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Related Concept Videos

Hydrogen Bonds00:26

Hydrogen Bonds

Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared.
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Related Experiment Video

Updated: May 20, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Sparkling Synergy: Enhancing Hydrogen Evolution with a Mesoporous CoP/FeP Interface.

Alaaldin Adam1, María Isabel Díez-García2, Joan Ramon Morante2

  • 1Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management (IRC-HTCM), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.

ACS Applied Materials & Interfaces
|October 4, 2024
PubMed
Summary
This summary is machine-generated.

Engineered cobalt and iron phosphide (CoP/FeP) electrocatalysts show superior hydrogen evolution reaction (HER) performance. This mesoporous material offers enhanced kinetics and durability for efficient hydrogen production.

Keywords:
clean energyclean fuel technologyenergyrenewable powersustainable energy

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrocatalyst surface and interface engineering are crucial for reaction kinetics.
  • Developing efficient electrocatalysts is key for energy conversion technologies like hydrogen production.

Purpose of the Study:

  • To synthesize and characterize a novel cobalt monophosphide and iron monophosphide (CoP/FeP) electrocatalyst with an effective solid interface.
  • To evaluate the hydrogen evolution reaction (HER) performance of the CoP/FeP electrode compared to individual CoP and FeP.
  • To establish a relationship between theoretical calculations and experimental HER activity.

Main Methods:

  • Synthesis of mesoporous CoP/FeP via phosphidization of mesoporous CoFe2O4.
  • Electrochemical characterization including overpotential, exchange current density, Tafel slopes, electrochemical impedance spectroscopy, and turnover frequency.
  • Density functional theory (DFT) calculations to determine differential hydrogen adsorption energy and Gibbs free energy change.

Main Results:

  • CoP/FeP exhibited superior HER performance with an overpotential of 98 mV vs. 220 mV (FeP) and 265 mV (CoP) at 10 mA cm−2.
  • CoP/FeP demonstrated enhanced redox properties, faster kinetics, reduced impedance, and superior charge transport.
  • Calculations revealed that the CoP-rich CoP/FeP surface has the highest catalytic potential for HER.

Conclusions:

  • The engineered CoP/FeP electrocatalyst with a solid interface and mesoporous surface significantly enhances HER performance and durability.
  • The synergistic effect between CoP and FeP contributes to improved catalytic activity and charge transport.
  • The study establishes a strong correlation between theoretical predictions and experimental results for HER electrocatalysis.