Electrochemistry Application — Copper-cobalt bimetallic conductive metal–organic frameworks as bifunctional oxygen electrocatalyst in alkaline and neutral media

4 measurement groups · 41 results

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

RDE three-electrode OER/ORR LSV, CV, EIS and chronoamperometry

Impedance spectroscopy Voltammetry Chronoamperometry

Cu3(HITP)2/Nafion glassy-carbon working electrode · Electrode

Alkaline 0.1 M KOH; oxygen-saturated for ORR/OER after O2 bubbling; LSV at 5 mV s-1; EIS 10^-2 to 10^5 Hz with +/-5 mV amplitude; potentials converted to RHE.

Atmosphere: O2-saturated for ORR/OER; N2-saturated electrolyte for ECSA CV
Geometry: Rotating disk electrode in three-electrode cell; Hg/HgO or Ag/AgCl reference, carbon rod counter electrode.
Context: Nafion/glassy-carbon electrode made from pristine Cu3(HITP)2 control
Measurement source: main p.5 · Electrochemical performance · Fig. 4; Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Alkaline electrochemical double-layer capacitance	0.41 mF cm^-2	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4c; Fig. S8
Alkaline bifunctional ORR/OER potential difference	1.22 V	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. S11a
Alkaline OER potential at 10 mA cm^-2	1.83 V vs RHE	—	—	Text Exact Reported	main p.3 · Electrochemical performance · Fig. 4a
Alkaline OER Tafel slope	329.2 mV dec^-1	—	—	Text Exact Reported	main p.3 · Electrochemical performance · Fig. 4b
Alkaline ORR CV reduction peak potential	0.52 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. S9
Alkaline ORR half-wave potential	0.61 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4d
Alkaline ORR onset potential	0.71 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4d
Alkaline ORR Tafel slope	101.2 mV dec^-1	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4e
Alkaline chronoamperometry current retention after 8000 s	32.86%	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 6a

RDE three-electrode OER/ORR LSV, CV, EIS and chronoamperometry

Impedance spectroscopy Voltammetry Chronoamperometry

Cu3(HITP)2/Nafion glassy-carbon working electrode · Electrode

Neutral 0.1 M PBS; oxygen-saturated for ORR/OER after O2 bubbling; LSV at 5 mV s-1; EIS 10^-2 to 10^5 Hz with +/-5 mV amplitude; potentials converted to RHE.

Atmosphere: O2-saturated for ORR/OER; N2-saturated electrolyte for ECSA CV
Geometry: Rotating disk electrode in three-electrode cell.
Context: Nafion/glassy-carbon electrode made from pristine Cu3(HITP)2 control
Measurement source: main p.6 · Electrochemical performance · Fig. 5; Fig. 6b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Neutral electrochemical double-layer capacitance	0.04 mF cm^-2	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5c; Fig. S12
Neutral bifunctional ORR/OER potential difference	1.67 V	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. S11b
Neutral OER potential at 10 mA cm^-2	1.95 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 5a
Neutral OER Tafel slope	397.3 mV dec^-1	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 5b
Neutral ORR CV reduction peak potential	0.33 V vs RHE	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. S13
Neutral ORR half-wave potential	0.28 V vs RHE	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5d
Neutral ORR onset potential	0.64 V vs RHE	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5d
Neutral ORR Tafel slope	347.6 mV dec^-1	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5e
Neutral chronoamperometry current retention after 8000 s	28.81%	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 6b

RDE three-electrode OER/ORR LSV, CV, EIS and chronoamperometry

Impedance spectroscopy Voltammetry Chronoamperometry

CuCo-HITP/Nafion glassy-carbon working electrode · Electrode

Alkaline 0.1 M KOH; oxygen-saturated for ORR/OER after O2 bubbling; LSV at 5 mV s-1; EIS 10^-2 to 10^5 Hz with +/-5 mV amplitude; potentials converted to RHE.

