Highly efficient hydrogen production and formaldehyde degradation by Cu2O microcrystals

Gao, Hong; Zhang, Junying; Wang, Rongming; Wang, Mei

doi:10.1016/j.apcatb.2015.02.004

Cited by 59 publications

(23 citation statements)

References 58 publications

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“…178 The hydrogen evolution rate increased linearly with the oxygen partial pressure, and the optimal TOF of the silver catalyst reached 6,641 hr À1 with 5 atm O 2 at 25 C. 178 This is the highest TOF for catalytic H 2 evolution from a formaldehyde/water mixture using homogeneous heterogeneous catalysts. [173][174][175][176][177][178][179][180][181][182][183][184][185][186][187][188] Because O 2 was not consumed during the enhanced H 2 evolution by O 2 , a surface stabilized MgO/Ag-, OOH complex is proposed to be the catalytically active center that directly participates in H 2 evolution and the regeneration of O 2 . 178 However, the detailed mechanism of the catalytic effect of O 2 on H 2 evolution has yet to be clarified.…”

Section: Directmentioning

confidence: 99%

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Fukuzumi

2017

Joule

177

116

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This review focuses on the production of liquid fuels using solar energy combined with their use in direct liquid fuel cells. The production of formic acid, which is the two-electron reduced product of CO 2 , as a solar liquid fuel as well as a hydrogen storage material is discussed together with its use in direct formate fuel cells. Other CO 2 reduction products such as methanol and formaldehyde as solar liquid fuels as well as hydrogen storage materials are reviewed with the performance of the corresponding fuel cells. The production of nitrogen fixation products such as ammonia and hydrazine is also reviewed together with their fuel cells. Finally, the production of hydrogen peroxide from not only pure water but also seawater and dioxygen in the air using solar energy is discussed and combined with the recent development of one-compartment hydrogen peroxide fuel cells.

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Section: Directmentioning

confidence: 99%

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Fukuzumi

2017

Joule

177

116

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“…It should be hydrolyzed into formaldehyde or methanediol in acid solution firstly, [16] then the formaldehyde could react with water and generate hydrogen. [17][18][19][20][21][22] It seems promising to produce hydrogen from paraformaldehyde through a two-steps reaction under acid condition (Scheme 1). However, the formaldehyde decomposition prefers alkaline or neutral reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

“…However, the formaldehyde decomposition prefers alkaline or neutral reaction conditions. [20][21][22][23] Few researchers report the formaldehyde catalytic decomposition in acid solution. Paraformaldehyde hydrolysis and formaldehyde catalytic decomposition require distinct reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Generation from Catalytic Reforming of Paraformaldehyde and Water by Polymeric Bifunctional Catalysts Comprising Ruthenium and Sulfonic Acid Units

et al. 2020

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As a clean and sustainable source of energy, hydrogen shows great potential to be the ultimate energy source in future. In this research, paraformaldehyde is used as hydrogen carrier. Several bifunctional catalysts are prepared for the hydrogen generation from paraformaldehyde. The bifunctional catalysts contain two catalytically active sites. One is a sulfonic acid group for paraformaldehyde hydrolysis, and the other is an organometallic group that catalyzes the hydrogen release from formaldehyde. Bifunctional iridium catalysts and bifunctional rhodium catalysts could only generate traces of hydrogen in the initial phase of paraformaldehyde decomposition. Only the bifunctional ruthenium catalyst shows high activity due to its bifunctional catalytically active sites, thus more than 98.0 % of the initially produced gas contains hydrogen. The initial TOF is 685 h−1 at 363 K when the paraformaldehyde concentration is 20 wt%. A reaction mechanism is proposed for the hydrogen generation from paraformaldehyde in which formaldehyde and formic acid are intermediates Formic acid decomposition is the rate‐determining step in the later phase of paraformaldehyde decomposition.

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“…[10][11][12][13] Cuprous oxide (Cu 2 O) is a p-type metal oxide semiconductor with a direct band gap of 2.0-2.2 eV, which makes it a potentially promising photocatalyst for the photochemical decomposition of water into O 2 and H 2 and photocatalytic degradation of organic pollutants under visible light illumination. [14][15][16][17] However, pure Cu 2 O exhibits very poor quantum efficiency because of the easy recombination between electron and hole. 18 To overcome this limitation, modication of Cu 2 O with noble metals (Ag, Au, Pt or Pd) is one of the most efficient ways.…”

Section: Introductionmentioning

confidence: 99%

One-step solvothermal synthesis of interlaced nanoflake-assembled flower-like hierarchical Ag/Cu₂O composite microspheres with enhanced visible light photocatalytic properties

et al. 2017

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Highly efficient hydrogen production and formaldehyde degradation by Cu2O microcrystals

Cited by 59 publications

References 58 publications

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Hydrogen Generation from Catalytic Reforming of Paraformaldehyde and Water by Polymeric Bifunctional Catalysts Comprising Ruthenium and Sulfonic Acid Units

One-step solvothermal synthesis of interlaced nanoflake-assembled flower-like hierarchical Ag/Cu₂O composite microspheres with enhanced visible light photocatalytic properties

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Highly efficient hydrogen production and formaldehyde degradation by Cu2O microcrystals

Cited by 59 publications

References 58 publications

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Production of Liquid Solar Fuels and Their Use in Fuel Cells

Hydrogen Generation from Catalytic Reforming of Paraformaldehyde and Water by Polymeric Bifunctional Catalysts Comprising Ruthenium and Sulfonic Acid Units

One-step solvothermal synthesis of interlaced nanoflake-assembled flower-like hierarchical Ag/Cu2O composite microspheres with enhanced visible light photocatalytic properties

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One-step solvothermal synthesis of interlaced nanoflake-assembled flower-like hierarchical Ag/Cu₂O composite microspheres with enhanced visible light photocatalytic properties