PEM Electrolyzer Anode Catalyst With Oxygen Vacancies for Lower Cost

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Solution Overview

Problem

Current anode-side catalysts for water electrolysis, such as Ruthenium and Iridium, are expensive and there is a need for more efficient and durable catalysts that can reduce costs without using precious metals.

Innovation Solution

A catalyst comprising Y2Ru2O7—NaBH4 is used, formed by treating Y2Ru2O7 pyrochlore oxide nanoparticles with sodium borohydride to introduce controlled surface oxygen vacancies, enhancing catalytic activity and durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If precious metal catalysts (Ruthenium or Iridium) are used at the anode, then catalytic activity and durability are improved, but manufacturing cost increases significantly

Engineering Contradiction:

Improvecatalyst durabilityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the chemical composition parameters of the catalyst by incorporating Sodium Borohydride (NaBH4) into the Y2Ru2O7 structure. This parameter modification creates oxygen vacancies and alters the electronic structure, enabling the catalyst to achieve high activity and durability without relying on precious metals like Iridium or Ruthenium, thus resolving the cost-durability contradiction

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite catalyst material combining Y2Ru2O7 pyrochlore oxide with NaBH4. This composite structure leverages the synergistic effects between the pyrochlore framework and borohydride moieties, achieving enhanced catalytic performance that rivals or exceeds precious metal catalysts while eliminating the need for expensive noble metals

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional catalysts are used, then manufacturing cost is reduced, but catalytic activity and efficiency decrease

Engineering Contradiction:

Improvecatalytic activityVSAvoidmanufacturing cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

By modifying the stoichiometric composition and introducing oxygen vacancies through NaBH4 treatment, the catalyst achieves superior catalytic activity for the oxygen evolution reaction. This parameter optimization allows the material to outperform conventional catalysts in terms of productivity and efficiency

Inventive Principle:

Principle #35Parameter changes

3Duration of action of stationary object

If expensive precious metal catalysts are used, then current density stability over time is improved, but economic viability decreases

Engineering Contradiction:

Improvecurrent density stabilityVSAvoidprecious metal content

Core Design Contradiction:

Duration of action of stationary objectVSQuantity of substance

Solution Approach 1:

The patent replaces expensive, finite precious metal resources with an abundant, earth-abundant material system based on yttrium, ruthenium, and sodium. This substitution maintains long-term operational stability and current density performance while eliminating dependence on scarce noble metals, thereby improving both durability and economic sustainability

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The Y2Ru2O7—NaBH4 catalyst outperforms IrO2 by 200% in catalytic activity and maintains high current density over 10 hours, demonstrating improved efficiency and durability.

Implementation Method 1

performing a chemical reduction procedure on the Y2Ru2O7 pyrochlore oxide nanoparticles using NaBH4 to thereby form an anode catalyst comprises an Y2Ru2O7—NaBH4 nanoparticles

Methodology Applied

Scientific EffectChemical reduction: Reduction

Implementation Method 2

anode comprising an anode catalyst configured to promote oxidation of water; water at the anode reacts to form oxygen and positively charged hydrogen ions

Methodology Applied

Scientific EffectOxidation: Oxidation

Implementation Method 3

proton exchange membrane (PEM) between the cathode and the anode, wherein the cathode, anode, and proton exchange membrane are configured such that water at the anode reacts to form oxygen and positively charged hydrogen ions

Methodology Applied

Scientific EffectIon transport through membrane: Semipermeable Membrane

Implementation Method 4

the positively charged ions react at the cathode to form hydrogen (H2)

Methodology Applied

Scientific EffectElectrochemical reduction: Reduction

Data Source

PatentUS20250361630A1Electrolyzer having an anode-side catalyst and related methods

Publication Date: 2025.11.27 GEORGIA TECH RES CORP

AI summary

An electrolyzer system includes a cathode comprising a cathode catalyst: an anode comprising an anode catalyst configured to promote oxidation of water: and a proton exchange membrane (PEM) between the cathode and the anode, wherein the cathode, anode, and proton exchange membrane are configured such that water at the anode reacts to form oxygen and positively charged hydrogen ions, and the positively charged ions react at the cathode to form hydrogen (H2): wherein the catalyst comprises a Y2Ru2O7—NaBH4 catalyst.