JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Tian Tang,Jianing Ma,Jingyu Xue,Xiaoqiang Shen,Jinfei Chen,Linhan Yu,Vladislav Rac,Vesna Rakić,Xinbao Li,Hao Song,Xuesen Du
Industrial sources, such as steel and power activities continue to emit substantial amounts of CO, but have not received the same level of attention as mobile sources due to a lack of relevant regulations. This work reports that a commercial Pt/Al 2 O 3 catalyst used in vehicle CO catalytic converters may face severe selenium (Se) poisoning deactivation from industrial sources. The turnover frequency (TOF) of the Pt/Al 2 O 3 catalyst (250 °C) decreased from 2.18 s −1 to 0.12 s −1 with only 0.49 wt% (ICP) Se deposition. Se deposition causes the Pt 5d orbital shift to a higher energy state, raising the oxidation state of platinum. As a result, the back-donation from the 5d electrons of Pt to the 2π* antibonding orbital of the adsorbed CO molecule is inhibited, weakening the bonding between Pt/Al 2 O 3 and the CO antibonding orbital, thereby significantly reducing CO activation ability. DRIFTS results, combined with apparent and microscopic kinetics, indicate that the surface of Se deposited Pt/Al 2 O 3 catalyst remains O* available (500 K, θ O* = 0.16), and the rate-controlling step changes from O 2 + 2* → 2O* to CO + * → CO*. The work suggests that the application of CO catalytic oxidation technology for industrial source should fully consider the toxic effect of Se, but is often neglected.
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Small
·
2022
·Vol. 18
·期 40
·2202939
·
IF 15.153
Hongli Yang,Dongdong Zhang,Yong Luo,Wenxiang Yang,Xiaoqiang Zhan,Weiyou Yang,Huilin Hou
Photocatalytic CO 2 reduction by solar energy into carbonaceous feedstock chemicals is recognized as one of the effective ways to mitigate both the energy crisis and greenhouse effect, which fundamentally relies on the development of advanced photocatalysts. Here, the exploration of porous microrod photocatalysts based on novel Ni Co O solid solutions derived from bimetallic metal–organic frameworks (MOFs) is reported. They exhibit overall enhanced photocatalytic performance with both high activity and remarkable selectivity for reducing CO 2 into CO under visible-light irradiation, which are superior to most related photocatalysts reported. Accordingly, the Ni 0.2 -Co 0.8 -O microrod (MR-N 0.2 C 0.8 O) photocatalyst delivers high efficiency for photocatalytic CO 2 reduction into CO at a rate up to ≈277 µmol g –1 h –1 , which is ≈35 times to that of its NiO counterpart. Furthermore, they display a high selectivity of ≈85.12%, which is not only better than that of synthesized Co 3 O 4 (61.25%) but also superior to that of reported Co 3 O 4 -based photocatalysts. It is confirmed that the Co and Ni species are responsible for CO 2 CO conversion activity and selectivity, respectively. In addition, it is verified, by adjusting the Ni contents, that the band structure of Ni Co O microrods can be tailored with favorable reduction band potentials, which thus enhance the selectivity toward CO 2 photoreduction.
