Electrochemistry Application — Unleashing the room temperature boronization: Blooming of Ni-ZIF nanobuds for efficient photo/electro catalysis of water

11 measurement groups · 99 results

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

Voltage disparity from OER and HER LSV curves

Voltammetry

24-BNZ composite electrode on nickel foam · Electrode

SI Fig. S12 reports Delta V20 at 20 mA cm-2 for NF, NZ, 4-BNZ, 9-BNZ, 24-BNZ and 48-BNZ.

Geometry: three-electrode OER/HER comparison
Context: series comparison of composite electrodes and bare NF
Measurement source: 13 · Supporting data · Fig. S12

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ Delta V20 from OER/HER LSVMarked as a best value within this paper	DeltaV20=1.804 V	—	—	Figure Axis Exact Reported	13 · Supporting data · Fig. S12
48-BNZ Delta V20 from OER/HER LSV	DeltaV20=1.854 V	—	—	Figure Axis Exact Reported	13 · Supporting data · Fig. S12
4-BNZ Delta V20 from OER/HER LSV	DeltaV20=2.004 V	—	—	Figure Axis Exact Reported	13 · Supporting data · Fig. S12
9-BNZ Delta V20 from OER/HER LSV	DeltaV20=1.938 V	—	—	Figure Axis Exact Reported	13 · Supporting data · Fig. S12
NF Delta V20 from OER/HER LSV	DeltaV20=2.206 V	—	—	Figure Axis Exact Reported	13 · Supporting data · Fig. S12
NZ Delta V20 from OER/HER LSV	DeltaV20=2.095 V	—	—	Figure Axis Exact Reported	13 · Supporting data · Fig. S12

Cyclic voltammetry double-layer capacitance and ECSA calculation

Voltammetry

24-BNZ composite electrode on nickel foam · Electrode

Non-faradaic CV scans at 10, 20, 30, 40 and 50 mV/s; Cdl from positive/negative current fit, ECSA from Cdl/Cs.

Geometry: 24-BNZ composite electrode on nickel foam
Context: composite electrode
Measurement source: 11 · Supporting data · Fig. S10

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ double-layer capacitance Cdl	13.7 mF cm-2	—	—	Figure Axis Exact Reported	11 · Supporting data · Fig. S10
24-BNZ electrochemically active surface area	342 cm2	—	—	Figure Axis Exact Reported	11 · Supporting data · Fig. S10

Electrochemical impedance spectroscopy Nyquist fitting

Impedance spectroscopy

24-BNZ composite electrode on nickel foam · Electrode

SI Fig. S9 gives R1, R2 and R3 fit values for OER and HER equivalent circuits for NZ, 4-BNZ, 9-BNZ, 24-BNZ and 48-BNZ.

Geometry: three-electrode EIS on nickel-foam based electrodes
Context: series comparison of composite electrodes
Measurement source: 10 · Supporting data · Fig. S9

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ HER EIS fit R1	2.798 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
24-BNZ HER EIS fit R2	3.931 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
24-BNZ HER EIS fit R3	0 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
48-BNZ HER EIS fit R1	1.79 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
48-BNZ HER EIS fit R2	5.89 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
48-BNZ HER EIS fit R3	0.004 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
4-BNZ HER EIS fit R1	2.684 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
4-BNZ HER EIS fit R2	7.558 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
4-BNZ HER EIS fit R3	6.071 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
9-BNZ HER EIS fit R1	2.461 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
9-BNZ HER EIS fit R2	5.608 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
9-BNZ HER EIS fit R3	3.416 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
NZ HER EIS fit R1	2.06 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
NZ HER EIS fit R2	11.11 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
NZ HER EIS fit R3	2.71 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
24-BNZ OER EIS fit R1	2.115 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
24-BNZ OER EIS fit R2	2.737 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
24-BNZ OER EIS fit R3	0.326 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
48-BNZ OER EIS fit R1	2.37 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
48-BNZ OER EIS fit R2	18.21 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
48-BNZ OER EIS fit R3	0.285 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
4-BNZ OER EIS fit R1	1.755 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
4-BNZ OER EIS fit R2	53.5 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
4-BNZ OER EIS fit R3	0.68 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
9-BNZ OER EIS fit R1	1.999 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
9-BNZ OER EIS fit R2	45.96 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
9-BNZ OER EIS fit R3	1.181 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
NZ OER EIS fit R1	2.599 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
NZ OER EIS fit R2	108.3 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9
NZ OER EIS fit R3	0 ohm	—	—	SI Table Exact Reported	10 · Supporting data · Fig. S9

