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A Scalable Balz-Schiemann Reaction Protocol in a Continuous Flow Reactor
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Co

Ying Liu1, Fei Yang1, Wei Qin1

  • 1State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, People's Republic of China.

Journal of Colloid and Interface Science
|September 14, 2018
PubMed
Summary
This summary is machine-generated.

A novel Co2P@NiCo2O4 electrocatalyst efficiently performs hydrogen and oxygen evolution reactions across all pH levels. This bifunctional catalyst shows excellent stability and low overpotential in alkaline media for water splitting.

Keywords:
Bi-functional electrocatalystCo(2)P@NiCo(2)O(4)OverpotantialOxides/hydroxides species

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Developing efficient electrocatalysts for water splitting is crucial for renewable energy technologies.
  • Bifunctional electrocatalysts capable of both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are highly sought after.
  • Existing catalysts often suffer from poor stability or limited pH range applicability.

Purpose of the Study:

  • To fabricate and characterize a novel Co2P@NiCo2O4 bifunctional electrocatalyst.
  • To evaluate the electrocatalytic performance of Co2P@NiCo2O4 for HER and OER in acidic, neutral, and alkaline media.
  • To investigate the role of anchored Co2P in enhancing the performance and stability of NiCo2O4.

Main Methods:

  • Synthesis of Co2P@NiCo2O4 composite electrocatalyst.
  • Electrochemical characterization including cyclic voltammetry and chronoamperometry.
  • Evaluation of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance across a wide pH range (0-14).

Main Results:

  • Co2P@NiCo2O4 exhibits excellent bifunctional activity for both HER and OER.
  • In alkaline media, OER achieved a current density of 10 mA cm⁻² at an exceptionally low overpotential of 170 mV.
  • The catalyst demonstrated stable water splitting for nearly 30 hours.
  • Anchored Co2P enhanced the electrochemical performance and acidic media tolerance of NiCo2O4.
  • In-situ oxidation of Co2P to active oxides/hydroxides species was observed during electrocatalysis.

Conclusions:

  • The Co2P@NiCo2O4 composite is a highly effective bifunctional electrocatalyst for water splitting.
  • The catalyst demonstrates remarkable performance and stability over a broad pH range, attributed to the synergistic effect between Co2P and NiCo2O4.
  • This material holds significant promise for efficient and durable electrochemical energy conversion applications.