Probing the effect of the Pt-Ni-Pt(111) bimetallic surface electronic structures on the ammonia decomposition reaction.

Zhong, Jian-Qiang; Zhou, Xiong; Yuan, Kaidi; Wright, Christopher A; Tadich, Anton; Qi, Dongchen; Li, He Xing; Wu, Kai; Xu, Guo Qin; Chen, Wei

Zhong, Jian-Qiang; Zhou, Xiong; Yuan, Kaidi; Wright, Christopher A; Tadich, Anton; Qi, Dongchen; Li, He Xing; Wu, Kai; Xu, Guo Qin; Chen, Wei.

Afiliación

Zhong JQ; Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore. jzhong@bnl.gov phycw@nus.edu.sg and Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore, Singapore and Singapore-Peking University Research Centre (SP
Zhou X; Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore. jzhong@bnl.gov phycw@nus.edu.sg and Singapore-Peking University Research Centre (SPURc), 1 CREATE Way, #15-01, CREATE Tower, 138602, Singapore, Singapore.
Yuan K; Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore, Singapore and Singapore-Peking University Research Centre (SPURc), 1 CREATE Way, #15-01, CREATE Tower, 138602, Singapore, Singapore.
Wright CA; Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia.
Tadich A; Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia and Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia.
Qi D; Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia.
Li HX; Chinese Education Ministry Key Laboratory of Resource Chemistry, Shanghai Normal University, Shanghai, 200234, China.
Wu K; Singapore-Peking University Research Centre (SPURc), 1 CREATE Way, #15-01, CREATE Tower, 138602, Singapore, Singapore and College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Xu GQ; Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore. jzhong@bnl.gov phycw@nus.edu.sg and Singapore-Peking University Research Centre (SPURc), 1 CREATE Way, #15-01, CREATE Tower, 138602, Singapore, Singapore and National University of Singapore (
Chen W; Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore. jzhong@bnl.gov phycw@nus.edu.sg and Department of Physics, National University of Singapore, 2 Science Drive 3, 117542, Singapore, Singapore and Singapore-Peking University Research Centre (SP

Nanoscale ; 9(2): 666-672, 2017 Jan 05.

Article en En | MEDLINE | ID: mdl-27942692

ABSTRACT

ABSTRACT

We report a detailed investigation of elementary catalytic decomposition of ammonia on the Pt-Ni-Pt(111) bimetallic surface using in situ near ambient pressure X-ray photoelectron spectroscopy. Under the near ambient pressure (0.6 mbar) reaction conditions, a different dehydrogenation pathway with a reduced activation energy barrier for recombinative nitrogen desorption on the Pt-Ni-Pt(111) bimetallic surface is observed. The unique surface catalytic activity is correlated with the downward shift of the Pt 5d band states induced by the Ni subsurface atoms via charge redistribution of the topmost Pt layer. Our results provide a practical understanding of the unique chemistry of bimetallic catalysts for facile ammonia decomposition under realistic reaction conditions.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2017 Tipo del documento: Article