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Electrodeposition

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...

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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

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Published on: June 21, 2017

Defect-Promoted Ni-Based Layer Double Hydroxides with Enhanced Deprotonation Capability for Efficient Biomass

Yuwei Yang¹, William Hadinata Lie¹, Raymond R Unocic²

¹School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.

Advanced Materials (Deerfield Beach, Fla.)

|September 21, 2023

Summary

This study reveals how tuning metal hydroxide catalysts

Keywords:

Ni-based layered double hydroxide biomass electrooxidation defective engineering electron transfer processes metal-oxygen covalency proton transfer processes structural evolution

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Area of Science:

Electrocatalysis
Materials Science
Renewable Energy

Background:

Nickel-based hydroxides are effective electrocatalysts for biomass oxidation.
Optimizing active sites is crucial for efficient anodic reactions.
Understanding deprotonation is key to catalyst performance.

Purpose of the Study:

To establish a proportional relationship between catalyst deprotonation propensity and 5-hydroxymethylfurfural (5-HMF) oxidation efficiency.
To engineer ultrathin layer-double hydroxides (UT-LDHs) for enhanced biomass electrooxidation.
To suppress the oxygen evolution reaction (OER) while promoting value-added chemical production.

Main Methods:

Density functional theory (DFT) simulations.
Atomic-scale characterizations including in situ synchrotron diffraction and spectroscopy.
Tuning metal-oxygen covalency via defect engineering and M3+ co-chemistry in UT-LDHs.

Main Results:

A direct correlation between deprotonation capability and Faradaic efficiency (FE) for 5-HMF to 2,5-furandicarboxylic acid (FDCA) was identified.
NiMn UT-LDHs achieved an ultrahigh FE_FDCA of 99% at 1.37 V vs RHE.
NiMn UT-LDHs maintained high FE_FDCA (92.7%) at 1.52 V, outperforming NiFe UT-LDHs (49.5%).

Conclusions:

Electronic engineering of deprotonation behavior in metal hydroxides is a universal strategy for modulating competing anodic reactions in biomass electrolysis.
Ni-O and Mn-O dual active sites in NiMn UT-LDHs facilitate HMF electrooxidation, with Mn-OH deprotonation crucial for selectivity.
The findings are translatable to various biomass substrates, advancing sustainable chemical production.