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Atomic reconstruction for realizing stable solar-driven reversible hydrogen storage of magnesium hydride
Researchers demonstrate a single phase Mg2Ni(Cu) alloy via atomic reconstruction to achieve the ideal integration of photothermal and catalytic effects, leading to a 6.1 wt. % H2 reversible capacity with 95 % retention under 3.5 W cm−2.
- Xiaoyue Zhang
- , Shunlong Ju
- & Xuebin Yu
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| Open Access
Experimentally validated design principles of heteroatom-doped-graphene-supported calcium single-atom materials for non-dissociative chemisorption solid-state hydrogen storage
Via the first-principles calculations and experimental verifications, a guiding principle is established to design heteroatom-doped-graphene-supported Ca single-atom carbon nanomaterials for efficient non-dissociative solid-state hydrogen storage.
- Yong Gao
- , Zhenglong Li
- & Hongge Pan
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| Open Access
Highly loaded bimetallic iron-cobalt catalysts for hydrogen release from ammonia
Inexpensive iron catalysts often exhibit low activity in ammonia decomposition due to a strong iron-nitrogen binding energy. Here the authors demonstrate that combining iron with cobalt to form a Fe-Co bimetallic catalyst overcomes this limitation, presenting a promising solution for enhancing ammonia decomposition efficiency.
- Shilong Chen
- , Jelena Jelic
- & Malte Behrens
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| Open Access
Single-crystal ZrCo nanoparticle for advanced hydrogen and H-isotope storage
ZrCo, a promising hydrogen isotope storage material, has poor cyclic storage capacity. Here author reveal a defect-derived disproportionation mechanism and report a nano-single-crystal strategy to comprehensively improve performances.
- Zhenyang Li
- , Shiyuan Liu
- & Jianglan Shui
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| Open Access
Nonredox trivalent nickel catalyzing nucleophilic electrooxidation of organics
A good understanding of the mechanism behind organic electrooxidation is crucial for the development of efficient energy conversion technology. Here, the authors find that trivalent nickel is capable of oxidizing organics through a nucleophilic attack and electron transfer via a non-redox process.
- Yuandong Yan
- , Ruyi Wang
- & Zhigang Zou
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Corrosion-resistant cobalt phosphide electrocatalysts for salinity tolerance hydrogen evolution
Seawater electrolysis for hydrogen production is limited by the poor salinity tolerance of catalysts. CoP was found to repel chlorine while attracting H2O molecules to form a thin layer on the catalyst surface, thus constructing a corrosion-resistant CoP/rGO@Ti catalyst for seawater splitting.
- Xinwu Xu
- , Yang Lu
- & Yibo He
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| Open Access
Synergistic effects of mixing and strain in high entropy spinel oxides for oxygen evolution reaction
Efficient and durable electrocatalysts are essential for boosting oxygen evolution reaction toward hydrogen production. Here, the authors report a combined theoretical and experimental study on high-entropy spinel oxide with element mixing and strains providing superior activity and stability.
- Jihyun Baek
- , Md Delowar Hossain
- & Xiaolin Zheng
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Carbon neutral hydrogen storage and release cycles based on dual-functional roles of formamides
The search for new carbon-based hydrogen storage materials attracts scientists from various disciplines. Now, carbon-neutral hydrogen storage-release is reported based on dual-functional roles of formamides and uses non-noble, Fe-based catalyst.
- Duo Wei
- , Xinzhe Shi
- & Matthias Beller
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Life cycle net energy assessment of sustainable H2 production and hydrogenation of chemicals in a coupled photoelectrochemical device
Integrating green hydrogen production with the generation of valuable chemicals has the potential to increase the competitiveness of the system. Here, the authors quantitatively evaluate the energetic benefit of coupling hydrogen production with the hydrogenation of feedstocks in a photoelectrochemical device.
- Xinyi Zhang
- , Michael Schwarze
- & Fatwa F. Abdi
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Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition
Ruthenium-based materials show promising performance for ammonia decomposition, yet the underlying mechanism remains to be further explored. Here the authors investigate atomically dispersed Ru atoms on polar (111) on MgO facets to show synergistic metal sites in close proximity are required for the stepwise dehydrogenation of ammonia to N2/H2.
- Huihuang Fang
- , Simson Wu
- & Shik Chi Edman Tsang
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| Open Access
Insights into the activity of nickel boride/nickel heterostructures for efficient methanol electrooxidation
Understanding the role of active sites in electrooxidation reactions is important yet challenging. Here, the authors use operando spectroscopies to monitor the effect of methanol concentration on Ni3B/Ni heterostructures during formate production.
