Electrical Transport — Controllable proton-conducting pathways: Via situating polyoxometalates in targeting pores of a metal-organic framework

19 measurement groups · 37 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

AC impedance spectroscopy

Impedance spectroscopy

1 · Powder

Proton conductivity at 80 C and 100% RH; activation energy from Arrhenius analysis.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: HPW-loaded MIL-101 zigzag pathway
Measurement source: main p.3 · Results and discussion · Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Sample 1 activation energy	0.45 eV	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Sample 1 HPW loading	38.2 wt%	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Sample 1 proton conductivity	3.30 x 10^-6 S cm^-1	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1

AC impedance spectroscopy

Impedance spectroscopy

2 prime · Powder

Proton conductivity at 80 C and 100% RH for lower-loading linear-pathway sample.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: HPW-loaded MIL-101 linear pathway at loading comparable to sample 1
Measurement source: main p.4 · Results and discussion · Fig. S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Sample 2 prime HPW loading	37.7%	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. S9
Sample 2 prime proton conductivity	5.12 x 10^-6 S cm^-1	—	—	Text Exact Reported	main p.4 · Results and discussion · Fig. S9
Matched-loading linear pathway enhancement	1.55-fold higher than sample 1	—	—	Text Rounded Reported	main p.4 · Results and discussion · Fig. S9

AC impedance spectroscopy

Impedance spectroscopy

2 · Powder

Proton conductivity at 80 C and 100% RH; activation energy from Arrhenius analysis.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: HPW-loaded MIL-101 linear pathway
Measurement source: main p.3 · Results and discussion · Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Sample 2 activation energy	0.42 eV	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Sample 2 HPW loading	46.9 wt%	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Sample 2 proton conductivity	7.09 x 10^-6 S cm^-1	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Linear pathway conductivity enhancement versus zigzag	2.1-fold larger	—	—	Text Rounded Reported	main p.4 · Results and discussion

AC impedance spectroscopy

Impedance spectroscopy

3 · Powder

Proton conductivity at 80 C and 100% RH; activation energy from Arrhenius analysis.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: HPW-loaded MIL-101 multiple pathways
Measurement source: main p.3 · Results and discussion · Table 1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Sample 3 activation energy	0.40 eV	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Sample 3 HPW loading	83.9 wt%	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1
Sample 3 proton conductivity	2.17 x 10^-5 S cm^-1	—	—	Table Exact Reported	main p.3 · Results and discussion · Table 1

AC impedance spectroscopy and Arrhenius analysis

Impedance spectroscopy

DETA@3 · Powder

Conductivity at 80 C and 100% RH; Ea from temperature-dependent conductivity under 100% RH.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Polyamine@HPW@MIL-101
Measurement source: main p.5 · Results and discussion · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
DETA@3 activation energy	0.31 eV	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2
DETA@3 proton conductivity	1.90 x 10^-3 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2

AC impedance spectroscopy and Arrhenius analysis

Impedance spectroscopy

EN@3 · Powder

Conductivity at 80 C and 100% RH; Ea from temperature-dependent conductivity under 100% RH.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Polyamine@HPW@MIL-101
Measurement source: main p.5 · Results and discussion · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
EN@3 activation energy	0.37 eV	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2
EN@3 proton conductivity	6.02 x 10^-4 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2

AC impedance spectroscopy

Impedance spectroscopy

MIL-101 · Powder

Proton conductivity of pristine MIL-101, cited for comparison with 1 and 2.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Pristine MIL-101 control
Measurement source: main p.4 · Results and discussion

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
MIL-101 proton conductivity	7.56 x 10^-8 S cm^-1	—	—	Text Exact Reported	main p.4 · Results and discussion

AC impedance spectroscopy

Impedance spectroscopy

PT · Powder

Conductivity under the same experimental conditions as TETA@3.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Non-MOF HPW/TETA blend comparison
Measurement source: main p.5 · Results and discussion · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
PT proton conductivity	8.84 x 10^-7 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2

AC impedance spectroscopy and Arrhenius analysis

Impedance spectroscopy

TEPA@3 · Powder

Conductivity at 80 C and 100% RH; Ea from temperature-dependent conductivity under 100% RH.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Polyamine@HPW@MIL-101
Measurement source: main p.5 · Results and discussion · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TEPA@3 activation energy	0.25 eV	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2
TEPA@3 proton conductivity	9.60 x 10^-3 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2

AC impedance spectroscopy

Impedance spectroscopy

1.7TETA@3 · Powder

1.7TETA@3 TETA-loading-series conductivity at 80 C and 100% RH; exact value not stated in main text.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: TETA loading optimisation on HPW@MIL-101 sample 3
Measurement source: main p.6 · Results and discussion · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
1.7TETA@3 conductivity qualitative position	not among the similar but largest proton conductivities in the main-text summary	—	—	Qualitative Qualitative	main p.6 · Results and discussion · Fig. S17

AC impedance spectroscopy

Impedance spectroscopy

2.7TETA@3 · Powder

2.7TETA@3 TETA-loading-series conductivity at 80 C and 100% RH; main text reports approximate largest-group value.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: TETA loading optimisation on HPW@MIL-101 sample 3
Measurement source: main p.6 · Results and discussion · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
2.7TETA@3 approximate proton conductivityMarked as a best value within this paper	around 1.52 x 10^-2 S cm^-1	—	—	Text Approximate	main p.6 · Results and discussion · Fig. S17

