APPLIED CATALYSIS A-GENERAL
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2025
·
IF 4.8
Xinyu Liu,Chengxiong Wang,Feng Feng,Yinglong Wu,Shiying Chang,Guangxin Liu,Dong Tian,Weinan Yang,Xianming Cheng,Dongxia Yang,Kongzhai Li,Yunkun Zhao
Catalyst deactivation caused by SO 2 poisoning generally hinders commercial viability of CO oxidation catalysts in the field of industrial flue gas purification. XPS results, CO-DRIFTS spectra and DFT calculations suggested that Pt was highly-dispersed and remained the oxidative states on SnO 2 support, resulting in that the rate-determining step of CO oxidation is to clean up the adsorbed CO and PtS 2 species is readily formed in a SO 2 -contained hydrothermal environment. It predominantly maintained metallic Pt 0 in the Pt/WO 3 catalyst, thereby led to cleaning up the activated oxygen atoms as the rate-determining step. It is very difficult to remove the sulfur species in SO 2 -poisoned catalysts within 600 °C and the mechanisms of CO oxidation are not affected by SO 2 poisoning for Pt/SnO 2 and Pt/WO 3 catalysts. These findings provide some significant insights to understand the mechanisms of CO oxidation and SO 2 -tolerance.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Xin Zhang,Shuyan Miao,Jing Zhou,Tingting Zhou,Tian Gan,Yong Tang
We present a disposable paper-based molecularly imprinted electrochemical sensor for highly sensitive and selective monitoring of phenolic pollutants. The sensor features a fully integrated three-electrode array fabricated through an eco-friendly vacuum filtration method, which utilizes single-walled carbon nanotube-based substrates to provide excellent conductivity, large surface area, and low-cost electrode platforms. These substrates enable effective deposition of hollow-structured zeolitic imidazolate framework-8-derived N-doped carbon polyhedrons supporting Pt single-atom catalysts (Pt-N-C) synthesized via high-temperature calcination. Subsequent electropolymerization of a molecularly imprinted polymer (MIP) on the electrode surface was achieved using 3,4-ethylenedioxythiophene and pyrrole as dual functional monomers. Comprehensive characterization demonstrates that the Pt-N-C architecture exhibits abundant atomic Pt catalytic sites, nitrogen-decorated hierarchical porosity, and maximized electrochemical accessibility, collectively contributing to exceptional detection sensitivity for multiple phenolic compounds including 2-chloro-4-methoxyphenol, 4-bromo-2-methoxyphenol, 4-aminophenol, and 4-nitrophenol. Concurrently, the MIP layer demonstrates rapid binding kinetics and high molecular recognition capacity, significantly enhancing selective identification capabilities. The developed sensor successfully achieves direct quantification of these phenolic contaminants in unprocessed complex wastewater samples without requiring pretreatment procedures.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Danfeng Xiao,Huihui Li,Hengtao Fu,Xiaofei Chen,Zelong Li,Yuhua Wang
Developing acid-tolerant photocatalysts for efficient water oxidation in unmodified Fe3+ redox media is pivotal for realizing solar energy storage via the “hydrogen farm” strategy, yet remains challenging due to intrinsic charge recombination and corrosion issues. Here, we introduce a nitrogen-doped hexagonal/tetragonal BaTa2O6 heterophase photocatalyst decorated with spatially separated Pt and CoOx cocatalysts for stable oxygen evolution in acidic Fe(NO3)3 solutions (pH 1.8). The heterophase junction, corroborated by high-resolution transmission electron microscopy (HRTEM), creates a directional built-in electric field (evidenced by surface photovoltage spectroscopy) that minimizes interfacial energy loss (<0.2 eV, confirmed by density functional theory calculations). Selective photodeposition of Pt at particle termini and CoOx on lateral surfaces spatially decouples Fe3+ reduction and water oxidation half-reactions, effectively suppressing charge recombination. Enabled by nitrogen doping-induced bandgap narrowing (light absorption up to 630 nm), the optimized catalyst achieves an unprecedented O2 evolution rate of 124 μmol h−1 under visible light, with apparent quantum efficiencies of 10.5% at 420 nm and 0.3% at 600 nm. The system maintains over 93% activity for 12 h and demonstrates robust compatibility with Fe2+/Fe3+ redox cycling, confirmed by the stoichiometric production of H2/O2 (2 : 1) in a Z-scheme overall water splitting configuration. This work establishes a novel heterophase engineering approach for designing acid-stable photocatalysts, offering a promising pathway toward practical solar-to-chemical energy conversion.
