Spectacular photocatalytic hydrogen evolution using metal-phosphide/CdS hybrid catalysts under sunlight irradiation

Cao, Shuang; Chen, Yong; Wang, Chuan‐Jun; Lv, Xiao‐Jun; Fu, Wen‐Fu

doi:10.1039/c5cc01799h

Cited by 219 publications

(132 citation statements)

References 38 publications

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“…As revealed in Fig. 57 Apart from having the charge transfer characteristics, Co 0.85 Se also possesses similar properties of zero-valent metals. 59,60 The peak at 781.2 eV is assigned to the oxidized cobalt due to air contact.…”

Section: Resultsmentioning

confidence: 89%

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Enhanced photocatalytic H₂-evolution by immobilizing CdS nanocrystals on ultrathin Co_0.85Se/RGO–PEI nanosheets

et al. 2015

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We herein report a novel noble-metal-free photocatalytic H 2 -production system by immobilizing CdS nanocrystals on ultrathin Co 0.85 Se/graphene nanosheets. The well-designed composite material was prepared by a simple solvothermal method and achieved a dramatically enhanced H 2 -evolution performance when compared with other bulk counterparts. Under optimal conditions, the H 2 -evolution efficiency can reach up to 17.60 mmol mg À1 h À1 after 10 h of LED visible light irradiation, which is comparable to that of noble Pt nanoparticles (18.60 mmol mg À1 h À1 ). It is proposed that the unusual catalytic rate arises from the special nanostructure of Co 0.85 Se and a positive synergetic effect between Co 0.85 Se and graphene. The results show that the ultrathin Co 0.85 Se which possesses a half-metallic character is a promising noble-metal-free cocatalyst for practical photocatalytic hydrogen production application.

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Section: Resultsmentioning

confidence: 89%

“…XPS experiments were carried out to examine the characteristics of Co 0.85 Se. Ni 2 P, 35 CoP, 57 and Co 2 P 62 ) reported. 5a, the peak located at 778.5 eV can be assigned to the Co 2p 3/2 species in Co 0.85 Se, which is slightly positively shied to metallic Co (777.9-778.2 eV).…”

Section: Resultsmentioning

confidence: 96%

Enhanced photocatalytic H₂-evolution by immobilizing CdS nanocrystals on ultrathin Co_0.85Se/RGO–PEI nanosheets

et al. 2015

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“…Although the most common noble metal cocatalysts (e.g., Pt, Pd, or Au) can act as electron transfer mediator and further prolong the lifetime of charge carriers to achieve high activity in H 2 evolution, they are too scarce and expensive . Recent studies indicate that some non‐noble metals, metal oxides, metal sulfides, and metal phosphides can be good candidates for cocatalysts . Therefore, constructing a suitable hybrid structure‐based TiO 2 by using abundant elements in the earth is consistently considered to be a common strategy to effectively retard the recombination of electron–hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Phosphide Modified Titanium Oxide Nanophotocatalysts with Significantly Enhanced Photocatalytic Hydrogen Evolution from Water Splitting

Yue

Wang

et al. 2017

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Production of hydrogen from photocatalytic water splitting holds promise as an alternative energy source with superiority of cleanliness, environment friendliness, low price, and sustainability. Perfectly constructing the noble-metal-free and stable hybrid structure photocatalyst is quite essential; herein, for the first time the authors aim to use cobalt phosphide as the cocatalyst on titanium oxide to form a novel hybrid structure to enhance the utilization of the photoexcited electrons in redox reactions for improved photocatalytic H evolution activity. Thus, the achieved significantly increased photocatalytic H -evolution rate on the optimized CoP/TiO (8350 µmol h g ) is 11 times higher than that of the pristine TiO . Moreover, this work is expected to spur more insight into synthesizing such novel photofunctional systems, achieving high photocatalytic H evolution activity and sufficient stability for solar-to-chemical conversion and utilization.

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“…Photocatalytic H 2 evolution from water splitting, which directly converts solar energy into clean chemical energy without pollution, has attracted much attention [6][7][8][9][10][11]. Since the pioneering work discovered by Fujishima and Honda [12], there has been considerable development in the design and construction of highly-efficient semiconductor photocatalysts, such as TiO 2 [13][14][15][16], ZnO [19][20][21], CdS [22][23][24][25][26][27], etc.…”

Section: Introductionmentioning

confidence: 99%

Rational design of CdS@ZnO core-shell structure via atomic layer deposition for drastically enhanced photocatalytic H2 evolution with excellent photostability

et al. 2017

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Rational design of CdS@ZnO core-shell structure via atomic layer deposition for drastically enhanced photocatalytic H evolution with excellent photostability, Nano Energy, http://dx.doi.org/10. 1016/j.nanoen.2017.06.047 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. number of deposition cycles, and the obtained CdS@ZnO with 100 ALD deposition cycles displays the optimal photocatalytic H 2 evolution rate of 11.36 mmol/g/h. WhenPt and PdS are used as the co-catalysts, the H 2 evolution rates are further enhanced to 71.39 and 98.82 mmol/g/h, respectively, which are 4.1 and 5.7 times higher than the highest reported value (17.40 mmol/g/h) among CdS-ZnO catalyst systems. Detailed characterization reveals that the drastically enhanced photocatalytic activity can be attributed to not only efficient space separation of the photo-induced electrons and holes resulted from the formation of a direct Z-scheme photocatalytic system between crystalline ZnO and CdS, but also the intimate contact at molecular scale between the two semiconductors. Due to the coverage of ALD-prepared crystalline ZnO shell on CdS core, the CdS@ZnO core-shell structures exhibit excellent photostability. Graphical abstract3 / 31

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Spectacular photocatalytic hydrogen evolution using metal-phosphide/CdS hybrid catalysts under sunlight irradiation

Cited by 219 publications

References 38 publications

Enhanced photocatalytic H₂-evolution by immobilizing CdS nanocrystals on ultrathin Co_0.85Se/RGO–PEI nanosheets

Enhanced photocatalytic H₂-evolution by immobilizing CdS nanocrystals on ultrathin Co_0.85Se/RGO–PEI nanosheets

Cobalt Phosphide Modified Titanium Oxide Nanophotocatalysts with Significantly Enhanced Photocatalytic Hydrogen Evolution from Water Splitting

Rational design of CdS@ZnO core-shell structure via atomic layer deposition for drastically enhanced photocatalytic H2 evolution with excellent photostability

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Spectacular photocatalytic hydrogen evolution using metal-phosphide/CdS hybrid catalysts under sunlight irradiation

Cited by 219 publications

References 38 publications

Enhanced photocatalytic H2-evolution by immobilizing CdS nanocrystals on ultrathin Co0.85Se/RGO–PEI nanosheets

Enhanced photocatalytic H2-evolution by immobilizing CdS nanocrystals on ultrathin Co0.85Se/RGO–PEI nanosheets

Cobalt Phosphide Modified Titanium Oxide Nanophotocatalysts with Significantly Enhanced Photocatalytic Hydrogen Evolution from Water Splitting

Rational design of CdS@ZnO core-shell structure via atomic layer deposition for drastically enhanced photocatalytic H2 evolution with excellent photostability

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Enhanced photocatalytic H₂-evolution by immobilizing CdS nanocrystals on ultrathin Co_0.85Se/RGO–PEI nanosheets

Enhanced photocatalytic H₂-evolution by immobilizing CdS nanocrystals on ultrathin Co_0.85Se/RGO–PEI nanosheets