Electrochemistry Application — Probing the electronic and ionic transport in topologically distinct redox-active metal-organic frameworks in aqueous electrolytes

7 measurement groups · 49 results

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

Chronoamperometry and Cottrell apparent diffusivity analysis

Chronoamperometry

Mn-CAU-24 thin film on FTO · Thin Film

Film held at +1.0 V vs Ag/AgCl/NaCl (3 M) for 120 s, then switched to 0 V at t = 0; Na2SO4 concentrations 0.05, 0.1, 0.25, 0.5 and 1.0 M.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: Drop-cast Mn-CAU-24/FTO working electrode; three-electrode cell
Context: Mn-decorated target thin film.
Measurement source: S-16 · Supporting Information · Figure S14; Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Electrochemically active Mn fraction in Mn-CAU-24 at 0.05 M Na2SO4	Active Mn = 1.63%	—	—	Visual Estimate Rounded Reported	S-16 · Supporting Information · Figure S14(a)
Electrochemically active Mn fraction in Mn-CAU-24 at 0.1 M Na2SO4	Active Mn = 3.54%	—	—	Visual Estimate Rounded Reported	S-16 · Supporting Information · Figure S14(b)
Electrochemically active Mn fraction in Mn-CAU-24 at 0.25 M Na2SO4	Active Mn = 5.79%	—	—	Visual Estimate Rounded Reported	S-16 · Supporting Information · Figure S14(c)
Electrochemically active Mn fraction in Mn-CAU-24 at 0.5 M Na2SO4	Active Mn = 6.12%	—	—	Visual Estimate Rounded Reported	S-16 · Supporting Information · Figure S14(d)
Electrochemically active Mn fraction in Mn-CAU-24 at 1.0 M Na2SO4Marked as a best value within this paper	Active Mn = 6.73%	—	—	Visual Estimate Rounded Reported	S-16 · Supporting Information · Figure S14(e)
Charge-transport distance in Mn-CAU-24 at 1.0 M Na2SO4	1.68 um of the thin film	—	—	Text Exact Reported	9863 · Results and discussion - Chronoamperometric studies
Apparent diffusivity of Mn-CAU-24 at 0.05 M Na2SO4	6.4 x 10^-11 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-CAU-24 at 0.1 M Na2SO4	1.8 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-CAU-24 at 0.25 M Na2SO4	2.6 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-CAU-24 at 0.5 M Na2SO4	4.0 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-CAU-24 at 1.0 M Na2SO4Marked as a best value within this paper	5.1 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4

Chronoamperometry and Cottrell apparent diffusivity analysis

Chronoamperometry

Mn-MOF-808 thin film on FTO · Thin Film

Film held at +1.0 V vs Ag/AgCl/NaCl (3 M) for 120 s, then switched to 0 V at t = 0; Na2SO4 concentrations 0.05, 0.1, 0.25, 0.5 and 1.0 M.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: Drop-cast Mn-MOF-808/FTO working electrode; three-electrode cell
Context: Mn-decorated target thin film.
Measurement source: S-14 · Supporting Information · Figure S12; Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Electrochemically active Mn fraction in Mn-MOF-808 at 0.05 M Na2SO4	Active Mn = 2.23%	—	—	Visual Estimate Rounded Reported	S-14 · Supporting Information · Figure S12(a)
Electrochemically active Mn fraction in Mn-MOF-808 at 0.1 M Na2SO4	Active Mn = 5.17%	—	—	Visual Estimate Rounded Reported	S-14 · Supporting Information · Figure S12(b)
Electrochemically active Mn fraction in Mn-MOF-808 at 0.25 M Na2SO4	Active Mn = 7.07%	—	—	Visual Estimate Rounded Reported	S-14 · Supporting Information · Figure S12(c)
Electrochemically active Mn fraction in Mn-MOF-808 at 0.5 M Na2SO4	Active Mn = 9.62%	—	—	Visual Estimate Rounded Reported	S-14 · Supporting Information · Figure S12(d)
Electrochemically active Mn fraction in Mn-MOF-808 at 1.0 M Na2SO4Marked as a best value within this paper	Active Mn = 10.16%	—	—	Visual Estimate Rounded Reported	S-14 · Supporting Information · Figure S12(e)
Charge-transport distance in Mn-MOF-808 at 1.0 M Na2SO4Marked as a best value within this paper	4.90 um of the thin film	—	—	Text Exact Reported	9863 · Results and discussion - Chronoamperometric studies
Apparent diffusivity of Mn-MOF-808 at 0.05 M Na2SO4	9.5 x 10^-11 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-MOF-808 at 0.1 M Na2SO4	4.9 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-MOF-808 at 0.25 M Na2SO4	6.2 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-MOF-808 at 0.5 M Na2SO4	8.4 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-MOF-808 at 1.0 M Na2SO4Marked as a best value within this paper	9.8 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4

