FUEL
·
2024
·
IF 6.7
Zhige Zhang,Guican Bi,Shenglong Zhang,Tao Tan,Jun Xie
The use of biogas as renewable raw material to produce syngas（H 2 /CO ≈ 2）suitable for direct synthesis of methanol has attracted wide attention, but designing promising catalysts with high activity and stability remains a challenge. The catalytic systems used for this process usually have the characteristics of poor stability and easy carbon deposition. Here, Based on the Ce redox cycle and the strong metal-support interaction (SMSI), we designed and synthesized a series of Ni catalysts (denoted as Ni/CeMgO x /BN) with BN interfacial constraints. The abundant oxygen vacancy of reaction-induced Ce redox cycle endows Ni/CeMgO x /BN with excellent carbon resistance, because the ability to activate CO 2 /H 2 O is significantly enhanced. The CO 2 /H 2 O activation and carbon elimination mechanism were comprehensively characterized by in situ H 2 -TPR/CO 2 /H 2 O-TPSR, in situ CH 4 -TPSR/CO 2 /H 2 O-TPO, and FTIR, etc. Ascribed to the appropriate basicity of CeMgO x , homogeneous Ni dispersion, and strong interaction between Ni ultra-small nano particles (NPs) and CeMgO x /BN, Ni/CeMgO x /BN exhibit higher CO 2 /H 2 O adsorption/activation, higher CH 4 activation/dissociation, compared with another samples, which facilitate the formation of active oxygen species and intermediate coke removal, thus enhance the resistance to coke deposition and sintering. At 750 °C, Ni/CeMgO x /BN exhibit satisfying catalytic activity (CH 4 /CO 2 conversation 92 %/52 %) and superior stability (100 h) with negligible deactivation rates.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huanmin Liu,Jiayi Peng,Xu Zhang,Kun Zheng,Lirong Zheng,Kangle Lv,Qin Li,Peng Zhou
Employing water and biomass fuels, such as benzyl alcohol, as feedstocks for co-producing hydrogen (H 2 ) and value-added organic chemicals under solar irradiation presents a promising strategy towards accomplishing net-zero emission objectives. However, simultaneously building the optimal hydrogen-evolution and organic-dehydrogenation centers on photocatalyst surface has long been the pursuit. Herein, a facile vacancy-based strategy was utilized to engineer atomically dispersed Pt species coordinated with three foreign ligand nitrogen atoms (Pt-N 3 ) instead of intrinsic S atoms on CdS nanorods. The experimental observation demonstrates a distinctive electron-rich characteristics of Pt-N 3 structure, markedly augmenting the photogenerated charge separation efficiency via one interfacial charge effects. The density functional theory (DFT) simulation further indicates that the foreign ligand N atoms not only maintain the low hydrogen-evolution energy barrier of Pt center, but also greatly reduce the energy barrier of rate-determining benzyl alcohol dehydrogenation by forming the strong chemical interaction between ligand N atom and intermediate. Consequently, PtN 3 -CdS exhibited a high photocatalytic activity for coproduction of H 2 (5.4 mmol g −1 h −1 ) and benzaldehyde (5.2 mmol g −1 h −1 ) with a selectivity of 95.9% for value-added benzaldehyde, with the anticipation of bolstering its commercial accessibility and expediting its integration into industrial applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Hua Jin,Linjian Yu,Kun Xiong,Jia Chen,Haidong Zhang,Min Deng,Xueqing Shi
Efficient hydrogen production by water electrolysis is primarily restrained by imperfect over-potential and poor reaction dynamics on oxygen evolution reaction (OER). Thermodynamically favourable urea oxidation reaction (UOR) is a class of promising routes for substituting sluggish OER and for coupling with cathodic hydrogen production because of smaller equilibrium potential (0.37 V) than that of OER (1.23 V). Herein, a versatile Ru-NiO/p-Ni catalyst was prepared through in-situ generating nickel hydroxide nanosheets on the surface of ordered porous Ni, then doping low Ru and annealing treatment. The optimized Ru-NiO/p-Ni displayed outstanding activity and stability towards hydrogen evolution reaction (HER), OER and UOR with potentials of −0.13 V, 1.57 V, and 1.39 V at 100 mA cm −2 , respectively. Ru-NiO/p-Ni‖Ru-NiO/p-Ni can achieve 100 mA cm −2 in urea-aided water splitting at a voltage of only 1.58 V, which is prominently 170 mV smaller than the voltage of water electrolysis (1.75 V). The excellent electrocatalytic performance is owing to the outstanding inherent activity generated by cooperative effect of Ru and NiO, along with rich defect and active centre of Ru-NiO/p-Ni supplied by the large surface area of 3D porous structure. The formation of more rich Ni active species with a high valence through transport of electrons between Ru and Ni is favourable to promoting the dissociation of urea molecules, eventually improving UOR. Therefore, it can facilitate urea-aided water splitting, which provides a valuable strategy for constructing versatile catalysts for a cathodic energy-efficient hydrogen production coupled with other anodic oxidation reactions.
