Biornimetic hydrogen evolution:: MoS2 nanoparticles as catalyst for hydrogen evolution
Biornimetic hydrogen evolution:: MoS2 nanoparticles as catalyst for hydrogen evolution
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DOI：
10.1021/ja0504690
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发表时间：
2005-04-20
影响因子：
15
通讯作者：
Norskov, JK
中科院分区：
文献类型：
--
作者：
Hinnemann, B;Moses, PG;Norskov, JK
铂族金属对电化学析氢反应的催化效果最好。由于氢气被认为是未来的能源载体，对这些催化剂的需求将会增加，需要替代稀有和昂贵的铂族催化剂。我们分析了不同金属表面以及固氮酶和氢酶催化析氢反应的能力，找到了高催化活性的必要判据。必要的判据是原子氢与催化剂的结合自由能接近于零。该判据使我们能够寻找新的催化剂，并且受到固氮酶活性中心的启发，我们发现石墨负载的纳米MoS_2是一种很有前途的催化剂。它们在0.1V−0.2V的中等过电位下催化电化学析氢。
The electrochemical hydrogen evolution reaction is catalyzed most effectively by the Pt group metals. As H2is considered as a future energy carrier, the need for these catalysts will increase and alternatives to the scarce and expensive Pt group catalysts will be needed. We analyze the ability of different metal surfaces and of the enzymes nitrogenase and hydrogenase to catalyze the hydrogen evolution reaction and find a necessary criterion for high catalytic activity. The necessary criterion is that the binding free energy of atomic hydrogen to the catalyst is close to zero. The criterion enables us to search for new catalysts, and inspired by the nitrogenase active site, we find that MoS2nanoparticles supported on graphite are a promising catalyst. They catalyze electrochemical hydrogen evolution at a moderate overpotential of 0.1−0.2 V.