Ligament size-dependent electrocatalytic activity of nanoporous Ag network for CO2 reduction

2018 ◽  
Vol 210 ◽  
pp. 289-299 ◽  
Author(s):  
Wanfeng Yang ◽  
Wensheng Ma ◽  
Zhonghua Zhang ◽  
Chuan Zhao
Keyword(s):  
Size Effects ◽  
Electrocatalytic Activity ◽  
Co2 Reduction ◽  
Size Dependent ◽  
Ligament Size

Nanoporous Ag (ligament size: 21 nm) exhibits superior CO selectivity and activity, confirming strong ligament size effects on CO2 reduction.

scholarly journals Size Dependent CO2 Reduction Activity of Ag Nanoparticle Electrocatalysts

2021 ◽  
Author(s):  
Xingyi Deng ◽  
Dominic Alfonso ◽  
Thuy-Duong Nguyen-Phan ◽  
Douglas Kauffman
Keyword(s):  
Active Sites ◽  
Density Functional ◽  
Particle Diameter ◽  
Small Diameter ◽  
Co2 Reduction ◽  
High Population ◽  
Structure Property ◽  
Size Dependent ◽  
Catalyst Utilization ◽  
Ag Catalysts

Abstract Coinage metals (Au, Cu and Ag) are state-of-the-art electrocatalysts for the CO2 reduction reaction (CO2RR). Size-dependent CO2RR activity of Au and Cu has been studied, and increased H2 evolution reaction (HER) activity is expected for small catalyst particles with high population of undercoordinated corner sites. A similar consensus is still lacking for Ag catalysts because the ligands and stabilizers typically used to control particle synthesis can block specific active sites and mask inherent structure-property trends. This knowledge gap is problematic because increased performance and catalyst utilization are still needed to improve economic viability. We combined density functional theory, microkinetic modeling, and experiment to demonstrate a strong size-dependence for pristine Ag particles in the sub-10 nm range. Small diameter particles with a high population of Ag edge sites were predicted to favor HER, whereas CO2RR selectivity increased towards that of bulk Ag for larger diameter particles as the population of Ag(100) surface sites grew. Experimental results validated these predictions and we identified an optimal particle diameter of 8-10 nm that balanced selectivity and activity. Particles below this diameter suffered from poor selectivity, while larger particles demonstrated bulk-like activity and reduced catalyst utilization. These results demonstrate the size-dependent CO2RR activity of pristine Ag catalysts and will help guide future development efforts.

Identification of a new substrate effect that enhances the electrocatalytic activity of dendritic tin in CO2 reduction

2018 ◽  
Vol 20 (8) ◽  
pp. 5936-5941 ◽  
Author(s):  
Ying Zhang ◽  
Xiaolong Zhang ◽  
Alan M. Bond ◽  
Jie Zhang
Keyword(s):  
Electrocatalytic Activity ◽  
Co2 Reduction ◽  
Substrate Effect ◽  
Enhanced Selectivity

A Sn electrocatalyst for CO2 reduction to formate with enhanced selectivity has been developed based on a new substrate effect.

Carbon based copper(II) phthalocyanine catalysts for electrochemical CO2 reduction: Effect of carbon support on electrocatalytic activity

Carbon ◽  
2020 ◽  
Vol 168 ◽  
pp. 245-253 ◽  
Author(s):  
Naziah Mohamad Latiff ◽  
Xiaoxu Fu ◽  
Dara Khairunnisa Mohamed ◽  
Andrei Veksha ◽  
Murni Handayani ◽  
...  
Keyword(s):  
Electrocatalytic Activity ◽  
Co2 Reduction ◽  
Carbon Support ◽  
Electrochemical Co2 Reduction ◽  
Reduction Effect ◽  
Carbon Based

Size-Dependent Electrocatalytic Activity of Free Gold Nanoparticles for the Glucose Oxidation Reaction

ChemPhysChem ◽  
2016 ◽  
Vol 17 (10) ◽  
pp. 1454-1462 ◽  
Author(s):  
Seydou Hebié ◽  
Teko W. Napporn ◽  
Cláudia Morais ◽  
K. Boniface Kokoh
Keyword(s):  
Gold Nanoparticles ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Glucose Oxidation ◽  
Size Dependent ◽  
Free Gold ◽  
Glucose Oxidation Reaction

Size-dependent role of gold in g-C3N4/BiOBr/Au system for photocatalytic CO2 reduction and dye degradation

2016 ◽  
Vol 157 ◽  
pp. 406-414 ◽  
Author(s):  
Yang Bai ◽  
Ting Chen ◽  
Pingquan Wang ◽  
Li Wang ◽  
Liqun Ye ◽  
...  
Keyword(s):  
Dye Degradation ◽  
Co2 Reduction ◽  
Size Dependent

A Dimensional Analysis Model for Geometric Size Effects of Single Crystals

2010 ◽  
Vol 97-101 ◽  
pp. 2184-2187
Author(s):  
Xiao Liang Chen ◽  
Shun Hong Lin ◽  
Zuan Tian
Keyword(s):  
Yield Strength ◽  
Single Crystals ◽  
Dimensional Analysis ◽  
Size Effects ◽  
Surface Effect ◽  
Analysis Model ◽  
Size Dependent ◽  
Nano Scale ◽  
Geometric Size ◽  
Metal Single Crystals

Due to the relatively high surface-to-volume ratio, the surface effect can be significant for micro/nano-scale materials. This paper focuses on geometric size-dependent strength mechanisms of micro/nano-scale metal single crystals. A dimensional analysis model relating surface energy with the geometric size-dependent yield strength is presented and compared with results of microscale uniaxial compression tests on Ni and Au single crystals. The results indicate this model can predict the geometric size effects on the yield strength of micro/nano-scale metal single crystals.

scholarly journals SIZE-DEPENDENT ELASTIC MODULUS AND FRACTURE TOUGHNESS OF THE NANOFILM WITH SURFACE EFFECTS

2008 ◽  
Vol 15 (05) ◽  
pp. 599-603 ◽  
Author(s):  
JIAN-GANG GUO ◽  
LI-JUN ZHOU ◽  
YA-PU ZHAO
Keyword(s):  
Fracture Toughness ◽  
Elastic Modulus ◽  
Surface Energy ◽  
Size Effects ◽  
Interatomic Potential ◽  
Effective Elastic Modulus ◽  
Surface Effects ◽  
Surface Relaxation ◽  
Ideal Crystal ◽  
Size Dependent

The effective elastic modulus and fracture toughness of the nanofilm were derived with the surface relaxation and the surface energy taken into consideration by means of the interatomic potential of an ideal crystal. The size effects of the effective elastic modulus and fracture toughness were discussed when the thickness of the nanofilm was reduced. And the dependence of the size effects on the surface relaxation and surface energy was also analyzed.

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