Mg-Based Solid-State Hydrogen Storage · Catalysis + Structure Synergy

PdMWCNT-AZ61
Next-Generation High-Capacity Hydrogen Storage Material

By integrating Pd-decorated multi-walled carbon nanotubes into a magnesium alloy, the material reaches 6.15 wt% reversible hydrogen capacity — 3.7× that of mainstream rare-earth (AB5) alloys. Faster uptake, lower desorption energy, stable cycling, and safe — without high-pressure tanks.

Pd-decorated MWCNT × AZ61 Mg Alloy · 6.15 wt% reversible H₂ · +58% kinetics · −31% desorption energy

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KEY METRIC

6.15 wt%
Reversible H₂ capacity (90% of theoretical)
3.7×vs AB5 alloy
+58%kinetics
−31%desorption Ea
>95%20 cycles
◆ Peer-reviewed validation ◆ Sieverts-method data ◆ Third-party ICP analysis ◆ RoHS compliant ◆ Custom supply & samples
The Challenge

Why hydrogen storage is the bottleneck of the hydrogen economy

To move from producing hydrogen to using it, storage is the hurdle nobody can skip — and that is exactly where PdMWCNT-AZ61 steps in.

⚠️ The dead-ends of mainstream storage

  • 700-bar compressed gas: heavy, with safety concerns and ever-stricter regulation.
  • Conventional Mg alloys: high capacity, cheap — but slow uptake/release and high desorption temperature (>300°C), stuck in the lab.
  • AB5 rare-earth alloys: only 1.5–1.65 wt% (at their limit), and the system is heavy and hard to move.

✅ Our approach: a catalysis + structure dual pathway

  • We build a "MWCNT hydrogen highway" inside the alloy so H₂ diffuses and permeates fast.
  • Along it we place "Pd super-catalyst stations" that instantly dissociate H₂ and accelerate bonding.
  • The result: high capacity plus +58% uptake and −31% desorption energy — entering mobile storage.
Performance

Hard numbers, not promises

Measured on AZ61 Mg alloy + 3 wt% Pd/MWCNT composite (375°C, 3 MPa H₂, Sieverts method).

6.15wt%
Reversible capacity
3.7×
vs. AB5 alloy
+58%
Faster kinetics
−31%
Lower desorption Ea
>95%
After 20 cycles
Benchmark

Head-to-head with mainstream solutions

When a customer says "our existing rare-earth alloy is good enough" — show them this table.

Metric Mainstream (AB5 rare-earth) PdMWCNT-AZ61 (this material) Customer benefit
H₂ capacity1.5–1.65 wt% (at limit)6.15 wt%Double-and-double the range at the same weight
System weightVery heavy, hard to moveSubstantially lighterEnters mobile: ships / drones / heavy trucks
Operating env.Room temp, but bulkyMid-high temp (pairs with waste heat)Recovers existing waste heat — no extra power
Uptake kineticsStandard+58%Faster refuelling, shorter turnaround
Cyclability—>95% @ 20 cyclesDependable service life
How It Works

A three-tier synergy

~5nm Pd nanoparticles anchored on the nanotube walls; ball-milling refines the alloy grains from ~50μm to 18.7nm. Catalysis, structure and interface work together to build multi-scale hydrogen transport channels.

1

Pd Catalysis

Pd nanoparticles act as H₂ dissociation centres, splitting molecules into atoms and markedly lowering the dissociation barrier.

2

MWCNT Network

Carbon nanotubes drive intense grain refinement and high dislocation density; grain boundaries and dislocations become fast diffusion "highways" for H atoms.

3

Interface Nucleation

The Pd/MWCNT/Mg interface offers low-barrier nucleation sites, so MgH₂ nucleates preferentially and avoids a dense hydride layer blocking further reaction.

MWCNT (H transport)　●　Pd nanoparticle (catalyst, ~5nm)　●　H₂ molecule
Applications

Built for these scenarios

Especially suited to teams with high-temperature waste-heat environments and lightweight, high-capacity requirements.

High-temp Fuel Cells (SOFC)

High-efficiency storage integrated with ~600°C system waste heat.

Heavy-duty Green Vehicles

Hydrogen ships, drones and rail — where lightweight, high-capacity storage is essential.

Industrial Waste-heat Storage

Steel and chemical plants turning 200–500°C waste heat into stored energy value.

Distributed Storage / Backup

Low-pressure, endothermic release, non-explosive — the safest solid-state route.

Specifications

Key specifications

CompositeAZ61 Mg alloy + 3 wt% Pd5MWCNT95
Core additivePd/MWCNT(5/95) composite powder
Pd>97% · 5–15nm · 45 m²/g
MWCNT>90% · 250–300 m²/g
Reversible capacity6.15 wt% (90% of theoretical)
Test methodSieverts method
Absorption375°C · 3 MPa H₂ · 90% in 976s
Desorption onset↓ to ~285°C (40°C below pure AZ61)
Desorption Ea142.6 → 98.4 kJ/mol (−31%)
Compliance / supplyRoHS · custom supply
Credibility

Not a concept deck — evidence at the research level

Performance is backed by rigorous research and third-party testing, ready to withstand your engineering team's due diligence.

📄 Peer-reviewed research

Performance derives from a peer-reviewed study (academic–industry collaboration, 42 references) on the hierarchical synergy of Pd-decorated MWCNTs enhancing hydrogen storage in AZ61 Mg alloy.

🔬 Rigorous methods

Storage kinetics measured by the Sieverts method; microstructure characterised by XRD / SEM / TEM / XPS; JMAK fitting confirms 3-D diffusion control (Avrami n = 1.48).

✅ Third-party analysis

Related nano precious-metal materials are verified by independent ICP analysis (e.g., nano-Pt measured at 99.2% purity) — traceable and reproducible quality.

About Us

About ZnoNova

Guangzhou ZnoNova Technology Development Co., Ltd. focuses on the commercialisation and application of advanced hydrogen-energy materials — bringing breakthrough storage materials from the lab to real demand across the hydrogen value chain.

Centred on PdMWCNT-AZ61 solid-state hydrogen storage material, we serve fuel cells, hydrogen vehicles and industrial waste-heat storage with end-to-end support — from material and formulation to application solutions.

Serving China — the world's largest hydrogen market (~30% of global demand, targeting one million fuel-cell vehicles by 2030) — we aim to be the most dependable partner on the materials side.

Why ZnoNova

  • Research-backed — built on peer-reviewed results; performance is reproducible
  • End-to-end solutions — material, formulation and application support in one
  • Stable supply & customisation — specs tailored to your needs, samples available
  • Close to the hydrogen value chain — fast response, full data under NDA
ZnoNova Commercialising advanced
hydrogen materials
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CompanyGuangzhou ZnoNova Technology Development Co., Ltd.
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AddressRoom 1805, Junchao Center, No.652 Huangpu Ave. Central, Tianhe District, Guangzhou, China
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WeChat18988832169
🌏 Primary market: China's hydrogen value chain (MEA / stacks / electrolysers / storage integrators). Full data package and samples available under NDA.