Coupling acid catalysis and selective oxidation over MoO3-Fe2O3 for chemical looping oxidative dehydrogenation of propane

Wang, Xianhui; Chen, Pei; Zhao, Zhi‐Jian; Chen, Sai; Li, Xinyu; Sun, Jiachen; Song, Hongbo; Sun, Guodong; Wang, Wei; Chang, Xin; Zhang, Xianhua; Gong, Jinlong

doi:10.1038/s41467-023-37818-w

Cited by 32 publications

(14 citation statements)

References 68 publications

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“…These dispersed active sites play a crucial role in facilitating the activation of reactant species, significantly promoting reaction kinetics. 54,55 Oh et al explored perovskite-…”

Section: Nanoscaled Active Sitesmentioning

confidence: 99%

“…Another application of nanomaterials in chemical looping involves the dispersion of nanoscaled active sites on microsized oxygen carriers. These dispersed active sites play a crucial role in facilitating the activation of reactant species, significantly promoting reaction kinetics. , Oh et al explored perovskite-structured La 0.6 Ca 0.4 Fe 0.95 M 0.05 O 3−δ (M = Ni, Co, Ni–Co) as the oxygen carrier for chemical looping CO 2 splitting (CO 2 -oxidation, CH 4 -reduction), as shown in Figure a . The Ni–Co doped carrier exhibited a 6-fold reactivity improvement over the bare sample due to Fe-Ni-Co alloy nanoparticle formation in the reducing environment, as shown in Figure b.…”

Section: Nanoscaled Carriers For Enhanced Reactivity and Selectivity ...mentioning

confidence: 99%

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Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges

Sunny,

Meng,

Kumar

et al. 2023

Acc. Chem. Res.

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Conspectus Climate change poses unprecedented challenges, demanding efforts toward innovative solutions. Amid these efforts, chemical looping stands out as a promising strategy, attracting attention for its CO2 capture prowess and versatile applications. The chemical looping approach involves fragmenting a single reaction, often a redox reaction, into multiple subreactions facilitated by a carrier, frequently a metal oxide. This innovative method enables diverse chemical transformations while inherently segregating products, enhancing process flexibility, and fostering autothermal properties. An intriguing facet of this novel technique lies in its capacity for CO2 utilization in processes like dry reforming and gasification of carbon-based feeds such as natural gas and biomass. Central to the success of chemical looping technology is a profound understanding of the intricacies of redox chemistry within these processes. Notably, nanoscaled oxygen carriers have proven effective, characterized by their extensive surface area and customizable structure. These carriers hold substantial promise, enabling reactions under milder conditions. This Account offers a concise overview of the mechanisms, benefits, opportunities, and challenges associated with nanoscaled carriers in chemical looping applications, with a focus on CO2 utilization. We delve into the nuances of redox chemistry, shedding light on ionic diffusion and oxygen vacancytwo key elements that are crucial in designing oxygen carriers. This discussion extends to nanospecific factors such as the particle size effect and gas diffusivity. Through the application of density functional theory simulations, insights are drawn regarding the impact of nanoparticle size on syngas production in chemical looping. Interestingly, nanosized iron oxide (Fe2O3) carriers exhibit elevated syngas selectivity and constrained CO2 formation at the nanoscale. Moreover, the reactivity enhancement of mesoporous SBA-16 supported Fe2O3 over mesoporous SBA-15 supported Fe2O3 is elucidated through Monte Carlo simulations that emphasize the superiority of the 3-dimensional interconnected porous network of SBA-16 in enhancing gas diffusion, thereby amplifying reactivity compared to the 2-dimensional SBA-15. Furthermore, we explore prevalent nanoscaled carriers, focusing on their amplified performance in CO2 utilization schemes. These encompass the integration of nanoparticles with mesoporous supports to enhance surface area, the adoption of nanoscale core–shell architectures to enhance diffusion, and the dispersion of nanoscaled active sites on microsized carriers to accelerate reactant activation. Notably, our mesoporous-supported Fe2O3 nanocarrier facilitates methane dissociation and oxidation by reducing energy barriers, thereby promoting methane conversion. The Account proceeds to outline key challenges and prospects for nanoscaled carriers in chemical looping, concluding with a glance into future research directions. We also shine a spotlight on our research group’s efforts in innovati...

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“…These dispersed active sites play a crucial role in facilitating the activation of reactant species, significantly promoting reaction kinetics. 54,55 Oh et al explored perovskite-…”

Section: Nanoscaled Active Sitesmentioning

confidence: 99%

Section: Nanoscaled Carriers For Enhanced Reactivity and Selectivity ...mentioning

confidence: 99%

Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges

Sunny,

Meng,

Kumar

et al. 2023

Acc. Chem. Res.

