CHINESE JOURNAL OF CATALYSIS
·
2017
·
IF 2.813
Honggen Peng,Jiawei Ying,Jingyan Zhang,Xianhua Zhang,Cheng Peng,Cheng Rao,Wenming Liu,Ning Zhang,Xiang Wang
Catalytic oxidation of formaldehyde (HCHO) is the most efficient way to purify indoor air of HCHO pollutant. This work investigated rare earth La-doped Pt/TiO 2 for low concentration HCHO oxidation at room temperature . La-doped Pt/TiO 2 had a dramatically promoted catalytic performance for HCHO oxidation. The reasons for the La promotion effect were investigated by N 2 adsorption, X-ray diffraction, CO chemisorption , X-ray photoelectron spectroscopy, transmission electron microscopy (TEM) and high-angle annular dark field scanning TEM . The Pt nanoparticle size was reduced to 1.7 nm from 2.2 nm after modification by La, which led to higher Pt dispersion, more exposed active sites and enhanced metal-support interaction. Thus a superior activity for indoor low concentration HCHO oxidation was obtained. Moreover, the La-doped TiO 2 can be wash-coated on a cordierite monolith so that very low amounts of Pt (0.01 wt%) can be used. The catalyst was evaluated in a simulated indoor HCHO elimination environment and displayed high purifying efficiency and stability. It can be potentially used as a commercial catalyst for indoor HCHO elimination.
✓ 已验证
DOI
高影响因子
Nano Research
·
2021
·Vol. 14
·期 12
·4841-4847
·
IF 8.897
Song Jiaojiao,Yang Yixuan,Liu Shoujie,Li Lei,Yu Nan,Fan Yuteng,Chen Zhiming,Kuai Long,Geng Baoyou
The source of activity of metal/metal oxides has always been an interesting, important but highly challenging research topic in heterogeneous catalysis. In CO oxidation reaction, this work clarifies dispersion and support dictated activities of Pt including single-atom (Pt 1 ), 2.8 nm (Pt NP-S ) and 36 nm (Pt NP-L ) Pt supported on both reducible TiO 2 and “inert” Al 2 O 3 supports. The X-ray absorption fine structure (XAFS) shows that chemical state of Pt is affected by both dispersion and support: Pt 1 presents fully oxidized state in both Pt 1 /TiO 2 and Pt 1 /Al 2 O 3 ; Pt NP-S in Pt NP-S /TiO 2 appear nearly oxidized state while about half of Pt is metallic state in Pt NP-S /Al 2 O 3 ; Pt NP-L in both Pt NP-L /TiO 2 and Pt NP-L /Al 2 O 3 exhibit metallic state. All the Pt species supported on TiO 2 present much lower apparent activation barriers ( E app ) than that on Al 2 O 3 . Moreover, Pt 1 /TiO 2 possesses dozen times of efficiency than Pt NP-S /TiO 2 although they have similar E app values. A truth is finally made clear that a reducible metal oxide with low oxygen vacancy formation energy is critical to endow Pt/metal oxide a high activity and the single-atom dispersion of Pt is the way to maximize the active sites of Pt/metal oxide.
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Jianbing Wu,Ge Hua,Jihua Liu,Yifan Zhao,Hong Ma,Yongzhao Wang,Zhiwei Wu
Pt-based catalysts confined within silicalite-1 (S-1) zeolites offer promising selectivity for propane dehydrogenation (PDH), but their long-term stability remains limited due to metal sintering and coke deposition. In this study, a series of Pt@S-1 catalysts with systematically varied Ga contents were synthesized via ligand-assisted hydrothermal encapsulation of Pt and in situ Ga incorporation. Structural characterizations reveal that Ga is introduced as both framework (Ga F ) and extra-framework (Ga EF ) species. Under H 2 treatment, Ga EF partially transforms into either PtGa alloy nanoparticles and Ga δ+ species, leading to the formation of Pt-Ga δ+ -H ensembles within the zeolite channels. These Ga-related species were associated with improved Pt dispersion, suppressed sintering, and reduced coke formation. The optimized catalyst, 1Pt24Ga@S-1, exhibited the most favorable PDH performance, achieving an initial propane conversion of 38.2 % and a propylene selectivity of 94.8 %. Under H 2 co-feeding (C 3 H 8 :H 2 = 1:1), it achieved a propylene production rate of 7.97 mol C3H6 ·g Pt -1 ·h -1 . The deactivation constant decreased from 0.247 h -1 for the undoped catalyst to 0.086 h -1 with Ga incorporation, and further declined to 0.008 h -1 under H 2 , reflecting improved stability. These results suggest that Ga incorporation contributes to both structural and electronic modifications of confined Pt species, offering insights into the design of more stable and selective PDH catalysts.
