Activating the Pd-Based catalysts via tailoring reaction interface towards formic acid dehydrogenation

• Published in: International journal of hydrogen energy 2020-07, Vol.45 (35), p.17575-17582
• Main Authors: Gao, Nanxing, Ma, Rongpeng, Wang, Xian, Jin, Zhao, Hou, Shuai, Xu, Weilin, Meng, Qinglei, Ge, Junjie, Liu, Changpeng, Xing, Wei
• Format: Article
• Language: English
• Subjects: Formic acid dehydrogenation; Interfacial microenvironment regulation; Pd–PdO interfaces; Polyaniline-decorated
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2020.04.289

Formic acid dehydrogenation (FAD) offers an ideal route for hydrogen production, where searching for efficient and selective catalysts is imperative. However, the current state-of-the-art Pd-based metallic catalysts severely suffer from low catalytic efficiency and self-poisoning, owning to the FA dehydration side reaction. In this work, we design PANI-Pd/C composite catalysts via interfacial microenvironment regulation technique. The as-prepared 0.01-PANI-Pd/C catalyst exhibits high turnover frequency (TOF, 5654 h−1) and excellent resistance to CO poisoning. The merit of polyaniline can be ascribed to: a) construction of abundant Pd–PdO interfaces; b) capturing H+ and accelerating the formation of the reactive species. [Display omitted] •Boosting the Pd catalytic activity via constructing the Pd-polyaniline interface.•Simultaneously tailoring Pd–PdO ratio and regulating formic acid deprotonation.•The excellent activity and selectivity towards FAD at room temperature.