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JOURNAL OF MATERIALS SCIENCE · 2017 ·Vol. 52 ·期 9 ·5155-5164 · IF 2.599

Effects of sacrificial reagents on photocatalytic hydrogen evolution over different photocatalysts

Wang Mingjie,Shen Shuling,Li Long,Tang Zhihong,Yang Junhe

The effect of sacrificial reagents (SRs) on photocatalytic H 2 evolution rate over different photocatalysts was systematically studied. Zn 0.5 Cd 0.5 S, graphitic carbon nitride (g-C 3 N 4 ), and TiO 2 were chosen as typical photocatalysts, while alcohols, amines, carboxylic acids, and inorganic Na 2 S/Na 2 SO 3 were chosen as SRs. The results indicate that Na 2 S/Na 2 SO 3 , methanol, and triethanolamine are the most suitable SRs for Zn 0.5 Cd 0.5 S, TiO 2 , and g-C 3 N 4 , respectively. It was found that in selecting organic SRs, both the permittivity and oxidation potential have profound effects on the H 2 production efficiency, which will provide basis for choosing appropriate SRs for different photocatalysts.

CAS / MDL: 112-90-3 7757-82-6 1313-82-2

研究领域: 化学 · 材料科学

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CHEMICAL ENGINEERING JOURNAL · 2022 · IF 16.744

Enhancing photoelectrochemical cathodic protection performance by facile tuning sulfur redox state in sacrificial agents

Daming Gong,Shouwu Xu,Kaili Zhang,Lili Du,Ping Qiu

Photocathodic protection (PCP) performance is restricted by the photogenerated charges separation efficiency. This study reported a facile approach to enhance PCP performance. Na 2 S, Na 2 SO 3 , Na 2 S 2 O 3 , Na 2 SO 4 , and NaCl was selected as sacrificial agents, in which the PCP performance is characterized by coupling TiO 2 and TiO 2 /ZnSe composites with 304 stainless steel. TiO 2 /ZnSe photoanode presented the best PCP performance in Na 2 S media. The maximum potential drop is 466.7 mV, which is about 3.5 times higher than that of in NaCl media. The corresponding photocurrent density is 270.7 μA/cm 2 , which is about 10 times higher than that of in NaCl media. Based on circle voltammetry and ultraviolet photo-electron spectroscopy characterization, it was found that the redox potential of the sacrificial reagent governs the migration and consumption of photogenerated holes of the photoanode.

研究领域: 材料科学 · 电化学

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Effects of sacrificial reagents on photocatalytic hydrogen evolution over different photocatalysts

Enhancing photoelectrochemical cathodic protection performance by facile tuning sulfur redox state in sacrificial agents