Transformation of Fe-B@Fe into Fe-B@Ni for efficient photocatalytic hydrogen evolution

Journal of Colloid and Interface Science
Yuexiang LiXu Han

Abstract

It is highly desirable to develop efficient and cost-effective composite catalysts to replace noble metal Pt for hydrogen evolution reaction (HER). For an excellent HER catalyst, both the adsorption and desorption of intermediate H atoms on it should be easy. However, except metal platinum, most individual species cannot satisfy this requirement. Fe-B is an active HER catalyst with strong ability to adsorb H atoms. In our previous work, we found that when Fe-B alloy was decorated with metal Fe particles (Fe-B@Fe), the resultant composite displayed a significant synergic effect for HER compared to single Fe-B and Fe. The role of the decorated Fe on Fe-B is to improve H2 desorption. Because the desorption of H2 molecule from Ni is easier than from Fe, we expect Fe-B@Ni to be a more efficient HER catalyst than Fe-B@Fe. Herein, we transform Fe-B@Fe into Fe-B@Ni by a facile displacement reaction. As a proof of concept, the as-prepared Fe-B@Ni catalyst exhibits much higher electrocatalytic and photocatalytic activity for hydrogen production than the pristine Fe-B@Fe. At the current density of -100 mA cm-2, the overpotential of Fe-B@Ni in 1.0 mol L-1 KOH is close to that of 20 wt% Pt/C. The highest apparent quantum yield (AQY) for dye...Continue Reading

Citations

Apr 22, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Guoping JiangZhiliang Jin
Feb 2, 2022·Dalton Transactions : an International Journal of Inorganic Chemistry·Xuanpu WangZhiliang Jin

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