Yangxin Jin, Shengqin Liu, Zhe Wang, Qi Zhu, Qingguo Le, Shan Shao, Sam H.-Y. Hsu, Anqing Zheng, Jun Zhao and Jason Chun-Ho Lam
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引用次数: 0
摘要
生物质热解油（生物油）中含有丰富的乙酸（AA），但乙酸的存在会阻碍生物油的使用和储存。在这项研究中，我们开发了一种高度稳定的原位生长二氧化钌(RuO2)/二氧化钛（TiO2）催化剂，用于高电流密度的Kolbe电解（KBE），以82%（±5%）的选择性将AA转化为乙烷（C2H6）。RuO2/TiO2催化剂在100 mA cm−2条件下持续KBE至少150小时，将3300 mmol AA转化为32.6 L C2H6，法拉第效率为74.1%。即使存在与模拟生物油相关的氧合酚类和羰基化合物，以及玉米芯热解产生的真实生物油，C2H6的选择性仍然很高（C2H6的选择性为88%）。利用原位拉曼光谱分析了电极界面上的催化事件，并确定了KBE反应中对AA的独特选择性。
Low-temperature highly selective Kolbe electrolysis of acetic acid in bio-oil on a stable in situ grown RuO2/TiO2 at industrial-level current†
Acetic acid (AA) is abundant in biomass pyrolysis oil (bio-oil) but its presence can hinder the use and storage of bio-oil. In this study, we developed a highly stable in situ grown ruthenium dioxide (RuO2)/titanium dioxide (TiO2) catalyst for Kolbe electrolysis (KBE) at high current densities, converting AA to ethane (C2H6) with an 82% (±5%) selectivity. The RuO2/TiO2 catalyst sustained at least 150 hours of KBE at 100 mA cm−2, converting 3300 mmol of AA into 32.6 L of C2H6 with a faradaic efficiency of 74.1%. The selectivity for C2H6 remained high even in the presence of model bio-oil-relevant oxygenated phenolics and carbonyl compounds, and real bio-oil produced from corncob pyrolysis (88% selectivity for C2H6). In situ Raman spectroscopy was performed to examine catalytic events at the electrode interface and determine the unique selectivity toward AA during the KBE reaction.
期刊介绍：
Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences."
Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).
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