Electrochemistry Application — Ultrathin two-dimensional π-d conjugated coordination polymer Co3(hexaaminobenzene)2 nanosheets for highly efficient oxygen evolution

5 measurement groups · 30 results

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

CV-derived double-layer capacitance

Voltammetry

Co-HAB-NSs · Nanosheet

CV scan rates from 30 to 80 mV s-1; current density at 1.05 V plotted against scan rate; fitted slope is twice Cdl.

Atmosphere: 1 M KOH electrolyte
Geometry: glassy carbon rotating disk electrode
Context: target sample compared with Co-HAB-NSs-2, bulk Co-HAB, and Co-HAB-C
Measurement source: p010 / article p378 · Electrochemical measurements · Fig. 6b and Fig. S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Double-layer capacitance of bulk Co-HAB	1.56 mF cm-2	—	—	Figure Axis Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 6b
Double-layer capacitance of Co-HAB-C	1.13 mF cm-2	—	—	Figure Axis Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 6b
Double-layer capacitance of Co-HAB-NSsMarked as a best value within this paper	21.71 mF cm-2	—	—	Figure Axis Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 6b
Double-layer capacitance of Co-HAB-NSs-2	11.28 mF cm-2	—	—	Figure Axis Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 6b
Area-specific activity order by j/CdlMarked as a best value within this paper	Co-HAB-NSs > Co-HAB-C > Co-HAB-NSs-2 > bulk Co-HAB	—	—	Text Qualitative	p007 / article p375 · Electrocatalytic performance · Fig. 6c

chronoamperometry / j-t durability

Chronoamperometry

Co-HAB-NSs · Nanosheet

Current-time curves for Co-HAB-NSs and RuO2 at 1.75 V; durability evaluated for 10 h.

Atmosphere: 1 M KOH electrolyte
Geometry: glassy carbon rotating disk electrode
Context: target sample compared with RuO2 benchmark
Measurement source: p007 / article p375 · Electrocatalytic performance · Fig. 6d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Co-HAB-NSs durability test duration	10 hours	—	—	Text Exact Reported	p007 / article p375 · Electrocatalytic performance · Fig. 6d
Applied potential for durability test	1.75 V	—	—	Text Exact Reported	p006-p007 / article pp374-375 · Electrocatalytic performance · Fig. 6d
Co-HAB-NSs current stabilityMarked as a best value within this paper	current density remains steady and is much better than RuO2	—	—	Text Qualitative	p007 / article p375 · Electrocatalytic performance · Fig. 6d

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

Co-HAB-NSs · Nanosheet

EIS from 0.1 Hz to 100 kHz at open circuit voltage.

Geometry: glassy carbon rotating disk electrode for catalyst film
Context: target sample compared with Co-HAB-NSs-2, bulk Co-HAB, and Co-HAB-C
Measurement source: p010 / article p378 · Electrochemical measurements · Fig. S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Charge-transfer resistance comparisonMarked as a best value within this paper	Co-HAB-NSs charge-transfer resistance is much smaller than Co-HAB-NSs-2, bulk Co-HAB and Co-HAB-C	—	—	Text Qualitative	p006 / article p374 · Electrocatalytic performance · Fig. S8

LSV and Tafel analysis

Voltammetry Tafel and polarisation analysis

Co-HAB-NSs · Nanosheet

1 M aqueous KOH, three-electrode cell with Ag/AgCl reference and Pt wire counter; catalyst ink on polished glassy carbon RDE, 0.5 mg cm-2 loading; LSV at 5 mV s-1 and 1600 rpm; potentials converted to RHE.

Geometry: glassy carbon rotating disk electrode, 5 mm diameter
Context: pristine Co-HAB nanosheets and controls
Measurement source: p010 / article p378 · Electrochemical measurements · Fig. 4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER onset potential of bulk Co-HAB at 1 mA cm-2	1.57 V vs RHE	—	—	Text Exact Reported	p004 / article p372 · Electrocatalytic performance · Fig. 4a
OER onset potential of Co-HAB-NSs at 1 mA cm-2	1.46 V vs RHE	—	—	Text Exact Reported	p004 / article p372 · Electrocatalytic performance · Fig. 4a
OER onset potential of RuO2 at 1 mA cm-2Marked as a best value within this paper	1.43 V vs RHE	—	—	Text Exact Reported	p004 / article p372 · Electrocatalytic performance · Fig. 4a
OER overpotential of bulk Co-HAB at 10 mA cm-2	410 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4a
OER overpotential of Co-HAB-C at 10 mA cm-2	320 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4a
OER overpotential of Co-HAB-NSs at 10 mA cm-2Marked as a best value within this paper	310 mV @ 10 mA cm-2	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4a
OER overpotential of Co-HAB-NSs-2 at 10 mA cm-2	350 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4a
OER overpotential of RuO2 at 10 mA cm-2	325 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4a
Table S1 Co-HAB ultrathin nanosheet overpotential	310@10 mA cm-2	—	—	SI Table Exact Reported	p011 · Table 1 · Table S1
Table S1 Co-HAB ultrathin nanosheet Tafel slope	56 mV dec-1	—	—	SI Table Exact Reported	p011 · Table 1 · Table S1
Tafel slope of bulk Co-HAB	88 mV dec-1	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4b
Tafel slope of Co-HAB-C	60 mV dec-1	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4b
Tafel slope of Co-HAB-NSsMarked as a best value within this paper	56 mV dec-1	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4b
Tafel slope of Co-HAB-NSs-2	108 mV dec-1	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4b
Tafel slope of RuO2	119 mV dec-1	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 4b

LSV and Tafel analysis

Voltammetry Tafel and polarisation analysis

Co-HAB-NP · Powder

Morphology-control OER comparison of Co-HAB-NP, Co-HAB-S, Co-HAB-HNs, and bulk Co-HAB under the same electrochemical protocol.

Geometry: glassy carbon rotating disk electrode
Context: pristine morphology-control samples
Measurement source: p005 / article p373 · Electrocatalytic performance · Fig. 5g-i

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
OER overpotential of Co-HAB-HNsMarked as a best value within this paper	330 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 5g,i
OER overpotential of Co-HAB-NP	350 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 5g,i
OER overpotential of Co-HAB-S	360 mV	—	—	Text Exact Reported	p005 / article p373 · Electrocatalytic performance · Fig. 5g,i
Tafel slope of Co-HAB-HNs	155 mV dec-1	—	—	Text Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 5h
Tafel slope of Co-HAB-NPMarked as a best value within this paper	119 mV dec-1	—	—	Text Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 5h
Tafel slope of Co-HAB-S	133 mV dec-1	—	—	Text Exact Reported	p006 / article p374 · Electrocatalytic performance · Fig. 5h