Atmosphere: O2-saturated for ORR/OER; N2-saturated electrolyte for ECSA CV
Geometry: Rotating disk electrode in three-electrode cell; Hg/HgO or Ag/AgCl reference, carbon rod counter electrode.
Context: Nafion/glassy-carbon electrode made from mixed-metal CuCo-HITP target
Measurement source: main p.5 · Electrochemical performance · Fig. 4; Fig. 6a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Alkaline ORR limiting-current response to RDE rotation speed	Limiting current density increased with rotation speed from 400 to 2025 rpm, indicating kinetically controlled ORR catalysis for Cu3(HITP)2 and CuCo-HITP.	—	—	Text Qualitative	main p.5 · Electrochemical performance · Fig. S10
Alkaline electrochemical double-layer capacitanceMarked as a best value within this paper	0.59 mF cm^-2	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4c; Fig. S8
Alkaline bifunctional ORR/OER potential differenceMarked as a best value within this paper	0.94 V	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. S11a
Alkaline EIS charge-transfer resistance comparisonMarked as a best value within this paper	Rct of CuCo-HITP was significantly smaller than that of Cu3(HITP)2	—	—	Qualitative Qualitative	main p.5 · Electrochemical performance · Fig. 4f
Alkaline OER potential at 10 mA cm^-2Marked as a best value within this paper	1.63 V vs RHE	—	—	Text Exact Reported	main p.3 · Electrochemical performance · Fig. 4a
Alkaline OER Tafel slopeMarked as a best value within this paper	122.3 mV dec^-1	—	—	Text Exact Reported	main p.3 · Electrochemical performance · Fig. 4b
Alkaline ORR CV reduction peak potentialMarked as a best value within this paper	0.58 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. S9
Alkaline ORR half-wave potentialMarked as a best value within this paper	0.69 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4d
Alkaline ORR onset potentialMarked as a best value within this paper	0.79 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4d
Alkaline ORR Tafel slopeMarked as a best value within this paper	96.4 mV dec^-1	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 4e
Alkaline chronoamperometry current retention after 8000 sMarked as a best value within this paper	88.18%	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 6a

RDE three-electrode OER/ORR LSV, CV, EIS and chronoamperometry; post-test SEM/TEM/PXRD/FT-IR

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

CuCo-HITP/Nafion glassy-carbon working electrode · Electrode

Neutral 0.1 M PBS; oxygen-saturated for ORR/OER after O2 bubbling; LSV at 5 mV s-1; EIS 10^-2 to 10^5 Hz with +/-5 mV amplitude; potentials converted to RHE.

Atmosphere: O2-saturated for ORR/OER; N2-saturated electrolyte for ECSA CV
Geometry: Rotating disk electrode in three-electrode cell.
Context: Nafion/glassy-carbon electrode made from mixed-metal CuCo-HITP target
Measurement source: main p.6 · Electrochemical performance · Fig. 5; Fig. 6b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
CuCo-HITP after i-t test SEM/FT-IR stabilityMarked as a best value within this paper	No significant change in morphology or absorption peaks after stability testing	—	—	Qualitative Qualitative	main p.6 · Electrochemical performance · Figs. S16-S18
Neutral electrochemical double-layer capacitanceMarked as a best value within this paper	0.12 mF cm^-2	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5c; Fig. S12
Neutral bifunctional ORR/OER potential differenceMarked as a best value within this paper	1.41 V	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. S11b
Neutral EIS charge-transfer resistance comparisonMarked as a best value within this paper	CuCo-HITP displayed a smaller charge-transfer impedance than Cu3(HITP)2	—	—	Qualitative Qualitative	main p.6 · Electrochemical performance · Fig. 5f
Neutral OER potential at 10 mA cm^-2Marked as a best value within this paper	1.78 V vs RHE	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 5a
Neutral OER Tafel slopeMarked as a best value within this paper	276.1 mV dec^-1	—	—	Text Exact Reported	main p.5 · Electrochemical performance · Fig. 5b
Neutral ORR CV reduction peak potentialMarked as a best value within this paper	0.35 V vs RHE	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. S13
Neutral ORR half-wave potentialMarked as a best value within this paper	0.37 V vs RHE	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5d
Neutral ORR onset potentialMarked as a best value within this paper	0.72 V vs RHE	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5d
Neutral ORR Tafel slopeMarked as a best value within this paper	319.3 mV dec^-1	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 5e
Neutral chronoamperometry current retention after 8000 sMarked as a best value within this paper	99.88%	—	—	Text Exact Reported	main p.6 · Electrochemical performance · Fig. 6b
CuCo-HITP post-catalysis morphology stabilityMarked as a best value within this paper	No significant change in morphology after catalysis tests	—	—	Qualitative Qualitative	main p.6 · Electrochemical performance · Figs. S14 and S15