Photocatalytic pure water splitting with high efficiency and value by Pt/porous brookite TiO2 nanoflutes

Cao, Shuang; Chan, Ting‐Shan; Lu, Ying‐Rui; Shi, Xinghua; Fu, Bing; Wu, Zhijiao; Li, Hongmei; Liu, Kang; Alzuabi, Sarah; Cheng, Ping; Liu, Min; Li, Tao; Chen, Xiaobo; Piao, Lingyu

doi:10.1016/j.nanoen.2019.104287

Cited by 151 publications

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“…The coordination number and distance between the central atom and neighboring atoms can be extracted via the extended X‐ray absorption fine structure (EXAFS). [ 47–49 ] The absence of metal–metal bonds in the EXAFS spectra tells us that no clusters or nanoparticles are formed. [ 50–55 ] In addition, advanced computational methods such as density functional theory (DFT) calculations can be adopted to confirm the most stable configuration of SAs, which can help the interpretation of XAS data.…”

Section: Introductionmentioning

confidence: 99%

Design Principles of Single Atoms on Carbons for Lithium–Sulfur Batteries

et al. 2020

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is a senior scientist at the X-ray Science Division in Argonne National Laboratory. He has developed in situ X-ray techniques to understand the fundamental chemistry of complex disordered solid and solution systems, such as energy storage materials, catalysts, soot, heavy petroleum, oil shale, and carbons. Chemistry is combined with characterization techniques, including mass spectrometry, IR, NMR, and X-ray scattering and spectroscopy. IR and MS are used simultaneously with X-ray techniques. In 2009, he was elected to the inaugural class of the ACS Fellows and was the chair of the 2018 International Conference on Small Angle Scattering.

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Section: Introductionmentioning

confidence: 99%

Design Principles of Single Atoms on Carbons for Lithium–Sulfur Batteries

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“…[3][4][5][6]. Hydrogen can be evolved through either photocatalytic water splitting or reforming [7,8]. Through these processes, solar energy can be converted to chemical energy, and stored in hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reforming for Hydrogen Evolution: A Review

Yao

Gao

et al. 2020

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Hydrogen is considered to be an ideal energy carrier to achieve low-carbon economy and sustainable energy supply. Production of hydrogen by catalytic reforming of organic compounds is one of the most important commercial processes. With the rapid development of photocatalysis in recent years, the applications of photocatalysis have been extended to the area of reforming hydrogen evolution. This research area has attracted extensive attention and exhibited potential for wide application in practice. Photocatalytic reforming for hydrogen evolution is a sustainable process to convert the solar energy stored in hydrogen into chemical energy. This review comprehensively summarized the reported works in relevant areas, categorized by the reforming precursor (organic compound) such as methanol, ethanol and biomass. Mechanisms and characteristics for each category were deeply discussed. In addition, recommendations for future work were suggested.

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“…S6, the electron spin resonance (ESR) results prove the formation of •OH radicals with 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as the •OH radical trap. The signal of DMPO-OH radical adduct (1:2:2:1, aN=aH=15.4G) was observed after 60 s UV light irradiation for the catalyst in pure water, illustrating the facilitated formation of •OH radicals [60]. The X-ray photoelectron spectroscopy (XPS) spectra further confirm the existence of abundant adsorbed -OH on the TiO 2 surface leading to the formation of •OH radicals (Fig.…”

Section: The Photoelectric and Photocatalysis Performances Of The Nanmentioning

confidence: 68%

“…The peaks at 531.7 and 533.1 eV of O 1s indicated the amounts of -OH and physisorbed water on the surface of the sample, respectively. Both peaks increased for the sample with UV light irradiation, indicating that the Pt/ TiO 2 had a modified hydrophilic surface and improved -OH amount after irradiation [60,63]. Based on the above analyses, H 2 O 2 was formed by the two-electron transfer process (2H 2 O → H 2 + H 2 O 2 ).…”

Section: The Photoelectric and Photocatalysis Performances Of The Nanmentioning

confidence: 90%

“…Pure water splits into H 2 and H 2 O 2 in this system, and no oxygen is detected. The formation of H 2 O 2 is due to the two-electron reaction of water oxidation, which has a kinetic advantage than the four-electron reaction [60][61][62]. Two •OH radicals formed by water photo-oxidation dimerize into H 2 O 2 .…”

Section: The Photoelectric and Photocatalysis Performances Of The Nanmentioning

confidence: 99%

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Mesoporous TiO2 mixed crystals for photocatalytic pure water splitting

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Semiconductor mesoporous single crystals have attracted considerable attention due to the merits of excellent light absorption ability and large surface area for photocatalysis capability. However, most of the materials have a relative large size (~um), which can hardly suppress the recombination of photogenerated electrons and holes. In this work, we synthesized a series of nano mesoporous TiO 2 mixed crystals (brookite and rutile) with high carrier transfer efficiency, improved mass transfer and diffusion abilities, which are crucial for the outstanding photocatalytic performance. Meanwhile, the key factors in the growth process and mechanism of the mesoporous TiO 2 mixed crystals were addressed. With the assistance of Pt nanoparticles, H 2 and H 2 O 2 production can be simultaneously achieved and the efficiencies can reach up to 9.46 ± 0.56 and 3.29 ± 1.28 μmol mg −1 h −1 , respectively. The H 2 evolution rate is 2.8-fold higher than that of the reported TiO 2 nanoparticle catalyst (3.34 μmol mg −1 h −1). The excellent photocatalytic efficiency can be attributed to the special mixed crystal structure of the mesoporous TiO 2 crystals. This work provides new ideas and guidance for precise synthesis of nano mesoporous TiO 2 mixed crystals and enhancing their water splitting performance with high value-added products.

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Photocatalytic pure water splitting with high efficiency and value by Pt/porous brookite TiO2 nanoflutes

Cited by 151 publications

References 35 publications

Design Principles of Single Atoms on Carbons for Lithium–Sulfur Batteries

Design Principles of Single Atoms on Carbons for Lithium–Sulfur Batteries

Photocatalytic Reforming for Hydrogen Evolution: A Review

Mesoporous TiO2 mixed crystals for photocatalytic pure water splitting

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