JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
Li Sun,Qing Guo,Fan Yang,Kexin Wei,Siyuan Sun,Hongchen Liu,Junpu An,Yang Sun,Yang Guo,Linjie Wang,Yongfeng Li
Rationally designing single-atom catalysts (SACs) with high atomic efficiency and excellent catalytic performance is effective for boosting sodium borohydride (NaBH 4 ) hydrolysis activity. Herein, a series of Pt single-atom catalysts supported on Co-based compounds (Pt/CoP-B, Pt/CoP, Pt/Co 3 O 4 -B) were successfully synthesized via wet impregnation method. Pt M /CoP-B (6.2 wt% Pt loading) exhibited optimal performance at 30 °C: a turnover frequency (TOF) of 1103.26 mol H2 min −1 mol −1 Pt , a hydrogen generation rate (HGR) of 10746 mL min −1 g −1 cat which corresponded to 1.46 times higher than Pt M /Co 3 O 4 -B and 1.33 times higher than Pt M /CoP, outperforming most reported noble metal-based catalysts. It also possessed a low activation energy of 31.05 kJ mol −1 and excellent cycling stability, retaining 95.15 % of initial activity after five consecutive cycles. XPS confirmed strong metal-support interaction between Pt single atoms and CoP-B, which inducing electron transfer from Pt to Co to form electron-deficient Pt and electron-rich Co. DFT calculations revealed that Pt/CoP-B imposes a much lower energy barrier for rate-determining B–H bond cleavage and more effectively promotes H 2 O adsorption. This work offers a new paradigm for creating complementary electronic sites via single-atom-support synergy, opening a novel avenue for advanced NaBH 4 hydrolysis catalysts.
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International Journal of Electrochemical Science
·
2026
·
IF 2.4
Jing Li
Developing cost-effective and highly durable electrocatalysts to overcome the sluggish kinetics of the oxygen reduction reaction (ORR) is critical for the promotion of proton exchange membrane fuel cells (PEMFCs). In this work, a ternary Pd–Pt alloy/WO₃–rGO nanocomposite catalyst was synthesized by a developed two-step chemical reduction method. This strategy enabled the distribution of Pd–Pt alloy nanoparticles very tightly integrated with finely dispersed WOₓ species on conductive rGO support. Structural characterizations confirmed formation of a Pd–Pt alloy phase and strong electronic interactions between the alloy and WOₓ, which resulted in modified surface electronic properties favorable for ORR. Electrochemical characterization revealed that the Pd–Pt–WO₃/rGO catalyst presented the largest electrochemically active surface area (176.29 m² g⁻¹) and superior ORR performance, achieving a mass activity of 83.96 mA mg⁻¹ and a Tafel slope of 70.91 mV dec⁻¹ at 0.9 V vs RHE. The catalyst exhibited superior durability, retaining 94.4% of its initial ECSA after 5000 accelerated cycles, and showed the lowest charge-transfer resistance (0.88 Ω), suggesting its improved conductivity and interfacial charge transfer. The remarkable performance is attributed to the synergistic effects between Pd–Pt alloying, electronic modulation by WOₓ species, and the high conductivity of rGO. These combined features are important for high power density and long stability operability in real PEMFC applications. This study presents a practical pathway for designing high-performance, low-Pt-content catalysts for efficient and durable PEMFCs.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Weidong Zhang,Qizhi Dong,Haozi Lu,Bonian Hu,Yong Xie,Gang Yu
Three-dimensional (3D) network structure nanomaterials (NMs) show excellent catalytic performance due to the larger active surface area. A glucose-directed, surfactant-free and one-step direct chemical co-reduction method for synthesis of Pt-Cu alloy nanowires (NWs) under room temperature was demonstrated in present paper. The Pt-Cu NWs were obtained through the co-reduced of CuCl 2 and H 2 PtCl 6 by sodium borohydride in the presence of glucose, the glucose in which not only acted as one-dimensional (1D) growth-directing agent, also as the stabilizing agent. The average diameter of NWs was about 3.1 nm and NWs showed typical face-centered-cubic (fcc) alloy crystal structure. The influence of Pt/Cu ions ratios in precursor solution on the bimetallic composition of NWs had been studied, and NWs displayed the feature of composition-tuning. The electro-catalytic activity of Pt-Cu alloy NWs for ethylene glycol oxidation reaction (EGOR) in alkaline medium was strongly related on their compositions. The Pt 31 Cu 69 NWs exhibited about 1.8 times higher than that of commercial Pt/C and higher durability. The enhanced catalytic performance of Pt-Cu alloy NWs was mainly attributed to their unique 3D network structure and the synergetic effects between Pt and Cu.
