Combinatorial high-throughput optical screening for optimum composition of highly active ruthenium based ternary catalysts in oxygen reduction reaction

被引：5
作者：
Koh, Jaekang [1 ]
Park, Sung Hyeon [2 ]
Kim, Hyeon Woo [3 ]
Kim, Yegeun [3 ]
Kang, Junha [3 ]
Park, Juseong [3 ]
Woo, Seong Ihl [1 ,2 ]
机构：
[1] Korea Adv Inst Sci & Technol, Grad Sch EEWS WCU, Taejon 305701, South Korea
[2] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea
[3] Daegu Sci High Sch, Daegu 706852, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 35期
基金：
新加坡国家研究基金会;
关键词：
Combinatorial research; Multielectrode half-cell; Optical screening; Ru-based catalysts; Fuel cell cathode; Oxygen reduction reaction; METHANOL ELECTROOXIDATION; CARBON NANOTUBES; RU NANOPARTICLES; BINARY CATALYSTS; TRANSITION-METAL; ALLOY NANOWIRES; ELECTROCATALYSTS; SELENIUM; FE; OPTIMIZATION;
D O I：
10.1016/j.ijhydene.2015.03.037
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of combinatorial optical screening analysis was operated, first for the selection of metal candidates for the ternary Ru-based catalyst and later for the selection of optimized compositions with high performance towards ORR. Among the binary Ru-based catalysts, combinations with Co and Se exhibited the highest performance towards ORR. To investigate a possible synergic effect from the selected metals, the ternary Ru-based combinatorial optical screening was preceded. Among the various combinations and compositions, the optimum composition towards ORR for ternary Ru-Se-Co based catalyst was chosen at 73:12:15 = Ru:Se:Co at. % (named RSC-1). The RSC-1 catalyst measured a current density of -1.28 mAcm(-2) at 0.75 V (vs. RHE), which was about 5 times higher than that of Ru/C (-0.26 mA cm(-2)). The mass activity of RSC-1 (12.20 mA mg(-1)) had an enhanced performance of about 6.8 times than that of Ru/C (1.78 mA mg(-1)) at 0.75 V (vs. RHE). It was deduced that a synergic effect between the repulsion of oxy-species on the Ru atoms by Se and the alternation of electron configuration by Co, the adequate amounts of Co and Se in the ternary Ru-Se-Co based catalyst could have induced the enhanced ORR performance of the RSC-1 catalyst. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：11615 / 11624
页数：10
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