Photocatalytic uphill conversion of natural gas beyond the limitation of thermal reaction systems

Shimada, Shoji; Peng, Xiaobo; Yamaguchi, Akira; Watanabe, Ryo; Fukuhara, Choji; Cho, Yohei; Yamamoto, Tomokazu; Matsumura, Shuichi; Yu, Min‐Wen; Ishii, Satoshi; Fujita, Takeshi; Abe, Hideki; Miyauchi, Mutsumi

doi:10.1038/s41929-019-0419-z

Cited by 207 publications

(187 citation statements)

References 29 publications

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“…Very recently, the research group of Miyauchi expanded the investigation in photo-thermal DRM with two papers, in which the researchers studied the role of Rh as a plasmonic metal with two different supports, namely SrTiO 3 and TaON. 245,246 Surprisingly, in both cases the catalytic system tested exceeded the theoretical thermal limit calculated by using thermodynamic simulation software. Shoji et al observed that the Rh based catalytic system supported on strontium titanate (Rh/STO) irradiated with a 150 W Hg-Xe lamp converts CH 4 and CO 2 giving H 2 with a yield higher than 50% even at a temperature of 200 1C, while the performance in dark conditions was less than half even at 450 1C.…”

Section: Methane Activationmentioning

confidence: 83%

Fundamentals and applications of photo-thermal catalysis

et al. 2021

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Section: Methane Activationmentioning

confidence: 83%

Fundamentals and applications of photo-thermal catalysis

et al. 2021

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“…Recently Shoji et al reported DRM over Rh/SrTiO 3 (STO) under UV light irradiation. [157] The Rh nanoparticles acted as the catalytic centers. The catalyst achieved >50% DRM conversion.…”

Section: Photocatalytic Conversion Of Ch 4 With Comentioning

confidence: 99%

Catalytic Oxidation of Methane to Oxygenated Products: Recent Advancements and Prospects for Electrocatalytic and Photocatalytic Conversion at Low Temperatures

Shah

Park

et al. 2020

Advanced Science

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Methane is an important fossil fuel and widely available on the earth's crust. It is a greenhouse gas that has more severe warming effect than CO 2. Unfortunately, the emission of methane into the atmosphere has long been ignored and considered as a trivial matter. Therefore, emphatic effort must be put into decreasing the concentration of methane in the atmosphere of the earth. At the same time, the conversion of less valuable methane into value-added chemicals is of significant importance in the chemical and pharmaceutical industries. Although, the transformation of methane to valuable chemicals and fuels is considered the "holy grail," the low intrinsic reactivity of its C-H bonds is still a major challenge. This review discusses the advancements in the electrocatalytic and photocatalytic oxidation of methane at low temperatures with products containing oxygen atom(s). Additionally, the future research direction is noted that may be adopted for methane oxidation via electrocatalysis and photocatalysis at low temperatures.

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“…Very recently, Shoji et al . reported gas‐phase uphill photocatalysis using oxygen ion mediators in a metal oxide lattice to drive dry reforming of methane (DRM; CH 4 +CO 2 →2CO+2H 2 , ΔG 298K =+171 kJ mol −1 ) [19] . This DRM reaction is highly endothermic and difficult to accomplish under low temperature, however, it is advantageous since greenhouse gases can be converted to synthesis gas, which is used as a chemical raw material to produce alcohol, gasoline, and other chemical products [20–24] .…”

Section: Introductionmentioning

confidence: 99%

“…Shoji et al . used rhodium (Rh)‐loaded strontium titanate (SrTiO 3 ) in particulate form as a photocatalyst to run the DRM reaction under UV light irradiation, and they found that the oxygen ions in SrTiO 3 acted as mediators to link the methane oxidation and the CO 2 reduction [19] . However, they used powder forms and their redox reaction sites remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Gas‐Phase Photoelectrocatalysis Mediated by Oxygen Ions for Uphill Conversion of Greenhouse Gases

et al. 2020

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The present study reports a gas‐phase photoelectrochemical (GPEC) system in which photoanode and photocathode materials are coated on each side with a pellet of the oxygen‐ion conductor yttria‐stabilized zirconia (YSZ), where light irradiation is feasible on both sides. As a model gas‐phase reaction, we chose dry reforming of methane (DRM), which converts greenhouse gases into valuable syngas. Consequently, the stoichiometric DRM reaction proceeded in our GPEC system, indicating that the oxygen ions in a YSZ pellet act as mediators to link the redox reactions. It was also noted that UV light irradiation on the anodic side was more effective than that on the cathodic side, suggesting that the photogenerated holes in the anodic YSZ side activate methane molecules, while photogenerated electrons are injected into Rh nanoparticles to cause carbon dioxide reduction in the cathodic side. Our GPEC system converts greenhouse gases into valuable syngas by light irradiation.

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Photocatalytic uphill conversion of natural gas beyond the limitation of thermal reaction systems

Cited by 207 publications

References 29 publications

Fundamentals and applications of photo-thermal catalysis

Fundamentals and applications of photo-thermal catalysis

Catalytic Oxidation of Methane to Oxygenated Products: Recent Advancements and Prospects for Electrocatalytic and Photocatalytic Conversion at Low Temperatures

Gas‐Phase Photoelectrocatalysis Mediated by Oxygen Ions for Uphill Conversion of Greenhouse Gases

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