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JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Xiaolong Liu,Li Chen,Tingyu Zhu,Ruliang Ning
Catalytic oxidation of chlorobenzene over noble metal catalysts Pd/TiO 2 , Pt/TiO 2 , Ru/TiO 2 , and Rh/TiO 2 was evaluated, and Ru/TiO 2 contributed the highest catalytic activity and CO 2 selectivity. During the oxidation, polychlorinated benzenes PhCl x (x ≥ 2) were observed, and Ru/TiO 2 showed apparently lower PhCl x concentrations than other three samples. With the improvement of temperature, the maximum concentration appeared in the sequence of dichlorobenzene (PhCl 2 ), trichlorobenzene (PhCl 3 ), tetrachlorobenzene (PhCl 4 ), and pentchlorobenzene (PhCl 5 ), whereas the concentration of hexachlorobenzene (PhCl 6 ) was always low and showed no apparent regularity. Besides, the dioxin-like PCBs (dl-PCBs) were collected and analyzed for Pd/TiO 2 and Ru/TiO 2 . The ∑dl-PCBs produced by Pd/TiO 2 (0.0055 ng WHO-TEQ/Nm 3 ) was about 1.5 times that of Ru/TiO 2 (0.0027 ng WHO-TEQ/Nm 3 ). XPS analyses revealed that Ru/TiO 2 -used and Rh/TiO 2 -used gave the lowest and the highest Cl content of 0.61% and 1.87%. Ru/TiO 2 -used afforded the lowest (Cl ad +Cl or )/Cl value (22.1%) and the highest Cl br /Cl value (77.9%), which might be an important reason for its strongest chlorine removal ability and the lowest yields of polychlorinated by-products, whereas other three catalysts showed similarity in the Cl distributions. Additionally, systematic in-situ FTIR studies were conducted, and a reaction mechanism for the catalytic oxidation of chlorobenzene was proposed.
研究领域:
环境化学
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催化
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污染控制
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材料科学
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化学工程
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.7
Weixiang Chen,Yuxiong Wang,Yaoyu Zhang,Yue Liu,Zhongbiao Wu
Ammonia (NH 3 ) has emerged as a promising zero‑carbon energy source for energy and transportation. However, its utilization leads to the emission of NH 3 , which contributes to PM 2.5 formation and disrupts the global nitrogen cycle. Selective catalytic oxidation (SCO) represents a mainstream technology for NH 3 treatment, yet achieving both sufficient activity and high N 2 selectivity across a broad temperature window remains challenging. Here, a core-shell Pt@Cu-ZSM-5 catalyst was employed for NH 3 catalytic abatement by encapsulating metallic Pt clusters (Pt 0 ) inside the channels of Cu ion-exchanged ZSM-5. The optimal sample achieved a complete NH 3 conversion below 250 °C and maintained over 92% N 2 selectivity from 250 to 500 °C due to the synergism between the Pt Cu dual sites. Mechanistic studies revealed that NH 3 oxidation preferentially occurred on Pt 0 sites with excellent redox capacity to produce N 2 O and NO x at relatively low and high temperatures, respectively. And the presence of Cu ions (Cu δ+ ) could efficiently both inhibit the formation of N 2 O on Pt 0 sites and reduce NO x emission, thereby improving the N 2 selectivity. At relatively low temperatures, NH 3 -solvated Cu + (NH 3 ) 2 could migrate to the adjacent Pt sites and reduce the adsorbed NO* species from NH 3 oxidation, damping the formation of N 2 O. At high temperatures, the NO and NO 2 emitted from Pt 0 sites could be reduced on Cu δ+ sites via a typical selective catalytic reduction. This study provides new insights into the rational design of bifunctional SCO catalysts and offers a comprehensive understanding of the synergistic effects in Pt Cu dual-site systems.
