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Related Concept Videos

Catalysis02:50

Catalysis

26.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.9K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

5.8K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.8K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

11.3K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.3K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.1K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.1K

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Updated: Jun 25, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Nickel adsorbed algae biochar based oxygen reduction reaction catalyst.

B Neethu1, K Ihjas2, I Chakraborty3

  • 1Department of Civil Engineering, Indian Institute of Technology Kharagpur 721302, India; Kerala State Council for Science, Technology and Environment (KSCSTE), Sasthrabhavan, Pattom, Thiruvananthapuram 69500, India.

Bioelectrochemistry (Amsterdam, Netherlands)
|May 31, 2024
PubMed
Summary

Researchers developed a low-cost catalyst from microalgae and nickel to boost oxygen reduction in bioelectrochemical systems. This innovation enhances wastewater treatment and energy generation efficiency using microbial carbon-capture cells.

Keywords:
BiocharBiosorptionCatalystChlorella sp.Microbial Fuel Cell

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Area of Science:

  • Environmental Science
  • Electrochemistry
  • Biotechnology

Background:

  • Bioelectrochemical systems (BES) offer promising wastewater treatment and energy conversion.
  • Scaling up BES is hindered by slow oxygen reduction reactions (ORR) and costly catalysts.

Purpose of the Study:

  • To develop a cost-effective, eco-friendly ORR catalyst using microalgae.
  • To enhance the performance of microbial carbon-capture cells (MCCs).

Main Methods:

  • Synthesized nickel-adsorbed algal biochar (NAB) via biosorption.
  • Utilized NAB as a cathode catalyst in an MCC.
  • Investigated the effect of nickel concentration on biosorption capacity.

Main Results:

  • Biosorption capacity increased from 3 to 32 mg/g with rising Ni2+ concentration.
  • MCC with NAB catalyst showed 3.5x higher power density (4.69 Wm-3) than commercial activated carbon.
  • Achieved 82% organic matter removal and simultaneous algal biomass production.

Conclusions:

  • NAB is an efficient, low-cost cathode catalyst for MCCs.
  • This method utilizes waste streams for catalyst synthesis.
  • The catalyst significantly improves MCC performance for wastewater treatment and energy generation.