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The Z-Scheme of Electron Transport in Photosynthesis01:34

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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
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Photosystem II01:22

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The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
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Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment
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高性能Rh2Pエレクトロカタリスト 効率的な水分解

Haohong Duan1,2, Dongguo Li3, Yan Tang4

  • 1Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University , Beijing 100084, China.

Journal of the American Chemical Society
|March 28, 2017
PubMed
まとめ
この要約は機械生成です。

研究者らは,効率的な水分裂のために,新しいロジウム・フォスフィードナノ立方体触媒 (Rh2P/C) を開発した. この費用対効果の高い電気触媒は 水素と酸素の進化反応に優れた性能を示し,クリーンエネルギー技術の進歩を示しています.

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Hydrogen Production and Utilization in a Membrane Reactor
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Hydrogen Production and Utilization in a Membrane Reactor
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科学分野:

  • 材料科学
  • 電気化学
  • 再生可能エネルギー

背景:

  • 非化石燃料のエネルギー技術では,水分解のための効率的な電気触媒の開発が不可欠です.
  • 活性で安定したコスト効率の良い触媒が水素生産に必要である.

研究 の 目的:

  • 低金属負荷を持つ新しいロジウムリン酸化電触媒 (Rh2P/C) を合成し,特徴づけること.
  • 水素進化反応 (HER) と酸素進化反応 (OER) のRh2P/Cの性能を評価する.

主な方法:

  • 高表面積の炭素に分散したロジウム酸化ナノ立方体 (NCs) の容易な溶熱合成.
  • 原子構造の決定のための環状ダークフィールドスキャニング伝送電子顕微鏡 (ADF-STEM).
  • 触媒の性質を理解するための実験的および計算的研究.

主要な成果:

  • 合成されたRh2P/ CNCは,HERとOERの両方に顕著なパフォーマンスを示しました.
  • 性能は従来のRh/Cとプラチナの炭素 (Pt/C) 触媒を上回った.
  • 原子構造の分析は,NCの最も外側の原子層に富んだリンを明らかにした.

結論:

  • 表面のは,Rh2Pの強固な触媒特性にとって不可欠である.
  • 開発されたRh2P/C触媒は,効率的な水分解と水素生成のための有望な代替手段を提供します.