cMOF Evidence Base
Electrochemistry Application — Conductive metal–Organic frameworks endow high-efficient oxygen evolution of La0·6Sr0·4Co0·8Fe0·2O3 perovskite oxide nanofibers

Measurement evidence

Electrochemistry Application

Conductive metal–Organic frameworks endow high-efficient oxygen evolution of La0·6Sr0·4Co0·8Fe0·2O3 perovskite oxide nanofibers · Li Z., Li J.-G., Ao X. et al. · Electrochimica Acta · 2020 · 135638

13 measurement groups · 40 results

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

Supplementary LSV acetylene-black control

Voltammetry

pure acetylene black · Powder

Rendered SI Fig. S8 compares pure acetylene black, LSCF@Ni3(HITP)2-2 and LSCF@Ni3(HITP)2-2 plus acetylene black.

Temperature
room temperature
Atmosphere
O2-saturated alkaline electrolyte, matching main OER tests
Geometry
glassy carbon catalyst electrode
Context
Carbon additive control versus target composite.
Measurement source
6 · Supporting Information · Fig. S8
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Pure acetylene black has negligible OER current in SI LSV controlPure acetylene black curve remains near baseline through most of the 1.2-1.8 V vs RHE window; LSCF@Ni3(HITP)2-2 and the AB-containing composite show high OER current.——Visual Estimate
Qualitative		6 · Supporting Information · Fig. S8

Double-layer capacitance from non-Faradaic CV

Voltammetry

LSCF@Ni3(HITP)2-2 · Powder

CV curves in non-Faradaic range 1.15-1.25 V vs RHE at scan rates 20, 40, 60, 80, 100 and 120 mV s-1; Cdl derived from ja-jc slope at 1.2 V vs RHE.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
RDE glassy carbon catalyst electrode
Context
Composite and controls compared.
Measurement source
3 · 2.6 Electrochemical characterizations · Fig. 4d and Fig. S9
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Cdl of acetylene black control0.69 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. S10
Cdl of LSCF1.5 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. 4d
Cdl of LSCF@Ni3(HITP)2-18.1 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. 4d
Cdl of LSCF@Ni3(HITP)2-2Marked as a best value within this paper15.1 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. 4d
Cdl of LSCF@Ni3(HITP)2-34.9 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. 4d
Cdl of LSCF@Ni3(HITP)2-42.9 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. 4d
Cdl of Ni3(HITP)21.4 mF cm-2——Text
Rounded Reported		7 · Results and discussion · Fig. 4d

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

LSCF@Ni3(HITP)2-2 · Powder

EIS at 1.55 V vs RHE, 100 kHz to 0.1 Hz, AC voltage 5 mV; Rct extracted from Randles circuit.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
RDE glassy carbon catalyst electrode
Context
Composite and controls compared.
Measurement source
3 · 2.6 Electrochemical characterizations · Fig. 4e
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Charge-transfer resistance of LSCF49.5 ohm——Text
Rounded Reported		7 · Results and discussion · Fig. 4e
Charge-transfer resistance of LSCF@Ni3(HITP)2-110.1 ohm——Text
Rounded Reported		7 · Results and discussion · Fig. 4e
Charge-transfer resistance of LSCF@Ni3(HITP)2-2Marked as a best value within this paper8.3 ohm——Text
Rounded Reported		7 · Results and discussion · Fig. 4e
Charge-transfer resistance of LSCF@Ni3(HITP)2-310.5 ohm——Text
Rounded Reported		7 · Results and discussion · Fig. 4e
Charge-transfer resistance of LSCF@Ni3(HITP)2-416.8 ohm——Text
Rounded Reported		7 · Results and discussion · Fig. 4e
Charge-transfer resistance of Ni3(HITP)2135.8 ohm——Text
Rounded Reported		7 · Results and discussion · Fig. 4e

OER mass activity comparison

LSCF@Ni3(HITP)2-2 · Powder

Mass activity at overpotential 0.35 V, equivalent to 1.58 V vs RHE, from Fig. S7.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
RDE glassy carbon catalyst electrode
Context
Composite and controls compared.
Measurement source
6 · Results and discussion · Fig. S7
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Mass activity of LSCF at 0.35 V overpotential42 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7
Mass activity of LSCF@Ni3(HITP)2-1 at 0.35 V overpotential111 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7
Mass activity of LSCF@Ni3(HITP)2-2 at 0.35 V overpotentialMarked as a best value within this paper143 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7
Mass activity of LSCF@Ni3(HITP)2-3 at 0.35 V overpotential94 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7
Mass activity of LSCF@Ni3(HITP)2-4 at 0.35 V overpotential66 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7
Mass activity of Ni3(HITP)2 at 0.35 V overpotential23 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7
Mass activity of RuO2 at 0.35 V overpotential98 A g-1——Text
Rounded Reported		6 · Results and discussion · Fig. S7

RDE linear sweep voltammetry for OER

Voltammetry

LSCF NFs · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1 from 1.0 to 1.8 V vs RHE; iR-corrected; catalyst loading about 0.306 mg_total cm-2.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, 0.196 cm2, rotating disk electrode
Context
Pristine LSCF control.
Measurement source
3 · 2.6 Electrochemical characterizations · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
LSCF overpotential at 10 mA cm-2345 mV0.345 V—Text
Rounded Reported		6 · Results and discussion · Fig. 4b