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高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 38
·20512-20519
·
IF 5.968
Sa Liu,Li Zhou,Pengjie Wang,Linsong Zhang,Zhigang Shao,Baolian Yi
A new blend ultrafiltration (UF)/nanofiltration (NF)-based proton-conductive membrane, which comprised poly(ether sulfone) (PES), sulfonated poly(ether ether ketone) (SPEEK) and absorbed aqueous acid, as an alternative to traditional exchange membrane, was proposed and designed for H2/Cl2 fuel cells. The effect of SPEEK concentration at different degree of sulfonation on membrane properties was systematically studied. The room-temperature conductivity of the prepared membrane doped with 3 M hydrochloric acid reached up to 106–131 mS cm−1. The electrochemical characteristics of membrane/electrode assemblies using the PES–SPEEK composite membrane were also analyzed. The cell exhibited better performance than that of a cell based on Nafion 212 membrane (about twice). The study provides an effective way to fabricate high performance porous membranes for H2/Cl2 fuel cell applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Qi Li,Shengchao Yang,Yufan Huang,Yuwei Liang,Chunling Hu,Min Wang,Zhiyong Liu,Yanlong Tai,Jichang Liu,Yongsheng Li
The difficulty in fabricating a multifaceted composite heterojunction system based on Cd x Zn 1- x S limits the enhancement of photocatalytic performance. In the present scrutiny, novel ZnO/Cd x Zn 1- x S/CdS composite heterojunctions are successfully prepared by the alkaline dissolution etching method. The internal electric field at the interface of I-type and Z-scheme heterojunction improved the effective charge separation. The ZC 8 sample exhibits excellent photocatalytic performance and the H 2 production efficiency is 15.67 mmol g −1 h −1 with good stability up to 82.9 % in 24-hour cycles. The performance of CH 4 and CO capacity in the CO 2 RR process is 3.47 μmol g −1 h −1 and 23.5 μmol g −1 h −1 , respectively. The photogenerated accelerated charge transport is then examined in detail by in situ X-ray photoelectron spectroscopy (ISXPS) and density functional theory (DFT) calculations. This work presents a new idea for the synthesis of Cd x Zn 1- x S solid-solution-based materials and provides a solid reference for the detailed mechanism regarding the electric field at the heterojunction interface.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Minjie Chen,Chaohuang Chen,Qianhai Zhou,Hui Jin,Xiaohong Hu,Chen Miao,Kaijian Sang,Jiang Xu,Saiyong Zhu,Daohui Lin
Nanoscale zero-valent iron (nZVI) is a promising material for pollution remediation, but its practical application is limited by the lack of scaling up preparation method and the high cost of raw materials. In this study, the ball-milling method is used to prepare nanoscale iron oxide prior to high temperature H 2 -reduction, producing ball-milled and then H 2 -reduced nZVI ( BM−RE ZVI). It is demonstrated the strained iron oxide crystals after ball-milling increased the specific surface area, while the high-temperature H 2 -reduction process decreased iron vacancy. In this way, the ball-milling strain and the high-temperature H 2 -reduction together facilitated the exposure of (200) Fe planes (i.e. [100] Fe direction) of the obtained BM−RE ZVI, thereby enhancing reactivity. Compared to commercial nZVI (C-nZVI), BM−RE ZVI was characterized by abundant surface Fe 0 , more reactive crystal planes, and fewer iron vacancies, enabling flexible electron transfer. The reaction rate constants normalized with Fe 0 content ( k Fe 0 ) for removing aqueous Pb, Cr, trichloroethylene (TCE), and florfenicol (FF) increased by 3.3, 2.6, 10.5, and 11.9 times, respectively, as compared to C-nZVI, and the fastest 100 % FF removal was achieved in a real groundwater sample. In addition to its environmental friendliness, BM−RE ZVI was also economically viable according to the environmental friendliness and techno-economic analyses, with an estimated price of 27 k-32 k ¥ ton −1 . These findings provide a new approach for preparing economical and eco-friendly nZVI, which will boost its application in practical pollution remediation