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高影响因子
FOOD CHEMISTRY
·
2018
·
IF 4.946
Huimin Wang,Haiyan Liu,Bin Guo,Dandan Lan,Xiaomin Pang,Hongyuan Yan,Dandan Han,Huaizhong Guo,Ligai Bai
A novel monolithic column was prepared by in-situ free radical polymerization using N -methylolacrylamide (NMA) and N , N -diethylacrylamide (DEA) as co-monomers. The monolith was characterized by scanning electron microscopy (SEM) and its nitrogen adsorption-desorption isotherm, and it was used as a solid phase extraction (SPE) absorbent for the online enrichment of β-sitosterol by high performance liquid chromatography. The optimized method had good linearity, and the linear regression coefficient was 0.998. The limit of detection (LOD) and the limit of quantification (LOQ) were 0.006 mg/mL and 0.02 mg/mL, respectively. The interday and intraday accuracies were less than 7.28%. The spiked recoveries of β-sitosterol in the six plant oil were 90.96–103.56%. The maximum amount of β-sitosterol adsorbed on the monolithic column was 12.69 mg/g, and the enrichment factor of β-sitosterol was 78. The results showed that the monolith could be used as an online SPE absorbent for the determination of β-sitosterol in plant oil samples.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jian Tian,Xuwen Zhang,Mengge Wu,Benhuan Xu,Kok Bing Tan,Bin Chen,Guowu Zhan
The conversion of stearic acid to linear hydrocarbons represents a critical step in the advancement of sustainable biofuels and biochemicals. In this work, a confined NiCo bimetallic catalyst (Nix-Co/C@TSC) was assembled on biochar derived from natural Tung shell (TS) using an in situ growth approach for the H2-free catalytic deoxygenation of fatty acids. The catalyst exhibited exceptional catalytic performance, achieving a high conversion of 98.2% and a remarkable selectivity of 82.8% for heptadecane. Multiple characterization revealed that the Tung shell-derived biochar (TSC) support significantly enhanced the spatial dispersion of Co and Ni species, promoting the formation of the NiCo alloy phase. This structural modification, combined with improved reactant adsorption capabilities, synergistically boosted the overall catalytic activity. In situ DRIFTS analysis revealed that CoOx species activate stearic acid via strong carboxyl-group adsorption, while Ni preferentially promotes the decarboxylation pathway by stabilizing key intermediates, collectively facilitating heptadecane formation. This work develops a novel dual carbon-supported bimetallic catalyst system, offering a promising strategy for the efficient conversion of stearic acid into high-value hydrocarbon products.
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Nanomaterials
·
2025
·Vol. 15
·期 21
·1616
·
IF 4.3
Yue Liu,Xinyu Song,Liying Wen,Yan Luo,Zhiwang Sun,Shifeng Wang
Buildings consume 40% of global energy, over half of which is used for cooling and heating. Tungsten bronze (MxWO3) holds promise for smart windows due to its ability to block near-infrared (NIR) heat radiation while maintaining visible light transmittance. However, conventional high-temperature synthesis is energy intensive. Here, we develop a low-temperature hydrothermal method (170 °C) to prepare Li and Cs co-doped tungsten oxide using WCl6, LiF, and CsOH·H2O as precursors, with acetic acid as a crystallographic modulator. The material exhibits a hexagonal structure (P63/mcm) and Li+-induced lattice expansion (0.34 nm spacing). Combined XPS and ICP-OES analyses confirm the chemical composition as Cs0.31Li0.09WO3and reveal a positive correlation between the W5+content (15.76%) and oxygen vacancy concentration, which is identified as the key factor enhancing the NIR absorption. The material demonstrates excellent visible light transmission and NIR shielding properties. Our work provides a more energy-efficient and sustainable pathway for the production of smart window materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xia Wei,Pengcheng Huan,Xiaming Chen,Guang Ji,Song Li
The interfacial electron interactions in heterogeneous catalysts are critical determinants of their catalytic efficiency. In this study, a Ni-Co alloy coating with a precisely controlled Ni/Co of 6:4 was synthesized on nickel foam (denoted as Ni-Co-6–4/NF) using NaH 2 PO 2 as a reducing agent. The resulting surface exhibited negligible phosphorus incorporation. The Ni-Co-6–4 coating featured a unique crystalline-amorphous interfacial structure. As expected, Ni-Co-6–4/NF demonstrated outstanding catalytic activity toward hydrazine oxidation, achieving a current density of 169.1 mA·cm −2 at 0.3 V versus the reversible hydrogen electrode (RHE) without i R compensation. Moreover, it maintained 100 % of its catalytic performance over 24 h of continuous electrolysis, placing it among the most durable non-noble Ni-based electrocatalysts reported for hydrazine oxidation. Density functional theory (DFT) calculations revealed that this improved performance stems from electron redistribution at the crystalline-amorphous interface, which enhances N 2 H 4 adsorption. These findings highlight the effectiveness of crystalline-amorphous interface engineering as a powerful strategy for the rational design and optimization of high-performance electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ziting Liu,Heting Chen,Panpan Qiao,Qin Mi,Qinyi Liu,Juan Zhang
