Mulatu Birhanu

7 Questions 8 Answers 0 Followers

Questions related from Mulatu Birhanu

Does size of metal particle always decrease with increasing of capping agent to any amount?

In the preparation of metal nanoparticle the particle size decrease with increasing capping (PVP) agent up to some value, but the size of the particle increase after adding more capping agent....

12 December 2018 5,943 4 View

I am using PVP as a capping agent for nanoparticle preparation. How I remove PVP after formation of nanoparticle, which is supported by C material?

I am using PVP as a capping agent for nanoparticle preparation. How can I remove PVP after formation of nanoparticle, which is supported by carbon material? Thanks!

03 March 2018 7,516 5 View

I analyzed the L2 and L3 edge of AuCu nanoparticles using Au foil as a reference for Au nanoparticle. My Au NP intensity is higher than Au foil. Why?

For L2 and L3 edge analysis of Au from AuCu alloy the intensity of my Au nano-particle is higher than the reference (Au foil) it is a little strange for me. Any one reason out this case? Thanks a lot!

10 October 2017 590 2 View

What is the advantages of non-porous substrates over porous one for the same catalysts in electro-oxidation of glycerol? Any one help me, thank you

Is there a possibility that efficiency of electro-oxidation would better on flat/non-porous substrate than porous substrate for the same catalyst? I used relatively non-porous substrate for my...

06 June 2017 1,379 2 View

Must the geometrical surface area of the working electrode(sample) be less than electrochemical surface area?

I determine the surface area of my electrode using Randles Sevcik equation, however this surface area is less than the geometrical/physical surface area of the electrode. What is this means? Does...

12 December 2016 5,654 11 View

Is that using high number cycle during electrodeposition of metals via cyclic voltammetry always give high amount metals deposited?

I am depositing Ni on the home made electrode/substrate via cyclic voltammetry. During deposition at high number of cycles some white thing(a big suspension) is releasing from the substrate. Is...

09 September 2016 746 11 View

What is the main purpose of using counter electrode in electro-oxidation reaction?

Short answer

03 March 2016 521 0 View