RDE linear sweep voltammetry for OER

Voltammetry

LSCF@Ni3(HITP)2-1 · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1; same mass loading as other catalysts.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, rotating disk electrode
Context
Composite variant.
Measurement source
6 · Results and discussion · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
LSCF@Ni3(HITP)2-1 overpotential at 10 mA cm-2284 mV0.284 V—Text
Rounded Reported		6 · Results and discussion · Fig. 4b

RDE linear sweep voltammetry for OER

Voltammetry

LSCF@Ni3(HITP)2-2 · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1; same mass loading as other catalysts.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, rotating disk electrode
Context
Best composite variant.
Measurement source
6 · Results and discussion · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Acetylene black OER controlPure acetylene black shows very poor, negligible OER activity; LSCF@Ni3(HITP)2-2 + AB is worse/comparable to LSCF@Ni3(HITP)2-2.——Qualitative
Qualitative		6 · Results and discussion · Fig. S8
LSCF@Ni3(HITP)2-2 overpotential at 10 mA cm-2Marked as a best value within this paper272 mV0.272 V—Text
Rounded Reported		6 · Results and discussion · Fig. 4b

RDE linear sweep voltammetry for OER

Voltammetry

LSCF@Ni3(HITP)2-3 · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1; same mass loading as other catalysts.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, rotating disk electrode
Context
Composite variant.
Measurement source
6 · Results and discussion · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
LSCF@Ni3(HITP)2-3 overpotential at 10 mA cm-2296 mV0.296 V—Text
Rounded Reported		6 · Results and discussion · Fig. 4b

RDE linear sweep voltammetry for OER

Voltammetry

LSCF@Ni3(HITP)2-4 · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1; same mass loading as other catalysts.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, rotating disk electrode
Context
Composite variant.
Measurement source
6 · Results and discussion · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
LSCF@Ni3(HITP)2-4 overpotential at 10 mA cm-2321 mV0.321 V—Text
Rounded Reported		6 · Results and discussion · Fig. 4b

RDE linear sweep voltammetry for OER

Voltammetry

bare Ni3(HITP)2 · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1; same mass loading as other catalysts.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, rotating disk electrode
Context
Bare conductive MOF control.
Measurement source
5 · Results and discussion · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Ni3(HITP)2 overpotential at 10 mA cm-2378 mV0.378 V—Text
Rounded Reported		1 · Abstract · Fig. 4b

RDE linear sweep voltammetry for OER

Voltammetry

RuO2 benchmark catalyst · Powder

O2-saturated 1.0 M KOH, 1600 rpm, scan rate 5 mV s-1; same mass loading as other catalysts.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
5 mm glassy carbon disk, rotating disk electrode
Context
Commercial RuO2 benchmark.
Measurement source
6 · Results and discussion · Fig. 4a-b
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
RuO2 overpotential at 10 mA cm-2314 mV0.314 V—Text
Rounded Reported		6 · Results and discussion · Fig. 4b

Chronoamperometry/chronopotentiometry durability and post-test XRD/TEM

X-ray diffraction and scatteringTransmission electron microscopyGalvanostatic cyclingChronoamperometry

LSCF@Ni3(HITP)2-2 · Powder

12 h test at 10 mA cm-2 in 1 M KOH; LSV before/after, XRD and TEM after stability test.

Temperature
room temperature
Atmosphere
O2-saturated/alkaline OER
Geometry
RDE glassy carbon catalyst electrode
Context
Best composite variant.
Measurement source
7 · Results and discussion · Fig. 4f, Fig. S11 and Fig. S12
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Post-stability structure retentionNo distinguishable difference versus fresh sample by XRD and TEM after 12 h stability test.——Qualitative
Qualitative		7 · Results and discussion · Fig. S11 and Fig. S12
Stability decay after 12 h2.9%0.029 fraction—Text
Rounded Reported		7 · Results and discussion · Fig. 4f
Overpotential increase after 12 h by LSV9 mV0.009 V—Text
Rounded Reported		7 · Results and discussion · Fig. 4f inset
Potential increase after 12 h continuous test8 mV0.008 V—Text
Rounded Reported		7 · Results and discussion · Fig. 4f

Tafel analysis from OER LSV

VoltammetryTafel and polarisation analysis

LSCF@Ni3(HITP)2-2 · Powder

Tafel slopes from corresponding OER polarisation curves in 1.0 M KOH, Fig. 4c.

Temperature
room temperature
Atmosphere
O2-saturated
Geometry
RDE glassy carbon catalyst electrode
Context
Composite and controls compared.
Measurement source
6 · Results and discussion · Fig. 4c
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
Tafel slope of LSCF188 mV dec-1——Text
Rounded Reported		7 · Results and discussion · Fig. 4c
Tafel slope of LSCF@Ni3(HITP)2-1115 mV dec-1——Figure Axis
Rounded Reported		6 · Figure 4 · Fig. 4c
Tafel slope of LSCF@Ni3(HITP)2-2Marked as a best value within this paper95 mV dec-1——Text
Rounded Reported		7 · Results and discussion · Fig. 4c
Tafel slope of LSCF@Ni3(HITP)2-3121 mV dec-1——Figure Axis
Rounded Reported		6 · Figure 4 · Fig. 4c
Tafel slope of LSCF@Ni3(HITP)2-4133 mV dec-1——Figure Axis
Rounded Reported		6 · Figure 4 · Fig. 4c
Tafel slope of Ni3(HITP)2197 mV dec-1——Text
Rounded Reported		7 · Results and discussion · Fig. 4c
Tafel slope of RuO2129 mV dec-1——Text
Rounded Reported		7 · Results and discussion · Fig. 4c