Chronoamperometry and Cottrell apparent diffusivity analysis

Chronoamperometry

Mn-UiO-66 thin film on FTO · Thin Film

Film held at +1.0 V vs Ag/AgCl/NaCl (3 M) for 120 s, then switched to 0 V at t = 0; Na2SO4 concentrations 0.05, 0.1, 0.25, 0.5 and 1.0 M.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: Drop-cast Mn-UiO-66/FTO working electrode; three-electrode cell
Context: Mn-decorated target thin film.
Measurement source: S-15 · Supporting Information · Figure S13; Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Electrochemically active Mn fraction in Mn-UiO-66 at 0.05 M Na2SO4	Active Mn = 1.08%	—	—	Visual Estimate Rounded Reported	S-15 · Supporting Information · Figure S13(a)
Electrochemically active Mn fraction in Mn-UiO-66 at 0.1 M Na2SO4	Active Mn = 3.05%	—	—	Visual Estimate Rounded Reported	S-15 · Supporting Information · Figure S13(b)
Electrochemically active Mn fraction in Mn-UiO-66 at 0.25 M Na2SO4	Active Mn = 5.66%	—	—	Visual Estimate Rounded Reported	S-15 · Supporting Information · Figure S13(c)
Electrochemically active Mn fraction in Mn-UiO-66 at 0.5 M Na2SO4	Active Mn = 7.24%	—	—	Visual Estimate Rounded Reported	S-15 · Supporting Information · Figure S13(d)
Electrochemically active Mn fraction in Mn-UiO-66 at 1.0 M Na2SO4Marked as a best value within this paper	Active Mn = 7.38%	—	—	Visual Estimate Rounded Reported	S-15 · Supporting Information · Figure S13(e)
Charge-transport distance in Mn-UiO-66 at 1.0 M Na2SO4	2.44 um of the thin film	—	—	Text Exact Reported	9863 · Results and discussion - Chronoamperometric studies
Apparent diffusivity of Mn-UiO-66 at 0.05 M Na2SO4	6.2 x 10^-12 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-UiO-66 at 0.1 M Na2SO4	4.1 x 10^-11 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-UiO-66 at 0.25 M Na2SO4	1.2 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-UiO-66 at 0.5 M Na2SO4	2.2 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4
Apparent diffusivity of Mn-UiO-66 at 1.0 M Na2SO4Marked as a best value within this paper	2.4 x 10^-10 cm2/s	—	—	SI Table Exact Reported	S-18 · Supporting Information · Table S4

Cyclic voltammetry on drop-cast thin films

Voltammetry

All powder materials: MOF-808, Mn-MOF-808, UiO-66, Mn-UiO-66, CAU-24 and Mn-CAU-24 · Powder

