Glossary
A process where one substance is taken up into the interior of another, important in hydrogen storage.
Controls the air flow in fuel cells for optimal efficiency.
A hydrogen production method using a liquid electrolyte to split water into hydrogen and oxygen.
A fuel cell that uses an alkaline electrolyte; one of the earliest fuel cell types.
A hydrogen carrier used for storage and transport due to its high hydrogen content.
Measurement of electrical current, key to evaluating hydrogen-powered systems.
A biological process that produces hydrogen from organic material without oxygen.
A new type of fuel cell membrane allowing hydroxide ions to flow.
The electrode where oxidation occurs in electrolysis, releasing oxygen.
Electrolysis conducted at standard air pressure.
A hydrogen production process combining steam reforming and partial oxidation.
A small engine that generates electricity, sometimes powered by hydrogen.
Emergency power systems that can be powered by hydrogen fuel cells.
Supporting components in a hydrogen fuel cell system, excluding the fuel cell stack.
A vehicle powered solely by batteries, unlike hydrogen fuel cell vehicles.
Turning organic materials into hydrogen-rich gas.
Mixing hydrogen with natural gas in pipelines.
Hydrogen produced from natural gas with carbon capture to reduce emissions.
Evaporated gas from liquid hydrogen storage that must be managed.
Hydrogen loss due to evaporation in liquid hydrogen storage.
The temperature at which hydrogen turns from liquid to gas: −253°C.
Systems that cool down the fuel cell to maintain performance.
Material cracking caused by hydrogen exposure in some metals.
Temporarily stores hydrogen to manage supply/demand changes.
Storing large quantities of hydrogen, often in compressed or liquid form.
Hydrogen created as a secondary output during industrial processes.
Technology that traps and stores CO₂ emissions.
The total greenhouse gas emissions caused by a system or product.
A material that speeds up chemical reactions in fuel cells and hydrogen production.
A refining process to produce hydrogen from hydrocarbons.
Hydrogen made at large plants and transported to users.
A compound that releases hydrogen through a chemical reaction.
Hydrogen produced with low or no carbon emissions.
Carbon dioxide released during hydrogen production without CCS.
Hydrogen gas stored at high pressure for transport or use.
The financial cost of producing one kg of hydrogen.
Undesired flow of hydrogen or oxygen through a membrane, reducing efficiency.
Keeping hydrogen in liquid form at extremely low temperatures.
Reducing carbon emissions across industries using hydrogen.
Removing hydrogen from a compound, often used in hydrogen storage.
Adjusting hydrogen use to match power grid needs.
Removing sulphur from fuels before hydrogen production.
Hydrogen fuel applications replacing traditional diesel engines.
A fuel cell using methanol, which can be hydrogen-derived.
Device that delivers hydrogen to vehicles at refuelling stations.
Producing hydrogen close to where it’s used.
A fuel that can be synthesised using hydrogen.
U.S. body supporting hydrogen research and development.
A method to produce hydrogen using CO₂ and methane.
Engines that can run on hydrogen and another fuel.
How well a system converts energy into useful power.
A reaction that creates electricity from chemicals, like in fuel cells.
The machine that performs electrolysis.
Splitting water into hydrogen and oxygen using electricity.
Gases released into the air, often from burning fuels.
The final application of hydrogen, like in cars or heating.
A substance like hydrogen that stores and delivers energy.
How much energy is stored in a given amount of hydrogen.
The global shift from fossil fuels to cleaner energy.
The raw material used to produce hydrogen.
The heat level of hydrogen when it burns.
How easily hydrogen catches fire.
The speed at which hydrogen moves through a system.
A device that turns hydrogen into electricity.
A car powered by hydrogen fuel cells.
A lab method to check hydrogen purity.
A pressurised container for storing hydrogen safely.
A layer in fuel cells that helps spread gases evenly.
A device designed to detect hydrogen leaks, often due to its odourless nature.
Equipment used to blend hydrogen with natural gas.
A device that removes contaminants from hydrogen gas.
Hydrogen stored as a compressed gas under high pressure.