- Yanbin Qi
- , Yue Zhang
- & Chunzhong Li
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| Open Access
CO-tolerant RuNi/TiO2 catalyst for the storage and purification of crude hydrogen
Efficient storage of crude hydrogen, through toluene hydrogenation to methylcyclohexane, is often inhibited by CO impurities. Here, the authors develop a RuNi/TiO2 catalyst which avoids deactivation through promoting simultaneous CO methanation.
- Zhaohua Wang
- , Chunyang Dong
- & Ding Ma
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Article
| Open Access
Identifying the nature of the active sites in methanol synthesis over Cu/ZnO/Al2O3 catalysts
Methanol synthesis has a high potential for global CO2 reduction. Here, the authors identify the oxidation state of the zinc sites on the metallic copper particles as partially positive for an industrial Cu/ZnO/Al2O3 catalyst under high-pressure reaction conditions.
- Daniel Laudenschleger
- , Holger Ruland
- & Martin Muhler
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Reversible interconversion between methanol-diamine and diamide for hydrogen storage based on manganese catalyzed (de)hydrogenation
The development of cost-effective, sustainable, and efficient catalysts for liquid organic hydrogen carrier systems is a significant goal. Herein, authors present a system based on manganese catalysis with a theoretical H2 capacity of 5.3 wt% and high selectivity for the dehydrogenation reaction.
- Zhihui Shao
- , Yang Li
- & Qiang Liu
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Nanocomposite electrodes for high current density over 3 A cm−2 in solid oxide electrolysis cells
High-temperature solid oxide electrolysis cells are a promising technology for energy conversion, but higher current density is needed to increase efficiency. Here the authors design nanocomposite electrodes to improve electronic and ionic conductivity to achieve a high current density.
- Hiroyuki Shimada
- , Toshiaki Yamaguchi
- & Yoshinobu Fujishiro
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Highly efficient decomposition of ammonia using high-entropy alloy catalysts
Alloys are important materials for catalysis but are usually limited by miscibility gaps present in their phase diagrams. Here the authors break this limitation by developing high-entropy alloy catalysts made of five earth-abundant elements and demonstrate great catalytic enhancements for ammonia decomposition.
- Pengfei Xie
- , Yonggang Yao
- & Chao Wang
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| Open Access
Isolating hydrogen in hexagonal boron nitride bubbles by a plasma treatment
Hexagonal boron nitride (hBN) is a two-dimensional material with wide band gap and high thermal and chemical stability. Here the authors demonstrate the formation and trapping of hydrogen gas bubbles in hBN interlayers upon plasma treatment, promising for extracting and storing hydrogen.
- Li He
- , Huishan Wang
- & Xiaoming Xie
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| Open Access
Exceptional hydrogen storage achieved by screening nearly half a million metal-organic frameworks
Considering the large number of existing synthesised and hypothesised metal-organic frameworks, determining which materials perform best for given applications remains a challenge. Here, the authors screen the usable hydrogen uptake capacities of nearly 500,000 MOFs, and find that three frameworks outperform the current record-holder.
- Alauddin Ahmed
- , Saona Seth
- & Donald J. Siegel
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| Open Access
Metal-hydrogen systems with an exceptionally large and tunable thermodynamic destabilization
Tailoring the thermodynamics of metal-hydrogen interactions is crucial for tuning the properties of metal hydrides but remains difficult to control. Here, the authors create an yttrium hydrogen sensor sensitive to pressure changes of up to four orders of magnitude by adding zirconium into the Y lattice.
- Peter Ngene
- , Alessandro Longo
- & Bernard Dam
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| Open Access
Oxygen-rich microporous carbons with exceptional hydrogen storage capacity
Hydrogen is attractive as a clean fuel for motor vehicles and porous carbons represent promising hydrogen storage materials. Here, Mokaya and colleagues incorporate oxygen-rich functional groups into porous carbons with high microporosity, showing that such materials exhibit significantly enhanced H2 storage capacity.
- L. Scott Blankenship
- , Norah Balahmar
- & Robert Mokaya
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| Open Access
Direct catalytic hydrogenation of CO2 to formate over a Schiff-base-mediated gold nanocatalyst
Bicarbonate reduction is a bottleneck step of the CO2 hydrogenation to formic acid in alkaline solution. Here, the authors show a highly active Schiff-base-modified gold nanocatalyst for the efficient reduction of CO2 to formic acid under relatively mild conditions.
- Qinggang Liu
- , Xiaofeng Yang
- & Tao Zhang
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| Open Access
Temperature-regulated guest admission and release in microporous materials
Regulating guest access and release in porous materials remains an important goal. Here, May and colleagues elucidate the mechanism by which guest admission can be temperature-regulated in typical microporous materials, and experimentally exploit this process to achieve appreciable and reversible hydrogen storage.
- Gang (Kevin) Li
- , Jin Shang
- & Eric F. May
Isotope engineering achieved by local coordination design in Ti-Pd co-doped ZrCo-based alloys