Electrochemistry Application — Conductive Metal–Organic Frameworks with Extra Metallic Sites as an Efficient Electrocatalyst for the Hydrogen Evolution Reaction

5 measurement groups · 20 results

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

Linear sweep voltammetry for HER

Voltammetry

Ni3(HITP)2 modified rotating disk electrode · Electrode

Same HER LSV conditions as target: N2-saturated 0.1 M KOH, 1600 rpm, 5 mV s-1, 95% iR correction.

Atmosphere: N2-saturated electrolyte
Geometry: 3 mm glassy carbon RDE modified with control catalyst and Nafion
Context: Ni3(HITP)2 control on RDE
Measurement source: main p.4, article p.2000012-4 · Results and Discussion · Figure 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HER overpotential at 10 mA cm-2	eta10 = 176 mV	0.176 V	—	Text Exact Reported	main p.4, article p.2000012-4 · Results and Discussion · Figure 4a
HER onset potential	51 mV	0.051 V vs RHE	—	Text Exact Reported	main p.4, article p.2000012-4 · Results and Discussion · Figure 4a

Linear sweep voltammetry for HER

Voltammetry

Ni3(Ni3.HAHATN)2 modified rotating disk electrode · Electrode

Three-electrode CHI 760E workstation; graphite counter electrode; saturated calomel reference; N2-saturated 0.1 M KOH; 1600 rpm; 5 mV s-1; 95% iR correction; potentials converted to RHE.

Atmosphere: N2-saturated electrolyte
Geometry: 3 mm glassy carbon RDE modified with catalyst and Nafion
Context: MOF catalyst on RDE with Nafion binder
Measurement source: main p.4 and p.8, article p.2000012-4 and 8 · Results and Discussion; Experimental Section · Figure 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cathodic current density at -0.15 VMarked as a best value within this paper	21.2 mA cm-2 at -0.15 V	—	—	Text Exact Reported	main p.5, article p.2000012-5 · Results and Discussion · Figure 4a-b
HER overpotential at 10 mA cm-2Marked as a best value within this paper	eta10 = 115 mV	0.115 V	—	Text Exact Reported	main p.4, article p.2000012-4 · Results and Discussion · Figure 4a; Table 1
HER onset potentialMarked as a best value within this paper	12 mV	0.012 V vs RHE	—	Text Exact Reported	main p.4, article p.2000012-4 · Results and Discussion · Figure 4a

Linear sweep voltammetry for HER across M23(M13.HAHATN)2 variants

Voltammetry

Ni3(Co3.HAHATN)2 modified rotating disk electrode · Electrode

Same LSV conditions: N2-saturated 0.1 M KOH, 1600 rpm, 5 mV s-1, 95% iR correction.

Atmosphere: N2-saturated electrolyte
Geometry: 3 mm glassy carbon RDE modified with catalyst and Nafion
Context: variant MOF catalysts on RDE
Measurement source: main p.4-5, article p.2000012-4 to 5 · Results and Discussion · Figure 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Cathodic current density at -0.15 V	1.9 mA cm-2 for Cu3(Cu3.HAHATN)2	—	—	Text Exact Reported	main p.5-6, article p.2000012-5 to 6 · Results and Discussion · Figure 4b
Cathodic current density at -0.15 V	7.6 mA cm-2 for Ni3(Co3.HAHATN)2	—	—	Text Exact Reported	main p.5-6, article p.2000012-5 to 6 · Results and Discussion · Figure 4b
Cathodic current density at -0.15 V	3.2 mA cm-2 for Ni3(Cu3.HAHATN)2	—	—	Text Exact Reported	main p.5-6, article p.2000012-5 to 6 · Results and Discussion · Figure 4b
HER overpotential at 10 mA cm-2	230 mV for Cu3(Cu3.HAHATN)2	0.23 V	—	Text Exact Reported	main p.5, article p.2000012-5 · Results and Discussion · Figure 4b
HER overpotential at 10 mA cm-2	162 mV for Ni3(Co3.HAHATN)2	0.162 V	—	Text Exact Reported	main p.4, article p.2000012-4 · Results and Discussion · Figure 4b
HER overpotential at 10 mA cm-2	207 mV for Ni3(Cu3.HAHATN)2	0.207 V	—	Text Exact Reported	main p.4, article p.2000012-4 · Results and Discussion · Figure 4b

Durability by repeated CV, chronoamperometry, post-test XRD/TEM/SEM

X-ray diffraction and scattering Scanning electron microscopy Transmission electron microscopy Voltammetry Chronoamperometry

Ni3(Ni3.HAHATN)2 modified rotating disk electrode · Electrode

HER stability in 0.1 M KOH; repeated CV for 1000 cycles; chronoamperometry at 10 and 50 mA cm-2 for 10 h.

Atmosphere: 0.1 M KOH electrolyte
Geometry: modified RDE
Context: Ni3(Ni3.HAHATN)2 catalyst on RDE
Measurement source: main p.7, article p.2000012-7 · Results and Discussion · Figure 6; Figures S27-S28

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Post-HER structural retention	XRD maintains particular crystal structure; TEM and SEM show 2D structure not broken	—	—	Qualitative Qualitative	main p.7, article p.2000012-7 · Results and Discussion · Figure 6b; Figure S28
LSV after 1000 CV cycles	only displays a tiny deformation relative to the initial scan	—	—	Qualitative Qualitative	main p.7, article p.2000012-7 · Results and Discussion · Figure S27
Current retention after 10 h at 10 mA cm-2	83.4% of initial activity	0.834 fraction	—	Text Exact Reported	main p.7, article p.2000012-7 · Results and Discussion · Figure 6a
Current retention after 10 h at 50 mA cm-2	78.6% at a high current density of 50 mA cm-2	0.786 fraction	—	Text Exact Reported	main p.7, article p.2000012-7 · Results and Discussion · Figure 6a

Tafel analysis from LSV curves

Voltammetry Tafel and polarisation analysis

Ni3(Ni3.HAHATN)2 modified rotating disk electrode · Electrode

Tafel plots of M23(M13.HAHATN)2 and Ni3(HITP)2 samples obtained from LSV curves by the Tafel equation.

Atmosphere: N2-saturated 0.1 M KOH
Geometry: modified RDE
Context: MOF catalysts on RDE
Measurement source: main p.6, article p.2000012-6 · Results and Discussion · Figure 4c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Tafel slope	112.4 mV dec-1 for Cu3(Cu3.HAHATN)2	—	—	Text Exact Reported	main p.6, article p.2000012-6 · Results and Discussion · Figure 4c
Tafel slope	98.2 mV dec-1 for Ni3(Co3.HAHATN)2	—	—	Text Exact Reported	main p.6, article p.2000012-6 · Results and Discussion · Figure 4c
Tafel slope	101.5 mV dec-1 for Ni3(Cu3.HAHATN)2	—	—	Text Exact Reported	main p.6, article p.2000012-6 · Results and Discussion · Figure 4c
Tafel slope	94.2 mV dec-1 for Ni3(HITP)2	—	—	Text Exact Reported	main p.6, article p.2000012-6 · Results and Discussion · Figure 4c
Tafel slopeMarked as a best value within this paper	45.6 mV dec-1	—	—	Text Exact Reported	main p.6, article p.2000012-6 · Results and Discussion · Figure 4c; Table 1