کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4757464 1419759 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Priority CommunicationThe effect of surface strain on the CO-poisoned surface of Pt electrode for hydrogen adsorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Priority CommunicationThe effect of surface strain on the CO-poisoned surface of Pt electrode for hydrogen adsorption
چکیده انگلیسی


- Mechanical method is used to reduce the CO poisoning of catalysts.
- Strained CO-poisoned surface has a similar Pt-H binding energy of clean surface.
- Strain-induced decrease in adsorption energy is strongly dependent on CO coverage.
- Strain-induced reduction in CO-poisoning effect depends on CO coverage.

The impact of mechanical strain is studied at CO-poisoned Pt(1 1 1) surface for hydrogen adsorption. Our experiment first investigates a coupling parameter of interest, ζH, which quantifies the variation of hydrogen adsorption potential in response to surface strain. The result exhibits a bigger ζH at CO-poisoned surface than the value measured at clean surface. Since adsorption potential is linked to adsorption energy, it indicates significantly the larger effect of tensile strain on decreasing hydrogen adsorption energy at CO-poisoned surface, comparing to the clean surface. DFT calculations at an atomic level support the experimental observation and explain this behavior can be attributed to the strain-induced reduction in CO-poisoning effect on hydrogen adsorption energy.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 350, June 2017, Pages 212-217
نویسندگان
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