纳米孔
催化作用
硼氢化
铜
选择性
合金
气凝胶
材料科学
化学
化学工程
吸附
无机化学
纳米技术
物理化学
冶金
有机化学
工程类
作者
Jiali Wang,Fuyi Chen,Yachao Jin,Roy L. Johnston
出处
期刊:Chemsuschem
[Wiley]
日期:2018-02-13
卷期号:11 (8): 1354-1364
被引量:33
标识
DOI:10.1002/cssc.201800052
摘要
Abstract We, for the first time, report the successful synthesis of self‐assembled AuCu aerogels by a one‐pot kinetically controlled approach. A startling electronic modulation effect of Cu on Au was observed across the entire alloy composition range, for which the optimal upshift of the d‐band center for the highest activities was 0.24 eV. Owing to the combination of a nanoporous architecture and a robust electronic effect, the Au 52 Cu 48 aerogels exhibited better catalytic performance for the oxygen reduction reaction (ORR) and the direct borohydride oxidation reaction (BOR) than commercial Pt/C catalysts. The specific and mass ORR activities were 4.5 and 6.3 times higher, respectively, on the Au 52 Cu 48 aerogels than on Pt/C with negligible activity decay even after 10 000 cycles and a duration of 40 000 s. For the BOR, the Au 52 Cu 48 aerogels also exhibited far better selectivity and activity than Pt/C. The new AuCu aerogels show great potential as a promising alternative for Pt‐based catalysts in fuel cells.
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