SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
·
IF 6.3
Qingyang Mei,Hui Liu,Jinjia Wei
To address the challenges of structural degradation and low solar absorptivity in calcium-based thermochemical energy storage systems under high-temperature cycling, we propose a novel Mn/Al/Ce ternary-doped CaO composite (Ca10Mn1Al1Ce1) optimized for solar-driven calcium looping applications. Through a sol-gel synthesis strategy, the co-doping strategy synergistically integrates structural stabilization mediated by Ca 2 MnO 4 /Ca 3 Al 2 O 6 frameworks, carbonation kinetics enhancement through CeO 2 -induced oxygen vacancies, and Mn element doping, significantly improving the material's solar energy absorption performance. The optimized material demonstrates unprecedented cycling stability with only 5.6 % energy density decay over 200 cycles, outperforming pure CaO (73.5 % degradation after 100 cycles). Kinetic analysis reveals accelerated calcination rates enabled by Mn doping, while DFT calculations confirm an 18.3 % reduction in CaCO 3 decomposition energy barriers. Remarkably, the composite achieves a 3.9-fold enhancement in solar absorptivity through synergistic full-spectrum light harvesting. This work establishes a multifunctional doping strategy that simultaneously addresses sintering resistance, solar absorptance, and reaction kinetics, offering a promising pathway for next-generation concentrated solar power plants requiring high-temperature, long-cycle thermochemical energy storage.
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高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shiju Yang,Xueshuang Yan,Fuzhi He,Zhuliang Chen,Kaizhu Chang,Wan Yang,Futing Xia,Jianjun Chen,Qiulin Zhang
Achieving remarkable activity in selective catalytic reduction of NO by NH3 (NH3-SCR) over CeO2-based catalysts was crucial for their industrial application but still faces a tough challenge, mainly owing to the insufficient acidity and overoxidation ability. Herein, the surface acidity and reducibility of CeO2 catalysts were finely tuned over Mn–W/CeO2 to efficiently eliminate NO and reveal the mechanistic origin of superior catalytic properties. Systematic surface and structure analyses revealed that Mn3O4 interacted with WO3 species in the possible form of Mn–O–W, which could enhance the dispersion of WO3 over the CeO2 surface. The resulting well-dispersed WO3 increased the concentration of both Brønsted acid sites and strong acid sites, effectively suppressing the generation of inactive nitrates and thus providing abundant catalytically active sites for the adsorption and activation of NH3. Importantly, the electron withdrawal from Mn by W atoms associated with the shortened Mn–O bond distance resulted in the appropriate reducibility over Mn–W/CeO2. Accordingly, the undesirable overoxidation of NH3 was weakened, thereby greatly increasing the high-temperature (250–400 °C) NH3-SCR activity. DFT calculations and detailed in situ DRIFTS analysis demonstrated that both “E–R” and “L–H” mechanisms contributed mainly to this superior performance.
