Time Resolved insitu DXAFS Revealing Highly Active Species of PdO Nanoparticle Catalyst for CH4 Oxidation

被引：28

作者：

Mahara, Yuji ^{[1
]}

Murata, Kazumasa ^{[1
]}

Ueda, Kakuya ^{[1
]}

Ohyama, Junya ^{[1
,2
]}

Kato, Kazuo ^{[3
]}

Satsuma, Atsushi ^{[1
,2
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

[2] Kyoto Univ, Unit Elements Strategy Initiat Catalysts Batterie, Kyoto 6158530, Japan

[3] Japan Synchrotron Radiat Res Inst, 1-1 Kouto, Sayo, Hyogo 6795198, Japan

来源：

CHEMCATCHEM | 2018年 / 10卷 / 16期

关键词：

Dispersive XAFS; In situ XAFS spectroscopy; Methane combustion; Pd redox; Supported Pd catalysts; ENERGY-DISPERSIVE XAFS; METHANE OXIDATION; OXYGEN STORAGE/RELEASE; CONTINUOUS NUCLEATION; ALPHA-ALUMINA; COMBUSTION; MECHANISM; TEMPERATURE; KINETICS; PD/AL2O3;

D O I：

10.1002/cctc.201800573

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The highly active species of Pd/Al2O3 catalysts for methane combustion was revealed by insitu time-resolved dispersive X-ray absorption fine structure (DXAFS) spectroscopy. By using CH4 as a reduction agent, PdO in Pd/Al2O3 is reduced in a 2-step model involving Pd-0 nucleation and growth of Pd-0 domain in a PdO particle. Kinetic analysis of the 2-step model reduction of PdO nanoparticles leads to a suggestion that partial formation of Pd-0 in a PdO particle accelerates methane combustion.

引用

页码：3384 / 3387

页数：4

共 23 条

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