Magnified LSV extrapolation onset-potential table

Voltammetry

24-BNZ composite electrode on nickel foam · Electrode

SI Fig. S8 tabulates OER and HER onset potentials for NF, NZ, 4-BNZ, 9-BNZ, 24-BNZ and 48-BNZ in alkaline electrolyte.

Geometry: three-electrode LSV on nickel-foam based electrodes
Context: series comparison; BNZ/NZ active-material/carbon/PVDF electrodes on NF plus bare NF control
Measurement source: 9 · Supporting data · Fig. S8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ HER onset potential from SI extrapolation tableMarked as a best value within this paper	-0.083 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
48-BNZ HER onset potential from SI extrapolation table	-0.100 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
4-BNZ HER onset potential from SI extrapolation table	-0.172 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
9-BNZ HER onset potential from SI extrapolation table	-0.091 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
NF HER onset potential from SI extrapolation table	-0.206 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
NZ HER onset potential from SI extrapolation table	-0.199 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
24-BNZ OER onset potential from SI extrapolation tableMarked as a best value within this paper	1.59 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
48-BNZ OER onset potential from SI extrapolation table	1.63 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
4-BNZ OER onset potential from SI extrapolation table	1.67 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
9-BNZ OER onset potential from SI extrapolation table	1.65 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
NF OER onset potential from SI extrapolation table	1.88 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8
NZ OER onset potential from SI extrapolation table	1.71 V vs RHE	—	—	SI Table Exact Reported	9 · Supporting data · Fig. S8

HER EIS, TOF calculation and chronoamperometry

Impedance spectroscopy Chronoamperometry

24-BNZ composite electrode on nickel foam · Electrode

1 M KOH; Nyquist EIS from SI Fig. S9b; TOF at 174 mV; 16 h CA.

Measurement source: 8 · 3.2 Electrocatalytic activity · Figs. S9b, 6h

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ HER charge-transfer resistanceMarked as a best value within this paper	Rct = 3.931 ohm	—	—	Text Exact Reported	8 · 3.2 · Fig. S9b
24-BNZ HER chronoamperometry duration	16 h with no deflections	—	—	Text Rounded Reported	8 · 3.2 · Fig. 6h
24-BNZ HER TOF at 174 mV	0.076 s-1	—	—	Text Exact Reported	8 · 3.2

