Photocurrent and photoelectrochemical hydrogen production with tin porphyrin and platinum nanowires immobilized with nafion on glassy carbon electrode

• Published in: International journal of hydrogen energy Vol. 34; no. 1; pp. 110 - 114
• Main Authors: Ajayi, Folusho F., Chae, Kyoung-Yeol Kim, Kyu-Jung, Choi, Mi-jin, Kim, In S.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 2009; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; Electrodes; Energy; Exact sciences and technology; Fuels; Glassy carbon; Hydrogen; Nafion; Nanowires; Photo-electrochemical hydrogen production; Photocurrent; Photocurrent production; Photoelectric effect; Platinum; Platinum nanowires; Porphyrins; Silver; Tin porphyrin; Photocurrent production; Photo-electrochemical hydrogen production; Platinum nanowires; Tin porphyrin; Nafion; Photo-electrochemical; Platinum; Porphyrin; Carbon electrode; Tin; Nanowires; Photoelectric current; Hydrogen production
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2008.09.092

Platinum nanowires mixed with Tin meso-tetra (4-pyridyl) porphine dichloride and nafion solution was used to modify the surface of glassy carbon electrode for photocurrent generation and photo-electrochemical hydrogen production. Different concentrations of porphyrin (50
μM, 100
μM, 300
μM and 500
μM) and platinum loading (200
μg/cm
2, 400
μg/cm
2, 600
μg/cm
2 and 800
μg/cm
2) were tested at −150
mV Vs Ag/AgCl in reaction cell containing the modified glassy carbon electrode as working electrode, platinum wire as counter electrode and Ag/AgCl as reference electrode, under illumination to determine the optimum, based on photocurrent production in 50
mM potassium hydrogen phthalate buffer (pH 3) containing 0.1Na
2SO
4 as supporting electrolyte. Optimum photocurrent was obtained at 100
μM tin porphyrin and 600
μg/cm
2 platinum loading. Detectable amount of hydrogen was produced at −350
mV Vs Ag/AgCl under irradiation with visible light.