The acidogenic capacity of oral cariogenic bacteria is closely related with the occurrence and development of dental caries. In this work, a novel strategy is innovatively proposed to evaluate the acidogenic capacity of cariogenic bacteria in virtue of coaggregation recognition between bacteria to accelerate acid production. Taking Streptococcus mutans as an example of oral bacteria, it has been found to co-aggregate with Bacillus camelliae 7578-1 T , a fermentation bacterium from Pu’er tea. Based on co-aggregation interaction, a metabolic substrate of S. mutans , 7578-1 T @PDBA@Mal, is prepared to load maltose (Mal) onto 7578-1 T with 1, 4-phenylenediboronic acid (PDBA) as a linker and it exhibits an initial rate of acid production that is 3.26 times higher, in comparison with that of the free Mal with the same amount. By using 7578-1 T @PDBA@Mal as metabolic substrate, the method has been established to evaluate acidogenic capacity of S. mutans with a linear range from 10 2 to 10 8 CFU/mL and a detection limit of 656 CFU/mL. The established method gives an area under the ROC curve of 0.99 by analyzing clinical saliva samples treated through centrifugation and resuspension. At the same time, Bland-Altman analysis also demonstrates high consistency with qPCR results. Moreover, the established method significantly reduces equipment dependency and saves detection time. With the ingenious usage of bacterial co-aggregation recognition to construct metabolic substrates, this strategy demonstrates a cost-effective, rapid, and simple approach that holds significant potential for precise risk assessment of dental caries.
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Advanced Optical Materials
·
2025
·Vol. 13
·期 33
·e02250
·
IF 7.2
Xuan Fan,Yanmin Yang,Mengjie Zhang,Zhiting Jiang,Chongyang Cai,Leipeng Li
Persistent phosphors, which exhibit prolonged luminescence after the cessation of excitation, hold considerable potential for a wide range of applications. However, the fundamental mechanisms governing persistent luminescence (PersL) are not yet fully understood. In this study, the archetypal YPO 4 :Ce 3+ /Dy 3+ system is investigated to provide new insights into the PersL mechanism. Under X-ray irradiation, the co-doped phosphor exhibits the characteristic emissions of both Ce 3+ (335, 356 nm) and Dy 3+ (486, 575 nm). Efficient energy transfer from Ce 3+ to Dy 3+ is confirmed, indicating their close spatial proximity. Remarkably, co-doping synergistically enhances the PersL performance of both ions, with their PersL durations being significantly prolonged compared to their singly doped counterparts. Further analysis suggests that Ce 3+ stabilizes the Dy 3+ luminescent center, a phenomenon that is attributed to the formation of associated Ce 3+ -Dy 3+ complexes. These findings support a model where such complexes act as effective charge trapping centers, enhancing PersL. Building on these tunable properties, a potential application in dynamic anti-counterfeiting is demonstrated. This work deepens the understanding of PersL mechanisms in co-doped phosphors and offers a strategy for the rational design of advanced luminescent materials.
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MATERIALS RESEARCH BULLETIN
·
2014
·
IF 1.968
Anran Xie,Wei Liu,Shuping Wang,Xiufang Liu,Jingcai Zhang,Yanzhao Yang
KClO 3 , a strong oxidant, was employed in the template-free hydrothermal synthesis of flower-like CeO 2 . The structure and physicochemical properties of the samples were characterized via the XRD, N 2 adsorption, FE-SEM, TEM, HRTEM, H 2 -TPR techniques. Through a series of experiments, the formation of flower-like CeO 2 is strongly dependent on reaction time. Meanwhile, the transformation of two phases (Ce(HCOO) 3 and CeO 2 ) and a possible mechanism for the formation of flower-like CeO 2 were preliminarily proposed. The result shows that the H 2 consumption for surface reduction of the flower-like CeO 2 sample is significantly higher than the commercial CeO 2 sample and the BET surface area of the flower-like ceria nanoparticles is 38.8 m 2 /g, which are benificial to the catalytic reaction. Compared with the commercial CeO 2 , the as-prepared flower-like CeO 2 possesses the better catalytic performance for CO conversion.
