title: Dissolution Engineering of Platinum Alloy Counter Electrodes in Dye-Sensitized Solar Cells.
abstract: The dissolution of platinum (Pt) has been one of the heart issues in developing advanced dye-sensitized solar cells (DSSCs). We present here the experimental realization of stable counter-electrode (CE) electrocatalysts by alloying Pt with transition metals for enhanced dissolution resistance to state-of-the-art iodide/triiodide (I(-)/I3(-)) redox electrolyte. Our focus is placed on the systematic studies of dissolution engineering for PtM0.05 (M=Ni, Co, Fe, Pd, Mo, Cu, Cr, and Au) alloy CE electrocatalysts along with mechanism analysis from thermodynamical aspects, yielding more negative Gibbs free energies for the dissolution reactions of transition metals. The competitive reactions between transition metals with iodide species (I3(-), I2) could protect the Pt atoms from being dissolved by redox electrolyte and therefore remain the high catalytic activity of the Pt electrode.
authors.affiliation: Key Laboratory of Marine Chemistry and Technology, Ministry of Education, Ocean University of China, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao 266100 (P.R. China). tangqunwei@ouc.edu.cn.|Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 (P.R. China). tangqunwei@ouc.edu.cn.
authors.forename: Qunwei
authors.initials: Q
authors.lastname: Tang
authors.affiliation: Key Laboratory of Marine Chemistry and Technology, Ministry of Education, Ocean University of China, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao 266100 (P.R. China).|Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 (P.R. China).
authors.forename: Huihui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Marine Chemistry and Technology, Ministry of Education, Ocean University of China, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao 266100 (P.R. China).|Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 (P.R. China).
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Meng
authors.affiliation: Key Laboratory of Marine Chemistry and Technology, Ministry of Education, Ocean University of China, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao 266100 (P.R. China).|Institute of Materials Science and Engineering, Ocean University of China, Qingdao 266100 (P.R. China).
authors.forename: Benlin
authors.initials: B
authors.lastname: He
authors.affiliation: Key Laboratory of Marine Chemistry and Technology, Ministry of Education, Ocean University of China, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao 266100 (P.R. China). yuyan@ouc.edu.cn.
authors.forename: Liangmin
authors.initials: L
authors.lastname: Yu
keywords: catalytic activity; counter electrodes; dissolution resistance; dye-sensitized solar cells; electrocatalysis