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chunhe Li,Shiwen Du,Congrong Lu,Kuankuan Ren,Qi Wang,Shunyi Shan,Qiang Li,Zebo Fang,Xiudong Li,Weidong Dou
Exploring efficient photocatalysts to facilitate water splitting into green hydrogen (H 2 ) energy is of great significance nowadays. In this work, we successfully synthesized CdS nanoflowers coated by zero-dimensional MMoS 4 (M = Ni, Co, Cu) cocatalysts using a mild two-pot solvothermal method. Notably, 2.5%-NiMoS 4 /CdS catalyst exhibits optimal photocatalytic H 2 evolution from benzyl alcohol aqueous solution under visible-light irradiation, and its photocatalytic H 2 activity (7269.5 μmol·h −1 ·g −1 ) is 10.1 times higher than that of pure CdS (716.6 μmol·h −1 ·g −1 ). Simultaneously, benzyl alcohol can be synergistically converted into benzaldehyde after dehydrogenation . Such excellent photocatalytic performance mainly benefits from the existence of an internal electric field (IEF), which is demonstrated by experimental analysis and density functional theory calculations. And the IEF greatly accelerates the separation of electron-hole pairs during the photocatalytic H 2 evolution process.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yaming Liu,Xinyu Li,Yutian Zhao,Zhenle Hu,Xinrui Zhu,Kemeng Chen,Yuxuan Lu,Guoqiang Liu,Chao Zhi,Yongzhen Wang,Jiaguang Meng,Xiang Li
The H 2 -induced attachment of nanoparticles (NPs) to nanowires (NWs) has become a new method for fabricating Pt-based alloy NWs. However, it is still unclear how the surface structure influences the attachment process. Herein, we introduced Ag, Pd and Rh elements into PtIr alloy to fabricate PtIrM (M = Ag, Pd, Rh) materials with similar compositions but different structure, to investigate the effects of changing the surface structures on the morphologies of the products. The results show that both excessive surface oxidation and the strong anchoring ability of Pt atoms are detrimental to the formation of NWs. Based on the special surface structure, the ethylene glycol oxidation reaction (EGOR) was used as a model catalytic reaction to evaluate the catalytic performance of these materials. The Pt 70 Ir 13 Pd 17 NWs deliver a mass activity of 8.93 A mg −1 , a Faradaic efficiency (FE) for glycolic acid of 96 % and the FE is still above 90 % after 50 hours of stability test, outperforming most previously reported electrocatalysts. Finally, in situ experiments and DFT calculations were used to reveal the reaction route of EGOR, where favorable adsorption in the key intermediate promotes activity, high energy barrier for C-C bond cleavage increases selectivity.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Weizhen Xie,Chenting Yang,Quanwei Deng,Shigang Su,Lu Lin,Xing Tang
The selective hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF) under mild conditions holds great significance for sustainable chemical production. However, this process remains hindered by challenges such as the instability of HMF in aqueous media and the insufficient efficiency of H 2 activation. Herein, a Pd catalyst supported on oxygen-vacancy–enriched MnO x -VC (Pd/MnO x -VC) is developed, featuring highly dispersed Pd/PdO heterostructures with abundant Pd–O–Mn interfacial active sites. Notably, Pd/MnO x -VC offered a high BHMTHF formation rates of 366.5 mol BHMTHF ·mol Pd −1 ·h −1 in water under mild conditions. Moreover, the catalyst was able to efficiently convert both purified and crude HMF at high concentrations (≥ 10 wt%), achieving BHMTHF yields exceeding 90 % in either batch or continuous-flow reactor under low temperatures (30–60 °C), underscoring its potential for industrial application. Mechanistic studies revealed that the relay activation of H 2 over Pd nanoparticles and adjacent Pd–O–Mn sites generates polarized H δ⁺ –H δ⁻ pairs, which primarily contributed to the outstanding activity of Pd/MnO x -VC. This work highlights the importance of interfacial site engineering in designing high-performance catalysts for HMF hydrogenation.
