Yazar "Patir I.H." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Facile preparation of amorphous NiWSex and CoWSex nanoparticles for the electrocatalytic hydrogen evolution reaction in alkaline condition
    (Elsevier B.V., 2020) Aslan E.; Sarilmaz A.; Yanalak G.; Chang C.S.; Cinar I.; Ozel F.; Patir I.H.
    The development of catalysts as an alternative to platinum group metals (PGMs) has great importance to improve the efficiency of hydrogen evolution reaction (HER). Herein, the novel amorphous ternary refractory metal selenides (MWSex; M = Co and Ni), which were synthesized by hot-injection approach, were firstly investigated on the electrocatalytic HER in alkaline media. Optical, electrochemical and magnetic properties of the electrocatalysts were explored, as well as the chemical structures and morphologies. These results clearly show that the obtained materials are having the amorphous crystal structure and are shaped as spherical and rod-like structures. Moreover, the addition of Ni and Co metals into the WSex structure were raised the catalytic activity of HER comparing to that of only WSex. This work paves the way for the exploration of copper-based amorphous selenides as electrocatalysts for the hydrogen evolution in order to replace noble metal Pt. © 2019 Elsevier B.V.
  • Küçük Resim Yok
    Öğe
    Photocatalytic hydrogen evolution reaction activity comparable to 1-D nanofiber materials exhibited by the kesterite nanorods catalysts
    (Elsevier Ltd, 2020) Yanalak G.; Sarılmaz A.; Aslan E.; Ozel F.; Patir I.H.
    Copper-based earth-abundant chalcogenides (kesterite) such as Cu2CoSnS4 and Cu2NiSnS4 are important class due to their outstanding performance and earth-abundant composition. Here, we have successfully synthesized Cu2CoSnS4, Cu2NiSnS4 and Cu2ZnSnS4 nanorods by a hot-injection technique. The photocatalytic hydrogen production activities of rod-like Cu2XSnS4 (X = Co, Ni and Zn) catalysts have been investigated by using electron donor triethanolamine and photosensitizer eosin-Y under visible-light irradiation. The hydrogen evolution rates for the nanorods change in the order of Cu2NiSnS4> Cu2CoSnS4> Cu2ZnSnS4 (5117 ?molg?1h?1, 1342 ?molg?1h?1 and 719 ?molg?1h?1) respectively. The hydrogen evolution activities of Cu2XSnS4 nanorods have been compared to that of nanofiber and nanodot forms of Cu2XSnS4 catalysts. Cu2XSnS4 nanorods have been showed comparable photocatalytic activity for the hydrogen evolution compared with 1-D nanofiber Cu2XSnS4 catalysts. © 2020 Elsevier Ltd