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  • 化學與環境工程學院劉劍洪、張黔玲團隊在《Energy & Environmental Science》發表論文

    發布時間:2019-04-09

    我校化學與環境工程學院劉劍洪、張黔玲團隊在石墨烯負載鉑單原子作電催化劑方面取得重大進展。研究成果以“Highly stable single Pt atomic sites anchored on aniline-stacked graphene for hydrogen evolution reaction”為題發表在化學頂級期刊《Energy & Environmental Science》(Energy Environ. Sci., 2019, 1000)(影響因子為30.87,中科院JCR一區,Top期刊)上。課題組葉盛華博士,羅飛燕碩士和張黔玲教授是論文的第一作者,深圳大學為第一完成單位和通訊單位,加拿大西安大略大學孫學良教授為共同通訊作者。這是我校首次在該期刊上發表的高水平論文。

    氫能作為一種重要的清潔能源,具有高能量密度、可再生和清潔無污染的優點,在未來綠色新能源開發中占據著極其重要的地位。隨著電能的普及和成本的下降,電解水制氫成為未來最有效的制氫方法。因此,開發高效的HER電催化劑是電解水制氫大規模工業化應用的關鍵。該研究團隊開發了一種新穎簡便的苯胺錨定和微波還原法在石墨烯上負載鉑單原子(Pt SASs/AG)用作析氫催化劑。該方法簡單易行、制備條件溫和,制備過程中無需進行高溫處理,并且不論貴金屬前驅體用量多少,均能專一地形成單原子位點分散在石墨烯表面。同時該方法還利用了石墨烯優異的導電性能,很好地解決了單原子催化劑應用于電催化體系的技術瓶頸。研究發現,Pt SASs/AG具有優異的HER活性,在電流密度為10mA cm-2時過電勢η= 12mV,在η= 50mV時質量電流密度為22400 A g-1Pt,比市售20wt% Pt/C高46倍。 此外,Pt SASs/AG催化劑比Pt/C具有更為優異的穩定性。密度泛函理論(DFT)計算表明原子級分散的Pt位點與苯胺上的N結合優化了Pt的電子結構和氫吸附能,使得Pt單原子表現出優異的HER催化活性。該研究為單原子催化劑的制備和應用研究提供了全新的思路。

    該項目得到了國家自然科學基金,廣東省科技廳,深圳市科創委等項目的資助。

    論文鏈接:https://pubs.rsc.org/en/content/articlelanding/2019/ee/c8ee02888e#!divAbstract

     

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