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高影响因子
FUEL
·
2025
·
IF 7.5
Zhiwei Chu,Wenzhe Zhang,Wenhan Zhao,Duo Xu,Zirui He,Kuihua Han,Yingjie Li
H 2 and solid carbon are available through the CH 4 decomposition with Fe-based catalysts. Red mud is a solid waste containing lots of Fe 2 O 3 . In this work, the CeO 2 -doped solid waste-based catalyst pellets were prepared by the extrusion-spheronization method using red mud and calcium carbide slag for catalytic decomposition of CH 4 . The mass ratio of red mud to calcium carbide slag was 1:3. Regeneration of catalyst pellets with carbon deposits was performed by sieving separation and steam gasification. The effects of CeO 2 , catalyst pellet diameter, fluidization velocity, ratio and type of pore forming agent (bagasse, corn cob, horsetail pine, and walnut), ratio of binder (polyvinylpyrrolidone (PVP)), and pellet calcination duration on CH 4 decomposition and regeneration of catalyst pellets were studied in a fluidized bed reactor. The electrochemical performance of the Na-ion battery using the partial solid carbon materials from CH 4 decomposition as the anode materials was evaluated. The heat and mass transfer performance of catalyst pellets in fluidized state is enhanced. The initial CH 4 conversion is 88% in the first catalysis/regeneration cycle at 850 °C with the catalyst pellet diameter of 250–425 µm, calcination duration of 60 min, corn cob addition of 3 wt%, PVP addition of 2 wt% and fluidization velocity of 0.07 m/s. The CO 2 capture by CaO in catalyst pellets during gasification boosts the residual carbon deposits removal. The reversible sodium storage capacity of the Na-ion battery using solid carbon as the carbon-based anode material is 392.0 mAh/g. The CeO 2 -doped solid waste-based catalyst pellets are beneficial to the H 2 production, high-value utilization of solid carbon, and CO 2 capture via CH 4 decomposition and regeneration process.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xiaohui Ma,Jianlin Zhao,Mengyao Ren,Xu An,Nan Jiang,Songbo Li,Ping Bai
The design of non-precious metal H 2 -producing photocatalysts for photocatalytic H 2 production remains research hotspots for addressing energy shortages and ecological pollution. Herein, by two-step hydrothermal method, a novel and noble-metal-free Mn 0.43 Cd 0.57 S/ZnSe S-scheme heterojunction was resoundingly designed and constructed for efficient photocatalytic H 2 production. Morphological tests revealed ZnSe were deposited on the Mn 0.43 Cd 0.57 S to form a tight contact interface. The H 2 evolution performance over optimal Mn 0.43 Cd 0.57 S/ZnSe was 9136.67 μmol·g −1 ·h −1 , which was severally 22.88 and 2.18 times that of pure ZnSe and Mn 0.43 Cd 0.57 S, and even far exceeded the activity of ZnSe/1%Pt. The enhanced performance of H 2 evolution was resulted from the formed S-scheme heterojunction with built-in electric fields, which could optimize the electron migration pathways for improving charge separation efficiency. This work manifests Mn x Cd 1-x S solid solution could be used as a promising non-noble metal cocatalyst to modify ZnSe for efficient photocatalytic H 2 evolution, which can be extended to modify other selenides.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·42970-42981
·
IF 7.8
Ma Chaofan,Su Huiyu,Liu Zhongneng,Zhu Chaoqi,Yang Yazhou,Zeng Dawen
It is crucial to detect hydrogen (H 2 ) release from battery packs to provide early warning of battery thermal runaway. In this article, the hollow octahedral CuO x /TiO 2 were prepared using an efficient MOF template strategy, and nitrogen (N) -doped carbon (C) nanofibers embedded with CuO x /TiO 2 were designed by electrospinning, which were CuO x /TiO 2 @NCFs. The hollow heterojunctions (CuO x /TiO 2 ) formed based on MOF templates can reduce the recombination rate of carriers in TiO 2 , and DFT calculations reveal charge transfer occurring at the heterojunction, with a substantial migration of electrons from TiO 2 to CuO, significantly enhancing the ability of TiO 2 surface to adsorb H 2 . Simultaneously, the nanofibers composed of CuO x /TiO 2 and PAN contain substantial amounts of nitrogen and carbon. The introduced N atoms can activate the adjacent C atoms, the 3D framework constructed from N-doped C nanofibers exhibits extremely strong electron transport capability. At the optimal TiO 2 :PAN ratio of 4.0:1, the sensor achieves the response of 48% toward 10 ppm H 2 , and can detect as low as 20 ppb H 2 at room temperature, which is a potential competitive candidate for monitoring LIBs thermal runaway.
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PubMed
高影响因子
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