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BIOMATERIALS
·
2026
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IF 12.9
Liang Song,Yongyuan Kang,Pai Peng,Qiaoxuan Wang,Liyin Shen,Jinyue Zhang,Yang Zhu,Changyou Gao
Myocardial infarction (MI) often leads to excessive lactate accumulation, which drives endothelial-to-mesenchymal transition (EndoMT) and subsequent myocardial fibrosis, because the hypoxic environment characteristic of MI diminishes the catalytic efficiency of lactate oxidase (LOx). In this study, platinum (Pt) nanozymes with catalase-like (CAT-like) activity were introduced in this study, which catalyzed the decomposition of hydrogen peroxide (H 2 O 2 ) to generate oxygen (O 2 ), thereby enhancing LOx activity. A strategy involving microgel-anchored LOx-loaded Pt nanozymes (PPtL@MGs) was proposed by loading LOx-loaded Pt nanozymes to microgels, enabling targeted delivery and prolonged retention within the infarcted myocardium. The PPtL@MGs exhibited robust CAT-like activity and effectively enhanced LOx-mediated lactate clearance in vitro , thereby alleviating hypoxia/H 2 O 2 -induced EndoMT in HUVECs. Consequently, it promoted vascular endothelial cadherin (VE-cadherin) expression, suppressed fibroblast-specific protein 1 (FSP1), reduced myocardial fibrosis, and significantly improved cardiac function in vivo . These results demonstrate the potential of this microgel-anchored nanozyme system, which enables cascade-enhanced lactate modulation through O 2 generation and effective lactate clearance, for the effective treatment of MI-induced fibrosis and dysfunction.
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FUEL
·
2026
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IF 7.5
Zhenhua Ji,Zhongqiang Bao,Zihao Wu,Peng Zhang,Rui Yang,Ding Luo,Hao Chen
As the most effective after-treatment technology for NH 3 emission control in road vehicles, Ammonia Slip Catalyst still faces challenges such as insufficient catalytic activity and low selectivity to the reaction product N 2 . Especially, the performance bottleneck in anti-aging greatly limits the commercial application of the catalyst, and there are still research gaps. Based on this, this study aims to reconstruct the structure − activity relationship of the catalyst by directionally constructing TiO 2 with a multi − scale channel core − shell structure as the support based on introducing different contents of Pt and Cu dual active components, and to explore the regulation and improvement mechanism of the catalytic performance including anti − aging property under the multi − dimensional synergistic effect. The results indicate that by enhancing the mass transfer capability of the catalyst with three-dimensional mass transfer channels and the influence of the dual active components, Pt 5 -Cu 1 /TiO 2 with a Pt − Cu content ratio of 5:1 achieves the best catalytic activity and N 2 selectivity. The Density Functional Theory calculation results show that due to the relatively low free energy of the key intermediate HNO, the Pt content plays a dominant role in the formation of N 2 O. Based on the relatively low free energy of the key intermediate NH 2 and the sequential dehydrogenation order, the thermodynamic conditions for the N 2 formation pathway under the catalytic action of Cu are extremely favorable, with relatively small kinetic barriers. Compared with Pt, the NO X formation pathway under the catalytic action of Cu has a smooth energy decrease and is more likely to occur, but it is also affected by the complex competition in the synergistic effect of the dual active components. The 17.69 % content of Pt 4+ in the active components of the catalyst after aging is the main reason for the decline in activity. The thicker shell layer reduces the collapse of the core–shell structure at high temperatures, laying a stable structure–activity relationship foundation for maintaining high activity. The prepared Pt 5 -Cu 1 /TiO 2 still meets the emission regulation limits after aging, showing good anti-aging performance.
