Reverse water-gas shift reaction over Pt/MoOx/TiO2: reverse Mars-van Krevelen mechanism via redox of supported MoOx

被引：40

作者：

Mine, Shinya ^{[1
]}

Yamaguchi, Taichi ^{[1
]}

Ting, Kah Wei ^{[1
]}

Maeno, Zen ^{[1
]}

Siddiki, S. M. A. Hakim ^{[1
]}

Oshima, Kazumasa ^{[2
]}

Satokawa, Shigeo ^{[2
]}

Shimizu, Ken-ichi ^{[1
,3
]}

Toyao, Takashi ^{[1
,3
]}

机构：

[1] Hokkaido Univ, Inst Catalysis, N-21,W-10, Sapporo, Hokkaido 0010021, Japan

[2] Seikei Univ, Fac Sci & Technol, Dept Mat & Life Sci, Musashino, Tokyo 1808633, Japan

[3] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries, Katsura, Kyoto 6158520, Japan

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2021年 / 11卷 / 12期

关键词：

HETEROGENEOUS PLATINUM CATALYSTS; TEMPERATURE CO2 HYDROGENATION; CARBON-DIOXIDE; PRODUCT SELECTIVITY; INTERFACIAL SITES; LIQUID FUELS; ACTIVE-SITE; PERFORMANCE; CONVERSION; ACTIVATION;

D O I：

10.1039/d1cy00289a

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 reverse water-gas shift (RWGS) reaction is a promising catalytic route for reducing CO2 emissions because its product, CO, is a key intermediate in various industrialized catalytic processes that produce fuels and chemicals. We describe herein a MoOx/TiO2-supported Pt catalyst (Pt(3)/MoOx(15)/TiO2; Pt loading = 3 wt%, MoO3 loading = 15 wt%) that promotes the RWGS reaction at low temperature (200-300 degrees C) with high activity and selectivity. The catalytic performance for both CO2 conversion and selectivity of Pt(3)/MoOx(15)/TiO2 is better than those of Pt catalysts on other supports and other metal catalysts supported on MoOx(15)/TiO2, as well as Cu- and Fe-Cr-based industrial catalysts. Moreover, results of operando X-ray absorption spectroscopy studies show that the reaction takes place via the reverse Mars-van Krevelen mechanism where H-2 acts as a reducing agent to create oxygen vacancies on the supported Mo oxide species that are filled by CO2 as an oxidizing agent.

引用

页码：4172 / 4180

页数：9

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