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2026
·
IF 11.8
Xin Li,Xinyu Zhu,Shaorou Ke,Shitao Min,Shujie Yang,Wenhao Peng,Yanghong Li,Zhaohui Huang,Minghao Fang,Fengmei Wang,Xin Min
The accelerating transition to clean hydrogen energy demands highly efficient and stable platinum-based electrocatalyst for the hydrogen evolution reaction (HER). However, achieving uniform low-Pt-loading catalysts remains challenging due to weak interfacial interactions and inadequate dispersion control. Herein, we developed a synergistic interfacial coordination engineering strategy through integrating freeze-drying with transient non-equilibrium Joule heating, enabling the ultrafast synthesis of uniformly dispersed 1.84 ± 0.58 nm Pt nanoclusters on the reduced graphene oxide (i.e., Pt@rGO-T) within 20 s. Structural characterizations and theoretical calculations reveal that oxygen anchoring sites and chlorine coordination cooperatively strengthen the electron–metal–support interaction and modulate the Pt d-band center, thereby tuning the H* adsorption free energy toward a more favorable, near-thermoneutral range. Notably, this interfacial configuration may promote interfacial modulation and possible H* migration between Pt nanoclusters and the rGO support. As a result, the Pt@rGO-T delivers low overpotentials of 29.6 and 73.0 mV at 10 and 100 mA cm −2 , respectively, along with a high mass activity of 6.23 A mg −1 and excellent durability over 200 h. This transient thermal engineering strategy offers a generalizable pathway for the rational design of interfaces and coordination environments in advanced noble metal-based electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jincheng Luo,Zhigang Yi,Jialin Zheng,Song Xie,Dewei Liu,Zhu Zu,Yuxiang Liu,Pansong Li,Yusen Xiao,Kang Liu,Zhiqiang Sun,Xing Peng,Min Liu
CO and steam drive the self-optimization of Pt/θ-Al 2 O 3 during SMR. • Surface Pt–CO species facilitate Pt redistribution into dispersed sites. • The dispersed Pt species enhance methane adsorption and activation under working conditions. • 0.1 wt% Pt gives >93% CH 4 conversion with near-unity H 2 selectivity at 700 °C. • Ce promotion suppresses long-term Pt sintering while preserving high activity. Maximizing noble-metal utilization under harsh reaction conditions remains a fundamental challenge in heterogeneous catalysis, as high temperatures typically drive irreversible metal sintering. Here, we report a reaction-atmosphere-driven dynamic dispersion mechanism that enables the in situ self-optimization of Pt/Al 2 O 3 catalysts during steam methane reforming (SMR). We show that the coexistence of steam and in situ generated CO promotes the progressive restructuring of Pt species toward highly dispersed, low-coordination metallic sites during activation. Spectroscopic analyses suggest that CO-containing intermediates may facilitate Pt restructuring through the formation of surface Pt–CO species, while steam induces the formation of surface hydroxyl groups on Al 2 O 3 that may help stabilize dispersed Pt species. This atmosphere-assisted restructuring process increases the number of accessible Pt surface sites during activation and improves Pt utilization under SMR conditions. As a result, an ultralow-loading Pt catalyst (0.1 wt%) achieves >93% CH 4 conversion with near-unity H 2 selectivity at 700 °C, together with an apparent TOF nearly an order of magnitude higher than that of higher-loading counterparts. Furthermore, moderate strengthening of metal-support interactions via Ce modification effectively suppresses long-term sintering without compromising activity. This work introduces a dynamic dispersion paradigm in which the reaction atmosphere actively governs catalyst structure under operating conditions, providing a general strategy for designing self-adaptive catalysts with maximized noble-metal efficiency in high-temperature reactions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 28
·22312-22323
·
IF 6.7
Peng Huajie,Gao Di,Xiao Zhengyue,Yue Zhixiang,Xu Peng,Qiu Ping
Compared with natural-enzyme-based detection strategies,
nanozymes
offer notable advantages in stability, environmental tolerance, and
cost-effectiveness. In this study, we designed and synthesized a Pt@Fe-MIL-88
composite with both oxidase (OXD)-like activity and intrinsic fluorescence.
The material efficiently catalyzes 3,3 ′ ,5,5 ′ -tetramethylbenzidine
(TMB) oxidation, generating a color change while quenching its fluorescence.