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ChemSusChem
·
2026
·Vol. 19
·期 7
·e70598
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IF 5.9
Jiawen Li,Lu Hao,Fangge Cheng,Mansor Hussain,Yuan Fu,Xinyi Ma,Jia Liu
Platinum-based catalysts are the core components for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs). Although platinum catalysts on nitrogen-doped carbon (NC) show promising MOR activity, the coupled variation between Pt and NC during synthesis obscures their individual contributions. Herein, a solid-phase interface reaction (SIR) successfully decouples their interactions, clarifying the role of each component. We define the ripple effect as the long-range electronic modulation induced by Pt–N coordination, which modulates the electronic state of Pt active sites in a long-range manner and thus significantly accelerates MOR reaction kinetics. Based on this, a metal-free catalytic promoter was developed. When combined with commercial 5 wt% Pt/C, the resulting Pt/C@NC-6hr composite exhibits 1.67 times and twice the mass activity of 5 and 20 wt% Pt/C. Furthermore, statistical results indicate that the mass activity derived solely from the Pt on NC is 4.74 times higher than that of the original 5 wt% Pt/C catalyst, demonstrating a remarkably substantial activity enhancement. After 3600 s chronoamperometry at 0.75 V (vs. RHE), it maintains superior current density. This work elucidates the mechanism of microenvironment-enhanced Pt catalysis via the ripple effect and offers a practical strategy for improving commercial Pt/C. Graphical Solid-phase interface reaction triggers Pt nanoparticle migration, while the resulting Pt-N coordination induces a a long-range electronic modulation effect (ripple effect) that significantly accelerates methanol oxidation reaction kinetics.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Yao Chen,Jingliang Wang,Kai Chen,Junxiang Chen,Junheng Huang,Brian Seger,Yingyi Zeng,Yiran Lin,Qingsong Chen,Suqin Ci,Zhenhai Wen
Ordered Pt-InSnGaPb high-entropy intermetallic is developed. • Multi-element coordination creates electron-deficient Pt interfaces. • OH-rich interfaces synergistically accelerate methanol oxidation. • In-situ FTIR and DFT reveal the catalytic mechanism. • Efficient H₂ production and methanol valorization are achieved. Electrochemical methanol oxidation reaction (MOR) represents a promising route for value-added chemical production coupled with on-demand hydrogen production, yet its practical deployment is hindered by the sluggish kinetics and the poisoning susceptibility of conventional Pt-based catalysts. Herein, we demonstrate that a high-entropy intermetallic Pt-InSnGaPb catalyst breaks this limitation by reconfiguring the local catalytic environment. The high-entropy intermetallic framework induces electron-deficient Pt sites and simultaneously creates hydroxyl-rich interfacial domains, establishing a cooperative microenvironment for methanol activation and intermediate oxidation. This dual regulation accelerates charge transfer and enables efficient removal of carbonaceous species. The catalyst exhibits a favorable MOR onset potential of 0.33 V and a high mass activity of 9.96 A mg Pt ⁻ 1 . It also delivers excellent hydrogen evolution performance with an overpotential of 23 mV at 10 mA cm⁻ 2 in acidic media. Mechanistic investigations reveal that the coupled electronic and interfacial effects shift the reaction pathway toward rapid oxidative conversion of intermediates, effectively suppressing CO poisoning. Furthermore, a hybrid acid/alkali methanol-hydrogen fuel cell incorporating this catalyst enables simultaneous hydrogen production, formate generation, and electricity output with stable operation over 250 h. This work provides a general strategy for integrating electronic and interfacial regulation in high-entropy intermetallics for efficient energy conversion. Download: Download high-res image (260KB) Download: Download full-size image Synergistic electron-deficient Pt sites and hydroxyl-rich interfaces in a high-entropy intermetallic catalyst enable kinetically accelerated methanol oxidation for efficient hydrogen and formate co-production.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Yutao Chen,Jihui Xiang,Jinmin Xie,Xinyu Wang,Zeyu Jiang,Yanfei Jian,Mudi Ma,Chi He