The amount of hydrogen by weight a system can store.
Hydrogen made via electrolysis using renewable electricity.
The extra cost of clean hydrogen compared to fossil-derived hydrogen.
Feeding hydrogen into existing natural gas pipelines.
A compound where hydrogen is bonded with a metal, often used for solid hydrogen storage.
The lightest element, used as a clean energy carrier.
Mixing hydrogen into the natural gas grid for use in homes or industry.
A substance or method used to safely store and move hydrogen.
Weakening of metals due to exposure to hydrogen.
A system that converts hydrogen and oxygen into electricity.
Infrastructure used to transport hydrogen over distances.
Equipment that removes impurities from hydrogen gas.
A site where hydrogen vehicles are filled with compressed hydrogen.
A device that detects the presence of hydrogen in the air.
Methods for keeping hydrogen safely, such as in tanks or underground.
Hydrogen used in sectors like steel, ammonia, and refining.
The network of pipelines, stations, and plants supporting hydrogen use.
Where hydrogen is added into a pipeline or process.
The pressure at which hydrogen enters a device or system.
Material that prevents heat transfer for storing liquid hydrogen.
Gaps in renewable power supply that hydrogen can help balance.
Creating hydrogen inside a fuel cell from other fuels like methanol.
Projects or hydrogen quality considered bankable or commercially viable.
A component in fuel cells that lets protons pass through while blocking gases.
A standardised tank for transporting hydrogen as a liquid or gas.
Forms like deuterium and tritium used in advanced energy research.
A component in some hydrogen infrastructure for injection or withdrawal.
Hydrogen being researched as a clean fuel for aviation.
The way hydrogen burns and disperses in air, important for safety.
A partnership between companies to build hydrogen projects.
A unit of energy used to describe hydrogen’s energy content.
Heat generated when electricity passes through resistive material, relevant to electrolysers.
Where electrical output from fuel cells is collected.
Ensuring the shift to hydrogen energy is fair for all communities.
A measure used to describe hydrogen’s burning characteristics.
A temperature sensor used in hydrogen systems.
The effectiveness of insulation in cryogenic hydrogen storage.
A specialised welding method used in hydrogen pipelines.
A common unit to measure hydrogen for transport and pricing.
The energy from hydrogen movement, often in flow systems.
Hydrogen’s tendency to avoid knocking in combustion engines.
Potassium hydroxide solution used in alkaline electrolysers.
Indicates how much electrical load a hydrogen fuel cell can handle.
The average cost to produce hydrogen over a project’s lifetime.
A special insulated tank for storing liquid hydrogen.
Using extra pressure in pipelines to store more hydrogen gas.
A facility where hydrogen gas is turned into liquid.
Hydrogen cooled to -253°C to become a liquid for compact storage.
Mixtures of hydrogen and liquefied natural gas for hybrid energy solutions.
Energy lost during hydrogen production, storage, or transport.
Hydrogen made with reduced CO₂ emissions, often via carbon capture.
The heart of a fuel cell, where reactions take place.
Materials that absorb hydrogen and are used for solid-state storage.
Producing hydrogen from natural gas, typically with CO₂ emissions.
A small-scale power system that can use hydrogen for backup or primary energy.
An electrolyser system made of multiple scalable units.
A type of fuel cell using high-temperature carbonate salts.
Tiny-structured materials used for efficient hydrogen storage.
Adding hydrogen to natural gas pipelines for lower-carbon energy.
Ultra-low carbon hydrogen production methods.
A material often used in hydrogen production via reforming.
A battery type related to early hydrogen storage technologies.
A method for producing hydrogen without high heat.
Pollutants that can form when hydrogen is burned at high temperatures.
Hydrogen systems that work independently from the power grid.
A contract to buy hydrogen once it’s produced.
How hydrogen is carried inside vehicles, usually in pressurised tanks.
Producing hydrogen directly where it’s needed, like at a station.
The chemical (often oxygen or air) that reacts with hydrogen in fuel cells.
The process where hydrogen loses electrons in a fuel cell.
