Stack and cell performance
Polarisation behaviour and efficiency at rated current density, and how claims compare with operating reality.
Electrolysers and hydrogen
Electrolyser engineering for PEM, alkaline, AEM and solid oxide systems.
Independent technical judgement on stack performance, degradation and materials choices, so hydrogen programmes commit to evidence rather than headline efficiency.
What we look at
The parts of an electrolyser programme where evidence decides the outcome.
Degradation and lifetime
Voltage decay rates, catalyst dissolution, membrane thinning and what accelerated tests can and cannot predict.
Catalysts and iridium loading
Thrifting strategies for PEM anodes, nickel-based alternatives for alkaline and AEM, and the trade-offs they bring.
Membranes and diaphragms
Gas crossover, chemical stability and mechanical durability under dynamic operation.
Transport layers and interfaces
Contact resistance, coatings and how interfaces shape both efficiency and lifetime.
Dynamic and intermittent operation
Start-stop cycling, partial load and coupling to variable renewable power.
Typical questions
Questions teams bring to us
- Is the stack performance claim strong enough to base a decision on?
- Which degradation mechanism limits lifetime in the target operating window?
- Will the catalyst and membrane choices hold up at scale?
How evidence is built
Methods we design test plans around and interpret
Polarisation curves and loss breakdown
Separating activation, ohmic and mass-transport losses so improvements target the dominant one.
Electrochemical impedance spectroscopy
Tracking how resistance and kinetics change over time and operating conditions.
Accelerated stress test design
Protocols that stress the failure mode that matters, with a clear link to field conditions.
Post-test analysis plans
Deciding which materials characterisation will explain the result before the stack is opened.
Frequently asked questions
Which electrolyser technologies does Redionix work with?
PEM, alkaline, anion exchange membrane (AEM) and solid oxide (SOEC) systems. The common thread is reading cell and stack evidence critically and connecting it to development and investment decisions.
Can you review a stack supplier's performance and degradation claims?
Yes. A review compares the claimed efficiency and degradation rate with the underlying test conditions, durations and baselines, and sets out which claims are well supported and which need more evidence.
What does an electrolyser readiness review deliver?
A risk-ranked view of the technical case, the evidence still missing before the next stage, and a test plan to close the most important gaps.
Working on something in this area?
Describe the system, the decision and the evidence you already have. That is enough for a useful first conversation.