Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO_2 nanocatalyst

Andrew Ng Kay Lup; Faisal Abnisa; Wan Mohd Ashri Wan Daud; Mohamed Kheireddine Aroua

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Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO_2 nanocatalyst

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The use of silver metal for hydrodeoxygenation(HDO) applications is scarce and different studies have indicated of its varying HDO activity. Several computational studies have reported of silver having almost zero turnover frequency for HDO owing to its high CO bond breaking energy barrier and low carbon and oxygen binding energies.Herein this work, titania supported silver catalysts were synthesized and firstly used to examine its phenol HDO activity via experimental reaction runs. BET, XRD, FESEM, TEM, EDX, ICP–OES, Pyridine-FTIR, NH_3-TPD and H_2-TPD analyses were done to investigate its physicochemical properties. Phenomena of hydrogen spillover and metal–acid site synergy were examined in this study. With the aid of TiO_2 reducible support, hydrogen spillover and metal–acid site interactions were observed to a certain extent but were not as superior as other Pt, Pd, Ni-based catalysts used in other HDO studies. The experimental findings showed that Ag/TiO_2 catalyst has mediocre phenol conversion but high benzene selectivity which confirms the explanation from other computational studies.

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《中国化学工程学报：英文版》 |2019年第2期|349-361|共13页
作者
Andrew Ng Kay Lup; Faisal Abnisa; Wan Mohd Ashri Wan Daud; Mohamed Kheireddine Aroua;
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作者单位

Department of Chemical Engineering;

Faculty of Engineering;

University of Malaya;

Centre for Carbon Dioxide Capture and Utilization;

School of Science and Technology;

Sunway University;

Department of Engineering;

Lancaster University;

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原文格式 PDF
正文语种 chi
中图分类化学工业;
关键词
Silver; based; catalyst; Physicochemical; properties; Hydrogen; spillover; Metal-acid; sites; Hydrodeoxygenation;

Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO_2 nanocatalyst

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