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PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 18
·5709-5722
·
IF 6.177
Dongbo Wang,Xiyuan Dong,Ye Lei,Changqing Lin,Dan Huang,Xin Yu,Xuan Zhang
Photocatalytic degradation of pollutants is regarded as an economical and environmentally-friendly strategy. Herein, a hollow tubular carbon nitride photocatalyst co-doped with manganese and phosphorus (Mn–PCN) was synthesized by a one-step hydrothermal–calcination method and used for the photocatalytic degradation of organic pollutants. Introducing P shaped the tubular morphology, increased the specific surface area, and enhanced the light efficiency. Adding Mn narrowed the band gap, regulated the tubular morphology, and affected the electronic structure. Co-doping P and Mn enhanced the photocatalytic performance synergistically. Compared with pure carbon nitride (CN), the photocatalytic performance of Mn–PCN was greatly improved. Rhodamine B could be removed almost completely in 150 min with 3Mn–PCN, and the degradation rate constant k was 0.01924, which was 14 times that of CN. Meanwhile, 3Mn–PCN could remove 99% of tetracycline hydrochloride, 57% of bisphenol A, and 68% of sulfamethoxazole. The Mn–PCN structure was identified and the possible mechanism was proposed according to DFT calculation and experimental results. The results provide new insights into rational design of highly active catalysts with visible light sensitive activity.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Dongdong Chu,Haoran Dong,Yangju Li,Junyang Xiao,Xiuzhen Hou,Shuxue Xiang,Qixia Dong
In this work, sulfur/nitrogen modified reduced graphene oxide (S/N-rGO) was employed as both electron shuttle and support to fabricate Fe-Mn bimetallic organic framework@S/N-rGO hybrids (BOF@S/N-rGO) via a facile two-step solvothermal route. Compared with the transition metal ions (Fe 2+ /Mn 2+ ), the classical metal oxide catalyst (Fe 2 O 3 and Fe 3 O 4 ) and nano zero-valent iron (nZVI), BOF@S/N-rGO catalyst can more effectively activate peroxydisulfate (PDS) with ultra-low concentration (0.05 mM) to degrade sulfamethazine (SMT). Quenching experiments, electron paramagnetic resonance (EPR) measurement and linear sweep voltammetry (LSV) showed that the activation pathways of PDS between the two catalysts were different. In BOF@N-rGO+PDS system, the degradation of SMT was mainly attributed to the oxidation of radicals including SO 4 •− and •OH, especially SO 4 •− . However, in BOF@S-rGO+PDS system, in addition to the radical pathway, there are also non-radical pathways, namely 1 O 2 and direct electron transfer . Furthermore, the applicability of BOF@S/N-rGO used in the PDS-mediated advanced oxidation processes (AOPs) was systematically investigated in terms of the effects of operating parameters and coexisting substance (anions and humic acid (HA)), the degradation of other pollutants, as well as the stability and reusability of the catalyst. This study proved that BOF@S/N-rGO was a promising activator of PDS with ultra-low concentration for the degradation of SMT.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Zhihao Wang,Mengxiao Zhang,Jiao He,Yongan Tang,Tingchao He,Qiang Sun,Dianyuan Fan,Yu Wang
The development of emitting materials that present both photoluminescence (PL) and X-ray excited optical luminescence has recently been attracting rising research interest for visualization applications. We introduced in this study the hydrothermally crystallized (Sr 1- x Mn x ) 5 (PO 4 ) 3 F 1- y Cl y ( x = 0–0.05, y = 0–0.40) nanorods with favorable PL and X-ray excited optical luminescence properties after composition modulating. The effects of solution pH and Cl − incorporation on structure and morphology of the products were firstly unveiled. (Sr 1- x Mn x ) 5 (PO 4 ) 3 F gives green emission at ∼548 nm ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)) under either 402 nm excitation or X-ray irradiation, and the optimal PL and X-ray excited optical luminescence were observed at x = 0.03. The replacement of F − by larger Cl − led to the generation of an amount of Frenkel defects (the dislocated F − and anion vacancies V F . ) along the c -axis, benefit from which the (Sr 0.97 Mn 0.03 ) 5 (PO 4 ) 3 F 1- y Cl y samples present enhanced PL and X-ray excited optical luminescence intensities by factors of 1.6 and 7.4, respectively, and the corresponding optimal y values are determined to be 0.20 and 0.30. Fluorescence decay analysis found steadily shortened fluorescent lifetime for Mn 2+ at higher Mn 2+ and Cl − concentrations, and the underlying mechanism was discussed. The (Sr,Mn) 5 (PO 4 ) 3 (F,Cl) apatite material, with enhanced PL and X-ray excited optical luminescence, may find novel applications for both lighting and scintillating.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Tongdong Shen,Wentao Su,Qiangqiang Yang,Jun Ni,Shaoping Tong