SO 2 exhibits opposite effects on C 3 H 8 oxidation over Pd/SiO 2 and Pt/SiO 2 . • O 2 concentration regulates sulfur species evolution and SO 2 tolerance. • Sulfate species block Pd active sites and induce Pd particle sintering over Pd/SiO 2 . • Pt-O-O-S structures on Pt/SiO 2 promote C 3 H 8 adsorption and C-H cleavage. The oxygen concentration in industrial C 3 H 8 -containing exhausts fluctuates significantly (from 0.5 to 18 vol%). However, the intrinsic effect of SO 2 on catalytic C 3 H 8 oxidation under diverse oxygen conditions is greatly overlooked, leading to a discrepancy in the SO 2 tolerance of developed catalyst between laboratory and real-world emission conditions. Herein, the influences of oxygen contents on sulfur species distribution and subsequent sulfur tolerance of typical Pd/SiO 2 and Pt/SiO 2 catalysts during C 3 H 8 oxidation were systematically explored. Experimental results reveal that the oxygen concentration dramatically affects the types and contents of sulfur species over catalysts. For Pd/SiO 2 , SO 2 tends to be converted into sulfate (SO 4 2- ) species to cover the Pd 0 active sites and causes Pd particle sintering, thereby inhibiting the C 3 H 8 adsorption and oxidation. In sharp contrast, sulfite (SO 3 2- ) species form on Pt/SiO 2 , leading to a novel Pt-O-O-S active interface that enriches the adjacent Pt site with electrons, promoting C 3 H 8 adsorption and C-H cleavage and further enhancing catalytic activity. As oxygen concentration decreases, the impact of SO 2 on catalytic performance becomes more pronounced. Under the oxygen-lean conditions, Pd particles sintering caused by SO 2 is the most severe at 1 vol% O 2 , causing an 80 °C temperature increasing in 90% C 3 H 8 conversion; however, the contents of SO 3 2- species and Pt-O-O-S structures on Pt/SiO 2 are elevated, facilitating C 3 H 8 adsorption and activation. Our findings enrich the understanding of SO 2 behavior under different industrial conditions, providing a theoretical basis for the design of SO 2 -tolerant catalyst in diverse application scenarios. Download: Download high-res image (178KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Jiayao Mao,Jiayang Zhao,Jiaxin Wang,Yongting Chen,Yajun Lu,Xiaohui Ren,Xingtao Liu,Feng Ma,Rongsheng Chen,Hongwei Ni
Curved carbon structure can modulate the interaction between the catalyst and the reaction intermediates and enhance the intrinsic activity of the catalyst. However, it remains a significant challenge to prepare curved carbon without surfactants or templates. Herein, we report a facile strategy to prepare curved carbon via mechanical shaking process with polydopamine (PDA) as a precursor. Then, uniformly dispersed Pt nanoparticles (Pt NPs) are planted in situ on the curved carbon structure from free-standing TiO 2 nanosheets (C-rPDA-Pt/TiO 2 NSs) to prepare ultralow Pt loading (13.4 μg cm −2 ) catalysts for acidic hydrogen evolution reaction (HER). The mass activity of C-rPDA-Pt/TiO 2 NSs is tenfold higher than that of the planar carbon supported Pt catalyst (C-sPDA-Pt/TiO 2 NSs) and four times higher than that of 40 % commercial Pt/C catalyst at an applied voltage of −0.1 V. DFT calculations suggest that curved carbon structure effectively adjusts the electronic structure of Pt active sites, thereby achieving optimal Gibbs free energy for hydrogen evolution and enhancing HER performance.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Linsen Li,Xiang Gong,Zhuwei Yang,Riguang Zhang,Zhao Jiang,Tao Fang
As the candidates for large-scale hydrogen storage , liquid organic hydrogen carriers (LOHCs) exhibit evident advantages in hydrogen storage density and convenience of storage and transportation. Among them, NECZ (N-ethylcarbazole)/12H-NECZ (dodecahydro-N-ethylcarbazole) is considered as a typical system with the lower hydrogenation/dehydrogenation temperature. However, the low dehydrogenation efficiency restrict its commercial applications. In this work, the single-layer Ti 3 C 2 T x MXene was employed as the support to load the Pt nanoparticles for the 12H-NECZ dehydrogenation reaction. The effect of transition metals , loading amounts and morphologies of catalysts were analyzed. It was found that the 3 wt% Pt/S–Ti 3 C 2 T x catalyst exhibited the best catalytic performance with 100% conversion, 91.55% selectivity of NECZ and 5.62 wt% hydrogen release amount at 453 K, 101.325 kPa for 7 h. The product distributions and kinetics analysis suggested that the elementary reaction from 4H-NECZ to NECZ was the rate-limiting step. The selectivity of NECZ is sensitive to the dehydrogenation temperature. Combined with the XRD , SEM , HRTEM , XPS , BET and FT-IR results, it could be indicated that the special two-dimension structure of S–Ti 3 C 2 T x and electronic effect between Pt and S–Ti 3 C 2 T x enhanced the dehydrogenation efficiency of 12H-NECZ. The measurements of cyclic dehydrogenation indicated that the Pt/S–Ti 3 C 2 T x catalyst exhibited good stability after 42 h. This work brought a new strategy for the design of efficient catalysts using two-dimensional materials in the applications of the liquid organic storage hydrogen technology .
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