Glyphosate (Gly) specifically inhibits the OXD-like activity of Pt@Fe-MIL-88,
reducing oxTMB production and thereby alleviating fluorescence quenching,
enabling dual colorimetric and fluorometric signal readout. The inhibition
mechanism was elucidated through FTIR, XRD, XPS characterization,
molecular dynamics simulations, and DFT calculations. Accordingly,
a natural-enzyme-free, colorimetric-fluorometric dual-mode sensing
platform for Gly was established. The platform exhibits high sensitivity,
excellent selectivity, and strong anti-interference capability, with
accuracy and reliability validated by spike recovery tests in real
samples. This work presents a new strategy for developing stable,
rapid, and low-cost multimodal detection methods for pesticide residues.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 12
·2042
·
IF 5.1
Zhen Liu,Guoan Xi,Yin Hu,Wei Chen,Lingling Wang,Xuanye Chen,Fen Zhang
The selective hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN) is of great importance for the production of dyes, pesticides, and pharmaceuticals, but it is often plagued by the undesired hydrodechlorination side reaction. In this work, we report a PtNi bimetallic catalyst supported on nano-sized LTL zeolite (PtNi/Nano-HL) for the selective hydrogenation of p-chloronitrobenzene under mild conditions. The catalyst was systematically characterized by X-ray diffraction (XRD), nitrogen sorption (N2sorption), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and ammonia temperature-programmed desorption (NH3-TPD). The results reveal abundant oxygen vacancies (RIR = 0.73) and an optimized distribution of medium–strong acid sites on the catalyst surface, as well as electronic interaction between Pt and Ni, which collectively enhance the catalytic performance. Remarkably, the PtNi/Nano-HL catalyst achieves 100% conversion and over 99% selectivity for p-chloroaniline under ambient conditions (30 °C, 0.1 MPa H2) using ethanol as a solvent. Even after 24 recycling runs, it retains 100% conversion and >93% selectivity, demonstrating excellent stability. Moreover, the catalyst requires an extremely low Pt loading (only 0.11 wt%) and exhibits good substrate universality for various substituted nitroarenes. This work provides a promising strategy for designing high-performance bimetallic catalysts on nano-zeolite supports for the selective hydrogenation of halonitrobenzenes.
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Yong Zhou,Jiamei Liu,Bin Yang,Wei Zhu,Bing Li,Xiaoyang Liu
Developing broad-pH hydrogen evolution reaction (HER) catalysts is crucial for green hydrogen production. Herein, Pt-MoS 2 heterostructure catalysts supported on nitrogen-doped hollow mesoporous carbon spheres (NHMCS) were synthesized via a two-step microwave-assisted solvothermal strategy. The catalyst exhibits outstanding HER activity in acidic, alkaline, and neutral electrolytes, especially in neutral conditions. Pt-MoS 2 /NHMCS-15 mg delivers a current density of 10 mA cm −2 at an ultralow overpotential of only 5.5 mV in 1.0 m PBS. Negligible performance degradation occurs after 100,000 cyclic voltammetry (CV) cycles and 120 h chronoamperometric operation, showing outstanding stability. X-ray absorption fine structures (XAFS), in situ Raman spectroscopy combined with density functional theory (DFT) calculation, elucidate the origin of the enhanced HER activity in neutral media. Strong metal-support interactions (SMSI) at the Pt-MoS 2 interface significantly lower the dissociation energy barrier of the P─OH bond in H 2 PO 4 – , thereby facilitating proton release. Simultaneously, neutral conditions yield higher hydrogen coverage on Pt sites than acidic or alkaline media. These findings provide fundamental insights into the intrinsic mechanism governing the broad-pH HER performance of Pt-MoS 2 /NHMCS-15 mg, particularly in neutral electrolytes, and offer valuable theoretical and experimental guidance for the rational design of efficient and cost-effective HER catalysts, advancing the practical implementation of electrocatalytic hydrogen evolution technologies.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Tingquan Zhang,Yang Han,Fengqin Zhang,Chang Yang,Yuan Hu,Qingmei Wang
Designed ordered Pt 1 Co 1 nanocrystals anchored on N-doped carbon with optimized Pt/Co ratio for bifunctional ORR and MOR. • Achieved superior ORR performance: mass activity of 0.734 mA/μg Pt and specific activity of 1.725 mA/cm 2 , outperforming Pt/C by 4.2 and 6.2 times, respectively. • Revealed the synergy of ordered structure and metal-support interaction (SMSI) for electronic modulation (downshifted Pt d-band) and geometric stabilization. • Provided a universal design principle for high-performance Pt-based bifunctional electrocatalysts via structural ordering and support engineering. The practical deployment of fuel cells (FCs) faces significant obstacles stemming from the surface poisoning of electrocatalysts by carbonaceous intermediates (primarily CO) and the intrinsically sluggish reaction kinetics of the oxygen reduction reaction (ORR) at the cathode. Herein, we report the synthesis of ordered PtCo nanocrystals anchored on a nitrogen-doped carbon (NC) support with precisely controlled atomic ratios. The incorporation of Co atoms into the Pt lattice induces a downshift of the Pt d -band center, substantially weakening the adsorption strength of CO and other oxygen intermediates on the catalyst surface. In the CO stripping experiment, the CO oxidation peak potential of Pt 1 Co 1 NCs was observed at 0.587 V, which is 137 mV lower than that of 20% commercial Pt/C (0.724 V). This significant negative shift directly confirms the enhanced CO tolerance of the Pt₁Co₁ NCs catalyst. Furthermore, the Pt 1 Co 1 NCs catalyst demonstrated significantly enhanced bifunctional activity. Specifically, it delivered mass activities (MA) of 0.734 mA/μg Pt for the ORR and 0.932 mA/μg Pt for the MOR, outperforming commercial Pt/C by factors of 4.2 and 3.7, respectively. Download: Download high-res image (324KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2026
·Vol. 130
·期 31
·10940-10951
·
IF 3.4
Li Qing,Yang Yuke,Li Huajing,Yang Yiwen,Ma Siyu,Su Qiuxing,Shi Yonghong,Li Yuangang
The
synergistic coupling of photocatalytic hydrogen production
with high-value-added organic conversion provides a new research direction
for the efficient use of solar energy and green chemical synthesis.