MgM x O y (M = Fe, Mn) powders prepared by the sol-gel method were used as the catalysts for ozonation of p -hydroxybenzoic acid ( p -HBA) and acetic acid (AcOH) (20 mg/L) at a neutral pH for 9 min. The study aims to bring an insight into the synergetic mechanism for basic and acid sites of MgM x O y in heterogeneous catalytic ozonation. 84.8 %, 88.2 %, 86.7 % p -HBA were removed by ozonation catalyzed by MgFe x O y , MgMn x O y and MgO, respectively. 49.3 %, 65.8 %, 64.3 % AcOH were removed by ozonation catalyzed by the three catalysts, respectively. MgMn x O y exhibited the highest catalytic activity in ozonation of p -HBA and AcOH owing to the action of acid sites of MgMn x O y for additional ozone decomposition. The increase of solution pH, the protonation of surface hydroxyl groups and the electron transfer on acid sites induce ozone decomposition into reactive oxygen species in MgM x O y catalytic ozonation.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Nana Wang,Yingchun Liu,Linglan Men,Ziyu Yang,Jiarui Liu,Guoliang Chai,Qing Li,Changlei Xia,Huan Xie
Amorphous Mn-doped RuSe 2 nanoparticles were deposited on the wood-derived hierarchical porous carbon support. • The optimized amorphous (Ru 0.67 Mn 0.33 )Se 2 catalyst requires only 299 mV to deliver 1 A cm −2 in 0.5 M H 2 SO 4 solution. • Ru–Mn electronic coupling enriches the electron density of Ru sites and enhances *H adsorption property. • In situ Raman spectra reveal the enriched population of free-H 2 O accelerating protons transfer. • A solar-powered overall water-splitting device achieves 7.95% STH energy efficiency with excellent stability. The surficial water structure in the electrode/electrolyte double layer governs the transfer rate of protons during the acidic hydrogen evolution reaction (HER). Herein, we introduce the novel strategy to alleviate the strong hydrogen-bonded water structure by doping Mn in the amorphous RuSe 2 nanoparticles deposited on wood-derived carbon for efficient acidic HER. The optimized amorphous (Ru 97.7 Mn 2.3 )Se 2 catalyst requires only 299 mV to deliver 1 A cm −2 in 0.5 M H 2 SO 4 electrolyte, which is comparable to that of the benchmarking commercial Pt/C (20 wt%), and maintains outstanding durability for 100 h at a current density of 100 mA cm −2 . Furthermore, an acidic photovoltaic-driven overall water-splitting system employing amorphous (Ru 0.67 Mn 0.33 )Se 2 catalyst as the cathode achieves a solar-to‑hydrogen energy conversion efficiency of 7.95%. In situ Raman spectra reveal that Mn incorporation reconstructs the interfacial water environment by alleviating the strong hydrogen-bonded interfacial water structure, thereby facilitating protons transfer. Density functional theory (DFT) calculations illuminate that Mn doping induces the upshifting of the d-band center of Ru in amorphous RuSe 2 , which leads to the optimized *H adsorption/desorption thermodynamics. These results demonstrate the synergistic effects of electronic structure regulation and interfacial water structure reconstruction on the amorphous (Ru 97.7 Mn 2.3 )Se 2 catalyst enabling the efficient acidic HER and solar-driven green hydrogen production. Download: Download high-res image (220KB) Download: Download full-size image
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 11
·1031
·
IF 4
Weitao Jin,Ruiqing Song,Jiansong Yuan,Hengxi Pang,Wen Zong,Xiao Zhang,Juan Zhou
