Atomically isolated nickel species anchored on graphitized carbon for efficient hydrogen evolution electrocatalysis.
Atomically isolated nickel species anchored on graphitized carbon for efficient hydrogen evolution electrocatalysis.
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DOI：
10.1038/ncomms10667
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发表时间：
2016-02-10
影响因子：
16.6
通讯作者：
Yao X
中科院分区：
文献类型：
--
作者：
Fan L;Liu PF;Yan X;Gu L;Yang ZZ;Yang HG;Qiu S;Yao X
通过电化学过程生产氢气是包括水分解和氢燃料电池在内的关键可再生能源技术的核心。尽管付出了巨大的努力，但寻找廉价、高效和耐用的析氢电催化剂仍然是一个巨大的挑战。在这里，我们合成了一种镍-碳基催化剂，通过碳化金属-有机骨架，以取代目前最著名的铂基材料，用于电催化析氢。这种镍-碳基催化剂在施加电化学势的情况下可以被活化，在石墨炭载体上获得孤立的镍原子，表现出高效的析氢性能，高交换电流密度为1.2 mA cm−2，并具有令人印象深刻的耐用性。这项工作可能为大规模电解水的原子尺度电催化剂的设计和性能调整提供新的机会。在开发放氢电催化剂方面正在进行着巨大的努力。本文报道了分散在石墨化载体上的单个镍原子是由金属-有机骨架碳化形成的，它们是高活性的析氢催化剂。
Hydrogen production through electrochemical process is at the heart of key renewable energy technologies including water splitting and hydrogen fuel cells. Despite tremendous efforts, exploring cheap, efficient and durable electrocatalysts for hydrogen evolution still remains as a great challenge. Here we synthesize a nickel–carbon-based catalyst, from carbonization of metal-organic frameworks, to replace currently best-known platinum-based materials for electrocatalytic hydrogen evolution. This nickel-carbon-based catalyst can be activated to obtain isolated nickel atoms on the graphitic carbon support when applying electrochemical potential, exhibiting highly efficient hydrogen evolution performance with high exchange current density of 1.2 mA cm−2 and impressive durability. This work may enable new opportunities for designing and tuning properties of electrocatalysts at atomic scale for large-scale water electrolysis. There is tremendous ongoing effort in the development of electrocatalysts for hydrogen evolution. Here, the authors report that single nickel atoms dispersed on graphitic supports are formed by carbonization of metal-organic frameworks and that they are highly active hydrogen evolution catalysts.