Fine‐Tuning Intrinsic Strain in Penta‐Twinned Pt–Cu–Mn Nanoframes Boosts Oxygen Reduction Catalysis

2020 ◽  
Vol 30 (11) ◽  
pp. 1910107 ◽  
Author(s):  
Yuchen Qin ◽  
Wenlong Zhang ◽  
Kai Guo ◽  
Xiaobiao Liu ◽  
Jiaqi Liu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Fine Tuning ◽  
Intrinsic Strain

Monodispersed Co in Mesoporous Polyhedrons: Fine-tuning of ZIF-8 Structure with Enhanced Oxygen Reduction Activity

2017 ◽  
Vol 251 ◽  
pp. 498-504 ◽  
Author(s):  
Syed Shoaib Ahmad Shah ◽  
Lishan Peng ◽  
Tayyaba Najam ◽  
Chao Cheng ◽  
Guangping Wu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Fine Tuning ◽  
Reduction Activity

scholarly journals Fine tuning of the catalytic effect of a metal-free porphyrin on the homogeneous oxygen reduction

2011 ◽  
Vol 47 (19) ◽  
pp. 5446 ◽  
Author(s):  
Antonín Trojánek ◽  
Jan Langmaier ◽  
Jakub Šebera ◽  
Stanislav Záliš ◽  
Jean-Michel Barbe ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Catalytic Effect ◽  
Fine Tuning ◽  
Metal Free

scholarly journals Towards understanding the active sites for the ORR in N-doped carbon materials through fine-tuning of nitrogen functionalities: an experimental and computational approach

2019 ◽  
Vol 7 (42) ◽  
pp. 24239-24250 ◽  
Author(s):  
Javier Quílez-Bermejo ◽  
Manuel Melle-Franco ◽  
Emilio San-Fabián ◽  
Emilia Morallón ◽  
Diego Cazorla-Amorós
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
Carbon Materials ◽  
Reduction Reaction ◽  
Computational Approach ◽  
Fine Tuning

The design of advanced N-doped carbon materials towards oxygen reduction reaction (ORR) catalysis is only possible if the nature of the active sites is fully understood.

Tunable intrinsic strain in two-dimensional transition metal electrocatalysts

Science ◽  
2019 ◽  
Vol 363 (6429) ◽  
pp. 870-874 ◽  
Author(s):  
Lei Wang ◽  
Zhenhua Zeng ◽  
Wenpei Gao ◽  
Tristan Maxson ◽  
David Raciti ◽  
...  
Keyword(s):  
Transition Metal ◽  
Density Functional ◽  
Compressive Strain ◽  
Density Functional Theory Calculations ◽  
Surface Strain ◽  
Fine Tuning ◽  
Two Dimensional ◽  
Level Control ◽  
Surface Stresses ◽  
Intrinsic Strain

Tuning surface strain is a powerful strategy for tailoring the reactivity of metal catalysts. Traditionally, surface strain is imposed by external stress from a heterogeneous substrate, but the effect is often obscured by interfacial reconstructions and nanocatalyst geometries. Here, we report on a strategy to resolve these problems by exploiting intrinsic surface stresses in two-dimensional transition metal nanosheets. Density functional theory calculations indicate that attractive interactions between surface atoms lead to tensile surface stresses that exert a pressure on the order of 105atmospheres on the surface atoms and impart up to 10% compressive strain, with the exact magnitude inversely proportional to the nanosheet thickness. Atomic-level control of thickness thus enables generation and fine-tuning of intrinsic strain to optimize catalytic reactivity, which was confirmed experimentally on Pd(110) nanosheets for the oxygen reduction and hydrogen evolution reactions, with activity enhancements that were more than an order of magnitude greater than those of their nanoparticle counterparts.

Rational prediction of multifunctional bilayer single atom catalysts for the hydrogen evolution, oxygen evolution and oxygen reduction reactions

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20413-20424
Author(s):  
Riming Hu ◽  
Yongcheng Li ◽  
Fuhe Wang ◽  
Jiaxiang Shang
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Single Atom ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

Bilayer single atom catalysts can serve as promising multifunctional electrocatalysts for the HER, ORR, and OER.

Fine-Tuning Futures

ASHA Leader ◽  
2017 ◽  
Vol 22 (6) ◽  
Author(s):  
Christi Miller
Keyword(s):  
Fine Tuning

Food Safety Security: A new Concept for Enhancing Food Safety Measures

2012 ◽  
Vol 82 (3) ◽  
pp. 216-222 ◽  
Author(s):  
Venkatesh Iyengar ◽  
Ibrahim Elmadfa
Keyword(s):  
Food Safety ◽  
Hazard Analysis ◽  
Warning System ◽  
Shared Responsibility ◽  
Fine Tuning ◽  
Strategic Action ◽  
Surveillance Network ◽  
Measurement Systems ◽  
Critical Control Points ◽  
The Impact

The food safety security (FSS) concept is perceived as an early warning system for minimizing food safety (FS) breaches, and it functions in conjunction with existing FS measures. Essentially, the function of FS and FSS measures can be visualized in two parts: (i) the FS preventive measures as actions taken at the stem level, and (ii) the FSS interventions as actions taken at the root level, to enhance the impact of the implemented safety steps. In practice, along with FS, FSS also draws its support from (i) legislative directives and regulatory measures for enforcing verifiable, timely, and effective compliance; (ii) measurement systems in place for sustained quality assurance; and (iii) shared responsibility to ensure cohesion among all the stakeholders namely, policy makers, regulators, food producers, processors and distributors, and consumers. However, the functional framework of FSS differs from that of FS by way of: (i) retooling the vulnerable segments of the preventive features of existing FS measures; (ii) fine-tuning response systems to efficiently preempt the FS breaches; (iii) building a long-term nutrient and toxicant surveillance network based on validated measurement systems functioning in real time; (iv) focusing on crisp, clear, and correct communication that resonates among all the stakeholders; and (v) developing inter-disciplinary human resources to meet ever-increasing FS challenges. Important determinants of FSS include: (i) strengthening international dialogue for refining regulatory reforms and addressing emerging risks; (ii) developing innovative and strategic action points for intervention {in addition to Hazard Analysis and Critical Control Points (HACCP) procedures]; and (iii) introducing additional science-based tools such as metrology-based measurement systems.

Sign in / Sign up

Export Citation Format

Share Document