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Engineering the Metal–Support Interaction on Pt/TiO2 Catalyst to Boost the H2-SCR of NOx
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-07-10 , DOI: 10.1021/acs.iecr.0c01792 Zhiming Liu 1, 2 , Bin Jia 1, 2 , Yiyang Zhang 1, 2 , Masaaki Haneda 3, 4
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-07-10 , DOI: 10.1021/acs.iecr.0c01792 Zhiming Liu 1, 2 , Bin Jia 1, 2 , Yiyang Zhang 1, 2 , Masaaki Haneda 3, 4
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A Pt/TiO2 catalyst fabricated via a sacrificial carbon layer strategy has been studied for the selective catalytic reduction (SCR) of NOx with H2. Modified Pt/TiO2 exhibited superior low-temperature activity for the reduction of NOx in a wide temperature window (100–250 °C). Through the sacrificial carbon layer strategy, the strong metal–support interaction (SMSI) was induced over the modified Pt/TiO2. SMSI effect gives rise to electron transfer from TiO2 to Pt and forms more Pt0 species, which are the favorable active sites for the H2-SCR of NOx. Furthermore, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies demonstrated that the SMSI effect not only promotes the adsorption and activation of NOx but also improves the reactivity of the adsorbed NOx species and the formation of more new, active NH3 species. As a consequence, the H2-SCR performance of the modified Pt/TiO2 is significantly enhanced. Our study demonstrated the key role of SMSI engineering and paves a new way for fabricating high-performance H2-SCR catalysts for the practical removal of NOx.
中文翻译：
工程上的Pt /二氧化钛的金属-载体相互作用2催化剂，以提高为H 2 NO的-SCR X
已经研究了通过牺牲碳层策略制造的Pt / TiO 2催化剂，用于H 2选择性催化还原NO x。改性的Pt /二氧化钛2表现出优异的低温对NO的还原活性X在宽的温度窗口（100-250℃）。通过牺牲碳层策略，在改性的Pt / TiO 2上诱导了强金属-载体相互作用（SMSI）。SMSI效应引起电子从TiO 2转移到Pt并形成更多的Pt 0物种，这是NO x的H 2 -SCR的有利活性中心。此外，在原位漫反射红外线傅里叶变换证明SMSI效果不仅促进NO的吸附和活化光谱（DRIFTS）的研究X又提高了吸附NO的反应性X物种和更新的形成，活性NH 3种类。结果，改性的Pt / TiO 2的H 2 -SCR性能显着提高。我们的研究证明了SMSI工程的关键作用，并为制造用于实际去除NO x的高性能H 2 -SCR催化剂开辟了一条新途径。
更新日期：2020-08-05
中文翻译：
工程上的Pt /二氧化钛的金属-载体相互作用2催化剂，以提高为H 2 NO的-SCR X
已经研究了通过牺牲碳层策略制造的Pt / TiO 2催化剂，用于H 2选择性催化还原NO x。改性的Pt /二氧化钛2表现出优异的低温对NO的还原活性X在宽的温度窗口（100-250℃）。通过牺牲碳层策略，在改性的Pt / TiO 2上诱导了强金属-载体相互作用（SMSI）。SMSI效应引起电子从TiO 2转移到Pt并形成更多的Pt 0物种，这是NO x的H 2 -SCR的有利活性中心。此外，在原位漫反射红外线傅里叶变换证明SMSI效果不仅促进NO的吸附和活化光谱（DRIFTS）的研究X又提高了吸附NO的反应性X物种和更新的形成，活性NH 3种类。结果，改性的Pt / TiO 2的H 2 -SCR性能显着提高。我们的研究证明了SMSI工程的关键作用，并为制造用于实际去除NO x的高性能H 2 -SCR催化剂开辟了一条新途径。
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