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首页> 外文期刊>Energy & environmental science >N-doped graphene quantum sheets on silicon nanowire photocathodes for hydrogen production
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N-doped graphene quantum sheets on silicon nanowire photocathodes for hydrogen production

机译：硅纳米线光电阴极上的N掺杂石墨烯量子片用于制氢

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摘要

Photoelectrochemical hydrogen production from solar energy has been attractingmuch attention in the field of renewable energy technology. The realization of cost-effective hydrogen production by water splitting requires electrolysis or photoelectrochemical cells decorated with highly efficient co-catalysts. A critical requirement for catalysts in photoelectrochemical cells is not only the ability to boost the kinetics of a chemical reaction but also to exhibit durability against electrochemical and photoinduced degradation. In the race to replace previous noble-metal catalysts, the design of carbon-based catalysts represents an important research direction in the search for non-precious, environmentally benign, and corrosion-resistant catalysts. Herein, we suggest graphene quantum sheets as a catalyst for the solar-driven hydrogen evolution reaction on Si nanowire photocathodes. The optimum nanostructures of the Si photocathodes exhibit an enhanced photocurrent and a lower overpotential compared to those of a planar Si surface. This significant enhancement demonstrates how graphene quantum sheet catalysts can be used to produce Si nanowire photocathodes as hydrogen evolution reaction catalysts with high activity.
机译：在可再生能源技术领域，由太阳能产生光电化学氢已经引起了广泛的关注。通过水分解来实现具有成本效益的制氢，需要电解或装有高效助催化剂的光电化学电池。对光电化学电池中催化剂的关键要求不仅是增强化学反应动力学的能力，而且还必须具有抵抗电化学和光诱导降解的耐久性。在替代以前的贵金属催化剂的竞赛中，碳基催化剂的设计代表了寻找非贵重，对环境无害且耐腐蚀的催化剂的重要研究方向。在这里，我们建议石墨烯量子片作为催化剂在Si纳米线光电阴极上进行太阳驱动的氢释放反应。与平面Si表面的那些相比，Si光电阴极的最佳纳米结构表现出增强的光电流和较低的过电势。这一显着增强表明，石墨烯量子片催化剂可用于生产具有高活性的氢释放反应催化剂，以制备硅纳米线光电阴极。

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  • 来源
    《Energy & environmental science》 |2015年第4期|1329-1338|共10页
  • 作者

    Sim Uk; Moon Joonhee; An Junghyun; Kang Jin Hyoun; Jerng Sung Eun; Moon Junsang; Cho Sung-Pyo; Hong Byung Hee; Nam Ki Tae;

  • 作者单位

    Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Chem, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Chem, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Chem, Seoul 151744, South Korea|Seoul Natl Univ, Natl Ctr Inter Univ Res Facil, Seoul 151744, South Korea;

    Seoul Natl Univ, Dept Chem, Seoul 151744, South Korea|Seoul Natl Univ, Grad Sch Convergence Sci & Technol, Suwon 443270, South Korea;

    Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea;

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