Electrochemistry Application — Highly Conductive Bimetallic Ni-Fe Metal Organic Framework as a Novel Electrocatalyst for Water Oxidation

3 measurement groups · 16 results

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

OER linear sweep voltammetry

Voltammetry

FeNi-DOBDC-3 · Nanosheet

Three-electrode cell, CHI 750D, Pt coil counter, Ag/AgCl saturated KCl reference, 5 mm RDE working electrode, 1.0 M O2-saturated KOH, 10 mV/s, 95% iR correction. Catalyst ink: 2 mg catalyst + 2 mg carbon black in water/ethanol/isopropanol 3:1:1 with 5 microlitre 5% Nafion; pretreated by about 20 CV scans from 1.0 to 1.8 V vs RHE at 100 mV/s.

Atmosphere: ambient; O2-saturated electrolyte
Geometry: RDE geometric area 0.196 cm2
Context: As-prepared pristine MOF catalysts tested directly; carbon black/Nafion electrode ink used for all catalysts.
Measurement source: p004 / S4 · Electrochemical measurements · Figure 4; Table S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
FeNi-DOBDC-1 overpotential at 50 mA cm-2	approximately 355 mV at 50 mA/cm2 from Figure 4b	—	visual estimate +/- 20 mV	Visual Estimate Approximate	p004 / article p.9746 · Figure 4 · Figure 4b
FeNi-DOBDC-2 overpotential at 100 mA cm-2	292 mV at 100 mA/cm2	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b; Table S2
FeNi-DOBDC-2 overpotential at 50 mA cm-2	274 mV at 50 mA/cm2	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b; Table S2
FeNi-DOBDC-3 overpotential at 100 mA cm-2Marked as a best value within this paper	287 mV at 100 mA/cm2	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b; Table S2
FeNi-DOBDC-3 overpotential at 50 mA cm-2Marked as a best value within this paper	270 mV at 50 mA/cm2	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b; Table S2
FeNi-DOBDC-3 current density at 300 mV overpotentialMarked as a best value within this paper	155.5 mA/cm2 at overpotential 300 mV	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b
FeNi-DOBDC-4 overpotential at 50 mA cm-2	approximately 320 mV at 50 mA/cm2 from Figure 4b	—	visual estimate +/- 20 mV	Visual Estimate Approximate	p004 / article p.9746 · Figure 4 · Figure 4b
RuO2 overpotential at 100 mA cm-2	454 mV at 100 mA/cm2	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b
RuO2 overpotential at 50 mA cm-2	389 mV at 50 mA/cm2	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4b

Tafel analysis for OER

Tafel and polarisation analysis

FeNi-DOBDC-3 · Nanosheet

Tafel slope calculated from E = a + b * log j using OER LSV data in 1.0 M KOH.

Atmosphere: ambient; O2-saturated KOH for LSV
Geometry: RDE electrode
Context: FeNi-DOBDC-3 compared with FeNi-DOBDC-2, Ni-MOF, Fe-complex and RuO2.
Measurement source: p005 / article p.9747 · Results and Discussion · Figure 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
FeNi-DOBDC-2 Tafel slope	52 mV/dec	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4c; Table S2
FeNi-DOBDC-3 Tafel slopeMarked as a best value within this paper	49 mV/dec	—	—	Text Exact Reported	p005-p006 / article pp.9747-9748 · Results and Discussion; Conclusions · Figure 4c; Table S2
Ni-MOF Tafel slope	84 mV/dec from Figure 4c label	—	—	Figure Axis Rounded Reported	p004 / article p.9746 · Figure 4 · Figure 4c
RuO2 Tafel slope	62 mV/dec	—	—	Text Exact Reported	p005 / article p.9747 · Results and Discussion · Figure 4c

Accelerated durability test, chronopotentiometry, post-OER XPS/HRTEM

X-ray photoelectron spectroscopy Transmission electron microscopy Galvanostatic cycling

FeNi-DOBDC-3 · Nanosheet

ADT by continuous CV scanning; chrono measurement at eta = 278 mV for 12 h without iR compensation; post-test XPS/HRTEM after OER catalysis at 15 mA cm-2 for 1 h.

Atmosphere: 1.0 M KOH
Geometry: RDE catalyst electrode
Context: Optimised FeNi-DOBDC-3 stability.
Measurement source: p006 / article p.9748 · Results and Discussion · Figures 4f, 5, S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Post-OER crystal structure retention	HRTEM images before and after electrochemical testing show crystal structure has almost no change	—	—	Text Qualitative	p006 / article p.9748 · Results and Discussion · Figure S8
FeNi-DOBDC-3 chronopotentiometric stability duration	12 h at eta = 278 mV without iR compensation with negligible loss	—	—	Text Exact Reported	p006 / article p.9748 · Results and Discussion · Figure 5a
FeNi-DOBDC-3 accelerated durability cycling	almost no catalytic performance degradation after 10000 potential cycles	—	—	Text Exact Reported	p006 / article p.9748 · Results and Discussion · Figure 4f