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首页> 外文期刊>Advanced Functional Materials >Unique PCoN Surface Bonding States Constructed on g-C3N4 Nanosheets for Drastically Enhanced Photocatalytic Activity of H-2 Evolution
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Unique PCoN Surface Bonding States Constructed on g-C3N4 Nanosheets for Drastically Enhanced Photocatalytic Activity of H-2 Evolution

机译：在g-C3N4纳米片上构建的独特PCoN表面键合状态，可大幅增强H-2的光催化活性

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摘要

Developing high-efficiency and low-cost photocatalysts by avoiding expensive noble metals, yet remarkably improving H-2 evolution performance, is a great challenge. Noble-metal-free catalysts containing Co(Fe)NC moieties have been widely reported in recent years for electrochemical oxygen reduction reaction and have also gained noticeable interest for organic transformation. However, to date, no prior studies are available in the literature about the activity of N-coordinated metal centers for photocatalytic H-2 evolution. Herein, a new photocatalyst containing g-C3N4 decorated with CoP nanodots constructed from low-cost precursors is reported. It is for the first time revealed that the unique P((-))Co((+))N((-)) surface bonding states lead to much superior H-2 evolution activity (96.2 mu mol h(-1)) compared to noble metal (Pt)-decorated g-C3N4 photocatalyst (32.3 mu mol h(-1)). The quantum efficiency of 12.4% at 420 nm is also much higher than the record values (approximate to 2%) of other transition metal cocatalysts-loaded g-C3N4. It is believed that this work marks an important step toward developing high-performance and low-cost photocatalytic materials for H-2 evolution.
机译：通过避免使用昂贵的贵金属来开发高效且低成本的光催化剂，同时显着提高H-2的析出性能，是一个巨大的挑战。近年来，已广泛报道了含有Co（Fe）NC部分的无贵金属催化剂，用于电化学氧还原反应，并且也引起了人们对有机转化的关注。但是，迄今为止，在文献中尚无关于N配位金属中心对光催化H-2进化的活性的先前研究。在本文中，报道了一种新型的含有g-C3N4的光催化剂，该光催化剂装饰有由低成本前体构成的CoP纳米点。首次揭示了独特的P（（-））Co（（+））N（（-））表面键合状态导致更优异的H-2演化活性（96.2μmol·h（-1））与贵金属（Pt）装饰的g-C3N4光催化剂（32.3μmol h（-1））相比。在420 nm处的量子效率为12.4％，也远高于其他负载过渡金属助催化剂的g-C3N4的记录值（约2％）。可以相信，这项工作标志着迈向为H-2演化开发高性能和低成本光催化材料的重要一步。

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  • 来源
    《Advanced Functional Materials》 |2017年第4期|1604328.1-1604328.8|共8页
  • 作者

    Li Chunmei; Du Yonghua; Wang Danping; Yin Shengming; Tu Wenguang; Chen Zhong; Kraft Markus; Chen Gang; Xu Rong;

  • 作者单位

    Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore|Harbin Inst Technol, Sch Chem & Chem Engn, MIT Key Lab Crit Mat Technol New Energy Convers &, Harbin 150001, Peoples R China|Jiangsu Univ, Inst Green Chem & Chem Technol, Zhenjiang 212013, Peoples R China;

    Inst Chem & Engn Sci, 1 Pesek Rd, Singapore 627833, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore|Natl Res Fdn, CREATE C4T, CREATE Tower,1 Create Way, Singapore 138602, Singapore|Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge CB2 3RA, England;

    Harbin Inst Technol, Sch Chem & Chem Engn, MIT Key Lab Crit Mat Technol New Energy Convers &, Harbin 150001, Peoples R China;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, 62 Nanyang Dr, Singapore 637459, Singapore|Natl Res Fdn, CREATE C4T, CREATE Tower,1 Create Way, Singapore 138602, Singapore;

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  • 关键词

    CoP; g-C3N4; dual molecular mechanism; photocatalytic H-2 evolution; surface bonding state;

    机译：CoP;g-C3N4;双重分子机理;光催化H-2析出;表面键合态;

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