期刊
CHEMICAL ENGINEERING JOURNAL
卷 344, 期 -, 页码 506-513出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.03.117
关键词
Amorphous Fe-B alloy; Fe; Core-shell structure; Hydrogen evolution; Synergic effect
资金
- National Natural Science Foundation of China [21563019, 21563020]
- Nature Science Foundation of the Jiangxi Province [20151BAB203013, 2017BAB206010]
It remains a challenge to develop efficient and inexpensive catalysts for hydrogen evolution reaction ( HER). Herein, it is the first time to report a core-shell structured amorphous Fe-B alloy coupled with metal Fe nanoclusters as an efficient HER catalyst. The composite was fabricated via the transformation of the FeOOH coating on amorphous Fe-B alloy into metal Fe through a simple photoreduction approach. The Fe nanoclusters loaded on amorphous Fe-B alloy improve the catalytic HER. Thus, the as-prepared composite exhibits much better electrocatalytic and photocatalytic HER activities than single Fe and Fe-B alloy, that is, there is a synergic effect between Fe metal and amorphous Fe-B alloy. The highest apparent quantum yield (AQY) for photocatalytic HER reaches 34% at 470 nm with Eosin Y as a photosensitizer. The composite cocatalyst can be recovered by a magnetic field after the dye-sensitized photocatalytic HER. More interestingly, the electrocatalytic HER activity of Fe-B@Fe-10 in alkaline solution surpasses that of foam Ni used in industrial water electrolysis, and the core-shell composite shows excellent HER performance at high current density. The findings provide new insights to develop efficient and stable noble-metal-free HER catalysts.
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