MOF-808, UiO-66 and CAU-24 pristine control thin films measured at 50 mV s-1 in 0.5 M Na2SO4(aq), conventional three-electrode setup with Ag/AgCl/NaCl (3 M) reference and Pt counter.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: MOF/FTO working electrode, 0.25 cm2 exposed FTO area
Context: Pristine redox-innocent controls versus Mn-decorated target films.
Measurement source: 9860 · Results and discussion - Cyclic voltammetric studies · Figures 5a, 6a, 7a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Pristine Zr-MOF thin-film electrochemical activity	Pristine redox-innocent MOF thin films are not electrochemically active in the tested window.	—	—	Text Qualitative	9861 · Results and discussion - Cyclic voltammetric studies · Figures 5a, 6a, 7a

Cyclic voltammetry scan-rate analysis, log(Jpa) vs log(v)

Voltammetry

Mn-CAU-24 thin film on FTO · Thin Film

Mn-CAU-24 thin film in 0.05-1.0 M Na2SO4(aq); anodic peak near +0.6 V vs Ag/AgCl/NaCl (3 M) used.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: Drop-cast Mn-CAU-24/FTO working electrode in three-electrode cell
Context: Mn-decorated target thin film.
Measurement source: S-13 · Supporting Information · Figure S11; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Mn-CAU-24 log(Jpa)-log(v) slope at 0.05 M Na2SO4	0.86	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-CAU-24 log(Jpa)-log(v) slope at 0.1 M Na2SO4	0.85	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-CAU-24 log(Jpa)-log(v) slope at 0.25 M Na2SO4	0.90	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-CAU-24 log(Jpa)-log(v) slope at 0.5 M Na2SO4Marked as a best value within this paper	1.03	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-CAU-24 log(Jpa)-log(v) slope at 1.0 M Na2SO4	0.84	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2

Cyclic voltammetry scan-rate analysis, log(Jpa) vs log(v)

Voltammetry

Mn-MOF-808 thin film on FTO · Thin Film

Mn-MOF-808 thin film in 0.05-1.0 M Na2SO4(aq); anodic peak near +0.6 V vs Ag/AgCl/NaCl (3 M) used.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: Drop-cast Mn-MOF-808/FTO working electrode in three-electrode cell
Context: Mn-decorated target thin film.
Measurement source: S-13 · Supporting Information · Figure S11; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Mn-MOF-808 log(Jpa)-log(v) slope at 0.05 M Na2SO4	0.86	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-MOF-808 log(Jpa)-log(v) slope at 0.1 M Na2SO4Marked as a best value within this paper	1.00	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-MOF-808 log(Jpa)-log(v) slope at 0.25 M Na2SO4	0.81	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-MOF-808 log(Jpa)-log(v) slope at 0.5 M Na2SO4Marked as a best value within this paper	1.00	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-MOF-808 log(Jpa)-log(v) slope at 1.0 M Na2SO4	0.74	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2

Cyclic voltammetry scan-rate analysis, log(Jpa) vs log(v)

Voltammetry

Mn-UiO-66 thin film on FTO · Thin Film

Mn-UiO-66 thin film in 0.05-1.0 M Na2SO4(aq); anodic peak near +0.6 V vs Ag/AgCl/NaCl (3 M) used.

Temperature: room temperature
Atmosphere: aqueous Na2SO4 electrolyte
Geometry: Drop-cast Mn-UiO-66/FTO working electrode in three-electrode cell
Context: Mn-decorated target thin film.
Measurement source: S-13 · Supporting Information · Figure S11; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Mn-UiO-66 log(Jpa)-log(v) slope at 0.05 M Na2SO4	0.84	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-UiO-66 log(Jpa)-log(v) slope at 0.1 M Na2SO4	0.88	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-UiO-66 log(Jpa)-log(v) slope at 0.25 M Na2SO4Marked as a best value within this paper	0.93	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-UiO-66 log(Jpa)-log(v) slope at 0.5 M Na2SO4	0.83	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2
Mn-UiO-66 log(Jpa)-log(v) slope at 1.0 M Na2SO4	0.81	—	—	SI Table Exact Reported	S-13 · Supporting Information · Table S2