Electrochemistry Application — Bioinspired fiber-like porous Cu/N/C electrocatalyst facilitating electron transportation toward oxygen reaction for metal-air batteries

13 measurement groups · 22 results

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

RDE linear sweep voltammetry

Voltammetry

Cu/C · Powder

0.1 M KOH O2-saturated; scan rate 5 mV s-1; 1600 rpm; catalyst loading 0.1 mg cm-2.

Atmosphere: O2-saturated electrolyte
Geometry: Rotating disk electrode, glassy carbon D = 5 mm
Context: Derived-carbon Cu/C control catalyst.
Measurement source: p004 / 15822 · Results and discussion · Fig. 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR onset potential	0.81 V	0.81 V vs RHE	—	Text Exact Reported	p004 / 15822 · Results and discussion · Fig. 4b

Primary aluminium-air battery discharge and rate test

CuNC (MOF) air cathode · Electrode

Al alloy anode; air cathode; electrolyte 6.00 M KOH, 0.01 M Na2SnO3, 0.50 mM In(OH)3, 7.50 mM ZnO; discharge at 50 mA cm-2 and rates 50-200 mA cm-2.

Atmosphere: Air electrode
Geometry: Home-made aluminium-air cell
Context: Composite air cathode using target catalyst.
Measurement source: p006 / 15824 · Results and discussion · Fig. 6b,c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Battery rate-test maximum current density	200 mA cm-2	200 mA cm-2	—	Text Exact Reported	p002 / 15820 · Experimental - Electrochemical measurements
Battery rate-test minimum current density	50 mA cm-2	50 mA cm-2	—	Text Exact Reported	p002 / 15820 · Experimental - Electrochemical measurements
Aluminium-air discharge duration at reported voltageMarked as a best value within this paper	over 4000 seconds	4000 s	>	Text Approximate	p006 / 15824 · Results and discussion · Fig. 6b
Aluminium-air discharge voltage at 50 mA cm-2Marked as a best value within this paper	1.37 V for over 4000 s	1.37 V	—	Text Exact Reported	p006 / 15824 · Results and discussion · Fig. 6b
Discharge voltage advantage over commercial Pt/CMarked as a best value within this paper	0.05 V higher	0.05 V	—	Text Exact Reported	p006 / 15824 · Results and discussion · Fig. 6b
Peak power densityMarked as a best value within this paper	138 mW cm-2 at current densities of 150 and 160 mA cm-2	138 mW cm-2	—	Text Exact Reported	p006 / 15824 · Results and discussion · Fig. 6c

CV capacitive measurements

Voltammetry

CuNC (MOF) · Powder

Same electrochemical systems; N2-saturated electrolyte; scan rates 20, 50, 100, 200 mV s-1.

Atmosphere: N2-saturated electrolyte
Geometry: Electrochemical catalyst electrode
Context: Target fibre-like catalyst.
Measurement source: p005 / 15823 · Results and discussion · Fig. 5d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Faradaic redox peaks in capacitive CV	No special faradaic redox peaks	—	—	Text Qualitative	p006 / 15824 · Results and discussion · Fig. 5c,d
Specific capacitance comparisonMarked as a best value within this paper	CuNC (MOF) showed higher specific capacitance than nanoparticle catalyst	—	—	Qualitative Qualitative	p006 / 15824 · Results and discussion · Fig. 5c,d

Cyclic voltammetry (CV)

Voltammetry

CuNC (MOF) · Powder

0.1 M KOH aqueous solution saturated with N2 or O2; glassy carbon working electrode; Pt counter; Ag/AgCl reference; catalyst loading 0.1 mg cm-2.

Atmosphere: N2 and O2 saturated electrolyte
Geometry: Three-electrode glassy carbon electrode, D = 5 mm
Context: Target catalyst in ink.
Measurement source: p002 / 15820 · Experimental - Electrochemical measurements · Fig. 4a

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
N2 CV redox peaks	No significant peaks	—	—	Text Qualitative	p004 / 15822 · Results and discussion · Fig. 4a
O2 reduction peak potential	0.75 V	0.75 V vs RHE	—	Text Exact Reported	p004 / 15822 · Results and discussion · Fig. 4a

ORR chronoamperometry

Chronoamperometry

CuNC (MOF) · Powder

Constant voltage 0.67 V vs RHE in 0.1 M KOH; continuous testing to 13000 s.

Geometry: Electrochemical catalyst electrode
Context: Target catalyst compared against CuNC NPs and Pt/C.
Measurement source: p006 · S5 · Figure S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current retention after 13000 sMarked as a best value within this paper	83.4%	83.4 %	—	Text Exact Reported	p005 / 15823 · Results and discussion · Fig. S2

RDE linear sweep voltammetry and Koutecky-Levich analysis

Voltammetry Tafel and polarisation analysis

CuNC (MOF) · Powder

0.1 M KOH O2-saturated; scan rate 5 mV s-1; RDE speeds 400-2000 rpm; 1600 rpm comparison curves; catalyst loading 0.1 mg cm-2.