HER LSV and Tafel analysis

Voltammetry Tafel and polarisation analysis

24-BNZ composite electrode on nickel foam · Electrode

1 M KOH, three-electrode cell, same electrode fabrication and RHE calibration; overpotential at 20 mA cm-2.

Measurement source: 8 · 3.2 Electrocatalytic activity · Fig. 6d-f

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ exchange current density by Tafel extrapolationMarked as a best value within this paper	~4.74 mA cm-2	—	—	Visual Estimate Approximate	12 · Supporting data · Fig. S11
48-BNZ exchange current density by Tafel extrapolation	~4.44 mA cm-2	—	—	Visual Estimate Approximate	12 · Supporting data · Fig. S11
4-BNZ exchange current density by Tafel extrapolation	~3.97 mA cm-2	—	—	Visual Estimate Approximate	12 · Supporting data · Fig. S11
9-BNZ exchange current density by Tafel extrapolation	~2.86 mA cm-2	—	—	Visual Estimate Approximate	12 · Supporting data · Fig. S11
NF exchange current density by Tafel extrapolation	~1.945 mA cm-2	—	—	Visual Estimate Approximate	12 · Supporting data · Fig. S11
24-BNZ HER onset potential	-0.083 V vs RHE	—	—	Text Exact Reported	8 · 3.2 · Fig. S8b
24-BNZ HER overpotential at 20 mA cm-2Marked as a best value within this paper	174 mV @ 20 mA cm-2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6d,f
48-BNZ HER overpotential at 20 mA cm-2	202 mV @ 20 mA cm-2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6d,f
4-BNZ HER overpotential at 20 mA cm-2	232 mV @ 20 mA cm-2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6d,f
9-BNZ HER overpotential at 20 mA cm-2	193 mV @ 20 mA cm-2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6d,f
NZ HER overpotential at 20 mA cm-2	245 mV @ 20 mA cm-2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6d,f
24-BNZ HER Tafel slope	159 mV dec-1	—	—	Text Exact Reported	8 · 3.2 · Fig. 6e
48-BNZ HER Tafel slope	approximately 145 mV dec-1 from Fig. 6e label	—	—	Figure Axis Approximate	7 · Fig. 6 caption/labels · Fig. 6e
4-BNZ HER Tafel slope	approximately 192 mV dec-1 from Fig. 6e label	—	—	Figure Axis Approximate	7 · Fig. 6 caption/labels · Fig. 6e
9-BNZ HER Tafel slope	approximately 161 mV dec-1 from Fig. 6e label	—	—	Figure Axis Approximate	7 · Fig. 6 caption/labels · Fig. 6e
NF HER Tafel slope	approximately 193 mV dec-1 from Fig. 6e label	—	—	Figure Axis Approximate	7 · Fig. 6 caption/labels · Fig. 6e
NZ HER Tafel slope	approximately 160 mV dec-1 from Fig. 6e label	—	—	Figure Axis Approximate	7 · Fig. 6 caption/labels · Fig. 6e

OER EIS, TOF calculation and chronoamperometry

Impedance spectroscopy Chronoamperometry

24-BNZ composite electrode on nickel foam · Electrode

1 M KOH; Nyquist EIS from SI Fig. S9a; TOF at 396 mV; 16 h CA at 10 mA cm-2.

Measurement source: 8 · 3.2 Electrocatalytic activity · Figs. S9a, 6g

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ OER charge-transfer resistanceMarked as a best value within this paper	Rct = 2.73 ohm	—	—	Text Exact Reported	8 · 3.2 · Fig. S9a
24-BNZ OER chronoamperometry duration	16 h at 10 mA cm-2 with no deflections	—	—	Text Rounded Reported	8 · 3.2 · Fig. 6g
24-BNZ OER TOF at 396 mV	0.038 s-1	—	—	Text Exact Reported	8 · 3.2

OER LSV and Tafel analysis

Voltammetry Tafel and polarisation analysis

24-BNZ composite electrode on nickel foam · Electrode

1 M KOH, three-electrode cell, Ag/AgCl reference, Pt wire counter, 5 mV/s LSV, RHE calibrated, IR compensated; overpotential at 20 mA cm-2.

