求助，光催化，电催化产氢问题？DOI: 10.1039/c7cy02456h The photocatalytic H2 evolution reactions were carried out in a Pyrex reaction cell connected to a closed gas circulation and evacuation system using a 300 W xenon (Xe) lamp (Beijing Aulight Technology Co. Ltd., Beijing, China) with a cut- off filter (λ 420 nm). Photocatalyst (0.05 g) was added to an aqueous solution (50 mL) containing sodium sulfide (Na 2 S; 0.35 M) and sodium sulfite (Na2SO3 ; 0.25 M) in a 300 mL Pyrex glass reactor, and then the suspension was ultrasonically dispersed for 10 min. Prior to irradiation, the reactor was thoroughly evacuated using a vacuum pump to remove the dissolved air in the water. The amount of H2 evolved was analyzed using on-line gas chromatography with a thermal con- ductivity detector (Hua'ai, GC9160, China, MS-5A) with argon as the carrier gas. The co-catalyst (Pt) for the promotion of H2 evolution was photodeposited in situ on the photocatalyst with chloroplatinic acid hexahydrate (H2PtCl6 ·6H2O) as the precursor. The temperature for all photocatalytic reactions was kept at 25 °C ± 5 °C.查看更多
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