Electrochemistry Application — Electrically conductive Pt-MOFs for acidic oxygen reduction: Optimized performance via altering conjugated ligands

10 measurement groups · 26 results

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

CO stripping ECSA

Pt3(C12N6O6)2 MOF RRDE electrode · Electrode

N2 baseline CV, CO adsorption at 0 V for 30 min, N2 purge, integrated CO stripping peak.

Atmosphere: N2 and CO purges
Geometry: electrode in acidic electrolyte
Context: MOF catalyst ink on electrode
Measurement source: SI text · CO stripping test · Figure S15

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
integrated stripped CO charge	4.2 x 10^-2 microC	—	—	Text Exact Reported	p. 14 · CO stripping test · Figure S15
ECSA from CO stripping	5.46 m2/g	5.46 m2/g	—	Text Exact Reported	p. 7 · 3.2 · Fig. S15
ECSA from CO stripping	55.62 m2/g	55.62 m2/g	—	Text Exact Reported	p. 14 · CO stripping test · Figure S15

Cyclic voltammetry for acidic ORR activity

Voltammetry

Pt3(C12N6O6)2 MOF RRDE electrode · Electrode

CV of Pt3(C12N12H6)2, Pt3(C12N9H3O3)2, Pt3(C12N6O6)2 and Pt/C in oxygen-saturated 0.5 M H2SO4.

Temperature: ~298
Atmosphere: O2-saturated electrolyte
Geometry: three-electrode RRDE/glassy carbon working electrode
Context: MOF catalyst inks and Pt/C control
Measurement source: p. 6 · 3.2 · Fig. 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CV ORR peak/current rankingMarked as a best value within this paper	Pt3(C12N6O6)2 MOF had superior ORR peak current density and position versus commercial Pt/C	—	—	Qualitative Qualitative	p. 6 · 3.2 · Fig. 4b

Accelerated durability cycling and chronoamperometry

Chronoamperometry

Pt3(C12N6O6)2 MOF RRDE electrode · Electrode

Potential cycling 0.6 to 1.0 V vs RHE in O2-purged 0.5 M H2SO4 at 50 mV s^-1; separate 120 h constant-potential test at 0.7 V.

Temperature: ~298
Atmosphere: O2-purged electrolyte
Geometry: RRDE/electrode
Context: MOF catalyst ink on electrode
Measurement source: p. 6-7 · 2.6; 3.2 · Fig. 4c; Fig. S5b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
current-density decline after 120 hMarked as a best value within this paper	4.8 % at 0.7 V	4.8 %	—	Text Exact Reported	p. 6 · 3.2 · Fig. S5b
accelerated durability cycle count	20,000 cycles	—	—	Text Exact Reported	p. 6 · 3.2 · Fig. 4c
current-density degradation after cyclingMarked as a best value within this paper	about 5.2 % at 0.85 V	5.2 %	—	Text Approximate	p. 6 · 3.2 · Fig. 4c

H2-air PEMFC polarization and power-density test

Pt3(C12N6O6)2 MOF-based MEA cathode · Electrode

Nafion 211 MEA; cell 60 C; electrode area 5 cm2; 100% RH; H2 fuel and air oxidant; back pressure 0.2 MPa.

Temperature: 333.15
Atmosphere: H2 anode, air cathode
Geometry: MEA, active area 5 cm2
Context: MOF-based composite cathode MEA
Measurement source: SI text · Pt3(C12N6O6)2 MOF-modified MEA in fuel cell · Figure S16

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
fuel-cell current density at 0.8 V	about 100 mA cm^-2 at 0.8 V	100 mA/cm2	—	Text Approximate	p. 7 · 3.2 · Fig. S16
cathode catalyst loading	0.8 mg cm^-2 total Pt3(C12N6O6)2 MOF	0.8 mg/cm2	—	Text Exact Reported	p. 15 · MEA · Figure S16
maximum power densityMarked as a best value within this paper	248 mW cm^-2 at 0.74 V	248 mW/cm2	—	Text Exact Reported	p. 7 · 3.2 · Fig. S16

Linear sweep voltammetry for ORR

Voltammetry

Pt3(C12N9H3O3)2 MOF RRDE electrode · Electrode

O2-saturated 0.5 M H2SO4; scan rate 5 mV s^-1; 1600 rpm; potentials vs RHE.

Temperature: ~298
Atmosphere: O2-saturated electrolyte
Geometry: RRDE/glassy carbon working electrode
Context: MOF catalyst ink on electrode
Measurement source: p. 6 · 3.2 · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR half-wave potential E1/2	0.815 V	0.815 V vs RHE	—	Text Exact Reported	p. 6 · 3.2 · Fig. 4a
mass activity at 0.9 VMarked as a best value within this paper	0.412 A mg^-1	0.412 A/mg	—	Text Exact Reported	p. 6 · 3.2

Linear sweep voltammetry for ORR

Voltammetry

Pt3(C12N12H6)2 MOF RRDE electrode · Electrode

O2-saturated 0.5 M H2SO4; scan rate 5 mV s^-1; 1600 rpm; potentials vs RHE.