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“…As for high-valent Mo doping, in addition to the advantages mentioned above for enhancing the electrochemical performance of MnO 2 , it can also adjust the electronic structure of Mn and form a strong Mo-O bond, thus stabilizing the lattice oxygen and further improving the structural stability of cathode materials in the cycle process. [15] Therefore, heteroatom doping MnO 2 can dramatically improve the electrochemical performance of storing Zn 2+ for Zn//MnO 2 batteries.…”

Section: Introductionmentioning

confidence: 99%

Cross‐Doped Mn/Mo Oxides with Core‐Shell Structures Designed by a Self‐Template Strategy for Durable Aqueous Zinc‐Ion Batteries

Wang

Guo

et al. 2023

Adv Funct Materials

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Manganese oxide as the star cathode material of aqueous zinc ion batteries is vigorously developed because of its environmental protection, outstanding theoretical capacity, and high voltage. However, severe Jahn–Teller distortion of trivalent Mn has detrimental effect on cyclic stability. Herein, 1D core‐shell bimetal oxide with cross‐doping of heteroatom is successfully designed by self‐template method via one‐step hydrothermal reaction. Specifically, the thick shell of Mo‐doped α‐MnO2 with increased nanopores, expanded lattice spacing, and high oxidation state not only contributes high capacity but also suppresses the lattice distortion due to the doping of high‐valent Mo6+; While the thin core of Mn‐doped MoO3 nanobelt supplies a shaped template, important Mo source, and improved conductive path. Therefore, this composite exhibits a superior capacity of 366.2 mAh g−1 at 0.2 A g−1 and 100% capacity retention after 100 cycles, which effectively increases to 4.1 times from 1.5 times of pure α‐MnO2 based battery. Besides promoting the electrochemical performance in coin‐cell batteries, composite materials also balance the electrochemical and mechanical performances in flexible micro‐batteries with area energy density of 261.2 µWh cm−2. Therefore, this synergetic self‐template and cross‐doping strategy can extend to the material design of other high‐performance metal oxides for energy storage application.

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“…[ 15,16 ] Among structural factors, interfacial interactions should play a key role, as the metal‐support interactions occur on the basis of direct contact with the active nanoparticles with supports. [ 17,18 ] Therefore, the catalytic activity and stability of Ni‐based catalysts for SRE can be promoted by strengthening the metal‐support interaction, providing a synergistic effect between the support and the Ni nanoparticles. [ 19,20 ] Parastaev et al.…”

Section: Introductionmentioning

confidence: 99%

Modulating Mxene‐Derived Ni‐Mo_m‐Mo_2‐mTiC₂T_x Structure for Intensified Low‐Temperature Ethanol Reforming

Shi,

Zhang,

et al. 2023

Advanced Energy Materials

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The technology of steam reforming of bioethanol has drawn great attention to green hydrogen production. However, catalyst deactivation has always been a significant obstacle to its applications. Here, a series of yNi/Mo2TiC2Tx (yNi/MTC) materials are tailored as robust catalysts for highly efficient long‐term ethanol reforming. The results reveal that hydrogen utilization efficiency of up to 95.6% and almost total ethanol conversion can be achieved at 550 °C using a 10Ni/MTC‐72h catalyst. Moreover, this catalyst has remarkable stability without obvious deactivation after 100 h of bioethanol reforming, which can be attributed to the formation of a Ni─Mo alloy and the strong interaction of the Ni‐Mom‐Mo2‐mTiC2Tx structure. The FTIR‐MS studies demonstrate the superiority of the 10Ni/MTC‐72h catalyst for reinforcing low‐temperature bioethanol activation, as verified by the faster conversion of acetate species than with Ni/Al2O3. The adsorption energies of ethanol on the surface of Ni (−1.07 eV) and Ni/MTC (−1.46 eV) are compared by density functional theory calculations and show the superiority of the Ni/MTC catalyst for activating ethanol during steam reforming. This study provides new implications for highly stabilized Ni‐Mom‐Mo2‐mTiC2Tx construction, which is expected to substantially promote the development and application of bioethanol‐to‐hydrogen production technologies.

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Coupling acid catalysis and selective oxidation over MoO3-Fe2O3 for chemical looping oxidative dehydrogenation of propane

Cited by 32 publications

References 68 publications

Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges

Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges

Cross‐Doped Mn/Mo Oxides with Core‐Shell Structures Designed by a Self‐Template Strategy for Durable Aqueous Zinc‐Ion Batteries

Modulating Mxene‐Derived Ni‐Mo_m‐Mo_2‐mTiC₂T_x Structure for Intensified Low‐Temperature Ethanol Reforming

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Coupling acid catalysis and selective oxidation over MoO3-Fe2O3 for chemical looping oxidative dehydrogenation of propane

Cited by 32 publications

References 68 publications

Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges

Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges

Cross‐Doped Mn/Mo Oxides with Core‐Shell Structures Designed by a Self‐Template Strategy for Durable Aqueous Zinc‐Ion Batteries

Modulating Mxene‐Derived Ni‐Mom‐Mo2‐mTiC2Tx Structure for Intensified Low‐Temperature Ethanol Reforming

Contact Info

Product

Resources

About

Modulating Mxene‐Derived Ni‐Mo_m‐Mo_2‐mTiC₂T_x Structure for Intensified Low‐Temperature Ethanol Reforming