強化された水素進化反応活動のための分岐したNiナノ粒子上の高張力Pt群の直接成長
Ali Alinezhad1, Lucy Gloag1, Tania M Benedetti1
1School of Chemistry , The University of New South Wales , Sydney , New South Wales 2052 , Australia.
Journal of the American Chemical Society
|October 4, 2019
まとめ
ニッケル (Ni) ナノ粒子で育った高張力プラチナ (Pt) 島は,水素進化反応 (HER) の活性を促進します. アルカリの電解質の電気触媒性能を向上させる.
科学分野:
- 材料科学
- 電気化学
- ナノテクノロジー
背景:
- プラチナ (Pt) 島を格子に適合しないニッケル (Ni) ナノ粒子で直接成長させることは,重要な合成のハードルを提示します.
- 高圧のPt原子を作り出すことは,先進的な電触媒のための有望なアプローチです.
研究 の 目的:
- Niナノ粒子に直接調整可能なストレスを加えたPt島を合成する方法を開発する.
- 水素進化反応 (HER) のためのストレートPt島の電解活性を調査する.
主な方法:
- 枝分かれしたNiナノ粒子にPt島を直接増殖させるには,非常に温和な反応条件を使用した.
- Pt島の大きさとストレスを特徴付けました.
- 13 pHの電解質で HERの性能を評価した.
主要な成果:
- Ni分岐粒子に直接調整可能なPt島を形成しました.
- 枝分かれしたNiナノ粒子の高度に張られた1. 9nmのPt島は高特異活性を示した.
- これらのナノ構造を用いて,pH13の電解質でHERの最大質量活性を達成した.
結論:
- Niナノ粒子のストレートPt島を直接合成することは,穏やかな条件下で実現可能である.
- Pt島サイズに対する合成制御は,ストレスの調整を可能にし,HERの活性を増強します.
- これらの発見は,効率的な水素生産のためにPtベースの電解剤を最適化するための経路を提供します.
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