Temperature: ~298
Atmosphere: O2-saturated electrolyte
Geometry: RRDE/glassy carbon working electrode
Context: MOF catalyst ink on electrode
Measurement source: p. 6 · 3.2 · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR half-wave potential E1/2	0.827 V	0.827 V vs RHE	—	Text Exact Reported	p. 6 · 3.2 · Fig. 4a
mass activity at 0.9 V	0.341 A mg^-1	0.341 A/mg	—	Text Exact Reported	p. 6 · 3.2

Linear sweep voltammetry for ORR

Voltammetry

Pt3(C12N6O6)2 MOF RRDE electrode · Electrode

O2-saturated 0.5 M H2SO4; scan rate 5 mV s^-1; 1600 rpm; potentials vs RHE.

Temperature: ~298
Atmosphere: O2-saturated electrolyte
Geometry: RRDE/glassy carbon working electrode
Context: MOF catalyst ink on electrode
Measurement source: p. 6 · 3.2 · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR half-wave potential E1/2Marked as a best value within this paper	0.836 V vs RHE at 1600 rpm	0.836 V vs RHE	—	Text Exact Reported	p. 6 · 3.2 · Fig. 4a
limiting current density jL	5.28 mA cm^-2	5.28 mA/cm2	—	Text Exact Reported	p. 1 · Abstract
mass activity at 0.9 V	0.0625 A mg^-1	0.0625 A/mg	—	Text Exact Reported	p. 6 · 3.2
ORR half-wave potential in SI Table S1Marked as a best value within this paper	0.836 V	—	—	SI Table Exact Reported	p. 12 · Table S1 · Table S1
Pt-MOF loading in Pt-based catalyst comparison	39.80 microg cm^-2	—	—	SI Table Exact Reported	p. 13 · Table S2 · Table S2

Linear sweep voltammetry for ORR

Voltammetry

20 wt% Pt/C RRDE electrode · Electrode

O2-saturated 0.5 M H2SO4; 1600 rpm; Pt loading 60 microg cm^-2.

Temperature: ~298
Atmosphere: O2-saturated electrolyte
Geometry: RRDE/glassy carbon working electrode
Context: commercial Pt/C control
Measurement source: p. 6 · 3.2 · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR half-wave potential E1/2	0.835 V at 1600 rpm	0.835 V vs RHE	—	Text Exact Reported	p. 6 · 3.2 · Fig. 4a
mass activity at 0.9 V	0.0583 A mg^-1	0.0583 A/mg	—	Text Exact Reported	p. 6 · 3.2

RRDE electron-transfer number and H2O2 yield

Pt3(C12N6O6)2 MOF RRDE electrode · Electrode

Ring current at 1.3 V vs RHE; collection efficiency N = 0.40; O2-saturated 0.5 M H2SO4.

Temperature: ~298
Atmosphere: O2-saturated electrolyte
Geometry: RRDE
Context: MOF catalyst ink on electrode
Measurement source: p. 3 and p. 7 · 2.7; 3.2 · Fig. 4d; Fig. S11

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
H2O2 yieldMarked as a best value within this paper	under 1.47 %	1.47 %	—	Text Approximate	p. 7 · 3.2 · Fig. 4d; Fig. S11
electron transfer number n	n = 3.96	—	—	Text Exact Reported	p. 1 · Abstract
electron transfer number nMarked as a best value within this paper	n = 3.98	—	—	Text Exact Reported	p. 7 · 3.2 · Fig. 4d; Fig. S11

Tafel analysis for ORR

Tafel and polarisation analysis

Pt3(C12N6O6)2 MOF RRDE electrode · Electrode

Tafel plot comparing Pt3(C12N6O6)2 MOF and Pt/C in acidic ORR conditions.

Atmosphere: O2-purged/electrolyte context
Geometry: electrode catalyst ink
Context: MOF catalyst ink vs Pt/C control
Measurement source: p. 5 · Structural and Electrochemical Characterizations · Figure S5a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Tafel slopeMarked as a best value within this paper	52 mV decade^-1	—	—	Figure Axis Rounded Reported	p. 5 · Structural and Electrochemical Characterizations · Figure S5a
Tafel slope for Pt/C control	59 mV decade^-1	—	—	Figure Axis Rounded Reported	p. 5 · Structural and Electrochemical Characterizations · Figure S5a