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Enhancing Electroreduction of CO 2 to Formate of Pd Catalysts Loaded on TiO 2 Nanotubes Arrays by N, B‐Support Modification
Author(s) -
Bai Bing,
Chen Qingsong,
Zhao Xiuhui,
Zhuo Dehuang,
Xu Zhongning,
Wang Zhiqiao,
Wu Mingyan,
Tan Hongzi,
Peng Siyan,
Guo Guocong
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901211
Subject(s) - formate , catalysis , electrochemistry , selectivity , materials science , surface modification , inorganic chemistry , electrolyte , formate dehydrogenase , hydride , chemical engineering , metal , chemistry , electrode , organic chemistry , metallurgy , engineering
Electrochemical reduction of CO 2 to formate in aqueous electrolyte is a potentially effective route for energy storage and resource utilization of CO 2 . Pd is known as excellent catalyst for CO 2 electrochemical reduction, however, the selectivity to formate on Pd catalysts was limited to narrow potential window which may restrict their applications. Herein, N, B‐doped TiO 2 nanotube arrays (TNTA) were designed and synthesized to reveal the metal‐support interaction and its effects on the electrochemical reduction of CO 2 . The N, B doped TNTA supported Pd catalysts were found to highly enhance the activity with 3.7 and 4.6 times and the selectivity with 2 and 2.6 times comparing respectively to undoped one for CO 2 electrochemical reduction to formate at −1.0 V vs SCE. The enhancement of formate production can be attributed to the modification of electron structure facilitating the stabilization of active Pd hydride phase and suppressing the CO formation. This study will shed light on strategies to improve the performance of catalysts via the functionalization of supports in field of CO 2 selective electrochemical reduction.