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Facets Matching of Platinum and Ferric Oxide in Highly Efficient Catalyst Design for Low-Temperature CO Oxidation
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-04-04 00:00:00 , DOI: 10.1021/acsami.8b03579 Yanling Ma , Fan Li , Xiaobo Ren 1, 2 , Wenlong Chen , Chao Li 3 , Peng Tao , Chengyi Song , Wen Shang , Rong Huang 3 , Baoliang Lv 1 , Hong Zhu 4 , Tao Deng , Jianbo Wu
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-04-04 00:00:00 , DOI: 10.1021/acsami.8b03579 Yanling Ma , Fan Li , Xiaobo Ren 1, 2 , Wenlong Chen , Chao Li 3 , Peng Tao , Chengyi Song , Wen Shang , Rong Huang 3 , Baoliang Lv 1 , Hong Zhu 4 , Tao Deng , Jianbo Wu
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Rational design of supported noble metal is of great importance for highly efficient heterogeneous catalysts. On the basis of the distinct adsorption characteristics of noble metal and transition-metal oxides toward O2 and CO, the overall catalytic performance of CO oxidation reaction could be further modified by controlling the surface property of the materials to achieve optimal adsorption activity. Here, we studied the influence of facets matching between both platinum and ferric oxide support on CO conversion efficiency. It shows that the activities of four catalysts rank following the order of Pt{100}/α-Fe2O3{104} > Pt{100}/α-Fe2O3{001} > Pt{111}/α-Fe2O3{001} > Pt{111}/α-Fe2O3{104}. The strong metal–support interaction and adsorption energy varying with matched enclosed surface are demonstrated by density functional theory based on the projected d-band density of states. Compared with the other three cases, the combination of Pt{100} and α-Fe2O3{104} successfully weakens CO poisoning and provides proper active sites for O2 adsorption. It reveals that the facets matching could be a practicable approach to design catalysts with enhanced catalytic performance.
中文翻译：
低温CO氧化高效催化剂设计中铂和三氧化二铁的晶面匹配
负载型贵金属的合理设计对于高效多相催化剂至关重要。根据贵金属和过渡金属氧化物对O 2和CO的独特吸附特性，可以通过控制材料的表面性质来实现最佳的吸附活性，从而进一步改变CO氧化反应的整体催化性能。在这里，我们研究了铂和三氧化二铁载体之间的晶面匹配对CO转化效率的影响。它表明的四种催化剂活性的排名以下的Pt的顺序{100} /的α-Fe 2 ö 3 {104}>的Pt {100} /的α-Fe 2 ö 3 {001}>的Pt {111} /α-铁2 O 3{001}>的Pt {111} /的α-Fe 2 ö 3 {104}。密度函数理论基于预计的d带态密度，证明了金属与载体之间的强相互作用和吸附能随匹配的封闭表面而变化。与其它三种情况相比，铂{100}和α-Fe的组合2 ö 3 {104}成功削弱CO中毒，并且提供用于O-适当活性位点2的吸附。结果表明，小面匹配可能是设计具有增强催化性能的催化剂的可行方法。
更新日期：2018-04-04
中文翻译：
低温CO氧化高效催化剂设计中铂和三氧化二铁的晶面匹配
负载型贵金属的合理设计对于高效多相催化剂至关重要。根据贵金属和过渡金属氧化物对O 2和CO的独特吸附特性，可以通过控制材料的表面性质来实现最佳的吸附活性，从而进一步改变CO氧化反应的整体催化性能。在这里，我们研究了铂和三氧化二铁载体之间的晶面匹配对CO转化效率的影响。它表明的四种催化剂活性的排名以下的Pt的顺序{100} /的α-Fe 2 ö 3 {104}>的Pt {100} /的α-Fe 2 ö 3 {001}>的Pt {111} /α-铁2 O 3{001}>的Pt {111} /的α-Fe 2 ö 3 {104}。密度函数理论基于预计的d带态密度，证明了金属与载体之间的强相互作用和吸附能随匹配的封闭表面而变化。与其它三种情况相比，铂{100}和α-Fe的组合2 ö 3 {104}成功削弱CO中毒，并且提供用于O-适当活性位点2的吸附。结果表明，小面匹配可能是设计具有增强催化性能的催化剂的可行方法。
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