Anion exchange membrane fuel cells (AEMFCs) represent a promising class of clean energy devices, with their performance being critically dependent on the efficiency of the cathode oxygen reduction reaction (ORR) catalyst. Manganese-cobalt spinel (Mn1.5Co1.5O4, MCS) has been demonstrated to be a highly active ORR catalyst. Herein, we report a strategy of incorporating Cu (MCCS) and Fe (MCFS) into MCS to form ternary spinel oxides for tuning ORR activity. Among them, MCS exhibits the best ORR performance, with a half-wave potential (E1/2) of 0.736 V vs. RHE in 0.1 M KOH and a peak power density (PPD) of 248.3 mW·cm−2for the fuel cell test. In contrast, MCCS and MCFS show divergent behaviors in a rotating disk-ring electrode (RRDE) and fuel cell tests. X-ray diffraction (XRD) analyses and X-ray photoelectron spectroscopy (XPS) analyses reveal that the introduction of Cu2+and Fe3+induces a phase transformation in the spinel structure, leading to a reduction in oxygen vacancies and an increase in the valence state of Mn, thereby degrading catalytic activity. However, the incorporation of these elements also modulates the hydration capability of the catalysts, which is critical for the ion and charge transfer in the fuel cell environment and has been validated in the distribution of relaxation time (DRT) analysis of the fuel cell test. This study provides a valuable strategy for designing and synthesizing low-cost, highly efficient, and stable ternary spinel electrocatalysts for AEMFC applications, and bridges the gap between RRDE evaluation and fuel cell testing through DRT analysis.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Jun Zhang,Lanyu Luo,Jiankun Wang,Xinlan Xu,Tiantian Peng,Boyu Liu,Lingying Jiang,Meng Jin,Weimin Wu,Laizheng Luo,Huan Yi,Shi-Yu Lu
Optimizing the electronic configuration presents a promising approach to enhance intrinsic activity and minimize noble metal use in direct methanol fuel cells (DMFCs). Metal–support interactions, commonly employed to induce interfacial charge redistribution, play a crucial role in this optimization. This study successfully synthesized a Pd/O-OMS-2 electrocatalyst characterized by Pd–O–Mn interfacial chemical bonds and Mn3+/Mn4+ redox couples, serving as a stable bifunctional catalyst for both the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR). Unlike the mixed Pd–O/Mn bonds in Pd/O/Mn-OMS-2, the Pd–O–Mn bonds in Pd/O-OMS-2 not only enhance metal–support interactions and promote uniform dispersion of Pd nanoparticles but also facilitate electron transfer and the conversion between Mn3+ and Mn4+. These structural and compositional advantages endow the Pd/O-OMS-2 catalyst with superior ORR and MOR performance. The catalyst achieves a higher half-wave potential (E1/2) of 0.901 V, a mass activity of 0.937 A mgPd–1, and enhanced methanol permeability, outperforming Pd/O/Mn-OMS-2, Pd/OMS-2 and commercial Pd/C catalysts. Moreover, in an alkaline electrolyte, the Pd/O-OMS-2 catalyst follows a typical four-electron reaction pathway for ORR (O2 to H2O) and promotes faster reaction kinetics and charge transfer rates. In terms of durability, the Pd/O-OMS-2 catalyst exhibits minimal E1/2 decay (8 mV) and retains its structural integrity even after 10,000 cyclic voltammetry (CV) cycles. Additionally, it demonstrates the highest mass activity and stability during the MOR process. The exceptional ORR/MOR performance can be attributed to the synergistic effect of strong metal–support interactions, high Pd nanoparticle dispersion, and increased Mn3+ active species. The construction of interfacial chemical bonds offers a prospective strategy to optimize electronic configurations and develop advanced bifunctional electrocatalysts for ORR and MOR.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 18
·8534-8544
·
IF 3.925
Ruowei Lu,Cuijuan Wang,Yanxia Chen,Lichuan Tan,Peng Wang,Siwen Feng
Adsorption and Fenton catalysis technologies have been widely used to treat wastewater. Herein, Zr-MOF composites are synthesized with Mn-doped magnetic hierarchical porosity and ionic liquid (IL) post-functionalization (MFC@Mn-NH2-UiO-66@IL). The characterization of the composite shows that the MOF we synthesized is laminar and porous, which promotes the adsorption process and subsequent H2O2 decomposition catalysis. Electrostatic interactions, hydrogen bonds, and π–π stacking interactions between [BMIM][PF6] and methylene blue (MB) greatly improve the adsorption performance. Subsequently, H2O2 is rapidly decomposed in a Zr-MOF and Fe3O4 system to produce ˙OH for the oxidative decomposition of MB. Zr plays an electron transfer role in the catalytic reaction. The MFC@Mn-NH2-UiO-66@IL material has a high adsorption capacity for aqueous MB solutions. In combination with the subsequent Fenton-like oxidation reaction, a removal efficiency of 98% is achieved in 90 min. We believe that our work has essential impact in the field of wastewater treatment based on the advantages of the MOF's dual function in degrading pollutants in water.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 17