However, key challenges remain in the same catalytic system, such
as severe carrier recombination and difficulty in precisely controlling
the interfacial reaction pathways. To address these issues, we construct
CdS/TiO 2 heterojunction photocatalysts with Pt species
introduced by ion exchange and photodeposition. As a result, the Cd(Pt)S/TiO 2 –Pt composite photocatalyst is successfully prepared.
Under visible light irradiation, the catalyst achieves highly selective
conversion of 4-pyridinemethanol to the C–C coupling product
1, 2-di(4-pyridyl)-1,2-ethanediol, with a selectivity of 89.22%. Under
optimized reaction conditions, the maximum H 2 production
rate of the catalyst reaches 4.66 mmol·g –1 ·h –1 . Mechanistic studies show that the photogenerated
holes enriched on the surface of Cd(Pt)S drive the sp 3 C–H
dehydrogenation of 4-pyridinemethanol to form •CH(OH)C 5 H 4 N radicals, which then undergo radical coupling
to form new C–C bonds. Meanwhile, the photogenerated electrons
transfer through TiO 2 to the Pt active sites to participate
in hydrogen evolution. This study provides new insights into regulating
the selective conversion of radicals via interfacial electronic engineering
and designing photocatalytic coupled reaction systems.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Leibing Chen,Kairui Li,Jing Li,Xinwei Du,Haisheng Wei
The development of highly dispersed supported noble-metal catalysts is crucial for maximizing atomic utilization and enhancing catalytic performance. This work demonstrates a highly efficient Au–Pt bimetallic catalyst supported on 2-methylimidazole-modified ZnO (N-ZnO) for the chemoselective hydrogenation of nitroarenes. The modification creates strong anchoring sites for metal precursors, which, as confirmed by DFT calculations, effectively suppress metal aggregation and yield highly dispersed nanoparticles with an average size of 2.9 nm. The resulting Au–Pt/N-ZnO catalyst exhibits exceptional performance in the hydrogenation of p-chloronitrobenzene under mild conditions (50 °C and 0.5 MPa H2), achieving >99% conversion and 98.6% selectivity to p-chloroaniline, significantly outperforming its monometallic counterparts due to the synergistic effect. The catalyst also exhibited excellent recyclability and broad substrate applicability for various substituted nitroarenes. This work provides an effective strategy for fabricating highly efficient supported bimetallic catalysts through the organic ligand-mediated surface modification of metal oxide supports.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ya-Qi Xue,Lei Wang,Yin Wang,Xiao Liu,Bin Lei,Xi-Ze Liu,Bo Li,Qian Yang,Jin Chang,Wei-Wei Ding,Jian-Gong Ma,Peng Cheng
Platinum-based hydrosilylation catalysts are primarily applied in the curing of silicone rubber. However, the commercial Karstedt catalysts used in industrial applications seriously suffer from rapid oxidation in air, uncontrolled activity at room temperature, rigorous storage conditions yet short pot-life, poor thermal stability, and complicated operation packages. Herein, Pt@MOFs, constructed by immobilizing catalytically active sites Pt inside the pores of a metastable MOF-based host with selected decomposition temperature, acts as a “controlled-release MOF-based capsule” to keep a long pot-life during storage and transport at ambient conditions, control the curing temperature of hydrosilylation, and releases the catalytically active Pt sites at required temperature for in situ polymer formation. Additionally, the unique nanosized crystalline MOF carriers are dominant for uniform dispersion in polysiloxanes and guarantee the excellent oxidation resistance in the Pt@MOFs catalytic system, which provides a new generation catalyst for widely used silicone rubber packages and an innovative pathway for the application of metastable MOF materials. Honeywell® has initiated kilogram-scale silicon rubber packages with Pt@MOFs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）