The oxygen-releasing half of water-splitting in electrolysis.
Producing hydrogen by reacting a fuel with limited oxygen.
A type of electrolyser that uses a proton exchange membrane to produce hydrogen.
A fuel cell that uses a proton exchange membrane and operates at low temperatures.
A strong container used to store compressed hydrogen safely.
Equipment used to remove impurities from hydrogen after production.
A detailed analysis of hydrogen safety risks.
A summary sheet used in hydrogen project proposals.
Steps to ensure hydrogen meets purity and safety standards.
Emerging research into hydrogen storage using quantum-level materials.
A method of compressing hydrogen slowly to test material strength.
Rapidly cooling a hydrogen flame to stop combustion.
The minimum gap needed to stop hydrogen from burning between surfaces.
A technique used to analyse hydrogen gas quality.
The chemical process that powers hydrogen fuel cells.
A device that extracts hydrogen from fossil fuels like methane.
A facility where hydrogen vehicles are filled with gas or liquid hydrogen.
Hydrogen made using energy from wind, solar, or hydro sources.
A system that can both generate and store electricity using hydrogen.
A device that releases pressure to prevent hydrogen system failure.
A layer in a fuel cell that keeps hydrogen and oxygen apart.
Linking hydrogen systems with digital energy networks for efficiency.
A high-temperature fuel cell that can use hydrogen or other fuels.
A substance that absorbs or adsorbs hydrogen for storage.
The most common method for producing hydrogen from natural gas.
The part of the hydrogen vehicle cycle measuring energy from fuel tank to motion.
A method of producing hydrogen by breaking down hydrocarbons with heat.
Using heat to break water into hydrogen and oxygen.
Producing hydrogen when electricity is cheapest or most available.
A lightweight carbon fibre tank used to store hydrogen in vehicles.
Very clean hydrogen needed for sensitive fuel cell systems.
Storing hydrogen in salt caverns or rock formations.
A system that works as both an electrolyser and fuel cell.
A standardised nozzle for refuelling hydrogen vehicles.
The early stages of hydrogen production and feedstock processing.
How much of the produced hydrogen is actually used in a system.
A large electrolyser designed for industrial hydrogen production.
A system’s ability to handle changes in power demand, important for fuel cells.
A system where hydrogen-powered vehicles can send electricity back to the grid.
A tall pipe used to safely release excess hydrogen gas.
The ability of a hydrogen tank to remain safe under pressure.
How much input voltage is needed to produce usable hydrogen energy.
How much hydrogen can be stored in a given space.
Splitting water into hydrogen and oxygen using electricity.
Reclaiming water produced in a fuel cell to reuse in the system.
A process that increases hydrogen yield by converting carbon monoxide and water into hydrogen and CO₂.
A hydrogen compressor that uses liquid to prevent leaks.
A measure of fuel interchangeability, relevant when blending hydrogen into gas networks.
A reinforcing material layer wrapped around hydrogen tanks.
The horizontal scale used in graphs measuring hydrogen levels or time.
A tool used in research to study hydrogen storage materials.
Studying effects of foreign chemicals (including hydrogen byproducts) on the environment.
Using xenon’s known behaviour as a reference in gas studies, including hydrogen leak detection.
A light source used in advanced hydrogen photolysis research.
Used to analyse surfaces in hydrogen catalysts.
A pipe fitting that splits or merges hydrogen flow.
The vertical scale showing pressure, flow, or concentration in hydrogen system charts.
A proposed term for hydrogen made using grid electricity (often fossil-based).
The amount of hydrogen produced from a certain process.
A graph showing how much hydrogen is produced over time.
A measure of how much input results in usable hydrogen.
Improving the efficiency of hydrogen output through process changes.
A material used in refining and hydrogen reaction processes.
A hydrogen production method that avoids wastewater.
Hydrogen that is produced and used without releasing carbon emissions.
A design where components are tightly packed to improve efficiency.
A ceramic material used in solid oxide fuel cells.
A material that can safely store hydrogen in solid form.