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RSC Advances
·
2024
·Vol. 14
·期 37
·27310-27322
·
IF 3.9
Zhengjian Hou,Ke Wu,Huijie Wei,Hua Chi,Yanyan Xi,Lishuang Ma,Xufeng Lin
In this study, two series of samples (rT-Pt/TiO2 prepared with a hydrogen pretreatment and Tr-Pt/TiO2 prepared with an oxygen pretreatment) were prepared by treating commercial TiO2 supports in different atmospheres to establish different TiO2 interfacial structures, followed by the addition of platinum nanoparticles (NPs) for the catalyzed hydrogenation/dehydrogenation cycle of N-ethylcarbazole (NEC). The kinetic analysis and reaction mechanism were investigated by combining XRD, Raman, CO-DRIFT, HRTEM, XPS, H2-TPD and DFT calculations. It was found that the performance of the samples for the NEC system's cyclic hydrogen storage could be modulated by treating the TiO2 interfacial structure with different atmospheres varying the extent of strong metal-support interaction (SMSI). In addition, a turnover frequency (TOF) of 191.52 min−1 for dehydrogenation was achieved at 170 °C, which is better than the previously reported catalysts. Experimental studies (characterization and kinetic studies) and DFT calculations confirmed that the SMSI of the Tr-Pt/TiO2 series samples promoted the escape of H2 and enhanced the catalytic activity for 4H-NEC in the 12H-NEC dehydrogenation reaction. In the NEC hydrogenation reaction, the rT-Pt/TiO2 series samples were pretreated with H2 before loading platinum metal, which led to the early activation of Ti4+ in their carriers, and thus suppressed the SMSI effect of the reduction process after loading platinum. This process caused the interface formed by rT-Pt/TiO2 to have a higher energy barrier to 6H-NEC, which is an intermediate product of the NEC hydrogenation process, and this interrupted the hydrogenation process of 6H-NEC.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yuzhe Liu,Xulei Sui,Lixiao Shen,Xingshuai Lv,Longji Yuan,Anyu Li,Xueda Du,Bin Wu,Wenliang Feng,Zhen Zhang,Hong Chen,He Qi,Hui Pan,Zhenbo Wang
The popularization of proton exchange membrane fuel cells is hindered by low activity, poor stability and low utilization rate of Pt catalyst. Herein, an organic molecule layer (OML) is first in-situ directionally assembled on Pt surface via hydrogen bonding and Pt-N coordination. The amino group in OML bond with adsorbed O₂ to facilitate O–O cleavage based on hydrogen bond effect, enabling dual-channel electron acceptance and boosting the intrinsic activity of Pt by 5.5-fold. The OML also acts as a protective matrix to enhance the stability of Pt. In H₂/Air fuel cells, the catalyst achieves 1.11 W cm⁻² at 0.67 V with low Pt loading of 0.125 mg cm⁻². Notably, it delivers no current decay at 0.8 V, 10 mV potential decay at 0.8 A cm⁻², and a mere 6 % mass activity loss after 30,000 cycles. These results outperform DOE 2025 targets and state-of-the-art Pt catalysts. The OML construction strategy offers innovative concepts for high-performance Pt catalyst design and enables large-scale production.
