Electrochemistry Application — Regulating Electronic Structure of Bimetallic NiFe-THQ Conductive Metal–Organic Frameworks to Boost Catalytic Activity for Oxygen Evolution Reaction

6 measurement groups · 41 results

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

cyclic voltammetry double-layer capacitance and ECSA

Voltammetry

NixFe1-x-THQ series · Powder

CV in non-Faradaic region 1.223-1.323 V vs RHE at 5, 10, 15, 20, 25 mV s-1; Cs defined as 0.04 mF cm-2.

Geometry: glassy carbon electrode
Context: c-MOF catalyst ink
Measurement source: p005 · 2.2 Electrochemical Performances · Figure 3c-d; Figure S12-S13

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe-THQ Cdl	0.552 mF cm-2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3c; Figure S13
Ni0.2Fe0.8-THQ Cdl	0.659 mF cm-2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3c; Figure S13
Ni0.5Fe0.5-HHTP Cdl	0.378 mF cm-2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3c; Figure S13
Ni0.5Fe0.5-THQ CdlMarked as a best value within this paper	0.852 mF cm-2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3c; Figure S13
Ni0.8Fe0.2-THQ Cdl	0.714 mF cm-2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3c; Figure S13
Ni-THQ Cdl	0.385 mF cm-2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3c; Figure S13
Fe-THQ ECSA	13.8 cm2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3d inset
Ni0.2Fe0.8-THQ ECSA	16.48 cm2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3d inset
Ni0.5Fe0.5-HHTP ECSA	9.45 cm2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3d inset
Ni0.5Fe0.5-THQ ECSAMarked as a best value within this paper	21.25 cm2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3d inset
Ni0.8Fe0.2-THQ ECSA	17.85 cm2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3d inset
Ni-THQ ECSA	9.63 cm2	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3d inset

mass activity and TOF calculation

NixFe1-x-THQ series · Powder

Calculated at overpotential eta = 300 mV using deposited catalyst/metal mass from ICP and assuming all metal atoms active.

Geometry: glassy carbon electrode
Context: c-MOF catalyst ink
Measurement source: p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe-THQ mass activity at eta=300 mV	0.59 mA mg-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e
Ni0.2Fe0.8-THQ mass activity at eta=300 mV	48.2 mA mg-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e
Ni0.5Fe0.5-THQ mass activity at eta=300 mVMarked as a best value within this paper	175 mA mg-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e
Ni0.8Fe0.2-THQ mass activity at eta=300 mV	102.1 mA mg-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e
Ni-THQ mass activity at eta=300 mV	22.9 mA mg-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e
Fe-THQ TOF at eta=300 mV	8.1e-05 s-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14
Ni0.2Fe0.8-THQ TOF at eta=300 mV	0.0073 s-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14
Ni0.5Fe0.5-HHTP TOF at eta=300 mV	0.00028 s-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14
Ni0.5Fe0.5-THQ TOF at eta=300 mVMarked as a best value within this paper	0.026 s-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14
Ni0.8Fe0.2-THQ TOF at eta=300 mV	0.015 s-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14
Ni-THQ TOF at eta=300 mV	0.00316 s-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3e; Figure S14

linear sweep voltammetry

Voltammetry

NixFe1-x-THQ series · Powder

1.0 M KOH, three-electrode cell, no iR compensation, LSV scan rate 5 mV s-1; catalyst ink on glassy carbon electrode.

Geometry: glassy carbon working electrode, Pt counter, Ag/AgCl reference
Context: c-MOF catalyst ink
Measurement source: p005 · 2.2 Electrochemical Performances · Figure 3a; Figure S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Fe-THQ overpotential at 10 mA cm-2	436 mV	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3a
Ni0.2Fe0.8-THQ overpotential at 10 mA cm-2	309 mV	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3a
Ni0.5Fe0.5-THQ overpotential at 10 mA cm-2Marked as a best value within this paper	272 mV	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3a
Ni0.8Fe0.2-THQ overpotential at 10 mA cm-2	288 mV	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3a
Ni-THQ overpotential at 10 mA cm-2	374 mV	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3a
Ni0.5Fe0.5-THQ Ni2+/Ni3+ oxidation peak	1.47 V vs RHE	—	—	Text Approximate	p005 · 2.2 Electrochemical Performances · Figure S10
Ni0.8Fe0.2-THQ Ni2+/Ni3+ oxidation peak	1.44 V vs RHE	—	—	Text Rounded Reported	p005 · 2.2 Electrochemical Performances · Figure S10
Ni-THQ Ni2+/Ni3+ oxidation peak	1.4 V vs RHE	—	—	Text Rounded Reported	p005 · 2.2 Electrochemical Performances · Figure S10

OER comparison

commercial RuO2 · Powder

Commercial RuO2 compared under 1.0 M KOH OER testing.

Geometry: glassy carbon electrode
Context: RuO2 reference catalyst ink
Measurement source: p005 · 2.2 Electrochemical Performances · Figure 3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
RuO2 overpotential at 10 mA cm-2	397 mV	—	—	Figure Axis Approximate	p006 · 2.2 Electrochemical Performances · Figure 3g
RuO2 Tafel slope	141.7 mV dec-1	—	—	Figure Axis Approximate	p006 · 2.2 Electrochemical Performances · Figure 3b

chronoamperometry durability test

Chronoamperometry

Ni0.5Fe0.5-THQ · Powder

1.0 M KOH, constant voltage 1.5 V vs RHE for 40 h.

Geometry: glassy carbon electrode
Context: Ni0.5Fe0.5-THQ catalyst ink
Measurement source: p005 · 2.2 Electrochemical Performances · Figure 3f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni0.5Fe0.5-THQ chronoamperometry durationMarked as a best value within this paper	40 h	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3f
Ni0.5Fe0.5-THQ chronoamperometry voltage	1.5 V vs RHE	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3f

Tafel analysis

Tafel and polarisation analysis

NixFe1-x-THQ series · Powder

Tafel plots from low-overpotential portions of OER polarisation curves.

Geometry: glassy carbon electrode
Context: c-MOF catalyst ink
Measurement source: p005 · 2.2 Electrochemical Performances · Figure 3b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni0.5Fe0.5-THQ charge-transfer resistanceMarked as a best value within this paper	smallest charge transfer resistance	—	—	Text Qualitative	p005 · 2.2 Electrochemical Performances · Figure S11
Fe-THQ Tafel slope	98.0 mV dec-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3b
Ni0.2Fe0.8-THQ Tafel slope	56.3 mV dec-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3b
Ni0.5Fe0.5-THQ Tafel slopeMarked as a best value within this paper	47.9 mV dec-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3b
Ni0.8Fe0.2-THQ Tafel slope	58.4 mV dec-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3b
Ni-THQ Tafel slope	128.2 mV dec-1	—	—	Text Exact Reported	p005 · 2.2 Electrochemical Performances · Figure 3b