Catalytic and DRIFTS Studies of Pt-Based Bimetallic Alloy Catalysts in Aqueous-Phase Reforming of Glycerol,Industrial & Engineering Chemistry Research

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Catalytic and DRIFTS Studies of Pt-Based Bimetallic Alloy Catalysts in Aqueous-Phase Reforming of Glycerol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-19 , DOI: 10.1021/acs.iecr.8b05774
Yong Guo ₁ , Xiaohui Liu ₁ , Yanqin Wang ₁

Affiliation

PtM (M = Fe, Co, Ni, or Cu)/γ-Al₂O₃ catalysts with the same metals size and dispersion are prepared by loading presynthesized PtM colloids on γ-Al₂O₃. The effect on catalytic properties over different alloys are investigated by both glycerol aqueous-phase reforming (APR) and water gas shift (WGS) reactions. The Pt₁Fe₁/γ-Al₂O₃ catalyst performs the best activities for both APR and WGS. The relationship between WGS and APR is discussed and suggests that WGS plays a key role in APR. Furthermore, DRIFTS study is adopted to understand the possible reaction pathway. Fe plays two roles: (1) the Fe could facilitate the dissociation of H₂O to supply the OH group, which is necessary to react with CO adsorbed on Pt; (2) the formation of Pt₁Fe₁ alloy is beneficial to the decomposition/desorption of formate species that has a tendency to block the active sites. Finally, one possible mechanism of glycerol APR on Pt₁Fe₁ alloy catalyst is proposed.

中文翻译：

甘油水相重整中Pt基双金属合金催化剂的催化和DRIFTS研究

的PtM（M =铁，钴，镍，或Cu）/的γ-Al ₂ ö ₃具有相同尺寸的金属和分散的催化剂制备通过加载上预先合成的γ-Al的PtM胶体₂ ö ₃。通过甘油水相重整（APR）和水煤气变换（WGS）反应研究了对不同合金的催化性能的影响。将Pt ₁铁₁ /γ-Al系₂ ö ₃催化剂进行两种APR和WGS最好活动。讨论了WGS与APR之间的关系，并暗示WGS在APR中起着关键作用。此外，采用DRIFTS研究来了解可能的反应途径。Fe扮演两个角色：（1）Fe可以促进H的解离₂ O提供OH基，该OH基是与吸附在Pt上的CO反应所必需的；（2）Pt ₁ Fe ₁合金的形成有利于甲酸盐类物质的分解/脱附，该甲酸盐类物质具有阻塞活性位点的趋势。最后，提出了甘油APR在Pt ₁ Fe ₁合金催化剂上的一种可能机理。

更新日期：2019-02-19

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