Enhanced hydrogen production of PbTe-PbS/TNAs electrodes modified with ordered mesoporous carbon

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:504

Article

Gao, Shiyuan¹  Wang, Bin¹  Liu, Zhongqing¹ 

[1] Sichuan Univ, Sch Chem Engn, Chengdu 610065, Sichuan, Peoples R China

关键词: PbTe-PbS;    TiO2 naotube arrays;    Ordered mesoporous carbon;    Electrocatalysis;   

DOI  :  10.1016/j.jcis.2017.06.015

来源: Elsevier

【 摘 要 】

PbTe-PbS/TiO2 nanotube arrays (PbTe-PbS/TNAs) were synthesized by the successive ionic layer adsorption and reaction (SILAR) followed by linear sweep voltammetry (LSV). Using Nafion as a binder, ordered mesoporous carbon was cast on these materials to generate the modified electrodes OMC/PbTe-PbS/ TNAs. It was demonstrated that the electrode modification with OMC could enhance the charge transfer between the electrode surface and the electrolyte solution, improve the energy band bending of the electrode/electrolyte interface, increase the active electrochemical surface area of the electrode, and reduce the overpotential of the electrode reactions. Under ambient conditions, the short circuit current density (37.84 mA cm(-2)) and the active electrochemical surface area (29 mF cm(-2)) of the OMC/PbTe-PbS/TNAs electrode were 27.49% and 36.79% higher than that of PbTe-PbS/TNAs (29.68 mA cm(-2) and 21.2 mF cm-2), respectively. A particularly important feature of the OMC modification is that the hot electron extraction capability of the PbTe-PbS/TNAs electrode remained in the new system to provide rapid enhancement of short circuit current density upon increasing temperature. The OMC/PbTe-PbS/ TNAs electrode registered a hydrogen generation rate of 11 mL cm(2)h(-1), with an energy efficiency of 98.79% and a heat efficiency of 43.03% under cell voltage of 1.0 V at 55 degrees C. (C) 2017 Elsevier Inc. All rights reserved.

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