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CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Zhounan Yu,Leilei Zhang,Yuanlong Tan,Rizheng Jing,Hongchen Cao,Caiyi Lou,Rile Ge,Junhu Wang,Aiqin Wang,Tao Zhang
Rh-P complexes have been widely used as catalysts for hydroformylation reactions. The extremely high price of Rh and its scarce reserves have prompted the exploration of the alternatives. In this study, we reported that Pt/PS-PPh 2 single-atom catalysts promoted by SnCl 2 were highly efficient and selective for the hydroformylation of higher α-alkenes. A broad scope of substrates (i.e., C 6 –C 12 ) were smoothly converted to the corresponding linear aldehydes with high yields under reaction conditions of 90–120 °C and 4–6 MPa syngas . The turnover frequency (TOF) was comparable to homogeneous Pt-Sn catalysts, and the linear/branched ratio reached as high as > 20. In addition, the catalyst could be reused with the extra addition of SnCl 2 . The promotional role of SnCl 2 was elucidated by quasi- in situ X-ray adsorption fine structure, Fourier transform infrared, and Mössbauer spectroscopy . It was discovered that SnCl 2 was transformed into Sn(dioxane)Cl 3 − species coordinated to Pt as a moderately electron-donating ligand, which, together with the phosphine group, stabilized mononuclear Pt (I) species against reduction and aggregation.
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TALANTA
·
2024
·
IF 5.6
Yiquan Liao,Yichang He,Bin Zhang,Ye Ma,Minggang Zhao,Ruiqi Xu,Hongzhi Cui
Glutathione (GSH) is an essential antioxidant in the human body, but its detection is difficult due to the interference of complex components in serum. Herein, hollow double-layer Pt@CeO 2 nanospheres were developed as oxidase mimetics, and the light-assisted oxidase mimetics effects were found. The oxidase activity was enhanced significantly by utilizing the synergistic effect of Schottky junction and the localized surface plasmon resonance (LSPR) of Pt under UV light . A novel GSH colorimetric-fluorescent-SERS sensing platform was established, with the sensing performance notably boosted by using the light-assisted oxidase mimetics effects. This platform boasts an exceptionally low detection limit (LOD) of 0.084 μM, while the detection time was shortened from 10 min to just 2 min. The anti-interference detection with high recovery rate (96.84%–107.4 %) in real serum made it be promising for practical application.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xuemin Zhong,Peng Yuan,Yanfu Wei,Dong Liu,Dusan Losic,Mengyuan Li
The aerobic oxidation of 5-hydroxymethylfurfural (HMF), a key platform compound derived from biomass, to 2,5-furandicarboxylic acid (FDCA) is a highly important reaction in the production of green and sustainable chemicals. Here, we developed a highly efficient and stable halloysite-supported Pt–Au alloy catalyst for the selective oxidation of HMF to FDCA. The catalyst was synthesized through the organosilane functionalization of halloysite nanotubes, followed by the in situ formation and dispersion of Pt–Au alloy nanoparticles on the internal and external surfaces of nanotubes. The composition, morphology, and structure of the prepared catalyst were characterized. The catalyst with the optimal composition of Pt/Au molar ratio of 1/4 and metal loading of 1.5 wt % exhibited outstanding catalytic activity for the oxidation of HMF to FDCA using O2 as an oxidant with 100% conversion of HMF and 99% selectivity of FDCA. This excellent catalytic performance is mainly attributed to the high dispersion and alloying effects of bimetallic nanoparticles, which promoted the activation of reactants or intermediates and further improved FDCA selectivity. Furthermore, the halloysite-supported Pt/Au bimetallic catalyst showed high stability and reusability. This study provides a promising strategy by combining clay mineral halloysite and bimetallic alloys for developing efficient catalysts with high FDCA selectivity and stability for the oxidation of HMF to FDCA.
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RSC Advances
·
2013
·Vol. 3
·期 31
·12635-12640
·
IF 2.562
Yuxin Wang,Jinhu Wu,Shengnian Wang
The importance of the acidity and mesoporous structure to the hydrodeoxygenation activity of catalysts for bio-oil upgrading was investigated. By testing three model bio-oil compounds, we showed that catalysts with a strong acidity (e.g. ZSM-5) have a high hydrodeoxygenation activity, while the mesoporous structure of the support can further improve the catalytic performance of ZSM-5.