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Communications Physics
·
2026
·
IF 5.5
Guo Xiaojun,Xiao Yanzhen,Wang Sihan,Fu Zhengkun,Zhang Zhenglong
A strongly focused laser beam with high power density employed in optical tweezers typically results in photothermal damage and instability to the trapped nanoparticles or bio-targets. Here, we report an effective laser cooling of trapped Yb 3+ -Er 3+ co-doped rare-earth nanoparticle by employing a new cooling channel provided by Er 3+ and utilizing an enhancement of the anti-Stokes emission through energy transfer between Yb 3+ and Er 3+ . Especially in high temperature conditions, the co-doped system demonstrates a high laser cooling performance, that enable the temperature to decrease from 500 K to around room temperature. But for the initial temperature of around room temperature, the cooling temperature does not drop below freezing, which can avoid not only thermal but also cold damage to bio-targets in optical tweezers. This work provides experimental evidence of the Yb 3+ -Er 3+ co-doping rare-earth nanoparticle for laser cooling, which can hold a potential to address the challenge of precise measurements in optical tweezers.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Bingjie Sun,Pengjun Duan,Yuxin Yu,Jiajun Xie,Xiaozheng Han,Qiaomei Sun,Jianzhong Zheng,Zhaoxiang Zhong
Developing catalysts with superior electron transfer capabilities has emerged as a key challenge in the activation of peroxymonosulfate (PMS). Herein, the morphology and electronic structure of CeO2 catalysts were modulated through Co doping, thereby generating a higher concentration of oxygen vacancies (Ovs) and providing additional active sites for PMS activation. At a Co doping level of 25%, the two-dimensional (2D) nanosheet-structured CeO2 achieved 93.6% degradation of Tetracycline hydrochloride (TC) within 60 min, with a rate constant (k) of 0.042 min–1. Quenching experiments and electron spin resonance (ESR) analyses elucidated the involvement of both radical and nonradical pathways in the TC degradation process. Density functional theory (DFT) calculations demonstrated that Co-doped CeO2 with Ovs not only reduced the energy barrier for PMS activation but also enhanced the generation of reactive radicals. This study offers novel insights and technical support for the treatment of wastewater contaminated with recalcitrant organic pollutants.
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Journal of Energy Storage
·
2026
·
IF 9.8
Ting Liu,Menghui Yin,Beibei Li,Salifu Nasir,Qiang Chen
The accelerating demand for sustainable, high-rate, and durable energy storage underscores the need for carbon electrodes that simultaneously offer balanced micro–mesoporosity for rapid ion transport and robust heteroatom functionalities for enhanced interfacial chemistry. In the present work, we convert bitumen asphaltenes and recycled cellulose acetate into N/S co-doped hierarchical carbons via ammonium persulfate-assisted co‑carbonization and KOH activation. The optimized carbon combines an ultrahigh specific surface area of 3527 m 2 g −1 , balanced micro–mesoporosity, and uniformly distributed electroactive N/S species (pyridinic/pyrrolic N, C S, SO x ), enhancing conductivity and pseudocapacitance. In three-electrode tests, the electrode delivered 382.5 F g −1 at 0.5 A g −1 with 74% retention at 10 A g −1 . The symmetric aqueous device achieved a specific capacitance of 288.2 F g −1 at 0.5 A g −1 , energy densities of 10.01 Wh kg −1 at 257.4 W kg −1 and 5.42 Wh kg −1 at 6728.3 W kg −1 , and 108.7% capacitance retention after 10,000 cycles at 5 A g −1 . This study advances sustainable energy storage by enabling low-cost, high-performance supercapacitors and promoting solid-waste recycling.
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