer electrolyte fuel cells .
研究领域:
能源材料
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电化学
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纳米材料
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燃料电池
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可持续能源
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危险品化学品经营许可证（带存储）