Atmosphere: O2-saturated electrolyte
Geometry: Rotating disk electrode, glassy carbon D = 5 mm
Context: Target catalyst in ink.
Measurement source: p005 / 15823 · Results and discussion · Fig. 4b-d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Average electron transfer number n	3.28	3.28 electrons per O2	—	Text Exact Reported	p005 / 15823 · Results and discussion · Fig. 4c,d
K-L oxygen diffusion coefficient used	1.9 x 10-5 cm2 s-1	0.000019 cm2 s-1	—	Text Exact Reported	p004 · S3
K-L O2 bulk concentration used	1.2 x 10-6 mol cm-3	0.0000012 mol cm-3	—	Text Exact Reported	p004 · S3
K-L kinetic viscosity used	0.01 cm2 s-1	0.01 cm2 s-1	—	Text Exact Reported	p004 · S3
Limiting current density at 0.37 VMarked as a best value within this paper	4.7 mA cm-2 at 0.37 V vs RHE	4.7 mA cm-2	—	Text Exact Reported	p005 / 15823 · Results and discussion · Fig. 4b

Primary aluminium-air battery discharge and rate test

CuNC NP air cathode · Electrode

Same aluminium-air cell and electrolyte as target cathode.

Atmosphere: Air electrode
Geometry: Home-made aluminium-air cell
Context: Composite air cathode using nanoparticle comparator catalyst.
Measurement source: p006 / 15824 · Results and discussion · Fig. 6b,c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

CV capacitive measurements

Voltammetry

CuNC NPs · Powder

Same electrochemical systems; N2-saturated electrolyte; scan rates 20, 50, 100, 200 mV s-1.

Atmosphere: N2-saturated electrolyte
Geometry: Electrochemical catalyst electrode
Context: Nanoparticle comparison catalyst.
Measurement source: p005 / 15823 · Results and discussion · Fig. 5c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

ORR chronoamperometry

Chronoamperometry

CuNC NPs · Powder

Constant voltage 0.67 V vs RHE in 0.1 M KOH; continuous testing to 13000 s.

Geometry: Electrochemical catalyst electrode
Context: Nanoparticle comparison catalyst.
Measurement source: p006 · S5 · Figure S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current retention after 13000 s	62.9%	62.9 %	—	Text Exact Reported	p005 / 15823 · Results and discussion · Fig. S2

RDE linear sweep voltammetry

Voltammetry

CuNC NPs · Powder

0.1 M KOH O2-saturated; 1600 rpm comparison against CuNC (MOF) and 5 wt% Pt/C.

Atmosphere: O2-saturated electrolyte
Geometry: Rotating disk electrode
Context: Nanoparticle comparison catalyst.
Measurement source: p006 / 15824 · Results and discussion · Fig. 5f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ORR onset potential	0.71 V	0.71 V vs RHE	—	Text Exact Reported	p006 / 15824 · Results and discussion · Fig. 5f

ORR chronoamperometry

Chronoamperometry

20 wt% Pt/C · Powder

Constant voltage 0.67 V vs RHE in 0.1 M KOH; continuous testing to 13000 s.

Geometry: Electrochemical catalyst electrode
Context: Commercial 20 wt% Pt/C benchmark.
Measurement source: p005 / 15823 · Results and discussion · Fig. S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Current loss after 13000 s	24.1% loss	24.1 %	—	Text Exact Reported	p005 / 15823 · Results and discussion · Fig. S2
Current retention after 13000 s	75.9%	75.9 %	—	Figure Axis Rounded Reported	p006 · S5 · Figure S2

RDE linear sweep voltammetry and chronoamperometry benchmark

Voltammetry Chronoamperometry

20 wt% Pt/C · Powder

Commercial 20 wt% Pt/C compared in RDE at 1600 rpm and ORR durability at 0.67 V vs RHE.

Atmosphere: O2-saturated electrolyte for RDE; 0.1 M KOH for durability
Geometry: Rotating disk/glassy carbon electrode
Context: Commercial catalyst benchmark.
Measurement source: p005 / 15823 · Results and discussion · Fig. 4b; Fig. S2

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Pt/C limiting current density at 0.37 V	4.5 mA cm-2 at 0.37 V vs RHE	4.5 mA cm-2	—	Text Exact Reported	p005 / 15823 · Results and discussion · Fig. 4b

Primary aluminium-air battery discharge and rate test

5 wt% Pt/C air cathode · Electrode

Same aluminium-air cell and electrolyte as target cathode.

Atmosphere: Air electrode
Geometry: Home-made aluminium-air cell
Context: Commercial 5 wt% Pt/C air-cathode benchmark.
Measurement source: p006 / 15824 · Results and discussion · Fig. 6b,c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source