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Related Concept Videos

Catalysis02:50

Catalysis

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.

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Related Experiment Video

Updated: Jun 12, 2026

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
06:32

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

Engineering Synergistic Pd-Ni Co-Modified System for Highly Efficient Hydrogen Sensing.

Beixi An1, Yeong Jae Kim2, Jiaqi Yan1

  • 1School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.

ACS Sensors
|June 10, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a new palladium-nickel oxide (Pd-NiO) modified tungsten oxide (WO3) sensor for enhanced hydrogen detection. The novel sensor offers high sensitivity and selectivity at low temperatures, improving safety in hydrogen applications.

Keywords:
WO3co-modified systemgas sensorhydrogenmachine learning

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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase

Published on: December 4, 2017

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Sensor Technology

Background:

  • Hydrogen sensors are crucial for safety in hydrogen production, storage, and transport.
  • Palladium-based sensors offer good hydrogen selectivity but suffer from Pd oxidation and agglomeration, degrading performance.
  • Developing sensors with low operating temperatures, high sensitivity, and selectivity remains a key challenge.

Purpose of the Study:

  • To develop a novel bimetallic sensor using palladium-nickel oxide (Pd-NiO) co-modified WO3 nanospheres.
  • To enhance hydrogen sensing performance, particularly at low operating temperatures.
  • To investigate the synergistic effects of NiO doping on Pd-WO3 sensor characteristics.

Main Methods:

  • Synthesis of Pd-NiO/WO3 nanospheres via a bimetallic modulation strategy.
  • Characterization of sensor performance including response, selectivity, and stability at 160 °C.
  • Mechanistic studies involving oxygen adsorption and Pd oxidation suppression.
  • Machine learning-assisted gas discrimination for enhanced selectivity.

Main Results:

  • The Pd-NiO/WO3 sensor demonstrated a high response (25) to 50 ppm H2 at 160 °C, significantly outperforming Pd-WO3.
  • Achieved fast response-recovery times, excellent hydrogen selectivity, and good long-term stability.
  • NiO doping effectively suppressed Pd oxidation and enhanced catalytic activity.
  • Machine learning achieved 95.8% classification accuracy for gas discrimination.

Conclusions:

  • The bimetallic Pd-NiO/WO3 nanosphere strategy offers synergistic effects for superior hydrogen sensing performance.
  • The developed sensor shows practical applicability, reliably detecting hydrogen from water-splitting devices.
  • This approach provides an effective route for engineering advanced synergistic co-modified systems for high-performance hydrogen sensing.