A ternary calabash model photocatalyst (Pd/MoP)/CdS for enhancing H2 evolution under visible light irradiation

Shen, Yuke; Li, Dekang; Dang, Yuying; Zhang, Jiawei; Wang, Wei; Ma, Baojun

doi:10.1016/j.apsusc.2021.150432

Cited by 28 publications

(14 citation statements)

References 47 publications

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“…The Cd 3d spectrum in Figure 6b displayed two peaks at 405.0 and 411.8 eV, attributing to Cd 3d 5/2 and Cd 3d 3/2 , respectively. 36 The S 2p spectrum is shown in Figure 6c, which could be resolved into two obvious peaks at 161.6 and 162.8 eV. The two peaks could be assigned to S 2p 3/2 and S 2p 1/2 , respectively.…”

Section: Resultsmentioning

confidence: 94%

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Improving the Photocatalytic H₂ Evolution of CdS by Adjusting the (002) Crystal Facet

et al. 2022

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In general, the activities for H 2 evolution are dependent on the morphologies and exposed facet of semiconductorbased photocatalysts. Here, we reported that CdS with the (002) crystal facet and a small capacitance was vital for enhancing photocatalytic H 2 evolution. After loading CoP as a co-catalyst, the H 2 evolution activity of CoP/CdS-P (particle-like, dominant (002) facet) increased remarkably to 24 600 μmol/(h g), which was 1.28 times that of CoP/CdS-L (leaflike), 2.09 times that of CoP/CdS-R (rodlike), and 5.67 times that of CoP/CdS-S (spherelike). Electrochemical tests and surface photovoltage spectra demonstrated that CdS-P with a large proportion of the (002) facet and the smallest capacitance of 4.31 F/cm 2 leads to the highest separation and transportation of photoexcited electrons. This study reveals the superiority of CdS with the (002) facet and gives an idea to design efficient semiconductor-based photocatalysts with a small capacitance.

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Section: Resultsmentioning

confidence: 94%

“…, where C (F) is the total capacitance, J a (A/cm 2 ) is the anode current density, J c (A/cm 2 ) is the cathode current density, ν (V/s) is scanning rate, and ΔE (V) is the electrochemical window. 36…”

Section: Methodsmentioning

confidence: 99%

Improving the Photocatalytic H₂ Evolution of CdS by Adjusting the (002) Crystal Facet

et al. 2022

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“…Also, in order to further enhance the properties of a non-noble metal cocatalyst, we developed an effective composite cocatalyst strategy, which integrated a noble metal of ultralow content with a non-noble metal. For example, Pt/Mo 2 N, 34 Ru/WC, 35 and Pd/Mo 2 P 36 show greatly enhanced photocatalytic activity on CdS compared with that of the relevant sole cocatalyst. Here, the noble metal can effectively transfer stored electrons in a nonnoble metal cocatalyst.…”

Section: ■ Introductionmentioning

confidence: 99%

Capacitance Catalysis: Positive and Negative Effects of Capacitance of Mo₂C in Photocatalytic H₂ Evolution

Luo

Dang

et al. 2022

ACS Sustainable Chem. Eng.

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A non-noble metal cocatalyst with capacitance is cost-effective and has excellent photocatalytic H2 evolution performance for water splitting. But the intrinsic action of capacitance is unclear. Here, by controlling the capacitance of Mo2C, we reported a volcanic curve relationship between the photocatalytic activity of Mo2C/CdS and the capacitance of Mo2C. At the middle capacitance of 18.95 F/g of Mo2C-a4, Mo2C-a4/CdS exhibits the best H2 evolution activity of 5560 μmol/g/h. When Pt is introduced on the surface of Mo2C, the photocatalytic activity of (Pt/Mo2C-a4)/CdS is further enhanced to 8090 μmol/g/h. Comparing the activities between (Pt/Mo2C)/CdS and Mo2C/CdS with the capacitance of Mo2C, the activity ratio and difference values increase and finally reach a plateau with the increasing capacitance. Electrochemical and photoelectrochemical studies demonstrate that the capacitance of Mo2C has dual opposite effects (positive and negative) in photocatalytic reactions. The capacitance can capture electrons and store them, thereby enhancing the separation efficiency of photoexcited carriers of CdS. However, overlarge capacitance constrains the stored electrons and prevents them from releasing, thus decreasing the cocatalytic efficiency, which can be resolved in some degree by introducing some Pt on Mo2C. This work elucidates the dual effects of capacitance and puts forward the concept of capacitance catalysis.

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“…It is always a challenge to find efficient and stable catalysts for the photocatalytic decomposition of water to produce hydrogen gas. 12,13 At present, the main photocatalysts are TiO 2 , 14,15 CdS, 16–18 g-C 3 N 4 , 19,20 ZnIn 2 S 4 , 21 Mn x Cd 1− x S, 22 Cd x Zn 1− x S, 23,24 etc. Mn x Cd 1− x S is a ternary sulfide composed of CdS and MnS.…”

Section: Introductionmentioning

confidence: 99%

Modification of the surface of Mn_0.25Cd_0.75S polyhedra with NiB: reducing the surface work function and promoting electron migration for enhanced photocatalytic hydrogen production

Qin

Wang

et al. 2022

New J. Chem.

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A ternary calabash model photocatalyst (Pd/MoP)/CdS for enhancing H2 evolution under visible light irradiation

Cited by 28 publications

References 47 publications

Improving the Photocatalytic H₂ Evolution of CdS by Adjusting the (002) Crystal Facet

Improving the Photocatalytic H₂ Evolution of CdS by Adjusting the (002) Crystal Facet

Capacitance Catalysis: Positive and Negative Effects of Capacitance of Mo₂C in Photocatalytic H₂ Evolution

Modification of the surface of Mn_0.25Cd_0.75S polyhedra with NiB: reducing the surface work function and promoting electron migration for enhanced photocatalytic hydrogen production

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A ternary calabash model photocatalyst (Pd/MoP)/CdS for enhancing H2 evolution under visible light irradiation

Cited by 28 publications

References 47 publications

Improving the Photocatalytic H2 Evolution of CdS by Adjusting the (002) Crystal Facet

Improving the Photocatalytic H2 Evolution of CdS by Adjusting the (002) Crystal Facet

Capacitance Catalysis: Positive and Negative Effects of Capacitance of Mo2C in Photocatalytic H2 Evolution

Modification of the surface of Mn0.25Cd0.75S polyhedra with NiB: reducing the surface work function and promoting electron migration for enhanced photocatalytic hydrogen production

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Product

Resources

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Improving the Photocatalytic H₂ Evolution of CdS by Adjusting the (002) Crystal Facet

Improving the Photocatalytic H₂ Evolution of CdS by Adjusting the (002) Crystal Facet

Capacitance Catalysis: Positive and Negative Effects of Capacitance of Mo₂C in Photocatalytic H₂ Evolution

Modification of the surface of Mn_0.25Cd_0.75S polyhedra with NiB: reducing the surface work function and promoting electron migration for enhanced photocatalytic hydrogen production