Measurement source: 7-8 · 3.2 Electrocatalytic activity · Fig. 6a-c

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ OER onset potential	1.59 V vs RHE	—	—	Text Exact Reported	8 · 3.2 · Fig. S8a
24-BNZ OER overpotential at 20 mA cm-2Marked as a best value within this paper	396 mV @ 20 mA/cm2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6a,c
48-BNZ OER overpotential at 20 mA cm-2	423 mV @ 20 mA/cm2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6a,c
4-BNZ OER overpotential at 20 mA cm-2	536 mV @ 20 mA/cm2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6a,c
9-BNZ OER overpotential at 20 mA cm-2	507 mV @ 20 mA/cm2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6a,c
NZ OER overpotential at 20 mA cm-2	614 mV @ 20 mA/cm2	—	—	Text Exact Reported	8 · 3.2 · Fig. 6a,c
24-BNZ OER Tafel slopeMarked as a best value within this paper	115 mV dec-1	—	—	Text Exact Reported	8 · 3.2 · Fig. 6b
48-BNZ OER Tafel slope	167 mV dec-1	—	—	Text Exact Reported	8 · 3.2 · Fig. 6b
4-BNZ OER Tafel slope	278 mV dec-1	—	—	Text Exact Reported	8 · 3.2 · Fig. 6b
9-BNZ OER Tafel slope	211 mV dec-1	—	—	Text Exact Reported	8 · 3.2 · Fig. 6b
NZ OER Tafel slope	298 mV dec-1	—	—	Text Exact Reported	8 · 3.2 · Fig. 6b

Two-electrode overall water-splitting LSV and chronoamperometry

Voltammetry Chronoamperometry

24-BNZ composite electrode on nickel foam · Electrode

Two pieces of 24-BNZ coated NF as cathode and anode in 1 M KOH; 10 mA cm-2 benchmark and 16 h CA.

Measurement source: 9 · 3.2 Electrocatalytic activity · Fig. 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ overall water-splitting cell voltage at 10 mA cm-2Marked as a best value within this paper	1.63 V at 10 mA cm-2	—	—	Text Exact Reported	9 · 3.2 · Fig. 7a
24-BNZ overall water-splitting chronoamperometry	16 h at 10 mA cm-2	—	—	Text Exact Reported	9 · 3.2 · Fig. 7b

Photocatalytic water splitting gas evolution by GC-TCD

24-BNZ powder / 24 h boronized Ni-ZIF · Powder

100 mL aqueous solution, 10 mg photocatalyst, Ar purge, 300 W xenon lamp, 4.10 x 10^-3 W/cm2, 25 deg C, 500 rpm; Na2S/Na2SO3 for HER and AgNO3 for OER.

Measurement source: 3,9-10 · 2.6; 3.3 Photocatalytic activity · Fig. 8

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Photocatalyst dose	10 mg	—	—	Text Exact Reported	3 · 2.6
24-BNZ photocatalytic H2 evolution rateMarked as a best value within this paper	14.374 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8b
48-BNZ photocatalytic H2 evolution rate	9.129 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8b
4-BNZ photocatalytic H2 evolution rate	3.971 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8b
9-BNZ photocatalytic H2 evolution rate	8.117 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8b
NZ photocatalytic H2 evolution rate	1.648 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8b
24-BNZ photocatalytic O2 evolution rateMarked as a best value within this paper	7.409 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8d
48-BNZ photocatalytic O2 evolution rate	4.657 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8d
4-BNZ photocatalytic O2 evolution rate	2.079 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8d
9-BNZ photocatalytic O2 evolution rate	3.399 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8d
NZ photocatalytic O2 evolution rate	0.877 umol g-1 min-1	—	—	Text Exact Reported	9 · 3.3 · Fig. 8d
24-BNZ photocatalytic H2 stability duration	500 min intermittent light-off stability test	—	—	Text Exact Reported	9-10 · 3.3 · Fig. 8e

Urea electrolysis LSV

Voltammetry

24-BNZ composite electrode on nickel foam · Electrode

24-BNZ on NF as both cathode and anode in 1 M KOH + 0.33 M urea; scan rate 1 mV/s in SI Fig. S13.

Measurement source: 14 · Supporting data · Fig. S13

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
24-BNZ urea electrolysis cell voltage at 10 mA cm-2Marked as a best value within this paper	1.58 V at 10 mA cm-2	—	—	Figure Axis Exact Reported	14 · Supporting data · Fig. S13