NiS2@V2O5/VS2 ternary heterojunction for a high-performance electrocatalyst in overall water splitting

Yang, Zhou; Xie, Xinjie; Zhang, Zhuqing; Yang, Jingjing; Yu, Chengbin; Dong, Shuang; Xiang, Meng; Qin, Hengfei

doi:10.1016/j.ijhydene.2022.06.076

Cited by 37 publications

(8 citation statements)

References 39 publications

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“…It is well known that Pt/C is an excellent HER electrocatalyst in an acidic medium, and few HER electrocatalysts can equal it. [ 36–39 ] In this work, the 0.05 Os–WO 2.72 has slightly inferior HER performance that the potential is 231 mV at 10 mA cm −2 , which is better than some electrocatalysts in Table S1 (S5), Supporting Information. The Mott–Schottky plot was analyzed in Figure 5d according to the following equation: [ 40 ]

$$1/\left(C^{2}\right) = \frac{2}{N_{\text{d}} e \epsilon \left(\epsilon\right)_{0}} \left(\right.

…”

Section: Resultsmentioning

confidence: 72%

Osmium‐Doped WO_2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

Xie,

Yang,

Zhang

et al. 2023

Energy Tech

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Herein, the organic matter is reported to reduce the overpotential of oxygen evolution reaction (OER) for water splitting. Herein, osmium (Os) is doped into WO2.72 to form Os–WO2.72 as an electrocatalyst, which is applied into water splitting to produce hydrogen and assist promote glucose oxidization reaction (GOR). The OER overpotential of 0.05 Os–WO2.72 is only 248 mV at 10 mA cm−2 in 1 m KOH, which is much superior to commercial RuO2. Additionally, the 0.05 Os–WO2.72 has ultralow GOR overpotential of 158 mV at 10 mA cm−2 and 365 mV at 100 mA cm−2 in 1 m KOH with 0.1 m glucose, and the cell voltage is 1.37 V at 10 mA cm−2, the values are much lower than its electrocatalytic behaviors in 1 m KOH. The anode produces gluconic acid, which is an important industrial intermediate during hydrogen production at the cathode.

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$$1/\left(C^{2}\right) = \frac{2}{N_{\text{d}} e \epsilon \left(\epsilon\right)_{0}} \left(\right.

…”

Section: Resultsmentioning

confidence: 72%

Osmium‐Doped WO_2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

Xie,

Yang,

Zhang

et al. 2023

Energy Tech

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“…35 We can compare the flat band potential (E fb ), which is defined as the electrode potential when the interface energy band bending of the semiconductor is zero. 36 From Fig. S5, † the E fb s of 0.7SnO 2 /0.3CoS 1.097 , 0.5SnO 2 /0.5CoS 1.097 , and 0.3SnO 2 /0.7CoS 1.097 were confirmed to be 0.96 V, 1.05 V, and 0.87 V, respectively.…”

Section: Resultsmentioning

confidence: 88%

SnO₂/CoS_1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation

Xie,

Zhang,

Xiang

et al. 2023

Green Chem.

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“…The M–S plot was given according to the equation [ 41 ]

\frac{1}{C^{2}} = \frac{2}{N_{normald} e {εε}_{0}} (V - V_{FB} - \frac{K T}{e})

where C is the capacitance (F cm −2 ); e is the elementary charge (1.6 × 10 −19 C); ε is the relative dielectric constant (F m −1 ); ε 0 is the vacuum permittivity; N d is the carrier density (cm −3 ); V is the applied potential ( V ); V FB is flat band potential; K is Boltzmann's constant (1.38 × 10 −23 F m −1 ); and T is the absolute temperature ( K ). Considering that the reciprocal of the slope is highly related to the number of vacancy sites at the interphase between La and La 2 O 2 S, the slope in the M–S plot can be used to analyze the active sites of La/La 2 O 2 S 1− x .…”

Section: Resultsmentioning

confidence: 99%

Rare‐Earth Lanthanum Tailoring Mott–Schottky Heterojunction by Sulfur Vacancy Modification as a Bifunctional Electrocatalyst for Zinc–Air Battery

Yang

et al. 2022

Small Structures

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Zinc–air battery (ZAB) has considerable potential to be applied in the energy storage field. The main commercial electrocatalysts are Pt/C and RuO2, which are expensive and cannot possess good bifunctional electrocatalytic activities including oxygen reduction reaction and oxygen evolution reaction. Herein, the rare‐earth metal lanthanum is first constructed to be a Mott–Schottky heterojunction, and the S vacancy is introduced into the Mott–Schottky heterojunction. The so‐obtained La/La2O2S1−x shows excellent bifunctional electrocatalytic activity with ΔE of 0.68 V, which is superior to La/La2O2S without S vacancies and the commercial Pt/C + RuO2 system. In addition, the La/La2O2S1−x is assembled into ZABs, showing a high open power density of 212 mW cm−2, and a large specific capacity of 707 mAh g−1, as good cycle stability. The density functional theory calculations reveal the tailoring effect of S vacancy on the Schottky barrier to control the electron transfer concentration and ameliorate over‐strong adsorption, which blocks the reflux of electrons and promotes the unidirectional flow of electrons. In addition, the S vacancy modulates the electron cloud of La‐4f orbit and makes the electrocatalytic pathway closer to the ideal pathway.

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NiS2@V2O5/VS2 ternary heterojunction for a high-performance electrocatalyst in overall water splitting

Cited by 37 publications

References 39 publications

Osmium‐Doped WO_2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

Osmium‐Doped WO_2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

SnO₂/CoS_1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation

Rare‐Earth Lanthanum Tailoring Mott–Schottky Heterojunction by Sulfur Vacancy Modification as a Bifunctional Electrocatalyst for Zinc–Air Battery

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NiS2@V2O5/VS2 ternary heterojunction for a high-performance electrocatalyst in overall water splitting

Cited by 37 publications

References 39 publications

Osmium‐Doped WO2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

Osmium‐Doped WO2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

SnO2/CoS1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation

Rare‐Earth Lanthanum Tailoring Mott–Schottky Heterojunction by Sulfur Vacancy Modification as a Bifunctional Electrocatalyst for Zinc–Air Battery

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Osmium‐Doped WO_2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

Osmium‐Doped WO_2.72 as a Promising Electrocatalyst for Hydrogen Evolution Linking to Glucose Oxidation

SnO₂/CoS_1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation