Abstract
Hydrogen passivation has attracted intense interest from wide range of researchers due to the possible use of hydrogen to deactivate metallic impurities and crystallographic defects. Many different methods to achieve efficient hydrogen passivation have been developed over decades. It is common that almost all the hydrogenation methods need a cooling process. Nevertheless, few studies were done on investigating appropriate cooling processes for attaining efficient hydrogen passivation. The cooling process may reactivate defects and counteract the performance of hydrogen passivation. In this paper, we investigate two strategies, namely rapid cooling and cooling with appropriate illumination, for keeping the maximum performance of hydrogen passivation. Results suggested that both strategies were able to minimize dehydrogenation via reduced dehydrogenation time and elevated activation energy, respectively.
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