AC impedance spectroscopy

Impedance spectroscopy

3.2TETA@3 · Powder

3.2TETA@3 TETA-loading-series conductivity at 80 C and 100% RH; main text reports approximate largest-group value.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: TETA loading optimisation on HPW@MIL-101 sample 3
Measurement source: main p.6 · Results and discussion · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
3.2TETA@3 approximate proton conductivityMarked as a best value within this paper	around 1.52 x 10^-2 S cm^-1	—	—	Text Approximate	main p.6 · Results and discussion · Fig. S17

AC impedance spectroscopy

Impedance spectroscopy

4.2TETA@3 · Powder

4.2TETA@3 TETA-loading-series conductivity at 80 C and 100% RH; main text reports approximate largest-group value.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: TETA loading optimisation on HPW@MIL-101 sample 3
Measurement source: main p.6 · Results and discussion · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
4.2TETA@3 approximate proton conductivityMarked as a best value within this paper	around 1.52 x 10^-2 S cm^-1	—	—	Text Approximate	main p.6 · Results and discussion · Fig. S17

AC impedance-derived proton conductivity versus relative humidity

Electrical conductivity Impedance spectroscopy

TETA@3 · Powder

RH dependence of TETA@3 at 25 C from SI Fig. S19; values read visually from the plotted log(sigma/S cm^-1) axis.

Temperature: 298
Atmosphere: 45-100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Best polyamine@HPW@MIL-101 sample under varying humidity
Measurement source: SI p.17 · Supplementary Information · Figure S19

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TETA@3 log proton conductivity at 100% RH, 25 CMarked as a best value within this paper	approx. -2.33 log(sigma/S cm^-1) at 100% RH	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S19
TETA@3 log proton conductivity at 45% RH, 25 C	approx. -4.6 log(sigma/S cm^-1) at 45% RH	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S19
TETA@3 log proton conductivity at 60% RH, 25 C	approx. -4.3 log(sigma/S cm^-1) at 60% RH	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S19
TETA@3 log proton conductivity at 70% RH, 25 C	approx. -3.75 log(sigma/S cm^-1) at 70% RH	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S19
TETA@3 log proton conductivity at 80% RH, 25 C	approx. -3.42 log(sigma/S cm^-1) at 80% RH	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S19
TETA@3 log proton conductivity at 90% RH, 25 C	approx. -2.85 log(sigma/S cm^-1) at 90% RH	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S19

Time-dependent proton conductivity stability test

Electrical conductivity

TETA@3 · Powder

TETA@3 held at 80 C and 100% RH; SI Fig. S20 plots log(sigma/S cm^-1) versus time for about 14 days.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: Best polyamine@HPW@MIL-101 sample stability
Measurement source: SI p.17 · Supplementary Information · Figure S20

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TETA@3 approximate log conductivity after 14 days	approximately -1.96 log(sigma/S cm^-1) after 14 days, essentially unchanged across the plotted period	—	visual estimate from plotted axis	Figure Axis Approximate	SI p.17 · Supplementary Information · Figure S20

AC impedance spectroscopy and Arrhenius analysis

Impedance spectroscopy

TETA@3 · Powder

Conductivity at 80 C and 100% RH; temperature-dependent conductivity from 25 to 80 C under 100% RH; humidity and long-term stability tests referenced in SI.

Temperature: 298-353
Atmosphere: 100% RH; RH-dependence at 25 C referenced
Geometry: Pressed powder pellet between copper electrodes
Context: Best polyamine@HPW@MIL-101 sample
Measurement source: main p.6 · Results and discussion · Fig. 4; Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TETA@3 activation energyMarked as a best value within this paper	0.22 eV	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2
TETA@3 proton conductivityMarked as a best value within this paper	1.52 x 10^-2 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2
TETA@3 long-term stability condition	more than half a month at 80 C and 100% RH with no degradation	—	—	Text Approximate	main p.6 · Results and discussion · Fig. S20

AC impedance spectroscopy

Impedance spectroscopy

1.2TETA@3 · Powder

TETA-loading series compared at 80 C and 100% RH; exact table result available for 1.2TETA@3, qualitative/approximate values for higher-loading variants in main text.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: TETA loading optimisation on HPW@MIL-101 sample 3
Measurement source: main p.6 · Results and discussion · Fig. S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
1.2TETA@3 proton conductivity	6.70 x 10^-4 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2

AC impedance spectroscopy

Impedance spectroscopy

TETA@MIL-101 · Powder

Conductivity under the same experimental conditions as TETA@3.

Temperature: 353
Atmosphere: 100% RH
Geometry: Pressed powder pellet between copper electrodes
Context: TETA-modified MIL-101 control without HPW
Measurement source: main p.5 · Results and discussion · Table 2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TETA@MIL-101 proton conductivity	2.15 x 10^-7 S cm^-1	—	—	Table Exact Reported	main p.5 · Results and discussion · Table 2

AC impedance spectroscopy on pressed powder discs

Impedance spectroscopy

MIL-101 · Powder

Powders pressed at 10 MPa for 1 min into discs of 10 mm diameter and 3.0 +/- 0.2 mm thickness, sandwiched between copper electrodes; 1 Hz to 1 MHz, 150 mV input; target condition held for 4 h.

Atmosphere: Relative humidity controlled using an HDHWHS-50 incubator
Geometry: Pressed powder pellet between two copper electrodes
Context: General transport method for all powder samples
Measurement source: main p.3 · Experimental - AC impedance measurements

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source