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Sustainable Energy & Fuels
·
2020
·Vol. 5
·期 4
·1059-1066
·
IF 5.503
Xin Xiao,Dongping Sun,Xiaoheng Liu,Bo Qiu,Xingyou Xu,Dongen Zhang,Tao Yang
It is still a challenge to design an efficient and low-cost electrocatalyst for the hydrogen evolution reaction (HER) in an alkaline electrolyte. Herein, ultra-low amount Pt-doped Co2P/Ni2P on nickel foam (Pt/Co2P/Ni2P/NF) was facilely synthesized via an in situ controlled growth and used as an efficient electrocatalyst for electrolytic water splitting into hydrogen. Pt/Co2P/Ni2P/NF was achieved by a two-step procedure that was conducted by the hydrothermal approach to obtain the precursor, followed by a subsequent in situ phosphorization procedure. Due to the NF substrate being supermacroporous, more active sites of Pt/Co2P/Ni2P/NF could be exposed, improving electron transport and providing open-channels for the rapid release of H2. Pt/Co2P/Ni2P/NF exhibited remarkable electrocatalytic performance towards HER with an overpotential of 75 mV at 10 mA cm−2 in an alkaline electrolyte and a small Tafel slope of 64 mV dec−1. This work provided a facile and reliable synthetic approach to improve transition metal phosphides (TMPs) for electrocatalytic HER performance in alkaline electrolytes.
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ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Chong Xu,Jie Zhang,Xing Qian,Weimin Wu,Jiahui Yang,Linxi Hou
Due to the unique features including well-defined void space and high surface-to-volume ratio, non-noble metal catalysts with hollow structures have received intensive researches in dye-sensitized solar cells (DSSCs) and electrochemical water splitting. Herein, we prepare a series of cobalt-incorporated molybdenum sulfide hollow nanoboxes (denoted as Co-MoS x NBs) via a one-step fleet template conversion from cube-shaped Co-based zeolitic imidazolate framework-67 which precipitated without prolonged aged process. During above transformation, it is notable that the surface morphologies of nanobox can be effectively tailored by the proportion of MoS 4 2− . The as-obtained Co-MoS x NBs with well-defined boxed structure and the appropriate doped ratio are developed as bifunctional catalysts for accelerating both reduction of I 3 − in DSSCs and hydrogen evolution reaction (HER). As expected, a high power conversion efficiency (9.64%) is achieved by Co-MoS x -1/3 NBs based DSSC under AM 1.5G irradiation, which is much preceded to that of Pt (8.39%). Meanwhile, the practical utilization of Co-MoS x -1/3 NBs for HER yields a low onset overpotential (35 mV) and a small Tafel slope (61.4 mV decade −1 ) in alkaline medium.
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BIOELECTROCHEMISTRY
·
2019
·
IF 4.474
Shuan Zhang,Chunyan Zhang,Yilei Jia,Xiaobo Zhang,Yunhui Dong,Xinjin Li,Qing Liu,Yueyun Li,Zengdian Zhao
A sandwich-type electrochemical immunosensor was fabricated for the quantitation of alpha fetoprotein (AFP). To this end, the Au@Pt dendritic nanorods loaded with amino functionalized molybdenum selenide nanosheets (Au@Pt 41 DNRs/NH2-MoSe2 NSs) with enhanced peroxidase-like properties were selected as the secondary antibody label (Ab2) to achieve signal amplification. The as-obtained Au@Pt DNRs/NH2-MoSe2 NSs exhibited better catalytic activity toward hydrogen peroxide reduction and offered rich anchors for bioconjugation . Meanwhile, gold nanoparticles anchored on an amino functionalized graphene (Au NPs/NH2-GS) composite with admirable conductivity and biocompatibility was used as the matrix material to improve sensitivity. Under optimal conditions, amperometric current responses had a good linear relationship with the logarithm values of AFP concentration in the range 10 fg mL –1 to 200 ng mL –1 with a detection limit of 3.3 fg mL –1 (S/N = 3). Additionally, the immunosensor had excellent reproducibility, selectivity, and stability, which indicated superior performance for AFP detection compared with previous reports. The satisfactory results of human serum samples analysis showed that the designed immunosensor has potential applicability for the sensitive detection of other tumor markers.
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