期刊
SCIENCE
卷 355, 期 6332, 页码 1399-1402出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aal3439
关键词
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资金
- Cardiff University
- Engineering and Physical Sciences Research Council (EPSRC) [EP/K014706/1, EP/K014668/1, EP/K014854/1EP/K014714/1, EP/M013219/1]
- National Science Foundation Major Research Instrumentation program [MRI/DMR-1040229]
- EPSRC [EP/L000202]
- Engineering and Physical Sciences Research Council [1785987, EP/K014854/1] Funding Source: researchfish
- EPSRC [EP/K014854/1] Funding Source: UKRI
There remains considerable debate over the active form of gold under operating conditions of a recently validated gold catalyst for acetylene hydrochlorination. We have performed an in situ x-ray absorption fine structure study of gold/carbon (Au/C) catalysts under acetylene hydrochlorination reaction conditions and show that highly active catalysts comprise single-site cationic Au entities whose activity correlates with the ratio of Au(I): Au(III) present. We demonstrate that these Au/C catalysts are supported analogs of single-site homogeneous Au catalysts and propose a mechanism, supported by computational modeling, based on a redox couple of Au(I)-Au(III) species.
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