·2997
·
IF 5.719
Fei Li,Jie Gao,Haocheng Wu,Yijun Li,Xiwen He,Langxing Chen
Roxarsone (ROX) as an organoarsenic feed additive has been widely used in livestock breeding and poultry industry, but ROX can degrade into highly toxic inorganic arsenic species in natural environments to threaten to the environment and human health. Therefore, there is a considerable interest in developing convenient, selective and sensitive methods for the detection of ROX in livestock breeding and poultry industry. In this work, a fluorescent molecularly imprinted polymer (MIPs) probe based on amino-modified Mn-ZnS quantum dots (QDs) has been developed by sol–gel polymerization for specific recognition of ROX. The synthesized MIPs-coated Mn-ZnS QDs (MIPs@Mn-ZnS QDs) have highly selective recognition sites to ROX because there are multi-interactions among the template ROX, functional monomer phenyltrimethoxysilane and the amino-functionalized QDs such as the π–π conjugating effect, hydrogen bonds. Under the optimal conditions, an obvious fluorescence quenching was observed when ROX was added to the solution, and the quenching mechanism could be explained as the photo-induced electron transfer. The MIPs@Mn-ZnS QDs sensor exhibited sensitive response to ROX in the linear range from 3.75×10−8M to 6.25×10−7M (R2= 0.9985) and the limit of detection down to 4.34 nM. Moreover, the fluorescence probe has been applied to the quantitative detection of ROX in feed samples, and the recovery was in the range of 91.9% to 108.0%. The work demonstrated that the prepared MIPs@Mn-ZnS QDs probe has a good potential for rapid and sensitive determination of ROX in complicated samples.
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高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Kunlun Yang,Cheng Li,Xiaomin Wang,Yuanli Liu,Yizhou Li,Chuchen Zhou,Zheni Wang,Jiasheng Zhou,Zhen Cao,Xinhua Xu
In this work, the surface properties, functional groups and stability of Fe–Mn bimetal composite (FMBC) was modified through sintering to improve the weaknesses of pristine FMBC, such as poor separation performance, high amount of dissolved Fe and Mn, and easy phase transformation. Characterization analysis indicated that 2-line ferrihydrite in sintered FMBC (SFMC) gradually transformed into hematite with the phase-transition temperature of 450 °C. With the increasing sintering temperature and time, the dehydroxylation reaction enhanced and gradually became irreversible, while the BET surface area and porosity of SFMC firstly increased and then decreased, resulting in the initial increase and then sharp decrease of the amount of exposed hydroxyl groups on SFMC. The sintering treatment greatly improved the separation performance and stability of SFMC. 350 °C and 2 h were determined as the optimal sintering conditions of SFMC in this study and the calculated maximum adsorption capacity of optimal SFMC reached up to 95 mg/g. Freundlich model and pseudo-second-order kinetics model can describe the Sb(V) adsorption data well. As compared to pristine FMBC, optimal SFMC presented larger BET surface area and porosity, better separation performance and stability, lower dissolved Fe and Mn amount, larger cyclic adsorption efficiency and enough ability for Sb(V) removal in real textile wastewater. Furthermore, the inner sphere complexation between Sb(OH) 6 - and exposed hydroxyl groups played a key role in adsorption. Additionally, the NaCl + NaOH elution exhibited greater Sb(V) desorption performance and effectively retarded the phase transformation of SFMC than NaOH solution.
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高影响因子
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